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一步还原焙烧法制备炭载零价铁及其对水中Cr(Ⅵ)的去除

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吴锦华, 钟家炜, 揭雪飞, 梁好, 刘传胜. 一步还原焙烧法制备炭载零价铁及其对水中Cr(Ⅵ)的去除[J]. 环境工程学报, 2016, 10(10): 5347-5351. doi: 10.12030/j.cjee.201505134
引用本文: 吴锦华, 钟家炜, 揭雪飞, 梁好, 刘传胜. 一步还原焙烧法制备炭载零价铁及其对水中Cr(Ⅵ)的去除[J]. 环境工程学报, 2016, 10(10): 5347-5351. doi: 10.12030/j.cjee.201505134
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WU Jinhua, ZHONG Jiawei, JIE Xuefei, LIANG Hao, LIU Chuansheng. One-step reductive roasting synthesis of activated carbon supported zero valent iron for the removal of Cr(Ⅵ) from aqueous solution[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5347-5351. doi: 10.12030/j.cjee.201505134
Citation: WU Jinhua, ZHONG Jiawei, JIE Xuefei, LIANG Hao, LIU Chuansheng. One-step reductive roasting synthesis of activated carbon supported zero valent iron for the removal of Cr(Ⅵ) from aqueous solution[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5347-5351. doi: 10.12030/j.cjee.201505134
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一步还原焙烧法制备炭载零价铁及其对水中Cr(Ⅵ)的去除

  • 1.

    华南理工大学环境与能源学院, 工业聚集区污染控制与生态修复教育部重点实验室, 污染控制与生态修复广东省普通高等学校重点实验室, 广州 510006

  • 2.

    广东轻工职业技术学院化学工程系, 广州 510300

  • 3.

    广州军区联勤部净水研究所, 广州 510500

  • 基金项目:

    国家自然科学基金资助项目（41571302）

    中央高校基本科研业务费资助项目（2015ZZ047）

    广东省水利科技创新项目（2016-26）

  • 中图分类号: X703.1;X703.5

One-step reductive roasting synthesis of activated carbon supported zero valent iron for the removal of Cr(Ⅵ) from aqueous solution

  • 1.

    Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China

  • 2.

    Department of Chemical Engineering, Guangdong Industry Technical College, Guangzhou 510300, China

  • 3.

    Water Purification Institute of Logistics Department of Guangzhou Military Region, Guangzhou 510500, China

  • Fund Project:

  • 摘要: 以活性炭为还原剂和载体，通过一步还原焙烧法制备出炭载零价铁（AC-ZVI）材料。电镜扫描和X射线衍射分析结果表明，零价铁以平均粒径为2 μm的颗粒均匀分布在活性炭表面和孔道中。采用间歇实验考察了炭载零价铁去除水中Cr（Ⅵ）的效果，结果显示炭载零价铁对水中的Cr（Ⅵ）具有很好的去除效果，在初始pH值为5、Cr（Ⅵ）浓度为50 mg·L-1、AC-ZVI投加量（铁用量）为0.6 g·L-1和反应温度为25℃的条件下，反应5 h后Cr（Ⅵ）的去除率达到86.8%；降低溶液pH、增加炭载零价铁投加量和提高反应温度均有利于Cr（Ⅵ）的去除，反应过程符合准一级动力学，表观反应速率常数k为0.655 h-1（30℃），反应活化能为67.6 kJ·mol-1。研究结果表明，通过一步还原焙烧法制得的炭载零价铁可作为一种高效吸附还原材料用于Cr（Ⅵ）污染水体的治理。
    Abstract: An activated carbon-supported zero-valent iron (AC-ZVI) material was prepared through a one-step reductive roasting method with activated carbon (AC) as a reductant and supporting matrix.Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis revealed that iron particles with an average diameter of 2 μm were dispersed uniformly on the surface and pores of the AC.Batch experiments were conducted to investigate the removal of Cr(Ⅵ) from aqueous solutions by the AC-ZVI.The AC-ZVI showed efficient Cr(Ⅵ) removal performance of 86.8% within 5 h at an initial pH of 5,Cr(Ⅵ) concentration of 50 mg·L-1,and AC-ZVI concentration of 0.6 g·L-1 at 25℃.The removal efficiency of Cr(Ⅵ) increased with AC-ZVI dosage,temperature,and lower pH values.The removal of Cr(Ⅵ) by the AC-ZVI followed pseudo-first-order kinetics,and the pseudo-first-order rate constant k was determined to be 0.655 h-1 (30℃).The activation energy was found to be 67.6 kJ·mol-1.This indicated that AC-ZVI prepared through the reductive roasting method can be used as an efficient adsorptive and reductive material for the removal of Cr(Ⅵ) from water.
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出版历程
  • 收稿日期:  2015-06-25
  • 刊出日期:  2016-10-20

一步还原焙烧法制备炭载零价铁及其对水中Cr(Ⅵ)的去除

  • 1. 华南理工大学环境与能源学院, 工业聚集区污染控制与生态修复教育部重点实验室, 污染控制与生态修复广东省普通高等学校重点实验室, 广州 510006
  • 2. 广东轻工职业技术学院化学工程系, 广州 510300
  • 3. 广州军区联勤部净水研究所, 广州 510500
  • 收稿日期:  2015-06-25
基金项目:

国家自然科学基金资助项目（41571302）

中央高校基本科研业务费资助项目（2015ZZ047）

广东省水利科技创新项目（2016-26）

摘要: 以活性炭为还原剂和载体，通过一步还原焙烧法制备出炭载零价铁（AC-ZVI）材料。电镜扫描和X射线衍射分析结果表明，零价铁以平均粒径为2 μm的颗粒均匀分布在活性炭表面和孔道中。采用间歇实验考察了炭载零价铁去除水中Cr（Ⅵ）的效果，结果显示炭载零价铁对水中的Cr（Ⅵ）具有很好的去除效果，在初始pH值为5、Cr（Ⅵ）浓度为50 mg·L-1、AC-ZVI投加量（铁用量）为0.6 g·L-1和反应温度为25℃的条件下，反应5 h后Cr（Ⅵ）的去除率达到86.8%；降低溶液pH、增加炭载零价铁投加量和提高反应温度均有利于Cr（Ⅵ）的去除，反应过程符合准一级动力学，表观反应速率常数k为0.655 h-1（30℃），反应活化能为67.6 kJ·mol-1。研究结果表明，通过一步还原焙烧法制得的炭载零价铁可作为一种高效吸附还原材料用于Cr（Ⅵ）污染水体的治理。

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