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Articles 301 - 330 of 777
Full-Text Articles in Environmental Studies
Phytoplankton-Water Quality Relationship In Water Bodies In The Mekong Delta, Vietnam, Giao Thanh Nguyen, Huynh Thi Hong Nhien
Phytoplankton-Water Quality Relationship In Water Bodies In The Mekong Delta, Vietnam, Giao Thanh Nguyen, Huynh Thi Hong Nhien
Applied Environmental Research
The study was conducted in March 2019 in three areas subject to impacts of agricultural production, residential areas and landfill in An Giang(Area 1), Kien Giang (Area 2) and Can Tho (Area 3), respectively, to assess relationship between water quality and diversity of phytoplankton. The results showed that water quality at 25 study sites is contaminated with organic matters, suspended solids and coliforms. The study found 422 species of phytoplankton belonging to five phyla of Bacillariophyta, Chlorophyta, Dinophyta, Cyanophyta and Euglenophyta. The density of phytoplankton in the three studied areas ranged from 13 to 77,328 individuals L-1. Among the areas, …
Comparative Global Warming Potential As Environment Protection Criteria Of Production Systems: A Case Study Of Philippine Chicken Meat Sector, Theresa M. Espino, Luzvisminda M. Bellotindos
Comparative Global Warming Potential As Environment Protection Criteria Of Production Systems: A Case Study Of Philippine Chicken Meat Sector, Theresa M. Espino, Luzvisminda M. Bellotindos
Applied Environmental Research
Demand for chicken meat has been increasing tremendously over the years globally at an average 2.4% per annum and in the Philippines at an average of 3.4% per annum. In view of the sustainable development goal (SDG) 13: Climate Change, the chicken meat sector needs to embark on more efficient production. It is not just about producing enough food, but doing itin a sustainable way. This study aimed to demonstrate the identification, evaluation and comparison ofthe environmental impacts of Philippine chicken meat production systems. The analysis was done through the cradle-to-gate life cycle assessment (LCA) methodology and supported with the …
Perception And Behavioral Changes Of Thai Youths Towards The Plastic Bag Charging Program, Sujitra Vassanadumrongdee, Dawisa Hoontrakool, Danny Marks
Perception And Behavioral Changes Of Thai Youths Towards The Plastic Bag Charging Program, Sujitra Vassanadumrongdee, Dawisa Hoontrakool, Danny Marks
Applied Environmental Research
Thailand has one of the highest usage of plastic bags globally, with over 45,000 million plastic carrier bags used annually. Because of its high plastic consumption and mismanagement of plastic waste, Thailand was ranked sixth globally in terms of its contribution to marine plastic pollution in 2015. While many countries have introduced plastic bag charges or taxes to reduce consumption, the Thai government is reluctant to do likewise due to political concerns about whether the public will accept this. This study presents findings on perception and acceptance level of university students towards plastic bag charging program in their campuses. We …
Health Risk Assessment Of Pesticide Residues In Vegetables From River Basin Area, Supawat Chaikasem, Veerapas Na Roi-Et
Health Risk Assessment Of Pesticide Residues In Vegetables From River Basin Area, Supawat Chaikasem, Veerapas Na Roi-Et
Applied Environmental Research
Environmental contaminations with pesticides are considered as one of the major environmental pathways of human exposure leading to a potential threat to human health, especially if there is an accumulation in the trophic levels. This study purposed to investigate the level of pesticide residues and the potential health risk associated with vegetables, surface water, and sediment obtained from the river basin area. The concentrations of 87 pesticides from four main groups namely; organophosphate, organochlorine, pyrethroid, and persistent organic pollutants (POPs) were verified by triple quadrupole GC-MS/MS. The concentration of Parathion methyl, Methidathion, Bromophos methyl, Chlorfenvinphos, Triazophos, Azinphos ethyl, and D-trans-Phenothrin …
Biomass Leaching And Dynamics Of Nutrients, Microbial Abundance And Activity During Decomposition Of Seagrass Cymodocea Rotundata Necromass, Michael A. Clores, Maria A.A. Conde, Judy D.V. Perez
Biomass Leaching And Dynamics Of Nutrients, Microbial Abundance And Activity During Decomposition Of Seagrass Cymodocea Rotundata Necromass, Michael A. Clores, Maria A.A. Conde, Judy D.V. Perez
Applied Environmental Research
Examining how seagrass decomposition contributes to trophic pathways in marine ecosystems is crucial in understanding seagrass production. Decomposition rates of seagrasses may depend on many factors such as chemical composition and microbial colonization. In this study, microbial colonization and changes in chemical composition of decomposing material (necromass) of Smooth Ribbon Seagrass, Cymodocea rotundata of Bogtong Bay, Lahuy Island, Caramoan, Philippines were monitored. Seagrass litter were placed in litterbags and incubated in the seagrass meadow in situ for 56 d. Serial dilution, viable plate counts and microbial oxygen consumption analyses were done and gravimetry, Kjeldahl method and acid hydrolysis were used …
Assessment Of Sustainable Utilization Of Ecosystem Services In Different Stages Of Mangrove Forest Restoration At Klong Khone Sub-District, Samut Songkhram Province, Thailand, Wipapan Adulcharoen, Kallaya Suntornvongsakul, Yang-Soo Lee
Assessment Of Sustainable Utilization Of Ecosystem Services In Different Stages Of Mangrove Forest Restoration At Klong Khone Sub-District, Samut Songkhram Province, Thailand, Wipapan Adulcharoen, Kallaya Suntornvongsakul, Yang-Soo Lee
Applied Environmental Research
Understanding the function of the ecological restoration of mangrove forests leads to appropriatesustainable utilization (SU) of ecosystem services (ES) during development stages of mangrove ecosystem for sustaining the local livelihood and maintaining the mangrove ecological production. The study aims to identify the SU which was changed relying a development of ES at Klong Khone (KK) Sub-district, Samut Songkhram Province, Thailand. The SU was collected by in-depth interview with 20 key respondents, questionnaires survey with 140 fishermen and statistical scientific data on developed mangrove forest areas. Descriptive statistics and event analysis were employed to analyze the data. The study found that …
Environmental Pollution Of Heavy Metals In A Vietnamese Informal E-Waste Processing Village, Hien Thi Thu Ngo, Li Liang, Diep Bich Nguyen, Hai Ngoc Doan, Pensri Watchalayan
Environmental Pollution Of Heavy Metals In A Vietnamese Informal E-Waste Processing Village, Hien Thi Thu Ngo, Li Liang, Diep Bich Nguyen, Hai Ngoc Doan, Pensri Watchalayan
Applied Environmental Research
Inappropriate handlings of informal e-waste processing have increasingly become a global environmental and public health issue of concern. This study was conducted to quantify the concentrations of five heavy metals found in the environmental media at an exposed village and a reference village in Northern Vietnam. The correlations between a pair of the heavy metals found in a medium, and between a pair of the environmental media was found. The results showed that drinking water was safe for heavy metal exposure in both studied villages. However, at the exposed village, the levels of the heavy metals found in indoor soil …
Evaluating Current Water Quality Monitoring System On Hau River, Mekong Delta, Vietnam Using Multivariate Statistical Techniques, Giao Thanh Nguyen
Evaluating Current Water Quality Monitoring System On Hau River, Mekong Delta, Vietnam Using Multivariate Statistical Techniques, Giao Thanh Nguyen
Applied Environmental Research
This study aims to assess the sampling sites and frequencies of sampling of the existing surface water quality monitoring on Hau River using multivariate analysis techniques. Principal Component Analysis (PCA) and Cluster Analysis (CA) were used to analyze the water quality monitoring data collected every month in 2018 from 8 sampling stations. Surface water quality parameters including pH, temperature, dissolved oxygen (DO), total suspended solids (TSS), nitrate (N-NO3-), phosphate (P-PO43-), chemical oxygen demand (COD) and coliforms were used in the PCA and CA analyses. The findings indicated that the Hau River water quality was polluted by TSS, COD and coliforms …
Assessment Of Organophosphate And Carbamate Insecticides And Heavy Metal Contamination In Canal-Grown Water Morning Glory (Ipomoea Aquatica Forssk) In Nakhon Nayok Province, Thailand, Sirikul Thummajitsakul, Noramon Thongkerd, Banthitar Pholmeesap, Piyaporn Phankham, Kun Silprasit
Assessment Of Organophosphate And Carbamate Insecticides And Heavy Metal Contamination In Canal-Grown Water Morning Glory (Ipomoea Aquatica Forssk) In Nakhon Nayok Province, Thailand, Sirikul Thummajitsakul, Noramon Thongkerd, Banthitar Pholmeesap, Piyaporn Phankham, Kun Silprasit
Applied Environmental Research
Excessive application of insecticides in agriculture has become an increasing trend in Thailand, where agriculture is common in the area. This problem leads to negative impacts on human health and environment. Therefore, this study focused on monitoring organophosphate and carbamate insecticides, and heavy metals (Cd, Cu, Pb, Ni, Hg, Zn and Mn) in Ipomoea aquaticaForssk, as well as water and soil from different canals in Ongkharak District, Nakhon Nayok Province, Thailand. The powder samples were prepared from roots, stems and leaves of Ipomoea aquaticaForssk, as well as soil. Then, anti-acetylcholinesterase activity of each sample was determined, and heavy metal contents …
Evaluation Of Meskat System Functionality As Water Harvesting At Wadi Hamdoun Watershed (Sousse, Tunisia) Using The Geographic Information System, Asma B. Salem, Soumaia M’Nassri, El A. Asma, Riadh Bouaziz, Rajouene Majdoub
Evaluation Of Meskat System Functionality As Water Harvesting At Wadi Hamdoun Watershed (Sousse, Tunisia) Using The Geographic Information System, Asma B. Salem, Soumaia M’Nassri, El A. Asma, Riadh Bouaziz, Rajouene Majdoub
Applied Environmental Research
In the Sahel of Tunisia, areas were characterized by complex landforms like hills and depression with active and alternation of the geographical processes between bare hilly limestones and fertile soils. These landforms consist of the Meskat system. It represents the commonly used micro-catchment of water harvesting for olive tree groves as traditional soil and water conservation technique. However, in recent years, this system seems to be increasinglyneglected. The present study aims to determine the current functionality of the Meskat systemin the watershed of Wadi Hamdoun through the use of a geographic information system (GIS) as well as field's investigation. Results …
A 177 Years Extended Of Teak Chronology Revealing To The Climate Variability In Phrae Province, Northern Of Thailand, Kanokrat Buareal, Supaporn Buajan, Sineenart Preechamart, Chotika Muangsong, Nathsuda Pumijumnong
A 177 Years Extended Of Teak Chronology Revealing To The Climate Variability In Phrae Province, Northern Of Thailand, Kanokrat Buareal, Supaporn Buajan, Sineenart Preechamart, Chotika Muangsong, Nathsuda Pumijumnong
Applied Environmental Research
Teak ring-width is one of the promising paleoclimate proxies in the tropical region. Tree-ring chronology spanning from 1840 to 2016 (177 years) was derived from 76trees from Phrae Province, northern Thailand. A total of 141 core samples were cross-dated, a standardized master was constructed, and the tree residual master chronology was developed by ARSTAN program. The tree-ring chronology has a significant positivecorrelation with the monthly rainfall and relative humidity during the monsoon season (May - June). In addition, the growth of tree-ring width also significantly inversely correlated with Niño 3, Niño 3.4, and Niño 4 indices during the second half …
Analysis Of Environmental Performances Of Ferritization Method For The Treatment Of Copper-Ammonia Wastewater Under The Optimized Condition Via Rsm, Kanokporn Supong, Parnuwat Usapein, Pirapan Polburee
Analysis Of Environmental Performances Of Ferritization Method For The Treatment Of Copper-Ammonia Wastewater Under The Optimized Condition Via Rsm, Kanokporn Supong, Parnuwat Usapein, Pirapan Polburee
Applied Environmental Research
Copper-ammonia wastewater from industrial processes is an important form of hazardous waste that can contaminate water resources. The conventional hydroxide precipitation method used to remove copper complexes produces a large volume of unstable precipitates which still require further treatment. Ferritization is a powerful technique to remove bivalent cations from wastewater in the form of metal ferrites. This method is highly efficient in removal of metal complex ions; in addition, sludge resulting from this method is stable. The objective of this study was to investigate optimum conditions for ferritization using Response Surface Methodology (RSM). After optimal conditions were determined, the environmental …
Estimation Of Streamflow With Incomplete Soil Dataset In Krasioa Basin Using Soil-Landscape Evaluation Approach And Swat Model, Isared Kakarndee, Ekasit Kositsakulchai
Estimation Of Streamflow With Incomplete Soil Dataset In Krasioa Basin Using Soil-Landscape Evaluation Approach And Swat Model, Isared Kakarndee, Ekasit Kositsakulchai
Applied Environmental Research
Data on soil properties are indispensable for process-based hydrological modeling. Soil information of Thailand is primarily provided by the Land Development Department (LDD), nevertheless soil property data are available only in arable land whose slope is less than 35%. The steep-slope land was generally labeled as Slope Complex (SC), there is no informationavailable. This paper demonstrated the application of soil-landscape evaluation approach for predicting the missing properties of soil which resulted on enhancement of model performance in streamflow estimation in Krasioa Basin by the Soil and Water Assessment Tool (SWAT) model. The physical properties of soil-soil thickness, fraction of soil …
Source And Health Risk Assessment Of Some Heavy Metals In Non-Certified Organic Rice Farming At Nakhon Nayok Province, Thailand, Porntiwa Satachon, Sasithorn Keawmoon, Patcharida Rengsungnoen, Sirikul Thummajitsakul, Kun Silprasit
Source And Health Risk Assessment Of Some Heavy Metals In Non-Certified Organic Rice Farming At Nakhon Nayok Province, Thailand, Porntiwa Satachon, Sasithorn Keawmoon, Patcharida Rengsungnoen, Sirikul Thummajitsakul, Kun Silprasit
Applied Environmental Research
Heavy metals contamination is a problem in some non-certified organic rice farms that do not have buffer zones. Soil monitoring is therefore required to estimate the potential risk of such organic products. The objectives of the present study are to determine the extent of heavy metal contamination, sources of contamination and assessment of non-carcinogenic health risks to local consumers. Concentrations of toxic heavy metals were determined in soil and rice grain to assess the bioaccumulation factor. The health risk assessment was analyzed following Target Hazard Quotients (THQ) and the Hazard Index (HI). Sources of heavy metal contamination were determined by …
Determination Of Soil Properties And Fungal Interrelations Influenced By Forest Restoration On A Contaminated Zinc Mining Area, Chutima Kantrong, Kallaya Suntornvongsakul, Yang-Soo Lee
Determination Of Soil Properties And Fungal Interrelations Influenced By Forest Restoration On A Contaminated Zinc Mining Area, Chutima Kantrong, Kallaya Suntornvongsakul, Yang-Soo Lee
Applied Environmental Research
Forest restoration in a contaminated zinc mining area must take into account the environmental soil properties. This study aimed to analyze the soil properties from the three different stages of restored forests, at 3, 7 and 17, focusing on the impact on soil microorganismsand availability of fungal species. Three study sites were selected, all located in a zinc mining area in Mae Sot District, Tak Province, Thailand. The results showed that observed soil properties especially soil texture,moisture and nutrients differed between stand initiation and regrowth forests and affected the distribution of fungal species. Soils in older forest stands up to …
A Study On Developing Ventilation In Restaurants In Re-Purposed Row Houses, Sumavalee Chindapol
A Study On Developing Ventilation In Restaurants In Re-Purposed Row Houses, Sumavalee Chindapol
Applied Environmental Research
The building ventilation of seventy-seven row houses in eight districts in Chiang Mai province of Thailand was surveyed and investigated. A typical row house re-purposed as a restaurant refers to a 3.5 m high space with two stoves in the front of the building and a closed rear area to serve as storage. As a base-case, restaurants had an average capacity of 24 customers in the dining area. Measurements of internal air quality of a selected restaurant were conducted in the summer season of 2015 and 2017, and the results revealed average air temperatures of 36°C and 33°C, relative humidity …
Biosurfactant Production By Rhizospheric Bacteria Isolated From Biochar Amended Soil Using Different Extraction Solvents, Seun O. Adebajo, Aderonke K. Akintokun, Abidemi E. Ojo, Dami M. Egbagbe, Pius O. Akintokun, Lawrence O. Adebajo
Biosurfactant Production By Rhizospheric Bacteria Isolated From Biochar Amended Soil Using Different Extraction Solvents, Seun O. Adebajo, Aderonke K. Akintokun, Abidemi E. Ojo, Dami M. Egbagbe, Pius O. Akintokun, Lawrence O. Adebajo
Applied Environmental Research
Microbial-derived surface-active compounds (biosurfactants) have attracted attention due to their low toxicity, cost-effectiveness, biodegradable nature and environment compatibility. Due to paucity of knowledge in the production of biosurfactant by microorganisms from other sources such as biochar-amended soil, the present study investigates the potential of rhizospheric bacteria isolated from biochar amended soil of okra plant in the production of biosurfactants using different recovery techniques. Rhizospheric bacteria were screened for biosurfactant productionusing Haemolytic, Oil spreading, Drop collapse, Methylene blue method, Bacterial adhesion to hydrocarbon and Emulsification activity. The biosurfactant was extracted using different extraction solvents (acid precipitation, ethyl acetate, acetone, dichloromethane and …
Trophic Models Of Seagrass Ecosystems In Maqueda Channel, Caramoan Peninsula, Philippines, Michael A. Clores, Michael A. Cuesta
Trophic Models Of Seagrass Ecosystems In Maqueda Channel, Caramoan Peninsula, Philippines, Michael A. Clores, Michael A. Cuesta
Applied Environmental Research
Steady-state trophic models were constructed using the Ecopath with Ecosim software to examine the general status, development trends, and functional integrity of three extensive seagrass meadows located in Maqueda Channel of Caramoan Peninsula, Southern Luzon Island, Philippines. The results show that the ecosystems are composed of 23-24 functional groups with effective trophic levels extending from 1.00 to 3.76. Mixed trophic impacts show that decrease in the biomass of grazers Tripneustes gratilla (collector urchin) had a positive impact on the biomass of seagrasses. On the other hand, a positive effect on the benthic groups is expected with an assumed decrease in …
Effect Of Synthesized Conditions Of Cu-K-Oms-2 On Toluene Oxidation Performance, Chatkamol Kaewbuddee, Narong Chanlek, Kitirote Wantala
Effect Of Synthesized Conditions Of Cu-K-Oms-2 On Toluene Oxidation Performance, Chatkamol Kaewbuddee, Narong Chanlek, Kitirote Wantala
Applied Environmental Research
The objective of this study was to optimize synthesis conditions for the Cu-K-OMS-2 hydrothermal process. The effects of ageing temperature, ageing time and amount of copper(Cu) dopant were considered via using the Box-Behnken design (BBD) method to characterizethe conditions for gaseous toluene degradation. In the models studied, the independent variables were ageing temperature (55-145ºC), ageing time (6-18 h) and amount of Cu dopant (2-6% mole). The quadratic model fitted very well with the experimental data (15 runs), which showed a higher value of R2(0.98) and adjusted R2(0.95), confirming that the model can explain the results successfully. Ageing temperature was found …
Environmental Soil, Water, And Sediment Quality Of Dong Thang Landfill In Can Tho City, Vietnam, Huynh T. H. Nhien, Giao T. Nguyen
Environmental Soil, Water, And Sediment Quality Of Dong Thang Landfill In Can Tho City, Vietnam, Huynh T. H. Nhien, Giao T. Nguyen
Applied Environmental Research
This study is a preliminary assessment of water, soil, and bottom sediment quality at and around Dong Thang landfill in Co Do district, Can Tho city, Vietnam. Four canal water samples, one leachate sample, and three soil samples from the surrounding rice fields, two bottom sediment samples from the canals, and one bottom sediment sample from the leachate pond were examined for this purpose. The results revealed that the leachate sample contained six heavy metals (Mn, Fe, Cu, Zn, Cr, and Ni) with high electrical conductivity (EC), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), ammonia …
Applying The New Theory To Assessment Criteria Of Agricultural Water Management Schemes For Sustainable Rain-Fed Agriculture In Thailand, Anutra Wannaviroj, Thavivongse Sriburi
Applying The New Theory To Assessment Criteria Of Agricultural Water Management Schemes For Sustainable Rain-Fed Agriculture In Thailand, Anutra Wannaviroj, Thavivongse Sriburi
Applied Environmental Research
This paper describes the selection of assessment criteria to assess agricultural water management schemes for on-farm ponds to support sustainable rain-fed agriculture, guided by the New Theory of His Majesty King Bhumibol Adulyadej. The candidate set of criteria was obtained from several international and national sources related to sustainable rain-fed agriculture and the New Theory. The criteria were reviewed and modified by the expert team based on the goals of the New Theory in order to define an initial site-specific set of criteria that conform with the context of socio-topographical conditions of Thailand. The team screened,assessed, and prioritized the criteria …
Updated Basis Knowledge Of Climate Change Summarized From The First Part Of Thailand's Second Assessment Report On Climate Change, Atsamon Limsakul, Boonlue Kachenchart, Patama Singhruck, Suriyan Saramul, Jerasorn Santisirisomboon, Somkiat Apipattanavis
Updated Basis Knowledge Of Climate Change Summarized From The First Part Of Thailand's Second Assessment Report On Climate Change, Atsamon Limsakul, Boonlue Kachenchart, Patama Singhruck, Suriyan Saramul, Jerasorn Santisirisomboon, Somkiat Apipattanavis
Applied Environmental Research
Recent evidence and key issues on climate change in Thailand have been presented in the first part of Thailand's Second Assessment Report on Climate Change (2ndTRAC). The report highlights key findings including 1) a significant country-wide warming of 1.30 oC over the past 48 years (1970-2017); b) significant changes in rainfall patterns at smaller spatial and finer temporal scales; c) significant changes in temperature and rainfall extreme events over the last four-five decades; d) a significant decrease in frequency of tropical cyclones entering Thailand; e) significant rise in sea level in the seas around Thailand at higher rates than the …
Waste Composition Evaluation For Solid Waste Management Guideline In Highland Rural Tourist Area In Thailand, Nittaya Pasukphun, Yanasinee Suma, Anuttara Hongtong, Vivat Keawdunglek, Pussadee Laor, Tawatchai Apidechkul
Waste Composition Evaluation For Solid Waste Management Guideline In Highland Rural Tourist Area In Thailand, Nittaya Pasukphun, Yanasinee Suma, Anuttara Hongtong, Vivat Keawdunglek, Pussadee Laor, Tawatchai Apidechkul
Applied Environmental Research
This study investigated municipal solid waste generation rate and its compositionincluding the level of knowledge, attitude and practice on municipal solid waste (MSW) management of highland rural tourist area in Chiang Rai Province, Mae Salong Nok Sub-district, Thailand in order to propose the guidelines for effective MSW in rural tourist areas. Samples of MSW were collected during weekdays and several weekends, and separated into 4 categories: general,recyclable, organic and hazardous waste. About 40 % of the MSW consisted of organic waste; plastic bags were widely present, comprising more than 60 % of the mass of the general waste group. Level …
Sustainable Transition Models For Municipal Solid Waste Management: A Case Study Of Saraburi Provincial Administration Organization, Thailand, Siwaree Boonthavornsatien, Dawan Wiwattanadate
Sustainable Transition Models For Municipal Solid Waste Management: A Case Study Of Saraburi Provincial Administration Organization, Thailand, Siwaree Boonthavornsatien, Dawan Wiwattanadate
Applied Environmental Research
Municipal solid waste (MSW) generation exceeding the capacity of mechanical biological treatment (MBT) plants is a major problem for most municipalities in Thailand. The problem is serious for the Saraburi Provincial Administration Organization (SPAO) as the high daily volumes of MSW sent to the SPAO greatly exceeds the MBT plant capacity of 20 ton d-1. This results in accumulation and ultimately, open-dumping of MSW. Transition from a small (< 50 ton d-1) to a medium-sized cluster (50 - 300 ton d-1) is under consideration to address this problem. Therefore, this study evaluated pre-feasibility information, comparing two possible transition models. Model 1 proposes modification of the existing MBT plant to enlarge its capacity to 50 ton d-1, while Model 2 would require establishing a new medium-sized MBT plant (50 - 70 ton d-1). Results from field data collection as well as mass balance calculation and financial modelling indicate that without additional income from tipping or MSW management fee as well as sale of recyclable materials and scrap metals, both models exhibit negative net present value (NPV) or are not economically feasible due to high initial investment in machinery. However, sensitivity analysis based on an expected fall in future machinery prices indicates that the NPV for both models become positive if prices fall by a minimum 20 %. Due to the much higher initial investment, but the higher capacity with higher separation technology and the higher environmental benefits as well as higher ratings for sustainable development indicators, Model 2 is recommended for a long-term transition. Model 1 can still be recommended for a short - to medium-term transition. Results from in-depth interviews also confirm that Model 1, which offers additional local employment and incomes from selling recyclable materials and scrap metals would be the more feasible option owing to familiarity with the process and its lower initial investment requirement.
Preliminary Study Of Distribution And Quantity Of Plastic-Debris On Beaches Along The Coast At Phuket Province, Pensiri Akkajit, Sudarat Thongnonghin, Siriporn Sriraksa, Supissara Pumsri
Preliminary Study Of Distribution And Quantity Of Plastic-Debris On Beaches Along The Coast At Phuket Province, Pensiri Akkajit, Sudarat Thongnonghin, Siriporn Sriraksa, Supissara Pumsri
Applied Environmental Research
The beach sediment samples from Kalim, Tri Trang, and Patong Beaches, Phuket Province, southern of Thailand were collected for preliminary investigation on coastal debris. A total of 9 samples were taken from a 1 x 1 m quadrat at the depth of 5 cm, parallel with the shore during the period of maximum low tides in November, 2018. Microplastics (particles size < 5 mm) were extracted using sodium chloride (1.15 g mL-1) and their characteristics- including abundance (items m-2), weight (g), density (itemsm-2), color and shape- were determined using a stereo microscope. The results showed that microplastic debris varied in abundance from 1 to 35 items m-2 at the three selected beaches, depending on sampling location. In comparison, abundance of macroplastic (> 2.5 cm) and mesoplastic debris (5 mm to 2.5 cm) varied from 1 item m-2 quadrat (Kalim Beach) to 38 items (Patong Beach), 9 items (Tri Trang Beach) and 68 items (Patong Beach) m-2. Blue fibers were predominant among …
Utilization Of Fruit Waste For Bioethanol Production By Co-Cultures Of Aspergillus Niger And Saccharomyces Cerevisiae, Nutchanat Chamchoi
Utilization Of Fruit Waste For Bioethanol Production By Co-Cultures Of Aspergillus Niger And Saccharomyces Cerevisiae, Nutchanat Chamchoi
Applied Environmental Research
The purpose of this research was to study the effectiveness of simultaneous fermentation offruit waste with co-cultures of Aspergillus niger TISTR 3063 and Saccharomyces cerevisiaeTISTR 5606 in production of ethanol. The effect of fermentation temperature on ethanol yield was also observed. Pomelo and banana peels were selected as substrates and prepared by chopping into small rectangular pieces. Fermentation of batches of fruit waste was carriedout using a 250mL Erlenmeyer flask with glucose as a control. Analysis of the composition of the fruit waste included sugar, pH, TS, VS, ash, moisture, COD and TKN. From the results, it was found that …
Avifauna Survey Within A University Campus And Adjacent Forest Fragment In Bicol, Eastern Philippines, Jocelyn E. Serrano, Jonathan J.G. Guerrero, Josiah D.G. Quimpo, Giovani C. Andes, Erwin N. Bañares, Mheljor A. General
Avifauna Survey Within A University Campus And Adjacent Forest Fragment In Bicol, Eastern Philippines, Jocelyn E. Serrano, Jonathan J.G. Guerrero, Josiah D.G. Quimpo, Giovani C. Andes, Erwin N. Bañares, Mheljor A. General
Applied Environmental Research
With the lack of baseline information on avifauna within Bicol University and the adjacent forest fragment, this research aimed to identify bird species and compare their presence between an urbanized and forest areas. Avian diversity was documented within the Kalikasan Park and Bicol University Main Campus adjacent ecosystems, representing a forest fragment and semi-urbanized ecosystems, respectively. Bird survey was carried out through point count method. Identification was aided by existing taxonomic keys. A total of 44 species were recorded with eleven as Philippine endemics. Lonchura malacca(Chestnut Munia) and Aplonis panayensis (Asian Glossy Starling) were among the most frequently sighted. Bird …
Reduction Of Ghg Emissions Using Zeolite 4a Under Different Fertilizer Usages In Rice Cultivation, Patthanant Natpinit, Borisut Chantrawongphaisal, Rewadee Anuwattana, Thitirat Ditkaew, Chotika Kongsomboon, Phavit Thapnui, Phongsak Hongcharoensri
Reduction Of Ghg Emissions Using Zeolite 4a Under Different Fertilizer Usages In Rice Cultivation, Patthanant Natpinit, Borisut Chantrawongphaisal, Rewadee Anuwattana, Thitirat Ditkaew, Chotika Kongsomboon, Phavit Thapnui, Phongsak Hongcharoensri
Applied Environmental Research
This investigation examined the potential of zeolite 4A to reduce emission of greenhouse gases (GHGs) in rice cultivation under different fertilizer regimes. A completely randomized design was used with four treatments (different fertilizer application method) and 2 blocks (zeolite 4A application, using rice variety RD-41 sown at a seed rate of 15.625 g m-2, and harvested in 105 d in Lam Ta Khong Research Station, Nakhon Ratchasima. The experimental results demonstrated that significant reduction in GHG emissions in zeolite 4A treated plots, either alone or in combination with chemical fertilizers, with GHG reduction of 43.27 % and 34.69 %, respectively. …
Synthesis Of Calcium Oxide From River Snail Shell As A Catalyst In Production Of Biodiesel, Sasiprapha Kaewdang, Rotjapun Nirunsin
Synthesis Of Calcium Oxide From River Snail Shell As A Catalyst In Production Of Biodiesel, Sasiprapha Kaewdang, Rotjapun Nirunsin
Applied Environmental Research
This research studied synthesis of calcium oxide from river snail shells by calcination at 700,800 and 900 °C for 4 h, and its subsequent use as a catalyst for biodiesel production. The calciumoxide fraction in calcined river snail shell was analyzed by X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRF result showed calciumoxide levels of 59.499 %, 70.113 % and 73.88 1%, respectively, at corresponding calcination temperatures of 700, 800 and 900 °C. The SEMimages revealed porous, rough, and fragile surfaces which became agglomerated at elevated temperatures. The calcium oxide obtained from each calcination temperature …
Assessment Of Hearing Loss Among Workers In A Power Plant In Thailand, Pensri Watchalayann, Laksana Laokiat
Assessment Of Hearing Loss Among Workers In A Power Plant In Thailand, Pensri Watchalayann, Laksana Laokiat
Applied Environmental Research
Noise exposure in the working environment is a major cause of hearing impairment for workers; an audiogram hearing threshold level above 20 dB is considered irregular. In this study, audiometric data were analyzed with the objective of assessing hearing loss among power plant workers based on their age, noise exposure level, years of working, and work characteristics. A cross-sectional study was conducted to assess hearing level data for 672 workers reserved by the Health Care Unit of the power plant. The most recent audiometric data presented during 2013-2015 were used in the statistical analysis at 5 % level of significance. …