%0 Journal Article
%T Adsorption mechanism of Pb2+ and Cd2+ on diatomite in liquid/solid systems<br>液/固体系中硅藻土对Pb2+和Cd2+的吸附机制
%A Zhu Jian
%A Wang Ping
%A Lei Mingjing
%A Zhang Ye
%A Zhang Weili
%A <br>朱健
%A 王平
%A 雷明婧
%A 张烨
%A 张伟丽
%J 环境工程学报
%D 2012
%I 
%X In order to promote application levels of diatomite in treatment of wastewater containing heavy metals, adsorption influencing factors, isotherms, kinetics of Pb2+ and Cd2+ on diatomite were studied by static adsorption experiment in liquid/solid systems. The results showed that adsorption quantity of Pb2+ and Cd2+ on diatomite will enlarge as decrease of diatomite dose and increase of ion initial concentration, pH, adsorption time. Adsorption isotherms of Pb2+ and Cd2+ on diatomite were both consistent with Langmuir model. The maximum adsorption quantities of Pb2+ and Cd2+ were 10.428 mg/g and 7.916 mg/g, respectively. The adsorption property of Pb2+ on diatomite was better. Hydration energy of Pb2+ was lower, so Pb2+ can take off water film smoothly, and get into diatomite channels to react with active groups easily. Two-constant equation can indicate adsorption kinetics of Pb2+ and Cd2+ on diatomite well, adsorption rate of Cd2+ on diatomite is higher.
%K diatomite
%K Pb2+
%K Cd2+
%K adsorption influencing factors
%K adsorption isotherm
%K adsorption kinetic<br>硅藻土
%K Pb2+
%K Cd2+
%K 吸附影响因素
%K 吸附等温线
%K 吸附动力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=37D4B66310E46B835711FD451D795CD3&yid=99E9153A83D4CB11&vid=B31275AF3241DB2D&iid=708DD6B15D2464E8&sid=5E3E3304E85F8B42&eid=1BD979F59C3127D2&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=20