组合液膜对土壤淋洗液中砷(As)的提取效果
|
摘要
针对土壤淋洗液中重金属传统萃取及液膜提取方法效率低的问题,提出组合液膜来提高提取率.本研究采用双二-乙基已基磷酸(D2EDTPA)和磷酸三丁酯(TBP)互为协同提取剂的组合液膜提取技术对土壤淋洗液中砷(As)进行提取,考察了系统温度、组合池膜溶液提取剂与膜溶剂体积比(M1/M2)、组合相有机相与水相体积比(O/A)、组合相提取剂比例(VD2EDTPA/VTBP)对As3+和As5+提取率的影响.研究结果表明,组合提取剂与As形成络合物在液膜系统中传输,最佳提取条件为:系统温度在28—30℃左右、M1/M2为4∶1、O/A为2∶1、VD2EDTPA/VTBP为4∶3.As3+和As5+起始浓度为5.45×10~(-4)mol·L~(-1)和1.12×10~(-4)mol·L~(-1)时,90 min最佳提取条件下提取率可达93.1%和82.7%.
In order to improve the extraction efficiency of the traditional extraction and liquid film extraction method in soil leaching liquor,this paper proposed a combination liquid membrane to improve the extraction rate. A composite liquid membrane with bis 2-ethyl phosphoric acid( D2 EDTPA) and tributyl phosphate( TBP) as synergistic extractant,was used to extract arsenic( As) in the soil leachate. Effects of the system water temperature,volume ratio of membrane solvent to solvent in the combined receiving pool( M1/M2),volume ratio of organic phase to aqueous phase in the composite phase( O/A) and extractant proportion of composite phase( VD2 EDTPA/VTBP) on the extraction rate of As3+and As5+were investigated. The results showed that the synergistic extractants formed a complex with As and transported in the liquid membrane system. The optimum extraction conditions were the system temperature about 28—30 ℃,M1/M2 4∶1,O/A 2∶1 and VD2 EDTPA/VTBP4 ∶3. At initial concentrations of As3+and As5+of 5.45 ×10~(-4) mol·L~(-1) and 1.12 × 10~(-4) mol·L~(-1),the extraction rate reached 93.1% and 82.7% under the optimum conditions.
In order to improve the extraction efficiency of the traditional extraction and liquid film extraction method in soil leaching liquor,this paper proposed a combination liquid membrane to improve the extraction rate. A composite liquid membrane with bis 2-ethyl phosphoric acid( D2 EDTPA) and tributyl phosphate( TBP) as synergistic extractant,was used to extract arsenic( As) in the soil leachate. Effects of the system water temperature,volume ratio of membrane solvent to solvent in the combined receiving pool( M1/M2),volume ratio of organic phase to aqueous phase in the composite phase( O/A) and extractant proportion of composite phase( VD2 EDTPA/VTBP) on the extraction rate of As3+and As5+were investigated. The results showed that the synergistic extractants formed a complex with As and transported in the liquid membrane system. The optimum extraction conditions were the system temperature about 28—30 ℃,M1/M2 4∶1,O/A 2∶1 and VD2 EDTPA/VTBP4 ∶3. At initial concentrations of As3+and As5+of 5.45 ×10~(-4) mol·L~(-1) and 1.12 × 10~(-4) mol·L~(-1),the extraction rate reached 93.1% and 82.7% under the optimum conditions.
引文
[1]肖锦华.无机萃取剂去除污染土壤中重金属的研究[D].长沙:中南林业科技大学,2009.XIAO J H.Study on removal of heavy metals from contaminated soil by inorganic extractant[D].Changsha:Central South University of Forestry and Technology,2009(in Chinese).
[2]杨玉,尹春峰,汤佳乐,等.长沙和株洲地区葡萄园土壤重金属含量分析及污染评价[J].湖南农业科学,2017(8):41-44.YANG Y,YIN CF,TANG J L,et al.Changsha and the Zhuzhou area analysis and evaluation of pollution of soil heavy metals in the vineyard[J].Hunan Agricultural Sciences,2017(8):41-44(in Chinese).
[3]曾睿,胡志鑫,陈丹,等.砷污染土壤修复技术的研究与应用[J].环境与发展,2017,41(7):88-89.ZENG R,HU Z X,CHEN D,et al.Research and application of remediation technology for arsenic contaminated soil[J].Environment and Development,2017,41(7):88-89(in Chinese).
[4]李坚,彭大龙.用溶剂萃取除去铜电解液中砷的研究[J].昆明理工大学学报,1998(3):73-79.LI J,PENG D L.Study on removal of arsenic from copper electrolyte by solvent extraction[J].Journal of Kunming University of Science and Technology,1998(3):73-79(in Chinese).
[5]高雪,曾希柏,白玲玉,等.有机酸对As(Ⅴ)在土壤中老化的影响[J].农业环境科学学报,2017,36(8):1526-1536.GAO X,ZENG X B,BAI L Y,et al.Effects of organic acids on the aging of As(Ⅴ)in soil[J].Journal of Agro Environmental Sciences,2017,36(8):1526-1536(in Chinese).
[6]王瑞永.C923萃取铜电解液中砷和铋的试验研究[J].黄金科学技术,2015,23(1):90-94.WANG R Y.C923 extraction of arsenic and bismuth in copper electrolyte[J].Gold Science and Technology,2015,23(1):90-94(in Chinese).
[7]童长仁,武金朋,李俊朝,等.TBP与N1923协同萃取铜电解液中的砷锑铋[J].有色金属(冶炼部分),2012(5):17-20.TONG C R,WU J P,LI J Z,et al.Co extraction of arsenic,antimony and bismuth in copper electrolyte with TBP and N1923[J].Nonferrous Metals(Smelting Part),2012(5):17-20(in Chinese).
[8]易涛,严纯华,李标国.平板夹心型支撑液膜萃取体系中La3+迁移行为[J].中国稀土学报,1995,13(3):197-200.YI T,YAN C H,LI B G.La3+migration behavior in the support liquid membrane extraction system of flat sandwich type[J].Chinese Journal of Rare Earth,1995,13(3):197-200(in Chinese).
[9]杜启云,王利生,胡新萍.几种支撑液膜组件的结构形式[J].水处理技术,1995,21(5):242-252.DU Q Y,WANG L S,HU X P.Structural forms of several supporting liquid membrane components[J].Water Treatment Technology,1995,21(5):242-252(in Chinese).
[10]TERAMOTO M,TOHNO N,OHNISHI N,et al.Development of a spiral-type flowing liquid membrane module with high stability and its qpplication to the recovery of chromium and zinc[J].Sep Sci Technol,1989,24(7):981-999.
[11]TERAMOTO M,MATSUYAMA H,YAMASHIRO T,et al.Separation of ethylene from ethane by a flowing liquid membrane using silver nitrate as a carrier[J].J Membr Sci,1989,46(21):115-136.
[12]MATSUYAMA H,BOKU J,TERAMOTO M.Separation an centration of heavy metal ions by a spiral-type flowing liquid membrane module[J].Water Treatment,1990,5(3):237-252.
[13]林国梁,陈思,白俊智.从含砷工业废水中萃取富集砷的研究[J].沈阳建筑大学学报(自然科学版),2006,22(6):972-976.LIN G L,CHEN S,BAI J Z.Extraction of arsenic from industrial wastewater containing arsenic[J].Journal of Shenyang Construction University(Natual Science Edition),2006,22(6):972-976(in Chinese).
[14]丁琮,陈志良,李核.化学萃取修复砷污染土壤的研究进展[J].土壤通报,2013,44(1):252-256.DING C,CHEN Z L,LI H.Research progress of chemical extraction for remediation of arsenic contaminated soil[J].Soil Bulletin,2013,44(1):252-256(in Chinese).
[15]李彬,赵婵娟,李佩瑶,等.砷矿区受污染土壤中As赋存形态分析[J].云南民族大学学报(自然科学版),2013,22(5):330-333.LI B,ZHAO C J,LI P Y,et al.Speciation analysis of As in contaminated soil in arsenic mine[J].Journal of Yunnan University of Nationalities(Natual Science Edition),2013,22(5):330-333(in Chinese).
[16]PEI L,WANG L M,MA Z Y.Modelling of Ce(Ⅳ)transport through a dispersion combined liquid membrane with carrier p507[J].Frontiers of Environmental Science&Engineering,2014,8(4):503-509.
[17]PEI L,WANG L M,GUO W,et al.Stripping dispersion hollow fiber liquid membrane containing PC-88A as carrier and HCl for transport behavior of trivalent dysprosium[J].Journal of Membrane Science,2011,378(1-2):520-530.
[18]SINGH R,SINGH S,PARIHR P,et al.Arsenic contamination,consequences and remediation techniques:A review[J].Ecotoxicology&Environmental Safety,2014,(112):247-270.
[19]CHAN S,JING L Q,ZHANG W J.A review on heavy metal contamination in the soil worldwide:Situation,impact and remediation techniques[J].Environmental Skeptics&Critics,2014,3(2):24-38.
[20]HE D S,LUO X J,YANG C M,et al.Study of transport and separation of Zn(Ⅱ)by a combined supported liquid membrane/strip dispersion containing D2EHPA in kerosene as the carrier[J].Desalination,2006,194(2):40-51.
[21]DANESI P R.Separation of metal species by supported liquid membrane[J].Separation Science and Technology,1984,19(11):857-894.
[22]DANESI P R,HORWITS E P,RICKERT P G.Transported of Eu2+through a bis(2-ethylhexyl)phosphoric acid,N-Dodecanol solid supported liquid membrane[J].Separation Science&Technology,1982,17(1/2):1183-1192.
[23]YAFTIAN M R,BURGARD M,DIELEMAN C B,et al.Rare earth metal-ion separation using a supported liquid membrane mediated by a narrow rim phosphorylated calix(Ⅳ)arene[J].Journal of Membrane Science,1998,144(1/2):57-64.
[2]杨玉,尹春峰,汤佳乐,等.长沙和株洲地区葡萄园土壤重金属含量分析及污染评价[J].湖南农业科学,2017(8):41-44.YANG Y,YIN CF,TANG J L,et al.Changsha and the Zhuzhou area analysis and evaluation of pollution of soil heavy metals in the vineyard[J].Hunan Agricultural Sciences,2017(8):41-44(in Chinese).
[3]曾睿,胡志鑫,陈丹,等.砷污染土壤修复技术的研究与应用[J].环境与发展,2017,41(7):88-89.ZENG R,HU Z X,CHEN D,et al.Research and application of remediation technology for arsenic contaminated soil[J].Environment and Development,2017,41(7):88-89(in Chinese).
[4]李坚,彭大龙.用溶剂萃取除去铜电解液中砷的研究[J].昆明理工大学学报,1998(3):73-79.LI J,PENG D L.Study on removal of arsenic from copper electrolyte by solvent extraction[J].Journal of Kunming University of Science and Technology,1998(3):73-79(in Chinese).
[5]高雪,曾希柏,白玲玉,等.有机酸对As(Ⅴ)在土壤中老化的影响[J].农业环境科学学报,2017,36(8):1526-1536.GAO X,ZENG X B,BAI L Y,et al.Effects of organic acids on the aging of As(Ⅴ)in soil[J].Journal of Agro Environmental Sciences,2017,36(8):1526-1536(in Chinese).
[6]王瑞永.C923萃取铜电解液中砷和铋的试验研究[J].黄金科学技术,2015,23(1):90-94.WANG R Y.C923 extraction of arsenic and bismuth in copper electrolyte[J].Gold Science and Technology,2015,23(1):90-94(in Chinese).
[7]童长仁,武金朋,李俊朝,等.TBP与N1923协同萃取铜电解液中的砷锑铋[J].有色金属(冶炼部分),2012(5):17-20.TONG C R,WU J P,LI J Z,et al.Co extraction of arsenic,antimony and bismuth in copper electrolyte with TBP and N1923[J].Nonferrous Metals(Smelting Part),2012(5):17-20(in Chinese).
[8]易涛,严纯华,李标国.平板夹心型支撑液膜萃取体系中La3+迁移行为[J].中国稀土学报,1995,13(3):197-200.YI T,YAN C H,LI B G.La3+migration behavior in the support liquid membrane extraction system of flat sandwich type[J].Chinese Journal of Rare Earth,1995,13(3):197-200(in Chinese).
[9]杜启云,王利生,胡新萍.几种支撑液膜组件的结构形式[J].水处理技术,1995,21(5):242-252.DU Q Y,WANG L S,HU X P.Structural forms of several supporting liquid membrane components[J].Water Treatment Technology,1995,21(5):242-252(in Chinese).
[10]TERAMOTO M,TOHNO N,OHNISHI N,et al.Development of a spiral-type flowing liquid membrane module with high stability and its qpplication to the recovery of chromium and zinc[J].Sep Sci Technol,1989,24(7):981-999.
[11]TERAMOTO M,MATSUYAMA H,YAMASHIRO T,et al.Separation of ethylene from ethane by a flowing liquid membrane using silver nitrate as a carrier[J].J Membr Sci,1989,46(21):115-136.
[12]MATSUYAMA H,BOKU J,TERAMOTO M.Separation an centration of heavy metal ions by a spiral-type flowing liquid membrane module[J].Water Treatment,1990,5(3):237-252.
[13]林国梁,陈思,白俊智.从含砷工业废水中萃取富集砷的研究[J].沈阳建筑大学学报(自然科学版),2006,22(6):972-976.LIN G L,CHEN S,BAI J Z.Extraction of arsenic from industrial wastewater containing arsenic[J].Journal of Shenyang Construction University(Natual Science Edition),2006,22(6):972-976(in Chinese).
[14]丁琮,陈志良,李核.化学萃取修复砷污染土壤的研究进展[J].土壤通报,2013,44(1):252-256.DING C,CHEN Z L,LI H.Research progress of chemical extraction for remediation of arsenic contaminated soil[J].Soil Bulletin,2013,44(1):252-256(in Chinese).
[15]李彬,赵婵娟,李佩瑶,等.砷矿区受污染土壤中As赋存形态分析[J].云南民族大学学报(自然科学版),2013,22(5):330-333.LI B,ZHAO C J,LI P Y,et al.Speciation analysis of As in contaminated soil in arsenic mine[J].Journal of Yunnan University of Nationalities(Natual Science Edition),2013,22(5):330-333(in Chinese).
[16]PEI L,WANG L M,MA Z Y.Modelling of Ce(Ⅳ)transport through a dispersion combined liquid membrane with carrier p507[J].Frontiers of Environmental Science&Engineering,2014,8(4):503-509.
[17]PEI L,WANG L M,GUO W,et al.Stripping dispersion hollow fiber liquid membrane containing PC-88A as carrier and HCl for transport behavior of trivalent dysprosium[J].Journal of Membrane Science,2011,378(1-2):520-530.
[18]SINGH R,SINGH S,PARIHR P,et al.Arsenic contamination,consequences and remediation techniques:A review[J].Ecotoxicology&Environmental Safety,2014,(112):247-270.
[19]CHAN S,JING L Q,ZHANG W J.A review on heavy metal contamination in the soil worldwide:Situation,impact and remediation techniques[J].Environmental Skeptics&Critics,2014,3(2):24-38.
[20]HE D S,LUO X J,YANG C M,et al.Study of transport and separation of Zn(Ⅱ)by a combined supported liquid membrane/strip dispersion containing D2EHPA in kerosene as the carrier[J].Desalination,2006,194(2):40-51.
[21]DANESI P R.Separation of metal species by supported liquid membrane[J].Separation Science and Technology,1984,19(11):857-894.
[22]DANESI P R,HORWITS E P,RICKERT P G.Transported of Eu2+through a bis(2-ethylhexyl)phosphoric acid,N-Dodecanol solid supported liquid membrane[J].Separation Science&Technology,1982,17(1/2):1183-1192.
[23]YAFTIAN M R,BURGARD M,DIELEMAN C B,et al.Rare earth metal-ion separation using a supported liquid membrane mediated by a narrow rim phosphorylated calix(Ⅳ)arene[J].Journal of Membrane Science,1998,144(1/2):57-64.