TY - JOUR
T1 - Adsorption of pentachlorophenol by natural soils
AU - Christodoulatos, Christos
AU - Korfiatis, George P.
AU - Talimcioglu, Nazmi M.
AU - Mohiuddin, Mohammed
PY - 1994/6/1
Y1 - 1994/6/1
N2 - The adsorption of pentachlorophenol, a listed hazardous substance, by natural soils was investigated at pH values of 4, 7, and 10 using various soils collected from the surface horizon. The effects of soil properties, such as organic carbon and fines content, were also studied and were found to have a significant positive correlation with the amount of solute adsorbed. Although soil properties strongly influence the process, the pH of the soil-water system was found to be a primary factor which determines the affinity of solute for the soil particle surface. Pentachlorophenol, a weak organic acid, is transformed to pentachlorophenate ion at pH higher than pKaand adsorption is reduced. The anionic form of the molecule was found to be much more hydrophilic than the neutral form resulting in a two orders of magnitude reduction of the adsorption capacity as the pH was elevated from 4 to 10. The presence of cosolvents had a negative effect on the process leading to substantial reductions in the adsorption capacity of the soils.
AB - The adsorption of pentachlorophenol, a listed hazardous substance, by natural soils was investigated at pH values of 4, 7, and 10 using various soils collected from the surface horizon. The effects of soil properties, such as organic carbon and fines content, were also studied and were found to have a significant positive correlation with the amount of solute adsorbed. Although soil properties strongly influence the process, the pH of the soil-water system was found to be a primary factor which determines the affinity of solute for the soil particle surface. Pentachlorophenol, a weak organic acid, is transformed to pentachlorophenate ion at pH higher than pKaand adsorption is reduced. The anionic form of the molecule was found to be much more hydrophilic than the neutral form resulting in a two orders of magnitude reduction of the adsorption capacity as the pH was elevated from 4 to 10. The presence of cosolvents had a negative effect on the process leading to substantial reductions in the adsorption capacity of the soils.
KW - Adsorption
KW - Nonlinear Isotherms
KW - Pentachlorophenol
KW - Soils
UR - http://www.scopus.com/inward/record.url?scp=0028180790&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028180790&partnerID=8YFLogxK
U2 - 10.1080/10934529409376081
DO - 10.1080/10934529409376081
M3 - Article
AN - SCOPUS:0028180790
SN - 1077-1204
VL - 29
SP - 883
EP - 898
JO - Journal of Environmental Science and Health. Part A: Environmental Science and Engineering and Toxicology
JF - Journal of Environmental Science and Health. Part A: Environmental Science and Engineering and Toxicology
IS - 5
ER -