摘要
试验探讨了静态条件下沸石和草炭对重金属离子的吸附特性和吸附热力学性质。结果表明,重金属钝化剂沸石和草炭中加入重金属溶液(Cu2+、Mn2+、Zn2+、Pb2+、Cd2+)的浓度越大,钝化剂对重金属离子的吸附量越多;不同钝化剂对重金属离子的吸附能力略有不同,草炭>沸石;草炭对重金属的吸附亲和力顺序为Zn2+>Mn2+>Cu2+>Cd2+>Pb2+;沸石的为Zn2+>Cu2+>Mn2+>Cd2+>Pb2+;两种钝化剂对重金属的吸附等温线与Freundlich和Temkin方程均有较好的拟合性,Langmuir方程不适宜描述两种钝化剂对重金属的等温吸附过程,其等温线符合Freundlich吸附等温模型。
The experirment is conducted to study the absorption charcterictics and absorption thermodynamic properties of zeolite and peat to heavy metal under static state condition. The results showed that the larger addition concentration of heavy metals（Cu^2＋, Mn^2＋, Zn^2＋, Pb^2＋, Cd^2＋） in zeolite and peat was, the absorption of heavy metals ions is more; the absorption ability of different passivation reagents on ions of heavy metals had a little difference, peat〉zeolite; the absorption appetency order of peat on heavy metals： Zn^2＋Mn^2＋Cu^2＋Cd^2＋〉Pb^2＋; the order of zeolite： Zn^2＋〉Cu^2＋〉Mn^2＋〉Cd^2＋〉Pb^2＋, both absorption isotherm had better inosculation with Freundlich and Temkin formula, Langmuir formula was unfit to describe the isothermal absorption of both passivation reagents on heavy metals, its isotherm fit the Freundlich isothermal absorption model.
出处
《东北农业大学学报》
CAS
CSCD
2008年第8期53-58,共6页
Journal of Northeast Agricultural University
关键词
钝化剂
等温吸附
重金属
passivator
absorption tested
heavy metals
