改性凹凸棒的制备及对砷离子的吸附研究
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摘要
针对日益严重的砷离子污染问题,本文采用灵敏简便的原子荧光分析法,探究了凹凸棒石粘土吸附剂对砷离子的吸附性能,测定了pH、吸附时间、砷离子的初始浓度等因素对凹凸棒石粘土负载铁氧化物对砷离子吸附能力的影响,并通过SEM、EDX、FTIR对所制得的吸附剂进行了表征研究,同时进行了吸附动力学和吸附等温模型的分析。研究结果表明,改性后的凹凸棒对砷离子的吸附性能有了显著提升,在较低浓度时吸附效率可达98%,该吸附符合Langmuir等温吸附模型和准二级动力学方程。
Arsenic ion pollution has drawn great attention due to its severe destruction of water resources. In this work, attapulgite clay materials and its feasibility for the adsorption of arsenic ions have been investigated. The pH, contact time and initial concentration of arsenic ions were investigated by atomic fluorescence spectrometry on the iron oxide loaded attapulgite clay(Fe_2O_3/ATP). The prepared adsorbent was characterized by SEM, EDX and SEM-EDX mapping. At the same time, the adsorption kinetics and adsorption isotherm model of the prepared adsorbent are analyzed. The results show that the modified attapulgite has a significant increase in the adsorption of arsenic ions, and the adsorption efficiency can reach 98% at a lower concentration. The adsorption conforms to the Langmuir isotherm adsorption model and the pseudo-second-order kinetic equation.
Arsenic ion pollution has drawn great attention due to its severe destruction of water resources. In this work, attapulgite clay materials and its feasibility for the adsorption of arsenic ions have been investigated. The pH, contact time and initial concentration of arsenic ions were investigated by atomic fluorescence spectrometry on the iron oxide loaded attapulgite clay(Fe_2O_3/ATP). The prepared adsorbent was characterized by SEM, EDX and SEM-EDX mapping. At the same time, the adsorption kinetics and adsorption isotherm model of the prepared adsorbent are analyzed. The results show that the modified attapulgite has a significant increase in the adsorption of arsenic ions, and the adsorption efficiency can reach 98% at a lower concentration. The adsorption conforms to the Langmuir isotherm adsorption model and the pseudo-second-order kinetic equation.
引文
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[2] 李定龙, 朱宏飞, 关小红. 吸附法去除饮用水中砷的研究进展[J]. 水资源保护, 2007, 23(6): 44-47. Li D L, Zhu H F, Guan X H. Advances in research of arsenic removal from drinking water by adsorption[J]. Water Resources Protection, 2007, 23(6): 44-47.
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[4] 郑亚棋. 改性水滑石对废水中砷氟的同时去除[D]. 长沙: 湖南农业大学, 2014. Zheng Y Q. Simultaneous removal of coexisting arsenate and fluoride in aqueous solutions by modified layered double hydroxides[D]. Changsha: Hunan Agricultural University, 2014.
[5] 毕伟东,王成艳,王成贤. 砷及砷化物与人类疾病[J]. 微量元素与健康研究, 2002, 19(2): 76-79. Bi W C, Wang C Y, Wang C X. Arsenic and arsenide and human diseases[J]. Trace Elements and Health Research, 2002, 19(2): 76-79.
[6] Wang J, Wang T, Burken J G. Adsorption of arsenic(Ⅴ) onto fly ash:a speciation-based approach[J]. Chemosphere, 2008, 72(3): 381-388.
[7] 周亚光,霍秀静,祝立英. 壳聚糖交联膜电渗析法分离氟、氯、砷的研究[J]. 分子科学学报, 1998, 14(1): 42-49.Zhou Y G, Huo X J, Zhu L Y. The study of chitosan membrane separating F-、Cl- and AsO-2[J]. Journal of Mole-cular Science, 1998, 14(1): 42-49.
[8] Itakura T, Sasai R, Itoh H. Arsenic recovery from water containing arsenite and arsenate ions by hydrothermal mine-ralization[J]. Journal of Hazardous Materials, 2007, 146(1/2): 328-333.
[9] 王颖, 吕斯丹, 李辛. 去除水体中砷的研究进展与展望[J]. 环境科学与技术, 2010, 33(9): 102-107.Wang Y, Lyu S D, Li X. Research advances and prospects in arsenic removal from water[J]. Environmental Science & Technology, 2010, 33(9): 102-107.
[10] 王鸣涛, 李腾, 朱迟. MIEX-DOC(R)离子交换树脂的饮用水除砷研究[J]. 化学与生物工程, 2012, 29(3): 71-74.Wang M T, Li T, Zhu C. Application of MIEX-DOC(R) ion exchange resin in arsenic removal of drinking water[J]. Chemistry & Bioengineering, 2012, 29(3): 71-74.
[11] Hansen H K, Ribeiro A, Mateus E. Biosorption of arsenic(V) with Lessonia nigrescens[J]. Minerals Engineering, 2006, 19(5): 486-490.
[12] 李江, 甄宝勤. 吸附法处理重金属废水的研究进展[J]. 应用化工, 2005, 34(10): 591-594. Li J, Zhen B Q. Progress of research on treatment of heavy metal wastewater by adsorption[J]. Applied Chemical Industry, 2005, 34(10): 591-594.
[13] Zhou Q, Gao Q, Luo W. One-step synthesis of amino-functionalized attapulgite clay nanoparticles adsorbent by hydrothermal carbonization of chitosan for removal of methylene blue from wastewater[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2015, 470: 248-257.
[14] Yang X L, Qiao K X, Ye Y R, Yang M Y, Li J, Gao H X, Zhang S B, Zhou W F, Lu R H. Facile synthesis of multifunctional attapulgite/Fe3O4/polyaniline nanocomposites for magnetic dispersive solid phase extraction of benzoylurea insecticides in environmental water samples[J]. Analytica Chimica Acta, 2016, 934: 114-121.
[15] 谢兆歌, 严子春, 胡家玮. 凹凸棒石的改性及在水处理中的应用[J]. 能源与环境, 2009, 4: 12-14.Xie Z G, Yan Z C, Hu J W. Modification of attapulgite and its application in water treatment[J]. Energy and Environment, 2009, 4: 12-14.
[16] Lin L, Yan X, Liao X. Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform[J]. Journal of Hazardous Materials, 2017, 338: 202-207.
[17] Feng C, Aldrich C, Eksteen J J, Arrigan D W M. Removal of arsenic from alkaline process waters of gold cyanidation by use of γ-Fe2O3@ZrO2 nanosorbents[J]. Hydrometallurgy, 2017, 110: 40-46.
[18] Yu X L, Tong S R, Ge M F, Zuo J C, Cao C Y, Song W G. One-step synthesis of magnetic composites of cellulose@iron oxide nanoparticles for arsenic removal[J]. Journal of Materials Chemistry A, 2012, 1(3): 959-965.
[19] Hao L L, Zheng T, Jiang J P, Zhang G S, Wang P. Removal of As(Ⅲ) and As(Ⅴ) from water using iron doped amino functionalized sawdust: characterization, adsorptive performance and UF membrane separation[J]. Chemical Engineering Journal, 2016, 292: 163-173.
[20] Rusmin R, Sarkar B, Biswas B, Churchman J, Liu Y J, Naidu R. Structural electrokinetic and surface properties of activated palygorskite for environmental application[J]. Applied Clay Science, 2016, 134(2): 95-102.
[2] 李定龙, 朱宏飞, 关小红. 吸附法去除饮用水中砷的研究进展[J]. 水资源保护, 2007, 23(6): 44-47. Li D L, Zhu H F, Guan X H. Advances in research of arsenic removal from drinking water by adsorption[J]. Water Resources Protection, 2007, 23(6): 44-47.
[3] Mandal B K, Suzuki K T. Arsenic round the world: a review[J]. Talanta, 2002, 58(1): 201-235.
[4] 郑亚棋. 改性水滑石对废水中砷氟的同时去除[D]. 长沙: 湖南农业大学, 2014. Zheng Y Q. Simultaneous removal of coexisting arsenate and fluoride in aqueous solutions by modified layered double hydroxides[D]. Changsha: Hunan Agricultural University, 2014.
[5] 毕伟东,王成艳,王成贤. 砷及砷化物与人类疾病[J]. 微量元素与健康研究, 2002, 19(2): 76-79. Bi W C, Wang C Y, Wang C X. Arsenic and arsenide and human diseases[J]. Trace Elements and Health Research, 2002, 19(2): 76-79.
[6] Wang J, Wang T, Burken J G. Adsorption of arsenic(Ⅴ) onto fly ash:a speciation-based approach[J]. Chemosphere, 2008, 72(3): 381-388.
[7] 周亚光,霍秀静,祝立英. 壳聚糖交联膜电渗析法分离氟、氯、砷的研究[J]. 分子科学学报, 1998, 14(1): 42-49.Zhou Y G, Huo X J, Zhu L Y. The study of chitosan membrane separating F-、Cl- and AsO-2[J]. Journal of Mole-cular Science, 1998, 14(1): 42-49.
[8] Itakura T, Sasai R, Itoh H. Arsenic recovery from water containing arsenite and arsenate ions by hydrothermal mine-ralization[J]. Journal of Hazardous Materials, 2007, 146(1/2): 328-333.
[9] 王颖, 吕斯丹, 李辛. 去除水体中砷的研究进展与展望[J]. 环境科学与技术, 2010, 33(9): 102-107.Wang Y, Lyu S D, Li X. Research advances and prospects in arsenic removal from water[J]. Environmental Science & Technology, 2010, 33(9): 102-107.
[10] 王鸣涛, 李腾, 朱迟. MIEX-DOC(R)离子交换树脂的饮用水除砷研究[J]. 化学与生物工程, 2012, 29(3): 71-74.Wang M T, Li T, Zhu C. Application of MIEX-DOC(R) ion exchange resin in arsenic removal of drinking water[J]. Chemistry & Bioengineering, 2012, 29(3): 71-74.
[11] Hansen H K, Ribeiro A, Mateus E. Biosorption of arsenic(V) with Lessonia nigrescens[J]. Minerals Engineering, 2006, 19(5): 486-490.
[12] 李江, 甄宝勤. 吸附法处理重金属废水的研究进展[J]. 应用化工, 2005, 34(10): 591-594. Li J, Zhen B Q. Progress of research on treatment of heavy metal wastewater by adsorption[J]. Applied Chemical Industry, 2005, 34(10): 591-594.
[13] Zhou Q, Gao Q, Luo W. One-step synthesis of amino-functionalized attapulgite clay nanoparticles adsorbent by hydrothermal carbonization of chitosan for removal of methylene blue from wastewater[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2015, 470: 248-257.
[14] Yang X L, Qiao K X, Ye Y R, Yang M Y, Li J, Gao H X, Zhang S B, Zhou W F, Lu R H. Facile synthesis of multifunctional attapulgite/Fe3O4/polyaniline nanocomposites for magnetic dispersive solid phase extraction of benzoylurea insecticides in environmental water samples[J]. Analytica Chimica Acta, 2016, 934: 114-121.
[15] 谢兆歌, 严子春, 胡家玮. 凹凸棒石的改性及在水处理中的应用[J]. 能源与环境, 2009, 4: 12-14.Xie Z G, Yan Z C, Hu J W. Modification of attapulgite and its application in water treatment[J]. Energy and Environment, 2009, 4: 12-14.
[16] Lin L, Yan X, Liao X. Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform[J]. Journal of Hazardous Materials, 2017, 338: 202-207.
[17] Feng C, Aldrich C, Eksteen J J, Arrigan D W M. Removal of arsenic from alkaline process waters of gold cyanidation by use of γ-Fe2O3@ZrO2 nanosorbents[J]. Hydrometallurgy, 2017, 110: 40-46.
[18] Yu X L, Tong S R, Ge M F, Zuo J C, Cao C Y, Song W G. One-step synthesis of magnetic composites of cellulose@iron oxide nanoparticles for arsenic removal[J]. Journal of Materials Chemistry A, 2012, 1(3): 959-965.
[19] Hao L L, Zheng T, Jiang J P, Zhang G S, Wang P. Removal of As(Ⅲ) and As(Ⅴ) from water using iron doped amino functionalized sawdust: characterization, adsorptive performance and UF membrane separation[J]. Chemical Engineering Journal, 2016, 292: 163-173.
[20] Rusmin R, Sarkar B, Biswas B, Churchman J, Liu Y J, Naidu R. Structural electrokinetic and surface properties of activated palygorskite for environmental application[J]. Applied Clay Science, 2016, 134(2): 95-102.