纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

柳听义; 赵林; 谭欣; 刘涉江; 黄宇; 齐云; 毛国柱

环境化学

, , , , , ,

柳听义, 赵林, 谭欣, 刘涉江, 黄宇, 齐云, 毛国柱. 纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究[J]. 环境化学, 2010, 29(3): 429-433.

引用本文:

柳听义, 赵林, 谭欣, 刘涉江, 黄宇, 齐云, 毛国柱. 纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究[J]. 环境化学, 2010, 29(3): 429-433.

LIU Ting-yi, ZHAO Lin, TAN Xin, LIU She-jiang, HUANG Yu, QI Yun, MAO Guo-zhu. BATCH REMOVAL EFFICIECY OF Cr(Ⅵ) FROM LANDFILL LEACHATES BY NANO ZERO-VALENT IRON AND ITS MECHANISM[J]. Environmental Chemistry, 2010, 29(3): 429-433.

Citation:

纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

1.
天津大学环境科学与工程学院, 天津, 300072;
2.
天津大学化工学院, 天津, 300072
基金项目:
国家自然科学基金(批准号:20776096)资助

BATCH REMOVAL EFFICIECY OF Cr(Ⅵ) FROM LANDFILL LEACHATES BY NANO ZERO-VALENT IRON AND ITS MECHANISM

1.
School of Environment Science and Engineering, Tianjin University, Tianjin, 300072, China;
2.
School of Chemical and Engineering, Tianjin University, Tianjin, 300072, China
Fund Project:

摘要: 利用柠檬酸处理后的纳米零价铁(NZVI)对铬(Cr(Ⅵ))的去除进行了研究.NZVI对Cr(Ⅵ)的去除率受Cr(Ⅵ)初始浓度、pH值、反应温度和NZVI的浓度等因素影响,在Cr(Ⅵ)初始浓度为20mg·l-1、pH=5.0、NZVI投加量为1.0g.l-1和20℃条件下,Cr(Ⅵ)去处率达到了100%.腐殖酸(HA)与Cr(Ⅵ)可以形成稳定的HA-Cr螯合物,这种螯合物减少了溶液中有效的Cr(Ⅵ)浓度;同时,HA与NZVI的反应减少了NZVI的有效活性位点,HA的存在对NZVI去除Cr(Ⅵ)有竞争抑制的作用.
- 纳米零价铁 /
- 腐殖酸 /
- 柠檬酸 /
- 铬(Ⅵ) /
- 螯合物
Abstract: Nanoscale zero-valent iron(NZVI)with an mean size of 62.5 nm was pretreated with citric acid and used to remove Cr(Ⅵ).The results indicated that factors such as initial concentrations of Cr(Ⅵ)and NZVI,pH,and temperature,played a prominent role on removal rates.With an initial Cr(Ⅵ)concentration of 20 mg·l-1,NZVI dose of 1.0 g·l-1,pH 5 and a temperature of 20℃,removal rate reached 100%.HA chelates iron ions or oxide surface,and reduces the available Cr(Ⅵ)in the solution and the rate of Cr(Ⅵ)removal.Furthermore,HA reacted with NZVI and reduced reactive sites of NZVI available to Cr(Ⅵ).So HA adversely affected Cr(Ⅵ)removal using NZVI in the leachates.
- nano zero-valent iron /
- humic acids /
- citric acid /
- hexavalent chromium /
- chelate compound

点击查看大图

计量

文章访问数: 815
HTML全文浏览数: 777
PDF下载数: 509
施引文献: 0

柳听义, 赵林, 谭欣, 刘涉江, 黄宇, 齐云, 毛国柱. 纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究[J]. 环境化学, 2010, 29(3): 429-433.

引用本文:

柳听义, 赵林, 谭欣, 刘涉江, 黄宇, 齐云, 毛国柱. 纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究[J]. 环境化学, 2010, 29(3): 429-433.

Citation:

纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

1. 天津大学环境科学与工程学院, 天津, 300072;
2. 天津大学化工学院, 天津, 300072

收稿日期: 2009-04-21

基金项目:

国家自然科学基金(批准号:20776096)资助

关键词:

摘要: 利用柠檬酸处理后的纳米零价铁(NZVI)对铬(Cr(Ⅵ))的去除进行了研究.NZVI对Cr(Ⅵ)的去除率受Cr(Ⅵ)初始浓度、pH值、反应温度和NZVI的浓度等因素影响,在Cr(Ⅵ)初始浓度为20mg·l-1、pH=5.0、NZVI投加量为1.0g.l-1和20℃条件下,Cr(Ⅵ)去处率达到了100%.腐殖酸(HA)与Cr(Ⅵ)可以形成稳定的HA-Cr螯合物,这种螯合物减少了溶液中有效的Cr(Ⅵ)浓度;同时,HA与NZVI的反应减少了NZVI的有效活性位点,HA的存在对NZVI去除Cr(Ⅵ)有竞争抑制的作用.

English Abstract

BATCH REMOVAL EFFICIECY OF Cr(Ⅵ) FROM LANDFILL LEACHATES BY NANO ZERO-VALENT IRON AND ITS MECHANISM

1. School of Environment Science and Engineering, Tianjin University, Tianjin, 300072, China;
2. School of Chemical and Engineering, Tianjin University, Tianjin, 300072, China

Received Date: 2009-04-21

Fund Project:

Keywords:

Abstract: Nanoscale zero-valent iron(NZVI)with an mean size of 62.5 nm was pretreated with citric acid and used to remove Cr(Ⅵ).The results indicated that factors such as initial concentrations of Cr(Ⅵ)and NZVI,pH,and temperature,played a prominent role on removal rates.With an initial Cr(Ⅵ)concentration of 20 mg·l-1,NZVI dose of 1.0 g·l-1,pH 5 and a temperature of 20℃,removal rate reached 100%.HA chelates iron ions or oxide surface,and reduces the available Cr(Ⅵ)in the solution and the rate of Cr(Ⅵ)removal.Furthermore,HA reacted with NZVI and reduced reactive sites of NZVI available to Cr(Ⅵ).So HA adversely affected Cr(Ⅵ)removal using NZVI in the leachates.

全文HTML

参考文献 (0)

下载: 全尺寸图片幻灯片

返回文章

用微信扫码二维码

分享至好友和朋友圈

纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

BATCH REMOVAL EFFICIECY OF Cr(Ⅵ) FROM LANDFILL LEACHATES BY NANO ZERO-VALENT IRON AND ITS MECHANISM

计量

出版历程

纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

English Abstract

BATCH REMOVAL EFFICIECY OF Cr(Ⅵ) FROM LANDFILL LEACHATES BY NANO ZERO-VALENT IRON AND ITS MECHANISM

全文HTML

目录