生物炭负载零价纳米铁对溶液中的Cr6+去除的研究  

Study on Removal of Cr6+ in Solution by Nano Zero-Valent Iron Supported on Biochar

作　　者：唐宝玲 李盟 陈胜文[1,2] 王利军[1,2] TANG Baoling;LI Meng;CHEN Shengwen;WANG Lijun(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Research Center of Resource Recycling Science and Engineering,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]上海第二工业大学资源循环科学与工程中心,上海201209

出　　处：《上海第二工业大学学报》2019年第3期159-165,共7页Journal of Shanghai Polytechnic University

基　　金：上海市高原学科-环境科学与工程(资源循环科学与工程);上海第二工业大学培育学科建设项目(EGD18YJ0029);青产学研2018-48资助

摘　　要：生物炭(biochar,BC)作为载体,负载纳米零价铁(nano zero valent iron,nZVI)形成复合吸附材料,利用电子扫描显微镜(SEM)和X射线衍射仪(XRD)表征材料的结构特征。研究了不同材料、初始溶液初始pH、不同初始浓度、去除剂的投加量对BC负载nZVI(nZVI-BC)去除含Cr6+废水的影响。结果表明:BC的加入提高了nZVI的分散性和抗氧化性,同时提升稳定性,对于水中Cr6+的去除具有较好的效果;当Cr6+的初始浓度为15 mg/L,去除剂的投加量为2.5 g/L,pH=4的条件下,其去除率达到了98%;nZVI-BC去除含Cr6+废水的过程符合Langmuir吸附等温式和准一级动力学方程,其中最大吸附量为209.93 mg/g。Biochar(BC)was used as a carrier,and nano zero valent iron(nZVI)was supported to form a composite adsorbent.The structural characteristics of the material were characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The effects of different materials,initial pH of initial solution,different initial concentrations and dosage of remover on the removal of Cr6+wastewater by BC supported nZVI(nZVI-BC)were studied.The results show that the addition of BC improves the dispersibility,oxidation resistance of nZVI and the stability.It has a good effect on the removal of Cr6+in water.When the initial concentration of Cr6+is 15 mg/L,the addition of the remover is 2.5 g/L and the value of pH is 4,the removal rate is up to 98%;the removal rate of Cr6+wastewater by nZVI-BC accords with Langmuir adsorption isotherm and pseudo-first-order kinetic equation,the maximum adsorption amount is 209.93 mg/g.

关 键 词：生物炭 改性材料 纳米零价铁 含铬废水 

分 类 号：X522[环境科学与工程—环境工程]