下蜀黄土对重金属Zn^(2+)的吸附性能

Adsorptive performances of Xiashu loess for zinc ion

卫生填埋目前是我国固废物处理的主要方式,衬垫层是填埋场系统的关键部位.填埋场渗滤液中Zn2+含量较多,是主要污染物之一.以南京地区广泛分布的下蜀黄土为研究对象,通过吸附试验,分析了不同土样对Zn2+的吸附能力.试验发现下蜀黄土对Zn2+的吸附存在一个最大容量,最大吸附容量约为80 mg/g,提出了吸附量的线性-最大吸附方程.

Landfill is a main method for solid waste disposition in our country now. landfill field construction. It contains a large amount of zinc ion in landfill leachate, pollutants. Xiashu loess existed in Nanjing area was chosen as a study object. The The landfill liner is a and the zinc ion is one adsorptive abilities of key part in of the major the different Xiashu loesses for zinc ion were analyzed. A maximum zinc ion adsorption capacity of about 80 mg/g was found for certain Xiashu loess. The linear maximum adsorption equation of adsorption capacity and input mass concentration was established. Experimental results show that the equation can describe the ion adsorptive ability of the clay.