固定化Aspergillus sp.吸附Cr(Ⅵ)的实验研究  

Study on Biosorption of Cr^(6+) in Solution by Immobilized Aspergillus sp.

作　　者：张慧[1] 李宁[2] 戴友芝[1] 唐受印[3] 

机构地区：[1]湘潭大学环境工程系,湘潭411105 [2]中国石油化工股份有限公司巴陵分公司,岳阳414007 [3]湖南工程学院,湘潭411104

出　　处：《化工进展》2005年第3期322-325,328,共5页Chemical Industry and Engineering Progress

基　　金：湖南省计委资助项目(湘计高计[2001]907号)。

摘　　要：采用包埋法固定Aspergillussp.菌体制备成生物吸附剂,对水中的Cr6+进行吸附实验。通过比较几种不同的固定化载体,发现5%PVA+1%SA为最佳固定载体。还研究了pH值、Cr6+初始浓度、菌体浓度、吸附时间、共存离子等因素对Cr6+吸附的影响,并对Aspergillussp.菌体去除Cr6+的吸附机理进行了探讨。A biologic adsorbent was prepared with immobilized Aspergillus sp. for adsorption of heavy metal ion Cr^6+ from aqueous solution. Several methods for immobilizing biomass were ~compared, in which the method immobilizing Aspergillus sp. with 5%PVA+1%SA as ~entrapment material was considered to be the optimum. The influence factors of its ~adsorption ~ability such as pH value, initial concentration of Cr^6+ , biomass dose, adsorption time and the effect of competitive ion were analyzed.In addition, the mechanism of removing Cr^6+ by ~immobilized Aspergillus sp. biomass was studied.

关 键 词：CR^6+ Cr(Ⅵ) 生物吸附剂 初始浓度 固定化 吸附时间 吸附机理 实验研究 化裁 SA 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]