Leaching kinetics of acid-soluble Cr(VI) from chromite ore processing residue with hydrofluoric acid

被引：0
作者：
Xiao-bin) Li
Wen-bin Xu
Qiu-sheng Zhou
Zhi-hong Peng
Gui-hua Liu
机构：
[1] Central South University,School of Metallurgical Science and Engineering
[2] Aluminum Corporation of China Limited,Shandong Branch
来源：
Journal of Central South University | 2011年 / 18卷
关键词：
leaching; kinetics; hydrofluoric acid; hexavalent chromium; chromite ore processing residue;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Leaching kinetics of acid-soluble Cr(VI) in chromite ore processing residue (COPR) using hydrofluoric (HF) acid solution as a leaching agent was investigated for potential remediation of COPR with industrial waste water containing HF. The results show that HF can effectively destabilize the Cr(VI)-bearing minerals, resulting in the mobilization of Cr(VI) from COPR into the leachate. Particle size significantly influences the leaching of acid-soluble Cr(VI) from COPR, followed by leaching time, whereas the effects of HF concentration and leaching temperature are slight and the influence of stirring rate is negligible. The leaching process of acid-soluble Cr(VI) from COPR is controlled by the diffusion through the product layer. The apparent activation energy is 8.696 kJ/mol and the reaction orders with respect to HF concentration and particle size is 0.493 8 and −2.013 3, respectively.
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页码：399 / 405
页数：6
相关论文
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  • [1] Kowalski Z.(2003)Environmental evaluation of different variants of the chromium compound production model using chromic waste [J] Waste Management 23 771-783
  • [2] Gollinger-Tarajko M.(2001)Leaching behavior of a chromium smelter waste heap [J] Waste Management 21 265-270
  • [3] Deakin D.(2009)Effects of particle size and acid addition on the remediation of chromite ore processing residue using ferrous sulfate [J] Journal of Hazardous Materials 168 121-128
  • [4] West L. J.(2004)Two key points for the treatment of chromium ore processing residue [J] Inorganic Chemicals Industry 36 1-4
  • [5] Stewart D. I.(2002)Identification and geochemical modeling of processes controlling leaching of Cr(VI) and other major elements from chromite ore processing residue [J] Geochimica et Cosmochimica Acta 66 3927-3942
  • [6] Yardleyd B. W.(2003)Role of quantitative mineralogical analysis in the investigation sites contaminated by chromite ore processing residue [J] Science of the Total Environment 308 195-210
  • [7] Jagupilla S. C.(2007)Hydrogarnet: A host phase for Cr(VI) in chromite ore processing residue (COPR) and other high pH wastes [J] Environmental Science and Technology 41 1921-1927
  • [8] Moon D. H.(2004)Characterization of Cr ion exchange with hydrotalcite [J] Chemosphere 57 541-546
  • [9] Waznea M.(2006)The implications of integrated assessment and modeling studies for the future remediation of chromite ore processing residue disposal sites [J] Science of the Total Environment 360 90-97
  • [10] Christodoulatos C.(2008)Mobilization of Cr(VI) from chromite ore processing residue through acid treatment [J] Science of the Total Environment 391 13-25
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