title: Adsorption behavior of herbicide butachlor on typical soils in China and humic acids from the soil samples.
abstract: Three kinds of soils in China, krasnozem, fluvo-aquic soil, and phaeozem, as well as the humic acids (HAs) isolated from them, were used to adsorb the herbicide butachlor from water. Under the experimental conditions, the adsorption amount of butachlor on soils was positively correlated with the content of soil organic matter. HAs extracted from different kinds of soils had different adsorption capacity for the tested herbicide, which was positively correlated with their content of carbonyls. The adsorption mechanism was studied using Fourier transform infrared spectroscopy and cross-polarization with magic angle spinning 13C nuclear magnetic resonance (CP-MAS 13C NMR) techniques. It was showed that the adsorption mainly took place on the C=O, phenolic and alcoholic O-H groups of HAs. It was also confirmed that the adsorption mechanism was hydrogen bonds formation between the above groups of HAs and butachlor molecules.
authors.affiliation: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China.
authors.forename: Duanping
authors.initials: D
authors.lastname: Xu
authors.forename: Zhonghou
authors.initials: Z
authors.lastname: Xu
authors.forename: Shuquan
authors.initials: S
authors.lastname: Zhu
authors.forename: Yunzhe
authors.initials: Y
authors.lastname: Cao
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Du
authors.forename: Qingbao
authors.initials: Q
authors.lastname: Gu
authors.forename: Fasheng
authors.initials: F
authors.lastname: Li
mesh_terms: D000083:Acetanilides / Q000032:analysis*; D002273:Carcinogens / Q000032:analysis; D002681:China; D006540:Herbicides / Q000032:analysis*; D006812:Humic Substances / Q000032:analysis*; D012987:Soil / Q000032:analysis*
chemical_list: D000083:Acetanilides; D002273:Carcinogens; D006540:Herbicides; D006812:Humic Substances; D012987:Soil; C054409:butachlor