Measurement of Atrazine Adsorption onto Surficial Sediments (Natural Surface Coatings)——New Evidence

来源 :高等学校化学研究(英文版) | 被引量 : 0次 | 上传用户:fazaizhaoyun
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
To reveal the relative contribution of the components, Fe, Mn oxides or organic materials(OMs) in the surficial sediments(SSs), and the natural surface coating samples(NSCSs) to adsorbing atrazine(AT), a selective chemical extraction technique was employed, to remove the different components, and the adsorption characteristics of AT on the SSs and the NSCSs were investigated. The observed adsorptions of AT on the original and extracted SSs and NSCSs were analyzed by nonlinear least squares fitting(NLSF) to estimate the relative contribution of the com-ponents. The results showed that the maximum adsorption of AT on the NSCSs was greater than that in the SSs, be-fore and after extraction treatments, implying that the NSCSs were more dominant than the SSs for organic pollutant adsorption. It was also found that the Fe oxides, OMs, and residues in SSs(NSCSs) facilitated the adsorption of AT, but Mn oxides directly or indirectly restrained the interaction of AT with SSs(NSCSs) particles. The contribution of the Fe oxides to AT adsorption was more than that of OMs; the greatest contribution to AT adsorption on a molar ba-sis was from the Fe oxides in the nonresidual fractions, indicating that the Fe oxides played an important role in con-trolling the environmental behavior of AT in an aquatic environment.
其他文献
This paper demonstrates an atmospheric correction method to process MODIS/Aqua (Moderate-resolution Imaging Spectroradiometer) ocean color imagery over turbid c
Dissolved organic matter (DOM) has been identified as precursor for disinfection by-product (DBPs) formation during chlorination. Recently, it has been demonstr
HTML帮助文件是目前流行的风格,其主题内容是HTM文件,支持多种图像和组件.与Winhelp文件相比,HTML文件更容易创建,更方便使用.介绍了创建HTML帮助文件的一般步骤与方法.
Biofilms grown inside two sewage collecting pipes located in industrial and residential areas are studied. Bacterial biomass inside three layers of biofilms was
Adsorption and desorption of carbon dioxide, methane and other gases on coals has been investigated experimentally using representative Zhongliangshan coals. Ga
Fluidized pellet bed (FPB) has been successfully applied in water and wastewater treatment. However, the removal mechanism of contaminants especially the solubl
A bacterial strain that utilized o-chloronitrobenzene (o-CNB) as the sole carbon, nitrogen and energy sources was isolated from an activated sludge collected fr
Nano-Al13 was separated and purified by four methods to investigate its characteristic. Nano-Al13 was analyzed by Al-Ferron timed complexation spectrophotometer
A field-scale aged refuse (AR) biofilter constructed in Shanghai Refuse Landfill, containing about 7 000 m3 aged refuse inside, was evaluated for its performanc
The UF membrane with molecular weight cutoff (MWCO) ranging from 2 kDa to 100 kDa and XAD-8 resin were employed to identify the characteristic of molecular weig