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Applied Environmental Research

2020

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Articles 1 - 19 of 19

Full-Text Articles in Social and Behavioral Sciences

Potential Degradation And Kinetics Of Melanoidin By Using Laccase From White Rot Fungus, Wittawat Toomsan, Pinthita Mungkarndee, Sophon Boonlue, Nguyen Thanh Giao, Sumana Siripattanakul-Ratpukdi Sep 2020

Potential Degradation And Kinetics Of Melanoidin By Using Laccase From White Rot Fungus, Wittawat Toomsan, Pinthita Mungkarndee, Sophon Boonlue, Nguyen Thanh Giao, Sumana Siripattanakul-Ratpukdi

Applied Environmental Research

This study was attempted to use laccase extracted from white rot fungus to removemelanoidin in the ethanol production wastewater. The isolated fungus producing the highest laccase was identified as Megaspororiasp. The highest degradation efficiencies of the purified and crude laccases were 48.00% and 44.60%, respectively. Both degradation kinetics well fit Michaelis-Menten model. The Michaelis constant (Km) and maximum rate of reaction (Vmax) were 0.82% melanoidin and 0.0045% melanoidin h-1 for the degradation by the purified laccase and 0.71% melanoidin and 0.0037% melanoidin h-1 for the degradation by the crude laccase. Turnover number (Kcat) of purified and crude laccases were 0.00023 …

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Characterization Of Pm2.5 - Bound Polycyclic Aromatic Hydrocarbons In Chiang Mai, Thailand During Biomass Open Burning Period Of 2016, Duangduean Thepnuan, Somporn Chantara Sep 2020

Characterization Of Pm2.5 - Bound Polycyclic Aromatic Hydrocarbons In Chiang Mai, Thailand During Biomass Open Burning Period Of 2016, Duangduean Thepnuan, Somporn Chantara

Applied Environmental Research

Polycyclic aromatic hydrocarbons (PAHs) bounded to ambient fine particles (PM2.5) were determined for enabling health risk assessment and source identification of ambient aerosols. Daily PM2.5 samples (24 h) were collected on quartz fiber filters by using a low volume air sampler (16.7 L min-1) during smoke haze period (March - April 2016) in Chiang Mai, Thailand. An average concentration of PM2.5(n=54) was 65.3±17.6 μg m-3. The samples were extracted with dichloromethane using ultrasonication prior to PAHs analysis by GC-MS. Average concentrations of 16-PAHs, non-carcinogenic (nc) PAHs and carcinogenic (c) PAHs were 10.23±2.49, 5.48±1.70 and 4.75±1.43 ng m-3, respectively. Ratio values …

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Mpirically Derived Equation From Simple Heat Index For Calculating Wet Bulb Globe Temperature: A Case Study Of Thailand, Wutthichai Paengkaew, Atsamon Limsakul, Rittirong Junggoth, Somsak Pitaksanurat Sep 2020

Mpirically Derived Equation From Simple Heat Index For Calculating Wet Bulb Globe Temperature: A Case Study Of Thailand, Wutthichai Paengkaew, Atsamon Limsakul, Rittirong Junggoth, Somsak Pitaksanurat

Applied Environmental Research

The Wet Bulb Globe Temperature (WBGT) index is a standard for assessing environmental heat stress, but the requirement of expensive instrument with specialized maintenance is limited its use. This study aims to develop the empirical equation to estimate the WBGT from Heat Index (HI) calculated from portable temperature and humidity recorder (THR), based on the data collected at seven sites covering all regions of Thailand. Comparative analysis shows that the HI values calculated from THR (HITHR) are consistent well with those measured from the thermal environmental monitor (HIQT36) as evidenced by a highly positive correlation between them (r=0.97; p<0.01; n=4,303). These results suggest high reliability of the portable THR and its acceptance to be used instead of the standard QT36 device. Based on a simple linear regression developed to estimate WBGT from the HITHR, it was found that the model accounts for at least 90% of the variance of the observed WBGT (dependent variable). In addition, validation of the model with the statistical methods shows relatively small errors of the estimated WBGT values in comparisonto the observed values. With this evidence, the developed empirical regression equation can be used to estimate WBGT with high accuracy and confidence. Simple and easier to use for the practitioners who are involved in public health works at community level, a heat monitoring tool kit consisting of a THR, WBGT chart and recommended actions were further developed based on the results obtained. This tool kit is a low-cost and simple device which can be used by various community-level stakeholders to prevent and reduce heat injuries and deaths of risk groups, especially the elderly. This tool is necessary in light of anthropogenic-induced warming and Thailand's aging society.

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Effect Of Mixture Ratio Of Food Waste And Vetiver Grass On Biogas Production, Mayura Srikanlayanukul, Parinda Suksabye Sep 2020

Effect Of Mixture Ratio Of Food Waste And Vetiver Grass On Biogas Production, Mayura Srikanlayanukul, Parinda Suksabye

Applied Environmental Research

The objectives of this research were to study the optimum percentage ratios of food waste and vetiver grass (Vetiveria zizaniodes(L.) Nash) for biogas production and process stability in anaerobic digestion system. The nine mixture ratios of food waste (FM) and vetiver grass (VG) were 100:0, 80:20, 75:25, 66.67:33.33, 50:50, 33.33:66.67, 25:75, 20:80 and 0:100. The biogas production was subjected to anaerobic batch with working volume of 1.8 L and had digestion time 60 d at 35 ± 2 °C. High specific methane yield of 0.30 L g-1 VS removed was obtained from the fermentation at ratio of FW:VG at 80:20 …

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Assessments Of Nipa Forest Using Landsat Imagery Enhanced With Unmanned Aerial Vehicle Photography, Tantus Piekkoontod, Bhumiphat Pachana, Karnjana Hrimpeng, Kitsanai Charoenjit Sep 2020

Assessments Of Nipa Forest Using Landsat Imagery Enhanced With Unmanned Aerial Vehicle Photography, Tantus Piekkoontod, Bhumiphat Pachana, Karnjana Hrimpeng, Kitsanai Charoenjit

Applied Environmental Research

Nipa palms are exposed by the transformation of land use and land cover changes (LULCC) due to changes to aquaculture and orchards. Modern remote sensing for environmental monitoring of LULCC has been made easier by the use of high spatial resolution images, innovative image processing and Geographic Information Systems (GIS). The expense of high-resolution satellite imagery has resulted in investigators moving to open sources (e.g., Landsat), therefore, the interpretation of images at a medium resolution can be classified simply as LULCC classes and are constrained by the detection of small-scale disturbances. This research applied Landsat imagery with very high-resolution imagery …

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Optimizing The Extraction Of Phenolic Compounds With High Antioxidant Activity From Mango Seed Kernel Wastes Using Response Surface Methodology, Francis D.C Siacor, Camila F.Y. Lobarbio, Evelyn B. Taboada Sep 2020

Optimizing The Extraction Of Phenolic Compounds With High Antioxidant Activity From Mango Seed Kernel Wastes Using Response Surface Methodology, Francis D.C Siacor, Camila F.Y. Lobarbio, Evelyn B. Taboada

Applied Environmental Research

Mango seed kernels (MSK), which are waste streams in the mango processing industry, are good sources of phenolic compounds with high antioxidant, anti-bacterial, and anti-viral properties. These phenolic compounds are reported to have an increasing demand over the years in the quest for healthy ready-to-eat food and nutraceuticals. To recover these compounds from MSK, solid-liquid extraction (SLE) can simply be applied, although there is a knowledge gap in the systematic exploration of this process for mango-based phenolic compounds. In this work, phenolic compounds were extracted from MSK through SLE using ethanol-water solvent system. A statistical-based approach was used to evaluate …

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Analysis And Modeling Of Physiologic Equivalent Temperature Of An Outdoor Environment, Adinife P. Azodo, Salami O. Ismaila, Femi T. Owoeye, Titus Y. Jibatswen Sep 2020

Analysis And Modeling Of Physiologic Equivalent Temperature Of An Outdoor Environment, Adinife P. Azodo, Salami O. Ismaila, Femi T. Owoeye, Titus Y. Jibatswen

Applied Environmental Research

This study developed a model that depicts the relationship, strength, and direction of the causality between the predictor variables (microclimatic variables) and a response variable (ambient temperature) interpreted for the physiologic equivalent temperature of an environment. Data collected were microclimatic variables which include air circulation, relative humidity, mean radiant and ambient temperatures over land cover materials namely tarmac, grass, soil and concrete at the premises of Federal University Wukari, Taraba state of Nigeria at a guided height of 1.1 m. The data was collected using physical measurements with respect to time of the day; morning (8:00 - 9:00 am), afternoon …

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Radar Quality Index For A Mosaic Of Radar Reflectivity Over Chao Phraya River Basin, Thailand, Nattapon Mahavik, Sarintip Tantanee Sep 2020

Radar Quality Index For A Mosaic Of Radar Reflectivity Over Chao Phraya River Basin, Thailand, Nattapon Mahavik, Sarintip Tantanee

Applied Environmental Research

The weather radar is one of the tools that can provide spatio-temporal information for nowcast which is useful for hydro-meteorological disasters warning and mitigation system. The ground-based weather radar can provide spatial and temporal information to monitor severe storm over the risky area. However, the usage of multiple radars can provide more effective information over large study area where single radar beam may be blocked by surrounding terrain Even though, the investigation of the sever storm physical characteristics needs the information from multiple radars, the mosaicked radar product has not been available for Thai researcher yet. In this study, algorithm …

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Phytoplankton-Water Quality Relationship In Water Bodies In The Mekong Delta, Vietnam, Giao Thanh Nguyen, Huynh Thi Hong Nhien May 2020

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, …

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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 May 2020

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 …

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Perception And Behavioral Changes Of Thai Youths Towards The Plastic Bag Charging Program, Sujitra Vassanadumrongdee, Dawisa Hoontrakool, Danny Marks May 2020

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 …

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Health Risk Assessment Of Pesticide Residues In Vegetables From River Basin Area, Supawat Chaikasem, Veerapas Na Roi-Et May 2020

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 …

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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 Jan 2020

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 …

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Evaluating Current Water Quality Monitoring System On Hau River, Mekong Delta, Vietnam Using Multivariate Statistical Techniques, Giao Thanh Nguyen Jan 2020

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 …

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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 Jan 2020

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 …

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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 Jan 2020

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 …

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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 Jan 2020

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 …

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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 Jan 2020

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 …

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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 Jan 2020

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 …

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