生物炭负载纳米零价铁制备及修复六价铬污染土壤技术研究进展  

REVIEW ON PREPARATION OF BIO-CARBON LOADED NANO ZERO-VALENT IRON AND ITS APPLICATION IN REMEDIATING Cr(Ⅵ)-CONTAMINATED SOIL

作　　者：黄开友 申英杰 王晓岩[1] 王兴润[2] 苑文仪 张承龙 白建峰 王景伟 HUANG Kai-you;SHEN Ying-jie;WANG Xiao-yan;WANG Xing-run;YUAN Wen-yi;ZHANG Cheng-long;BAI Jian-feng;WANG Jing-wei(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Enviromental Sciences,Beijing 100012,China;WEEE Research Centre,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学环境与材料工程学院,上海201209 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]上海第二工业大学电子废弃物研究中心,上海201209

出　　处：《环境工程》2020年第11期203-210,195,共9页Environmental Engineering

基　　金：上海第二工业大学研究生项目基金(A10GY19H010-d02);国家自然科学基金面上项目(21876106);上海第二工业大学重点学科(XXKZD1602)。

摘　　要：近年来,纳米零价铁颗粒(nZVI)应用于Cr(Ⅵ)污染修复治理技术研究备受关注。生物炭负载型纳米零价铁(nZVI@BC)作为纳米零价铁改性技术之一,具有低成本、易制备和修复效果优越等优点,但此技术应用于Cr(Ⅵ)污染土壤修复方面研究尚不多。生物炭(BC)主要通过植物秸秆热解生成,生物炭负载纳米零价铁(nZVI@BC)则通过生物炭与纳米零价铁在热解-液相还原法或一步热解法合成。制备的nZVI@BC能够有效解决纳米零价铁团聚和钝化等缺点,显著提高纳米零价铁(nZVI)利用率。综述了生物炭负载纳米零价铁(nZVI@BC)应用于修复Cr(Ⅵ)污染土壤反应机理和研究进展,总结出提升该材料性能的途径有:通过调整BC热解条件和改性BC以提升BC性能;适当的质量比(BC/nZVI);使用聚乙二醇(PEG)、羧甲基纤维素(CMC)、污泥衍生的BC和茶多酚(TP)提高nZVI稳定性。nZVI@BC材料能够提高土壤中有机质含量,在Cr(Ⅵ)修复治理方面极具应用前景。In recent years,the application of nano zero-valent iron(nZVI)on the treatment of Cr(Ⅵ)pollution attracted more and more attention.Biochar-loaded nano zero-valent iron(nZVI@BC),as one of the nano zero-valent iron modification technologies,is with the advantages of low cost,easy preparation and excellent remediation effect.However,the researches on its application on the Cr(Ⅵ)contaminated soil remediation were not sufficient.Plants straw were used in this study to prepare biochar(BC)by pyrolysis process.Biochar-supported nZVI was synthesized by liquid phase reduction or one-step pyrolysis with biochar and nano zero-valent iron.The synthesized nZVI@BC could effectively solve the relative disadvantages of nano-scale zero-valent iron,such as aggregation and passivation,and significantly increased the utilization of nano zero-valent iron(nZVI).In this research,the reaction mechanism and the research progress of nZVI@BC for remediation of Cr(Ⅵ)-contaminated soil,and the ways to improve the performance of the material were summarized as follows:improved BC performance by adjusting BC pyrolysis conditions and modifying BC,appropriate mass ratio(BC/nZVI),improved nZVI stability by polyethylene glycol(PEG),carboxymethyl cellulose(CMC),sludge-derived BC and tea polyphenols(TP).In addition,the material could increase the content of organic matters in the soil,and is with great application prospect in Cr(Ⅵ)remediation.

关 键 词：生物炭 纳米零价铁 Cr(Ⅵ) 土壤修复 

分 类 号：TB383.1[一般工业技术—材料科学与工程] X53[环境科学与工程—环境工程]