摘要
应用平衡法研究了除草剂苄嘧磺隆在 8种土壤中的吸附特性 .结果表明 ,土壤对苄嘧磺隆有很强的吸附性 ,且随供试土壤理化性质的差异其吸附性呈明显变化 .苄嘧磺隆在土壤中的吸附符合Fruendlich方程 ,其在土壤中的吸附常数Kf 与土壤有机质、粘粒含量呈显著正相关 (r =0 73 93 和 0 775 1 ,p <0 0 5 ) ,与土壤 pH呈显著负相关 (r=0 70 68 ,p <0 0 5 ) .苄嘧磺隆在土壤上的吸附自由能为 1 1 4 5～ 1 3 3 8kJ/mol。
Adsorption of bensulfuron methyl in eight different soils was studied using the batch equilibration technique. The results showed that soils had strong adsorption of bensulfuron methyl, which, however, varied with the different properties of the soil tested. The isotherm data were fitted to the Frenundlich equation. The K \-f values increased with increasing organic matter and clay content of the soils and decreased with increasing pH. The correlative coefficient between K f values and organic matter and clay content and pH were 0 7393 *, 0 7751 *, 0 7068 *, p <0 05, respectively. The free energy of sorption ( ΔG ) ranged from 11 45 to 13 38kJ/mol indicates the spontaneity of the given sorption process of bensulfuron methyl in soils.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第3期122-125,共4页
Environmental Science
基金
安徽省自然科学基金重点项目(0 0 0 2 3 0 69)
安徽省高等学校青年教师科研项目(2 002jq118)
中国科学院红壤生态开放实验站基金资助
关键词
苄嘧磺隆
吸附
土壤
bensulfuron methyl
adsorption
soil
