摘要
利用平衡吸附法研究了3种土壤矿物对苄嘧磺隆的吸附及尿素对吸附的影响。结果表明,3种土壤矿物对苄嘧磺隆的吸附符合Langmuir和Freundlich方程,非晶形氧化铝对苄嘧磺隆的最大吸附量最高,为634.5μg/g;针铁矿的最大吸附量为225.9μg/g;高岭土对苄嘧磺隆的最大吸附量最小,为188.9μg/g。尿素的加入使得苄嘧磺隆在非晶形氧化铝、针铁矿表面的吸附量都有不同程度的下降,其中非晶形氧化铝降低的幅度最大;但尿素和苄嘧磺隆同时添加或者先加尿素再加苄嘧磺隆,高岭土对苄嘧磺隆的吸附量都增大。
Adsorption of bensulfuron-methyl by kaolinite,goethite and amorphous alumina and the effect of urea on the adsorption were examined by equilibrium adsorption method.Results indicated that the adsorption was in accordance with Langmuir equation,with the maximum absorbing capacities ranking as amorphous alumina（634.5 μg / g）,goethite（225.9 μg / g）,kaolinite（188.9 μg / g）.When urea was added in the adsorption system,the absorbing capacities of goethite and amorphous alumina to bensulfuron-methyl decreased whatever the addition order of urea and bensulfuron-methyl was.However,when urea was added before or simultaneously with bensulfuron-methyl in suspension of kaolinite,the adsorption quantity of bensulfuron-methyl was increased.
出处
《湖北农业科学》
北大核心
2012年第3期485-489,共5页
Hubei Agricultural Sciences
基金
湖北省教育厅科学研究重点项目(D20092702)
关键词
苄嘧磺隆
吸附
土壤矿物
尿素
bensulfuron-methyl
adsorption
soil minerals
urea
