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环境化学  2015 

镉对砷在二氧化钛上吸附性能的影响

Keywords: 二氧化钛,,,共吸附,沉淀

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Abstract:

研究了镉与砷共吸附在二氧化钛(TiO2)上的吸附机理以及镉对砷吸附的影响,通过宏观吸附试验、红外光谱(ATR-FTIR)、表面增强拉曼(SERS)、Zeta电位表征和电荷分布多位络合模型(Charge-distributionmultisitecomplexationmodel,CD-MUSIC)得到单砷及砷镉在TiO2上的表面络合形态和镉对砷吸附的影响.结果表明,浓度为As=10mg·L-1,Cd=75mg·L-1的砷镉在溶液中不会形成络合物.镉会促进砷在TiO2上的吸附,其机理为在低浓度及高浓度低pH值(pH3—5)下主要是形成表面络合物;在高浓度高pH值(pH>5)下主要是形成Cd3(AsO4)2沉淀.

References

[1]  李大成.国家饮用水标准与砷、镉去除技术[J]. 污染防治技术,2009,22(2):74-76
[2]  Rietra R P J J, Hiemstra T, Van Riemsdijk W H. Interaction between calcium and phosphate adsorption on goethite [J]. Environ Sci Technol, 2001, 35: 3369-3374
[3]  崔金立,罗婷,景传勇.一种用于吸附重金属的纳米二氧化钛的合成方法与应用:中国, 专利申请号:200910238505,2009
[4]  Myneni S, Traina S J, Waychunas G A, et al. Experimental and theoretical vibrational spectroscopic evaluation of arsenate coordination in aqueous solutions, solids and mineral-water interfaces [J]. Geochimica et Cosmochimica Acta,1998, 62: 3285-3300
[5]  Guan H X, Ma J, Dong H R, et al. Removal of arsenic from water: Effect of calcium ions on As(Ⅲ) in the KMnO4-Fe(Ⅱ) process [J]. Water Research,2009, 43: 5119-5128
[6]  鞠海燕,黄春文,罗文海,等.金属矿山酸性废水危害及治理技术的现状与对策[J]. 中国钨业,2008,23(2):41-44
[7]  Luo T, Cui J L, Hu S, et al. Arsenic removal and recovery from copper smelting wastewater using TiO2 [J]. Environ Sci Technol, 2010, 44: 9094-9098
[8]  Wu Y Q, Zhao B, Xu W Q, et al. Near-infrared surface-enhanced raman scattering study of ultrathin films of azobenzence-containing long-chain fatty acids on a sliver surface prepared by silver mirror and nitric acid etched silver foil methods [J]. Langmuir,1999, 15: 4625-4629
[9]  Xu Z H, Hao J M, Li F S, et al. Surface-enhanced raman spectroscopy of arsenate and arsenite using Ag nanofilm prepared by modified mirror reaction [J]. Journal of Colloid and Interface Science,2010, 347: 90-95
[10]  Ronson T K, McQuillan A J. Infrared spectroscopic study of calcium and phosphate ion coadsorption and of brushite crystallization on TiO2 [J]. Langmuir,2002, 18: 5019-5022
[11]  Oh C Y, Yoon S, Kim E. Non-destructive determination of TiO2 concentration in cream formulation using Raman spectroscopy [J]. Journal of Pharmaceutical and Biomedical Analysis, 2010, 53: 762-766
[12]  Pena M, Meng X G, Korfiatis G P, et al. Adsorption mechanism of arsenic on nanocrystalline titanium dioxide [J]. Environ Sci Technol, 2006, 40: 1257-1262
[13]  Wei J H, Leng C J, Zhang X Z, et al. Synthesis and magnetorheological effect of Fe3O4-TiO2 nanocomposite [J]. Journal of Physics: Conference Series,2009, 149: 012083
[14]  Liu J H, Zhang Y H, Wang L J, et al. Drawing out the structural information of the first layer of hydrated ions: ATR-FTIR spectroscopic studies on aqueous NH4NO3, NaNO3, and Mg(NO3)2 solutions [J]. Spectrochimica Acta Part A,2005, 61: 893-899
[15]  Jing C Y, Liu S Q, Patel M, et al. Arsenic leachability in water treatment adsorbents [J]. Environ Sci Technol, 2005, 39: 5481-5487
[16]  Weerasooriya R, Wijesekara H K D K, Bandara A. Surface complexation modeling of cadmium adsorption on gibbsite [J]. Colloids and Surfaces A: Physicochem Eng Aspects,2002, 207: 13-24
[17]  Speight J G. Lange's Handbook of Chemistry (16th Edition)[M]. 2005, 1.242
[18]  Jing C Y, Meng X G, Liu S Q, et al. Surface complexation of organic arsenic on nanocrystalline titanium oxide [J]. Journal of Colloid and Interface Science,2005, 290: 14-21

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