硝酸改性活性炭对镉离子的吸附和再生
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摘要
用硝酸氧化改性活性炭吸附Cd(Ⅱ)。结果表明,硝酸氧化改性后,活性炭对溶液中Cd(Ⅱ)的吸附性能提高,吸附过程符合Langmuir、Freundlich模型,吸附动力学能很好地用拟二级动力学模型拟合。XPS分析表明,Cd(Ⅱ)与活性炭表面含氧官能团发生络合作用。EDTA-2Na浓度0. 10 mol/L,再生温度40℃,再生时间4 h条件下,活性炭可有效再生。
HNO_3 oxidation modification of activated carbon( AC) on Cd( Ⅱ) adsorption was investigated.The regeneration method of HNO_3-modified activated carbon( HNO_3-AC) was also studied. HNO_3-AC showed an increased adsorption capacities in removal of Cd( Ⅱ). The adsorption behaviour obeyed two isotherm models such as Langmuir and Freundlich. The adsorption kinetic was found to fit well with a pseudo-second-order rate equation. XPS synthesis showed that the oxygen-containing functional groups on the surface of HNO_3-AC were complexed with Cd( Ⅱ). The optimal operation parameters were shown as follows: 0. 10 mol/L of concentration of EDTA-2 Na,40 ℃ of regeneration temperature,and 4 h of regeneration time. Under the optimized condition,HNO_3-AC can be effectively regenerated.
HNO_3 oxidation modification of activated carbon( AC) on Cd( Ⅱ) adsorption was investigated.The regeneration method of HNO_3-modified activated carbon( HNO_3-AC) was also studied. HNO_3-AC showed an increased adsorption capacities in removal of Cd( Ⅱ). The adsorption behaviour obeyed two isotherm models such as Langmuir and Freundlich. The adsorption kinetic was found to fit well with a pseudo-second-order rate equation. XPS synthesis showed that the oxygen-containing functional groups on the surface of HNO_3-AC were complexed with Cd( Ⅱ). The optimal operation parameters were shown as follows: 0. 10 mol/L of concentration of EDTA-2 Na,40 ℃ of regeneration temperature,and 4 h of regeneration time. Under the optimized condition,HNO_3-AC can be effectively regenerated.
引文
[1]李思彤,舒芳芳,王楠,等.血粉对废水中镉离子的高效去除效应[J].环境工程学报,2017,11(9):5001-5006.
[2]喻涌泉,黄魏魏,董建江,等.硝基还原假单胞菌吸附重金属镉的机理研究[J].中国环境科学,2017,37(6):2232-2238.
[3] Zhu W P,Sun S P,Gao J,et al. Dual-layer polybenzimidazole/polyethersulfone(PBI/PES)nanofiltration(NF)hollow fiber membranes for heavy metals removal from wastewater[J]. Journal of Membrane Science,2014,456(7):117-127.
[4]王竞峰,王欣,成家杨,等. 3种海洋硅藻藻粉吸附水中镉离子特性研究[J].环境科学学报,2017,37(12):4549-4561.
[5] Singanan M,Peters E. Removal of toxic heavy metals from synthetic wastewater using a novel biocarbon technology[J]. Journal of Environmental Chemical Engineering,2013,1(4):884-890.
[6]吐尔逊·吐尔洪,帕提古丽·伊克木,阿热祖古丽·达吾提,等.玉米秸秆基改性生物质活性炭对Cd的吸附特性[J].环境污染与防治,2018,40(2):189-192,197.
[7]范少蓓,许仕荣,文武.氧化锰改性活性炭的优化制备及其对Cd(II)的吸附研究[J].环境工程,2017,35(5):34-39.
[8] Yin C Y,Aroua M K,Daud W M A W. Review of modifications of activated carbon for enhancing contaminant uptakes from aqueous solutions[J]. Separation and Purification Technology,2007,52(3):403-415.
[9]范明霞,童仕唐,陈东东.氨改性中孔活性炭对Pb(II)的吸附[J].环境工程学报,2014,8(12):5197-5203.
[10]袁潇,陈代伟,徐进勇.分光光度法测定锌-锰电镀液中微量镉[J].电镀与环保,2012,32(3):52-53.
[11]代淑娟.生物吸附法去除电镀废水中镉的研究[D].沈阳:东北大学,2008.
[12] Wang H J,Zhou A,Peng F,et al. Mechanism study on adsorption of acidified multiwalled carbon nanotubes to Pb(II)[J]. Journal of Colloid and Interface Science,2007,316:277-283.
[13] Biniak S,Szymanski G,Siedlewski J,et al. The characterization of activated carbons with oxygen and nitrogen surface groups[J]. Carbon,1997,35(12):1799-1810.
[14] Heidari A,Younesi H,Mehraban Z,et al. Selective adsorption of Pb(II),Cd(II),and Ni(II)ions from aqueous solution using chitosan-MAA nanoparticles[J]. International Journal of Biological Macromolecules,2013,61:251-263.
[15] Ertugay N,Bayhan Y K. The removal of copper(II)ion by using mushroom biomass(Agaricus bisporus)and kinetic modelling[J]. Desalination,2010,255(1/2/3):137-142.
[16]顾卫荣,牟豪杰,张树峰.正交法优选废弃全氟磺酸离子膜化学再生工艺研究[J].现代化工,2012,32(7):77-80.
[2]喻涌泉,黄魏魏,董建江,等.硝基还原假单胞菌吸附重金属镉的机理研究[J].中国环境科学,2017,37(6):2232-2238.
[3] Zhu W P,Sun S P,Gao J,et al. Dual-layer polybenzimidazole/polyethersulfone(PBI/PES)nanofiltration(NF)hollow fiber membranes for heavy metals removal from wastewater[J]. Journal of Membrane Science,2014,456(7):117-127.
[4]王竞峰,王欣,成家杨,等. 3种海洋硅藻藻粉吸附水中镉离子特性研究[J].环境科学学报,2017,37(12):4549-4561.
[5] Singanan M,Peters E. Removal of toxic heavy metals from synthetic wastewater using a novel biocarbon technology[J]. Journal of Environmental Chemical Engineering,2013,1(4):884-890.
[6]吐尔逊·吐尔洪,帕提古丽·伊克木,阿热祖古丽·达吾提,等.玉米秸秆基改性生物质活性炭对Cd的吸附特性[J].环境污染与防治,2018,40(2):189-192,197.
[7]范少蓓,许仕荣,文武.氧化锰改性活性炭的优化制备及其对Cd(II)的吸附研究[J].环境工程,2017,35(5):34-39.
[8] Yin C Y,Aroua M K,Daud W M A W. Review of modifications of activated carbon for enhancing contaminant uptakes from aqueous solutions[J]. Separation and Purification Technology,2007,52(3):403-415.
[9]范明霞,童仕唐,陈东东.氨改性中孔活性炭对Pb(II)的吸附[J].环境工程学报,2014,8(12):5197-5203.
[10]袁潇,陈代伟,徐进勇.分光光度法测定锌-锰电镀液中微量镉[J].电镀与环保,2012,32(3):52-53.
[11]代淑娟.生物吸附法去除电镀废水中镉的研究[D].沈阳:东北大学,2008.
[12] Wang H J,Zhou A,Peng F,et al. Mechanism study on adsorption of acidified multiwalled carbon nanotubes to Pb(II)[J]. Journal of Colloid and Interface Science,2007,316:277-283.
[13] Biniak S,Szymanski G,Siedlewski J,et al. The characterization of activated carbons with oxygen and nitrogen surface groups[J]. Carbon,1997,35(12):1799-1810.
[14] Heidari A,Younesi H,Mehraban Z,et al. Selective adsorption of Pb(II),Cd(II),and Ni(II)ions from aqueous solution using chitosan-MAA nanoparticles[J]. International Journal of Biological Macromolecules,2013,61:251-263.
[15] Ertugay N,Bayhan Y K. The removal of copper(II)ion by using mushroom biomass(Agaricus bisporus)and kinetic modelling[J]. Desalination,2010,255(1/2/3):137-142.
[16]顾卫荣,牟豪杰,张树峰.正交法优选废弃全氟磺酸离子膜化学再生工艺研究[J].现代化工,2012,32(7):77-80.