摘要
采用批量平衡法研究了铜在两种土壤中的吸附行为,并探讨了噻吩磺隆对铜在两种土壤中吸附的影响.结果表明:铜与噻吩磺隆共存在土壤中的吸附可用Freundlich方程来描述,铜在两种土壤中的吸附常数Kf值在12.80～72.11之间,这说明铜在土壤中的吸附性较强,随着噻吩磺隆浓度的增加,Kf增大而n减小.铜在两种土壤中的吸附动力学可用准一级动力学方程描述,相关系数R2>0.99.噻吩磺隆的加入使准一级动力学方程的两个参数变小.pH对土壤吸附铜的影响比较复杂,与土壤的理化性质有关.
Batch equilibrium adsorption was conducted to study the adsorption of copper in two tested soils and the influence of thifensulfuron on adsorption of copper was probed in soils.The results showed all of the adsorption isotherms of copper in the absence and presence of thifensulfuron in two tested soils could be described by Freundlich equation,adsorption coefficients(Kf)ranged from12.80 to 72.11,the Freundlich parameter Kfincreased with increasing concentration of thifensulfuron,but the Freundlich parameter n changed adversely.The extent of adsorption of copper in soils is as follow:rice soil > black soil.Copper was a strong adsorption metal in the tested soils.In kinetic modeling,the pseudo-first order equation was considered as the most celebrated model(R2 > 0.99),k1 and Qe of pseudo-first order equation in copper was depressed in the presence of thifensulfuron.Influence of pH on the adsorption of copper was highly relevant to soil characteristics.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期96-100,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
"973"国家重点基础研究发展计划资助项目(2007CB407302)
大连民族学院青年基金(2008A101)
大连民族学院自主科研青年基金资助项目(DC110315)
关键词
铜
噻吩磺隆
吸附
土壤
copper
thifensulfuron
adsorption
soil
