壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素

张娜; 耿兵; 李铁龙; 金朝晖

环境化学

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张娜, 耿兵, 李铁龙, 金朝晖. 壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素[J]. 环境化学, 2010, 29(2): 290-294.

引用本文:

张娜, 耿兵, 李铁龙, 金朝晖. 壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素[J]. 环境化学, 2010, 29(2): 290-294.

ZHANG Na, GENG Bing, LI Tie-long, JIN Zhao-hui . EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON[J]. Environmental Chemistry, 2010, 29(2): 290-294.

Citation:

ZHANG Na, GENG Bing, LI Tie-long, JIN Zhao-hui . EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON[J]. Environmental Chemistry, 2010, 29(2): 290-294.

壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素

1.
南开大学环境科学与工程学院, 天津, 300071;
2.
环境污染过程与基准教育部重点实验室, 南开大学, 天津, 300071
基金项目:
天津市自然科学基金重点项目(07JCZDJC01800)

教育部博士点新教师基金资助(20070055053)

EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON

1.
College of Environmental and Science and Engineering, Nankai University, Tianjin, 300071, China;
2.
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin, 300071, China
Fund Project:

摘要: 以壳聚糖为稳定剂,制备纳米零价铁颗粒,TEM表征结果显示:其粒径分布范围为20—150nm,平均粒径为82.4nm.研究表明,壳聚糖稳定的纳米铁去除Cr(Ⅵ)的还原反应符合一级反应动力学方程.溶液中投加稳定剂壳聚糖,当壳聚糖浓度为150mg·l-1时,80min内表观一级动力学常数kobs约为空白溶液的2倍;干扰离子Ca2+,Mg2+,HCO3-和CO32-对壳聚糖稳定纳米铁去除Cr(Ⅵ)的批试验结果显示,Ca2+和Mg2+在80min内使壳聚糖稳定纳米铁对Cr(Ⅵ)去除率分别降低了约20%和10%;HCO3-和CO32-的存在使去除率降低了约10%.
- 纳米铁 /
- 地表水 /
- 六价铬 /
- 影响因素
Abstract: Nanoscale zero-valent iron was synthesized using chitosan as a stabilizer.The results of TEMshow that the size of the zero-valent iron ranges from 20 nm to 150 nm,with a mean partical size of 82.4 nm.The rate of reduction of Cr(Ⅵ)can be modelled by a pseudo-first-order reaction kinetics equation.When the concentration of chitosan is 150 mg·l-1 the first-order kinetic constant(kobs)is about twice of the contorl.The existence of Ca2+ and Mg2+ decreased the Cr(Ⅵ)removal efficiency of zero-valent iron about 20% and 10%,respectively.HCO3- and CO32- decreased the Cr(Ⅵ)removal efficiency of zero-valent iron by about 10%.
- nanoscale zero-valent iron /
- surface water /
- hexavalent chromium /
- influential factors

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张娜, 耿兵, 李铁龙, 金朝晖. 壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素[J]. 环境化学, 2010, 29(2): 290-294.

引用本文:

张娜, 耿兵, 李铁龙, 金朝晖. 壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素[J]. 环境化学, 2010, 29(2): 290-294.

Citation:

壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素

1. 南开大学环境科学与工程学院, 天津, 300071;
2. 环境污染过程与基准教育部重点实验室, 南开大学, 天津, 300071

收稿日期: 2009-02-26

基金项目:

天津市自然科学基金重点项目(07JCZDJC01800)

教育部博士点新教师基金资助(20070055053)

关键词:

纳米铁 /
地表水 /
六价铬 /
影响因素

摘要: 以壳聚糖为稳定剂,制备纳米零价铁颗粒,TEM表征结果显示:其粒径分布范围为20—150nm,平均粒径为82.4nm.研究表明,壳聚糖稳定的纳米铁去除Cr(Ⅵ)的还原反应符合一级反应动力学方程.溶液中投加稳定剂壳聚糖,当壳聚糖浓度为150mg·l-1时,80min内表观一级动力学常数kobs约为空白溶液的2倍;干扰离子Ca2+,Mg2+,HCO3-和CO32-对壳聚糖稳定纳米铁去除Cr(Ⅵ)的批试验结果显示,Ca2+和Mg2+在80min内使壳聚糖稳定纳米铁对Cr(Ⅵ)去除率分别降低了约20%和10%;HCO3-和CO32-的存在使去除率降低了约10%.

English Abstract

EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON

1. College of Environmental and Science and Engineering, Nankai University, Tianjin, 300071, China;
2. Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin, 300071, China

Received Date: 2009-02-26

Fund Project:

Keywords:

Abstract: Nanoscale zero-valent iron was synthesized using chitosan as a stabilizer.The results of TEMshow that the size of the zero-valent iron ranges from 20 nm to 150 nm,with a mean partical size of 82.4 nm.The rate of reduction of Cr(Ⅵ)can be modelled by a pseudo-first-order reaction kinetics equation.When the concentration of chitosan is 150 mg·l-1 the first-order kinetic constant(kobs)is about twice of the contorl.The existence of Ca2+ and Mg2+ decreased the Cr(Ⅵ)removal efficiency of zero-valent iron about 20% and 10%,respectively.HCO3- and CO32- decreased the Cr(Ⅵ)removal efficiency of zero-valent iron by about 10%.

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壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素

EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON

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壳聚糖稳定纳米铁去除地表水中Cr(Ⅵ)污染的影响因素

English Abstract

EFFECT OF SOME FACTORS ON Cr(Ⅵ)REMOVAL IN SURFACE WATER BY CHITOSAN-STABILIZED NANOSCALE ZERO-VALENT IRON

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