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Adsorption Characteristics and Influencing Factors of Chlorimuron‐Ethyl in Two Typical Chinese Soils
Author(s) -
Ren Wenjie,
Wang Meie,
Zhou Qixing
Publication year - 2011
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2010.0228
Subject(s) - adsorption , organic matter , chemistry , freundlich equation , soil water , langmuir , environmental chemistry , inorganic chemistry , soil science , geology , organic chemistry
The adsorption of chlorimuron‐ethyl in two typical northeastern Chinese soils before and after removal of organic matter and removal of organic matter plus iron/aluminum oxides was investigated using batch equilibrium methods, and the effect of pH on the adsorption was also evaluated. The adsorption kinetics were fitted well with the Elovich and pseudo‐second‐order kinetic models ( R 2 = 0.973–0.985) and the adsorption isotherms conformed to the Linear, Freundlich, and Langmuir models ( R 2 > 0.963). The mineral fraction appeared to dominate adsorption of chlorimuron‐ethyl in brown earth (BE; Alfisols), while organic matter was the major component for the adsorption in black soil (BS; Mollisols). The adsorption of chlorimuron‐ethyl in the original and treated soils all decreased with increasing pH. Moreover, the effect of pH on the adsorption of chlorimuron‐ethyl in soil minerals was stronger than that in organic matter at acidic conditions.