水土保持通报2012，Vol.32Issue(5)：128-131,230,5.
土壤对铜的吸附-解吸特征及对土地利用的响应
Characteristics of Copper Adsorption-Desorption by Soils and Its Responses to Land Use
摘要
Abstract
The characteristics of Cu2+adsorption—desorption by soils in the Yellow River Delta were studied using isothermal equilibrium adsorption method.Differences in the adsorption—desorption capacity of soils in farmland and unused land were compared and the reasons for the differences were analyzed.Results showed that the adsorption capacity for the two types of soils increased with Cu2+ equilibrium concentration.The adsorption characteristics could be simulated by Langmiur,Freundlich and Temkin models.Langmuir model was found to be the best one.The maximum adsorption capacity of soil was 3 961 mg/kg for farmland and 3 521 mg/kg for unused land,respectively.The Cu2+ adsorption capacity of soil in farmland was much higher than that in unused land.The Cu2+ desorption capacity was far lower than the Cu2+ adsorption capacity.There was an obvious lag period of the Cu2+ desorption by soil in unused land,as compared with that in farmland.The Cu2+ desorption ratio for soil in unused land was greater than that in farmland,and the desorption ratio was between 0.1% and 0.35% in farmland and between 0.15% and 1.8% in unused land,respectively.The results from the comprehensive analysis suggest that the differences in the adsorption—desorption for the two types of soils are related with soil organic matter content which leads to more adsorption points on the soil colloid surface in farmland.关键词
铜/吸附—解吸/土壤/土地利用/黄河三角洲Key words
copper/adsorption-desorption/soil/land use/Yellow River Delta分类
农业科技引用本文复制引用
刘庆,赵西梅,舒龙,陆兆华..土壤对铜的吸附-解吸特征及对土地利用的响应[J].水土保持通报,2012,32(5):128-131,230,5.基金项目
山东省高等学校科研发展计划项目“黄河三角洲典型农田土壤重金属的环境行为研究” （）
山东省青年科学家奖励基金项目 （）
滨州学院重大课题 （）
