收稿日期: 2016-01-18
网络出版日期: 2016-04-30
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
Received date: 2016-01-18
Online published: 2016-04-30
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 . DOI: 10.3969/j.issn.1007-2861.2016.01.011
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
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