摘要
研究了浮游球衣菌(Sphaerotilus natans)在不同吸附条件下对溶液中Pb2+、Cu2+、Zn2+、Cd2+的吸附规律。结果表明,Sphaerotilus natans对这4种重金属离子均有一定的吸附作用,并在20min内达到吸附平衡,pH对吸附过程影响较大,pH为5.5时Sphaerotilus natans对这4种金属离子的吸附效果最好,Sphaerotilus natans对它们的吸附选择性为Pb2+>Cu2+>Zn2+>Cd2+,Pb2+、Cu2+能部分置换出已被菌体吸附的Zn2+、Cd2+。HCl和EDTA溶液可有效地将金属离子从菌体上解吸下来,解吸后的菌体可重复使用。
The biosorption of Sphaerotilus natan to the heavy metal ions such as Pb^2＋ , Cu^2＋ , Zn62＋ and Cd^2＋ was studied. The results showed that Sphaerotilus natans had a certain adsorbing effect on the heavy metal ions of copper, lead, zinc and cadmium. The process of adsorption reaches equilibrium in 20 minutes. The pH value of the solution has a great effect on the adsorption. Sphaerotilus natans showed the best adsorbing effect to the above four kinds of heavy metals ions at pH 5.5. The sequence of the adsorption selectivity of Sphaerotilus natans to the heavy metal ions was Pb^2＋ 〉Cu^2＋ 〉 Zn^2＋ 〉Cd^2＋. Pb^2＋ and Cu^2＋ can partially replace Zn^2＋ and Cd^2＋ adsorbed by Sphaerotilus natans. HCI and EDTA can desorb the heavy metal ions from the bacteria effectively and the bacteria can be reused.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2005年第9期648-650,共3页
Environmental Pollution & Control
基金
吉林省科技发展计划资助项目(No.20050505)。
关键词
浮游球衣菌
重金属离子
吸附特性
Sphaerotilus natans Heavy metal ions Adsorption character
作者简介
秦玉春，女，1966年生，博士研究生，副教授，研究方向为环境微生物。
通讯联系人。
