Competitive adsorption behavior and mechanism of loess towards Pb(II), Cu(II) and Cd(II)
LIU Jing-jing1, TANG Xiao-wu1, WANG Yan2
1. Research Center of Costal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2. Faculty of Architecture, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China
Abstract：Lead, copper, cadmium is three kinds of typical heavy metal contaminants which can be used to simulate the solution of composite contaminate. The factors including the concentration and soil-water ratio are studied to investigate the competitive adsorption behaviors of loess towards Pb(II), Cu(II) and Cd(II). The adsorption test results can be interpreted by three isotherm models (i.e., Langmuir, Freundlich and D-R models) to certain extent. The preference ranking of loess to three heavy metal ions is Pb(II)>Cu(II)>Cd(II). Compared with those of single adsorption, the adsorption capacities of the competitive ions on loess decrease to some extent. Higher initial concentration of heavy metal ions leads to larger optimum adsorption amount of loess, and the adsorption removal efficiency decreases at the same time. The removal efficiency of three heavy metal ions from aqueous solution can be increased by increasing the solid-liquid ratio. The results may provide an evidence for loess as the containment barrier system as well as the adsorbent removing heavy metal containment in aquatic environment.
刘晶晶, 唐晓武, 王艳. Pb(II)、Cu(II)、Cd(II)在黄土上二元竞争吸附特性研究[J]. 岩土工程学报, 2014, 36(2): 327-333.
LIU Jing-jing, TANG Xiao-wu, WANG Yan. Competitive adsorption behavior and mechanism of loess towards Pb(II), Cu(II) and Cd(II). Chinese J. Geot. Eng., 2014, 36(2): 327-333.
[1] SARADA B, PRASAD M K, KUMAR K K, et al. Potential use of leaf biomass, araucaria heterophylla for removal of Pb+2[J]. International Journal of Phytoremediation, 2013, 15(8): 756-773. [2] DIXIT S, SINGH D P. Phycoremediation of lead and cadmium by employing nostoc muscorum as biosorbent and optimization of its biosorption potential[J]. International Journal of Phytoremediation, 2013, 15(8): 801-813. [3] CERINO-CORDOVA F J, DIAZ-FLORES P E, GARCIA-REYES R B, et al. Biosorption of Cu(II) and Pb(II) from aqueous solutions by chemically modified spent coffee grains[J]. International Journal of Environmental Science and Technology, 2013, 10(3): 611-622. [4] SHAHBAZI A, YOUNESI H, BADIEI A. Batch and fixed-bed column adsorption of Cu(II), Pb(II) and Cd(II) from aqueous solution onto functionalised SBA-15 mesoporous silica[J]. Canadian Journal of Chemical Engineering, 2013, 91(4): 739-750. [5] CHEN G Q, GUAN S, ZENG G M, et al. Cadmium removal and 2, 4-dichlorophenol degradation by immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticles[J]. Applied Microbiology and Biotechnology, 2013, 97(7): 3149-3157. [6] GB3838—2002 地表水环境质量标准[S]. 2002. (GB3838—2002 Environmental quality standard for surface water[S]. 2002. (in Chinese)) [7] GB8978—1996 污水综合排放标准[S]. 1996. (GB8978—1996 Integrated water discharge standard[S]. 1996. (in Chinese)) [8] 郭 鸿, 骆亚生, 李广冬. 考虑地区差异性的饱和黄土三轴渗透试验研究[J]. 中国农村水利水电, 2009(10): 112-114. (GUO Hong, LUO Ya-sheng, LI Guang-dong. Experimental research on triaxial seepage test of saturated loess based on regional differences[J]. China Rural Water and Hydropower, 2009(10): 112-114. (in Chinese)) [9] LI Z Z, TANG X W, CHEN Y M, et al. Sorption behavior and mechanism of Pb(II) on Chinese loess[J]. Journal of Environmental Engineering-ASCE, 2009, 135(1): 58-67. [10] TANG X W, LI Z Z, CHEN Y M, et al. Removal of Zn(II) from aqueous solution with natural Chinese loess: behaviors and affecting factors[J]. Desalination, 2009, 249(1): 49-57. [11] TANG X W, LI Z Z, CHEN Y M, et al. Removal of Cu(II) from aqueous solution by adsorption on Chinese quaternary loess: kinetics and equilibrium studies[J]. Journal of Environmental Science and Health Part A, 2008, 43(7): 1-13. [12] WANG Y, TANG X W, CHEN Y M, et al. Adsorption behavior and mechanism of Cd(II) on loess soil from China[J]. Journal of Hazardous Materials, 2009, 172(1): 30-37. [13] 王 艳, 唐晓武, 王恒宇, 等. 重金属Mn(II)在黄土上的吸附和解吸特性研究[J]. 岩土工程学报, 2011, 33(增刊1)： 369-373. (WANG Yan, TANG Xiao-wu, WANG Heng-yu, et al. Sorption and desorption behaviors of heavy metal Mn(II) on loess soil[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(S1): 369-373. (in Chinese)) [14] 王 艳, 唐晓武, 刘晶晶, 等. 黄土对锰离子的吸附特性及机理研究[J]. 岩土工程学报, 2012, 34(12): 2292-2298. (WANG Yan, TANG Xiao-wu, LIU Jing-jing, et al. Adsorption behavior and mechanism of loess soil towards manganese ions[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(12): 2292-2298. (in Chinese)) [15] GILES C H, SMITH D, HUITSON A. A general treatment and classification of the solute sorption isotherms. I. Theoretical[J]. Journal of Colloid and Interface Science, 1974, 47(3): 755-765. [16] DO D D. Adsorption analysis: equilibria and kinetics[M]. London: Imperical College Press, 1998. [17] ÖZCAN A, ÖNCÜ E M, ÖZCAN A S. Kinetics, isotherm and thermodynamic studies of adsorption of Acid Blue 193 from aqueous solutions onto natural sepiolite[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006, 277(1/2/3): 90-97. [18] COVELO E F, ANDRADE M L, VEGA F A. Heavy metal adsorption by humic umbrisols: selectivity sequences and competitive sorption kinetics[J]. Journal of Colloid and Interface Science, 2004, 280(1): 1-8. [19] DIJKSTRA J J, MEEUSSEN J C L, COMANS R N J. Leaching of heavy metals from contaminated soils: An experimental and modeling study[J]. Environmental Science and Technology, 2004, 38(16): 4390-4395. [20] VIDAL M, SANTOS M J, ABRAO T, et al. Modeling competitive metal sorption in a mineral soil[J]. Geoderma, 2009, 149(3/4): 189-198.
