摘要
报导用聚丙烯酰胺固定化酵母菌细胞去除Ｃｄ２＋的研究。用化学和电镜分析法研究了去除和解吸回收Ｃｄ２＋的最佳条件及去除机理，并推荐了去除电镀废水中Ｃｄ２＋的工艺流程。结果表明：在ｐＨ９，Ｃｄ２＋浓度为１～４００ｍｇ／Ｌ，反应１ｈ，固定化细胞对Ｃｄ２＋的去除率９８．９％；未固定化细胞为３７．６％。分别用０．１ＭＨＣＩ和０．１ＭＥＤＴＡ解吸，Ｃｄ２＋的回收率为８８．５％和８７．６％。酵母菌对Ｃｄ２＋的累积作用主要是胞外器官的表面吸附，并伴有络合、螯合及絮凝作用。本法可用于电镀含Ｃｄ２＋的废水的治理。
The removal of Cd2+ by Kloeckera apiculata Strains immobilized with polyactylamide have been studied.Inculded are the studies aimed at elucidating the basic mechanism and the optimum conditions of Cd2+ removal and desorption recovery with analytical methods of chemical and electron microscope.The process showed that 98.9% of Cd2+ could be removed by the immobilized cells at pH9,Cd2+ from 1 to 400mg/L,reaction 1h,but free cells only 37.6%.The recovery of Cd2+ was 88.5% and 87.6% by 0.1M HCI and 0.1M EDTA respectively.The sorption mechanism was mainly due to the sorption of cells wall and flocculation were also observed.
出处
《重庆环境科学》
1996年第3期16-19,共4页
Chongqing Environmental Science
