利用吡啶类离子液体萃取分离电镀污泥中的Cr~(6+)与Fe~(3+)
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摘要
多数电镀污泥含有Cr(Ⅵ),对环境危害性极大,但其又是重要的稀有金属,对其资源化利用显得尤为重要。本文以N-辛基吡啶氯盐([OPy]Cl)离子液体为萃取剂,正戊醇为稀释剂,采用溶剂萃取法进行电镀污泥硫酸浸出液中Cr~(6+)的萃取分离的实验研究。结果表明,N-辛基吡啶氯盐([OPy]Cl)离子液体对Cr~(6+)具有较好的萃取选择性,而对于Fe~(3+)的萃取能力较弱。探索[OPy]Cl萃取剂对萃取分离Cr~(6+)、Fe~(3+)的方法,不仅有利于环境与资源,不会产生二次污染,而且为湿法冶金工业提供了一种高效、绿色的冶金分离技术。
Electroplating sludge mainly contains Cr(Ⅵ)and is extremely harmful to the environment,but Cr(Ⅵ)is also an important rare metal,so it is especially important for its resource utilization. Inthis paper,the research was designed to extract and separate Cr~(6+)and Fe~(3+)by solvent extraction using pyri-dine ionic liquids as extractant and pentanol as diluent. The results showed that N-octylpyridinium chlo-ride ionic liquid had good extraction selectivity for Cr~(6+),but its extraction ability for Fe~(3+)was weak. Ex-ploring the extraction and separation of chromium and iron with[OPy]Cl extractant not only is beneficialto the environment and resources,but also provides an efficient and green metallurgical separation tech-nology for hydrometallurgical industry.
Electroplating sludge mainly contains Cr(Ⅵ)and is extremely harmful to the environment,but Cr(Ⅵ)is also an important rare metal,so it is especially important for its resource utilization. Inthis paper,the research was designed to extract and separate Cr~(6+)and Fe~(3+)by solvent extraction using pyri-dine ionic liquids as extractant and pentanol as diluent. The results showed that N-octylpyridinium chlo-ride ionic liquid had good extraction selectivity for Cr~(6+),but its extraction ability for Fe~(3+)was weak. Ex-ploring the extraction and separation of chromium and iron with[OPy]Cl extractant not only is beneficialto the environment and resources,but also provides an efficient and green metallurgical separation tech-nology for hydrometallurgical industry.
引文
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[20] Feng L,Pengge N,Hong B C,et al. Measurement andmodeling for vanadium extraction from NaVO3-H2SO4-H2O system by primary amine N1923[J]. Chemical Ther-mo Dynamics,2014,80:13-21.
[21] Peng Y X. The New Theoretical analysis of equimolar se-ries method for the determination of the composition ofcomplexes[J]. Journal of Analytical Science,2003,19(6):592-593.
[22]李洪仁,王颖.等摩尔系列法测定配合物稳定常数的数据处理[J].沈阳大学学报(自然科学版),2014,26(4):281-283.
[23]地木拉提,黄雪莉,侯娟,等.萃取分离盐酸硫酸时萃合物萃合比测定[J].新疆石油学院学报,2001,13(1):56-57.
[24]赵志刚,田鹏,张璇,等.溴化N-正辛基吡啶的制备及其乙醇溶液的电导率[J].沈阳师范大学学报(自然科学版),2012,30(2):262-264.
[2]张川.基于循环经济的我国钢铁企业能源效率研究[D].北京:北京科技大学,2017.
[3]徐志峰,赵洪兴,王成彦,等.由混合电镀污泥硫酸浸出液选择性沉淀分离铬的研究[J].有色金属科学与工程,2015,6(5):7-8.
[4]霍小平,秦炜,孙晓玮,等. D2EHPA萃取回收Cr(Ⅲ)的研究[J].高校化学工程学报,2007,21(5):849-850.
[5] Fan Y Y,Wang X W,Wang M Y. Separation and recov-ery of chromium and vanadium from vanadium-contain-ing chromate solution by ion exchange[J]. Hydrometal-lurgy,2013,136:31-35.
[6] B8978-1996,Integrated wastewater discharge standard(中华人民共和国国家标准污水综合排放标准)[S].
[7] Caroline H,William B,Jean F,et al. Absorption anddesorption of chromium ions by poly(acrylic acid)gels[J]. Journal of Applied Polymer Science,1999,72(44):455-466.
[8] Csobán K,JoóP. Sorption of Cr(Ⅲ)on silica and alumi-num oxide:Experiments and modeling[J]. Colloid andSurface A,1999,151(1-2):97-112.
[9] Liu Z L,Liu H W,Li R. Photocatalytic reduction ofwastewater containing Cr(VI)by photocatalyst Cu2O[J]. Journal of Chemical Engineering of Chinese Univer-sities,2007,21(1):88-92.
[10] Thongchai P,Orathai C,Yaowanud S,et al. A benchscale study on chromium recovery from tanning wastewa-ter[J]. Water Science&Technology,1995,31(9):73-81.
[11] Abdelhamid M,Denise B. The extraction of titanium,chromium and cadmium from phosphoric acid solutionsby p-(1,1,3,3-tetramethyl butyl)phenyl phosphoric ac-id in kerosene diluent[J]. Hydrometallurgy,1995,37(2):117-121.
[12]曾强.酸性重金属废水的综合处理研究[D].四川:重庆大学,2015.
[13]淡维杰,肖连生,张贵清,等.萃取法提取铬(Ⅲ)分离铁(Ⅱ)的研究[J].有色金属科学与工程,2017,8(3):35-41.
[14]李雪飞.电镀污泥中铬的分离工艺研究[D].武汉:华中科技大学,2006.
[15]魏君怡,李勇.应用[Omim][BF4]为萃取剂分离钒铬渣酸浸液中钒/铬的研究[J].电镀与精饰,2017,39(8):37-42.
[16]蒋霖.钒铬溶液中钒铬提取及分离工艺研究进展[J].钢铁钒钛,2014,35(6):52-59.
[17] Fan Y Y,Wang X W,Wang M Y. Separation and recov-ery of chromium and vanadium from vanadium-contain-ing chromate solution by ion exchange[J]. Hydrometal-lurgy,2013,136:31-35.
[18] Domingo J L,Gómez M. Vanadium compounds for thetreatment of human diabetes mellitus:A scientific curiosity A review of thirty years of research[J]. Food andChemical Toxicology,2016,95:137-141.
[19]王雪峰.我国钒钛磁铁矿典型矿区资源综合利用潜力评价研究[D].北京:中国地质大学,2015.
[20] Feng L,Pengge N,Hong B C,et al. Measurement andmodeling for vanadium extraction from NaVO3-H2SO4-H2O system by primary amine N1923[J]. Chemical Ther-mo Dynamics,2014,80:13-21.
[21] Peng Y X. The New Theoretical analysis of equimolar se-ries method for the determination of the composition ofcomplexes[J]. Journal of Analytical Science,2003,19(6):592-593.
[22]李洪仁,王颖.等摩尔系列法测定配合物稳定常数的数据处理[J].沈阳大学学报(自然科学版),2014,26(4):281-283.
[23]地木拉提,黄雪莉,侯娟,等.萃取分离盐酸硫酸时萃合物萃合比测定[J].新疆石油学院学报,2001,13(1):56-57.
[24]赵志刚,田鹏,张璇,等.溴化N-正辛基吡啶的制备及其乙醇溶液的电导率[J].沈阳师范大学学报(自然科学版),2012,30(2):262-264.