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《Urban Environment & Urban Ecology》 2011-06
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Preparation of Modified Quartz Sand and Its Influence Factors of Adsorption for Zn~(2+)

MIAO Jia1,XU Zhao-ran1,FU Jing1,NI Ting2(1.College of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310014,China; 2.Environmental Monitoring Station of Jiashan County,Jiashan Zhejiang 314100,China)  
In order to improve the efficiency of adsorption,quartz sand was modified with the chemical and physical methods.In this experiment quartz sand was chosen as a carrier to be coated by magnesium salt with the deposition process at alkaline condition,and then the adsorption capability and influencing factors for zinc removal by magnesium salt modified sand were investigated respectively.The experimental results showed that the specific surface area of magnesium salt modified sand was 1.475 m2/g,and it was 6.12 times of raw quartz sand.Under the condition of pH value 7.00,the removal of Zn2+ by raw quartz sand was approximately 41%,in contrast,the removal efficiency reached 54% by magnesium salt modified sand.The adsorption effects of magnesium salt modified sand was better than raw quartz sand.It was also found that the removal rate of Zn2+ by the magnesium salt modified sand reduced with the increase of initial concentration of Zn2+.And the removal rate of Zn2+ enhanced with the increase of pH value,with the Zn2+ removal of almost 95% under the condition of pH value 9.0.
【Fund】: 浙江省科技计划项目资助(2007C33056)
【CateGory Index】: X703
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