Air Pollutant Emissions From The Burning Of Incense, Mosquito Coils, And Candles In A Small Experimental Chamber,
2010
Chulalongkorn University
Air Pollutant Emissions From The Burning Of Incense, Mosquito Coils, And Candles In A Small Experimental Chamber, Maneerat Ongwandee, Wilas Pipithakul
Applied Environmental Research
Combustion of incense, candles, and mosquito coils produces a variety of air pollutants, which may cause adverse health effects. This study was to characterize emissions of particulate matter (PM2.5) and carbon monoxide (CO) from the burning process of three selected types of emitters: incense, candles, and mosquito coils. The experiments were conducted in an aluminum foil-lined wall chamber with a dimension of 1x1x1 m3. Emission rates and emission factors of the test emitters were obtained from fitting time-dependent concentrations of the measured pollutants to a single-compartment mass balance model. The emission rates and emission factors of incense combustion were: PM2.5 …
Inter-Phase Mass Transport: Modelling Of Air-Water Movement Of Organic Chemicals,
2010
Chulalongkorn University
Inter-Phase Mass Transport: Modelling Of Air-Water Movement Of Organic Chemicals, Darryl Hawker, Benjalak Karnchanasest
Applied Environmental Research
Air-water inter-phase mass transport of organic contaminants is often an important factor in their environmental fate and behaviour. The equilibrium situation is given by the Henry's Law Constant of the compound, but is rarely attained under environmental conditions. Approach to equilibrium is commonly described by the two-film theory involving molecular (Fickian) diffusion through thin stagnant films adjacent to the air-water interface. This theory is formulated in terms of mass transfer coefficients and fugacity transport parameters. Penetration and Surface Renewal Theories of mass transfer are also discussed. The importance of the Henry's Law Constant (H) is shown. Compounds such as phenol …
Durian Peel As Biosorbent For Removal Of Cadmium Ions From Aqueous Solution,
2010
Chulalongkorn University
Durian Peel As Biosorbent For Removal Of Cadmium Ions From Aqueous Solution, Wanna Saikaew, Pairat Kaewsarn
Applied Environmental Research
The ability of durian peel to remove Cd(II) ions from aqueous solution by biosorption was investigated. The sorption capacities at different solution pH, agitation speed, temperatures, initial cadmium ions concentrations and contact time were evaluated on a batch scale basis. At pH 5 and agitation speed 150 rpm, the cadmium ions removal reached at a maximum value. Increases in cadmium capacity with increasing temperature indicated endothermic nature of the biosorption process. The equilibrium was better described by the Langmuir isotherm model, with a maximum biosorption capacity of 18.55 mg g-1. The biosorption was relatively quick about 15 min to reach …
Suppression Of Pyrite Oxidation With Iron-Phosphate Coating: Technique For Prevention Of Acid Mine Drainage,
2010
Chulalongkorn University
Suppression Of Pyrite Oxidation With Iron-Phosphate Coating: Technique For Prevention Of Acid Mine Drainage, Chantra Tongcumpou, Nipon Kongmak, Chakkaphan Sutthirat
Applied Environmental Research
This study was aimed to evaluate the feasibility of an iron-phosphate coating on pyrite surfaces for inhibiting an oxidation that is expected to prevent acid mine drainage (AMD). Prior to the experiments, pyrite samples (av. 425-850 µm in size) were mixed with sand (av. 1-2 mm in size) with a ratio of 1:4. Coating process was conducted in batch experiments that were treating with various concentrations of coating solutions, i.e., hydrogen peroxide (H2O2), sodium acetate (NaAc) and potassium dihydrogen phosphate (KH2PO4) at different contact times. Subsequently, leaching test was performed in columns (10 mm in diameter) using 0.145 M of …
