摘要
应用批量平衡法和连续脱附法研究了农药西维因在3种土壤和含草木灰土壤中的吸附/脱附行为.结果表明:吸附/脱附等温线均能用Freundlich模型较好拟合(R2>0.96).西维因在土壤中的分配系数与土壤有机质含量呈正相关性.随草木灰添加量的增加,土壤对农药的吸附能力明显提升,吸附等温线的非线性程度也相应变大,同时脱附的迟滞现象也愈明显.土壤中草木灰添加量质量比大于0.2%时,草木灰对西维因吸附总量的贡献是主要的.吸附剂孔变形是造成脱附迟滞现象的主要原因.
The sorption/desorption of carbaryl in three Chinese soils and char-amended soils has been studied using batch sorption and successive desorption methods. The results showed that Freundlich model fitted well with sorption/desorption isotherms （R2〉 0. 96）. The partition coefficient of carbaryl in soils was correlated positively with the contents of the soil organic matters. The increase in the amount of char in soils causes the enhanced nonlinear sorption of pesticides and the distinct sorption/desorption hysteresis. Biochar was considered to be the primary contributor to carbaryl sorption when soil amended with 〉 0. 2% biochar Pore deformation on adsorbent is the primary reason for sorption/desorption hysteresis.
出处
《浙江工业大学学报》
CAS
2012年第6期591-594,共4页
Journal of Zhejiang University of Technology
基金
国家自然科学基金资助项目(21177113)
浙江省自然科学基金资助项目(Y5110268)
关键词
西维因
土壤
草木灰
吸附
脱附
carbaryl
soil
char
adsorption
desorption
