无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (4): 1-.

• 论文 •    下一篇

高钙铬渣及其解毒后可溶六价铬含量分析方法研究

  王天贵1,李 强2,秦利玲1,吕书玲1   

  1. 1.河南工业大学化学化工学院,河南郑州 450001;2.山西大同大学化学与化工学院
  • 发布日期:2012-04-06

Evaluation of methods for determination of hexavalent chromium contained in chromite ore processing residue

Wang Tiangui1,Li Qiang2,Qin Liling1,Lü Shuling1   

  1. 1.School of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou,450001,China
    2.School of Chemistry and Chemical Engineering,Shanxi Datong University
  • Published:2012-04-06

摘要: 分析了铬渣中六价铬含量的测定方法、六价铬的浸取方法、解毒铬渣的评价方法等几个方面的问题。通过对比国内外大量的研究结果,指出了铬渣中六价铬浸取评价方法存在的问题。由于铬渣的强碱性及其强大的酸中和能力,所谓的酸液浸取大多名不符实,用硫酸、硝酸、盐酸稀溶液浸取铬渣中六价铬要比USEPA Method 3060A碱消解方法效果差很多;用HJ/T 299—2007和HJ/T 300—2007评价解毒后的铬渣存在很多问题;用GB 5085.3—2007 评价铬渣的浸出毒性也有不严密的地方。测定铬渣中六价铬最好用物理方法,例如XANES方法;浸取铬渣中的六价铬宜采用USEPA Method 3060A的碱消解方法。

关键词: 铬渣, 六价铬, 浸取, 解毒评价

Abstract: Hexavalent chromium(Cr6+) determination,and extraction protocols from chromite ore processing residue (COPR),and the evaluation of the harmlessness measures of COPR were reviewed.Problems of some Cr6+ leaching protocols of COPR were pointed out by referring to quite a lot of related publications at home and abroad.As the strong alkali and the great acid neutralization capability of COPR,many so-called Cr6+ acid solution extractions are untrue.USEPA Method 3060A leaches much more Cr6+ than the diluted aqueous solutions of sulfuric acid, nitric acid or hydrochloric acid.HJ/T 299—2007 and HJ/T 300—2007 methods can not determine genuine Cr6+ content of the treated COPR.GB 5085.3—2007 has flaws for evaluating the leaching toxicity of COPR.Best choice for determining Cr6+ content of COPR is physical analysis, such as X-ray absorption near-edge structure analysis;and it′s better to leach Cr6+ from COPR by USEPA Method 3060A.

Key words: chromite ore processing residue, hexavalent chromium, leaching method, detoxification evaluation

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