期刊论文

Dynamic adsorption of Pb~(2+) in aqueous solutions ontoa composite adsorbent consisting ofpeanut shell and aspergillus oryzae

Wu, Xiao-Fu(wuxiaofu530911@vip.163.com)

中文

中国环境科学

1000-6923

2016

36

11

3368-3375

10.3969/j.issn.1000-6923.2016.11.021

(2012GS430203):国家“十二五”科技惠民计划项目 (2012BAC09B03):国家“十二五”科技支撑计划项目 :湖南省环境科学与工程重点学科建设项目资助 (CX2015B29):中南林业科技大学研究生科技创新基金资助项目 (CX2015B306):湖南省研究生科研创新项目

本校为第一且通讯机构

为了提高生物质吸附重金属离子的能力,以花生壳(PS)与耐铅米曲霉菌(HA)为原料制备了复合吸附剂(PSH),通过静态与动态吸附试验考察了PSH在不同操作条件下对Pb~(2+)的动态吸附特性.结果表明,PSH较PS的动、静态吸附能力均明显提升, PSH的动态吸附穿透时间随柱高增加或流速、初始浓度的减小而增加,传质区长度随柱高减小或流速、初始浓度的增加而增加,流速变化对穿透时间和传质区长度影响最大.Thomas模型较好的描述了PSH对Pb~(2+)的动态吸附过程(R 2>0.95),说明该过程中内部扩散和外部扩散并非限速步骤.BDST模型准确预测了PSH吸附柱高度与不同时间点浓度c_t与起始浓度c_0的之比、不同流速和初始浓度下...

In order to improve the ability of peanut shell powders (PS) used as bio-adsorbent to remove heavy metal ions, an isolated Pb2+-resistant strain, Aspergillus oryzae (HA), was mixed with peanut shell powders to form a composite adsorbent (PSH). Static and dynamic adsorption experiments were carried out todetermine the adsorption capacity of Pb2+ions onto both PS and PSH in aqueous solutions. The effects of the fixed adsorption bed height, flow rates and initial Pb2+ionconcentration on adsorption behaviors of PSH were investigated. The results from the study indicated that the adsorption capacit...