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Position: Home > Articles > Study on Absorption of Pb~(2+) by Inorganic Colloid of Brown Desert Soil in Xinjiang Chinese Journal of Soil Science 2009,17 (6) 1284-1287

新疆棕漠土无机胶体对Pb~(2+)的吸附特征研究

作  者:
孙红专;杨剑虹
单  位:
塔里木盆地生物资源保护与利用重点实验室;新疆塔里木大学生物技术研究与开发中心;西南大学资源环境学院
关键词:
棕漠土;无机胶体;Pb2+吸附;支持电解质浓度
摘  要:
本文选用采自新疆阿克苏地区典型的棕漠土壤,用模拟吸附方法研究棕漠土无机胶体在不同阴阳离子作用下对Pb2+的吸附特征,得出:棕漠土无机胶体对铅的等温吸附曲线可以用Langmuir等温方程式很好的拟合,解吸后,铅在胶体内的残余量与加入溶液的浓度呈很好的一次函数关系;随着加入支持电解质浓度的增加,胶体对铅的吸附量逐渐减少;阳离子对土壤无机胶体吸附铅的影响为:K+>NH4+>Na+;阴离子对铅吸附影响为Cl->NO3-。
译  名:
Study on Absorption of Pb~(2+) by Inorganic Colloid of Brown Desert Soil in Xinjiang
作  者:
SUN Hong-zhuan1,2,YANG Jian-hong3(1.Biological Technology Research and Development Center,Tarim University,Xinjiang alaer,843300,China;2.Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin,Xinjiang alaer,843300,China;3.College of Resources and Environment,Southwest University,Chongqing,417706,China.)
关键词:
Brown desert soil;Inorganic colloid;Pb2+ absorption;Electrolyte strength
摘  要:
This paper chose the typical brown desert soil from Aksu,Xinjiang,and studied the absorption of Pb2+ by inorganic colloid.The results were as follows:Isothermal adsorption curve of Pb2+ absorbed by inorganic colloid of brown desert soil could match with Langmuir equation well.After desorption,the relationship between original Pb2+ concentration and remainder Pb2+ content in colloid was a linear function.With the increase of electrolyte strength,the absorption quantity of Pb2+ by colloid decreased gradually.The influence on competitive adsorption of lead decreased in the order of K+,NH4+ and Na+,and the influence of Cl-on lead absorbed by soil colloid outweighed that of NO3-.

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