用DIOSO从水溶液中萃取镉的研究
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摘要
为探究亚砜类化合物对水中重金属镉的萃取效率和萃取机理,报道了利用二异辛基亚砜(DIOSO)萃取水溶液中镉的情况,实验制备了DIOSO,以其为萃取剂探索其对水溶液中镉的萃取情况,得出最佳萃取条件,在此条件下最高萃取率为99.7%。为达到萃取剂的回收循环利用,实验研究了不同反萃剂对Cd(Ⅱ)的反萃情况,得出利用0.2 mol/L NaOH为反萃剂时能把有机相中的Cd上,结合光谱和热力学分析,DIOSO对Cd(Ⅱ)的萃取过程可能是离子间发生了缔合作用。DIOSO对水中Cd(Ⅱ)的成功萃取,可以为工业废水污染中Cd(Ⅱ)的处理提供重要理论研究基础。
To investigate the extraction efficiency and extraction mechanism of sulfoxide compounds in heavy metal cadmium in water, the extraction of cadmium in aqueous solution by diisooctyl sulfoxide(DIOSO) was reported.DIOSO was prepared and used as an extractant to explore its aqueous solution. Under this condition, a maximum extraction percentage was 99.7 %. To the recycling of extractant, we also carried out cadmium stripping experiments with different stripping agents, the results demonstrated that nearly all of the Cd(Ⅱ)( 99.86%) in the organic phase could be reverse extracted into the aqueous phase when the NaOH concentration reached 0.2 mol/L. On this basis,combining spectrum and thermodynamic analysis, the extraction process of Cd(Ⅱ) from aqueous solutions by DIOSO may be happened between ion associations. Successfully extracted of Cd(Ⅱ) by DIOSO could provide important theoretical research foundation to heavy metals Cd(Ⅱ) in industrial wastewater pollution.
To investigate the extraction efficiency and extraction mechanism of sulfoxide compounds in heavy metal cadmium in water, the extraction of cadmium in aqueous solution by diisooctyl sulfoxide(DIOSO) was reported.DIOSO was prepared and used as an extractant to explore its aqueous solution. Under this condition, a maximum extraction percentage was 99.7 %. To the recycling of extractant, we also carried out cadmium stripping experiments with different stripping agents, the results demonstrated that nearly all of the Cd(Ⅱ)( 99.86%) in the organic phase could be reverse extracted into the aqueous phase when the NaOH concentration reached 0.2 mol/L. On this basis,combining spectrum and thermodynamic analysis, the extraction process of Cd(Ⅱ) from aqueous solutions by DIOSO may be happened between ion associations. Successfully extracted of Cd(Ⅱ) by DIOSO could provide important theoretical research foundation to heavy metals Cd(Ⅱ) in industrial wastewater pollution.
引文
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[22]Kumar V,Kumar M,Jha M K,et al.Solvent extraction of cadmium from sulfate solution with di-(2-ethylhexyl)phosphoric acid diluted in kerosene[J].Hydrometallurgy,2009,96:230-234.
[23]Alguacil F J,Tayibi H.Carrier-facilitated transport of Cd(Ⅱ)from a high-salinity chloride medium across a supported liquid membrane containing Cyanex 923 in Solvesso 100[J].Desalination,2005,180(1):181-187.
[24]Leopolda A A,Colla M T,Fortunya A,et al.Mathematical modeling of cadmium(Ⅱ)solvent extraction from neutral and acidic chloride media using Cyanex 923 extractant as a metal carrier[J].Journal of Hazardous Materials,2010,182(1/2/3):903-911.
[25]Regel M,Sastre A M,Szymanowski J.Recovery of zinc(Ⅱ)from HCl spent pickling solutions by solvent extraction[J].Environmental Science&Technology,2001,35(3):630-635.
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[27]Alguacil F J,Lopez F A.The extraction of mineral acids by the phosphine oxide Cyanex 923[J].Hydrometallurgy,1996,42:245-255.
[28]Martfnez S,Sastre A,Alguacil F J.Gold extraction equilibrium in the system Cyanex 921-HC1-Au(III)[J].Hydrometallurgy,1997,46:205-214.
[29]Barroso M A,Lopez F A,Sastre A.Study of the extraction of gold(Ⅲ)in aqueous hydrochloric acid media by the phosphine oxide Cyanex 925[J].Hydrometallurgy,1997,45(1):199-209.
[2]张微微,万素琴,梁斌.含铅含镉废水处理技术[J].现代冶金,2013,41(5):64-66.Zhang W W,Wan S Q,Liang B.Lead and cadmium bearing wastewater treatment technology[J].Modern Metallurgy,2013,41(5):64-66.
[3]Andrew H P K,Li C,Banerji S K,et al.Extraction,recovery,and biostability of EDTA for remediation of heavy metal-contaminated soil[J].Journal of Soil Contamination,1999,8(1):81-103.
[4]Mánuel V,Pinto J J,Mendiguchía C,et al.Solvent extraction with organophosphorus extractants in environmental samples:determination of cadmium(Ⅱ)in natural water[J].Central European Journal of Chemistry,2014,12(3):348-353.
[5]Szilassy I,Sumeghy L,Vadasdi K.Solvent extraction separation and recovery of components from scraps containing nickel and cadmium[J].Mineral Processing and Extractive Metullargy Review,1997,17(4):227-238.
[6]Billah M,Honjo T.Separation and determination of cadmium and zinc as their thenoyltrifluoroacetone complexes with dibenzo-18-crown-6 by means of synergistic extraction and atomic absorption spectrometry[J].Fresenius Journal of Analytical Chemistry,1997,357(1):61-64.
[7]Jha M K,Kumar V,Jeong J,et al.Review on solvent extraction of cadmium from various solutions[J].Hydrometallurgy,2012,111(1):1-9.
[8]Reddy B R,Priya D N,Kumar J R.Solvent extraction of cadmium(Ⅱ)from sulphate solutions using TOPS 99,PC 88A,Cyanex 272 and their mixtures[J].Hydrometallurgy,2004,74(3/4):277-283.
[9]Alonso A I,Urtiaga A M,Zamacona S,et al.Kinetic modelling of cadmium removal from phosphoric acid by non-dispersive solvent extraction[J].Journal of Membrane Science,1997,130(1/2):193-203.
[10]Menoyo B,Elizalde M P,Almela A.Extraction of lead by Cyanex302 from phosphoric acid media[J].Solvent Extraction and Ion Exchange,2001,19(4):677-698.
[11]Almela A,Elizalde M,Ocio A.Cadmium(Ⅱ)extraction from phosphoric media by bis(2,4,4-trimethylpentyl)dithiophosphinic acid(CYANEX 301)[J].Fluid Phase Equilibria,2004,22(6):961-977.
[12]Gupta B,Deep A,Malik P.Extraction and recovery of cadmium using Cyanex 923[J].Hydrometallurgy,2001,61(1):65-71.
[13]Wang W Y,Schaumberg D A,Park S K.Cadmium and lead exposure and risk of cataract surgery in U.S.adults[J].International Journal of Hygiene and Environmental Health,2016,219(8):850-856.
[14]Yuan C Y,Long H Y,Ma E X.Synthesis of sulfoxides and their structure-reactivity studies on the lanthanide extraction[J].Science China Chemistry,1984,27(9):887-897.
[15]中华人民共和国国家技术监督局.污水综合排放标准:GB/T8978-1988[S].北京:中国标准出版社,1998.com.cn State Bureau of Technical Supervision of the People.s Republic of China.Integrated sastewater discharge standard:GB/T 8978-1988[S].Beijing:Standards Press of China,1988.
[16]Parhi P K,Das N N,Sarangi K.Extraction of cadmium from dilute solution using supported liquid membrane[J].Journal of Hazardous Materials,2009,172:773-779.
[17]Alamdari E K,Moradkhani D,Darvishi D,et al.Synergistic effect of MEHPA on co-extraction of zinc and cadmium with DEHPA[J].Minerals Engineering,2004,17:89-92.
[18]Norman L N.Separating hydrocarbons with liquid membranes:US3410794[P].1968-11-12.
[19]杨项军,陈景,谢琦莹.表面活性剂从碱性氰化液中萃取金[J].化学进展,2009,21(7/8):1583-1591.Yang X J,Chen J,Xie Q Y.Surfactant extracts gold from alkaline cyanide liquid[J].Progress in Chemistry,2009,21(7/8):1583-1591.
[20]Jiang J Z,Wang X Y,Zhou W J,et al.Extraction of gold from alkaline cyanide solution by the tetradecyldimethylbenzylammonium chloride/tri-n-butyl phosphate/n-heptane system based on a microemulsion mechanism[J].Physical Chemistry Chemical Physics,2002,4:4489-4494.
[21]Gupta B,Malik P,Deep A.Solvent extraction and separation of tervalent lanthanides and yttrium using Cyanex 923[J].Solvent Extraction and Ion Exchange,2003,21(2):239-258.
[22]Kumar V,Kumar M,Jha M K,et al.Solvent extraction of cadmium from sulfate solution with di-(2-ethylhexyl)phosphoric acid diluted in kerosene[J].Hydrometallurgy,2009,96:230-234.
[23]Alguacil F J,Tayibi H.Carrier-facilitated transport of Cd(Ⅱ)from a high-salinity chloride medium across a supported liquid membrane containing Cyanex 923 in Solvesso 100[J].Desalination,2005,180(1):181-187.
[24]Leopolda A A,Colla M T,Fortunya A,et al.Mathematical modeling of cadmium(Ⅱ)solvent extraction from neutral and acidic chloride media using Cyanex 923 extractant as a metal carrier[J].Journal of Hazardous Materials,2010,182(1/2/3):903-911.
[25]Regel M,Sastre A M,Szymanowski J.Recovery of zinc(Ⅱ)from HCl spent pickling solutions by solvent extraction[J].Environmental Science&Technology,2001,35(3):630-635.
[26]Cierpiszewski R,Miesiac I,Regelrosocka M,et al.Removal of zinc(Ⅱ)from spent hydrochloric acid solutions from zinc hot galvanizing plants[J].Industrial&Engineering Chemistry Research,2002,41:598-603.
[27]Alguacil F J,Lopez F A.The extraction of mineral acids by the phosphine oxide Cyanex 923[J].Hydrometallurgy,1996,42:245-255.
[28]Martfnez S,Sastre A,Alguacil F J.Gold extraction equilibrium in the system Cyanex 921-HC1-Au(III)[J].Hydrometallurgy,1997,46:205-214.
[29]Barroso M A,Lopez F A,Sastre A.Study of the extraction of gold(Ⅲ)in aqueous hydrochloric acid media by the phosphine oxide Cyanex 925[J].Hydrometallurgy,1997,45(1):199-209.