壳聚糖稳定纳米零价铁对土壤中Cr(Ⅵ)的去除

doi:10.3969/j.issn.1007-2861.2016.01.011

上海大学学报(自然科学版) ›› 2016, Vol. 22 ›› Issue (2): 203-210.doi: 10.3969/j.issn.1007-2861.2016.01.011

壳聚糖稳定纳米零价铁对土壤中Cr(Ⅵ)的去除

严丽君1,2, 刘茉莉1, 胡雪峰1

1. 上海大学环境与化学工程学院, 上海200444;
2. 上海大学循环经济研究院, 上海200072

收稿日期:2016-01-18 出版日期:2016-04-30 发布日期:2016-04-30
通讯作者: 严丽君(1970—), 女, 副教授, 博士, 研究方向为纳米光催化材料. E-mail: ljyan@shu.edu.cn
作者简介:严丽君(1970—), 女, 副教授, 博士, 研究方向为纳米光催化材料. E-mail: ljyan@shu.edu.cn
基金资助:
国家自然科学重点基金资助项目(41130526); 国家自然科学基金资助项目(41471174); 上海大学长江学者和创新团队发展计划资助项目(IRT13078)

Removal of Cr(Ⅵ) in soil by chitosan stabilized nanoscale zero iron

YAN Lijun1,2, LIU Moli1, HU Xuefeng1

1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
2. Academy of Recycling Economy, Shanghai University, Shanghai 200072, China

Received:2016-01-18 Online:2016-04-30 Published:2016-04-30

摘要/Abstract

摘要：

研究了壳聚糖稳定纳米零价铁对土壤中Cr(Ⅵ) 的去除效果. 实验结果表明: 去除效率随零价铁投加量的增加而增大, 最大去除效率达95.9%, 是100目铁屑去除效率的6倍; 土壤pH值和土壤中Cr(Ⅵ)的初始含量与去除效率成反比; 零价铁对土壤中Cr(Ⅵ)的去除是吸附作用与还原作用共同发生的结果; 纳米零价铁对Cr(Ⅵ)的还原过程符合伪一级反应动力学,其表观速率常数kobs为0.016/min.

关键词: 壳聚糖 , , , Cr(Ⅵ) , 纳米零价铁, 土壤

Abstract:

Removal efficiency of Cr(Ⅵ) in soils by chitosan stabilized nanoscale zero-valent iron was studied. Experimental results showed that the removal efficiency increased with zero-valent iron dosage. The maximum removal efficiency was 95.9%, six times of 100 mesh iron filing. The initial concentration of Cr(Ⅵ) in soil and pH value were all inversely proportional to the removal efficiency. Removal of Cr(Ⅵ) in soils by zero-valent iron was a result of the interaction of adsorption and reduction. The reduction process of nanoscale zero-valent iron accorded with pseudo first-order reaction kinetics, and the apparent rate constant kobs was 0.016/min.

Key words: chitosan , Cr(Ⅵ) , nanoscale zero-valent iron, soil

严丽君1,2, 刘茉莉1, 胡雪峰1. 壳聚糖稳定纳米零价铁对土壤中Cr(Ⅵ)的去除[J]. 上海大学学报(自然科学版), 2016, 22(2): 203-210.

YAN Lijun1,2, LIU Moli1, HU Xuefeng1. Removal of Cr(Ⅵ) in soil by chitosan stabilized nanoscale zero iron[J]. Journal of Shanghai University（Natural Science Edition）, 2016, 22(2): 203-210.

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壳聚糖稳定纳米零价铁对土壤中Cr(Ⅵ)的去除

Removal of Cr(Ⅵ) in soil by chitosan stabilized nanoscale zero iron

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