ADSORPTION OF NICKEL ION BY ZEOLITE-ATTAPULGITE COMPOSITE NANO-SIZE ADSORBENT
The removal of Ni(Ⅱ) from aqueous solution by batch adsorption technique using a zeolite-attapulgite composite nano-size adsorbent was investigated. After elementary characterization of this adsorbent, the influence of adsorbent concentration, initial Ni(Ⅱ) concentration, pH, contact time and temperature on the selectivity and sensitivity of the removal process were investigated. Results showed that this absorbent was indeed nanoporous. Increase in adsorbent dosage led to increase in Ni(Ⅱ) adsorption due to increased number of adsorption sites. Langmuir model fitted the experimental data better than Freundlich model. Adsorption process was found to be highly pH dependent. The optimum pH range for adsorption of Ni(Ⅱ) was found to be >10.Adsorption equilibrium attained within 2 h time. The sorption of Ni(Ⅱ) increased with rise of temperature.
nickel (Ⅱ) zeolite attapulgite langmuir isotherm nano-size adsorbent
Wang Zheng Zhang Lin-sheng Jing Zhao-qian
Department of Environmental Science and Engineering Southeast University Nanjing,P.R.China;School of Department of Environmental Science and Engineering Southeast University Nanjing,P.R.China School of Civil Engineering Nanjing Forestry University Nanjing,P.R.China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）