摘要
研究了初始砷浓度和pH值对氢氧化铝吸附砷（Ⅴ）的影响．结果表明，氢氧化铝对砷的吸附与pH值有关：在弱酸性到弱碱性条件下，氢氧化铝吸附砷的能力最强．在低初砷浓度（0.00001～0.001mol／L）和相同pH值条件下，吸附效率随砷浓度的增加而减小．当pH=3、7和12时，吸附等温线都可以用Freundlich公式来进行拟合。相关系数R^2〉0．99．
aluminum The effect of the solution pH and initial arsenic concentration on adsorption of arsenic （Ⅴ） onto hydroxide is studied experimentally. The results show that the sorption capacity is related to the solution pH. At the pH around neutral, the sorption capacity reaches the largest value. Under certain pH condition, the adsorption percentage decreases with the increasing arsenic concentration for the initial solution containing arsenic between 0. 000 01 mol/L and 0. 001 mol/L. The adsorption isotherm at pH = 3, 7 and 12 can be well fitt using the Freundlich model with the relationship coefficient R^2〉0. 99.
出处
《桂林工学院学报》
北大核心
2006年第4期547-550,共4页
Journal of Guilin University of Technology
基金
教育部留学回国人员科研启动基金(教外司留2003-14)
广西高校百名中青年学科带头人资助计划项目(桂教人2003-97)
广西"新世纪十百千人才工程"专项资助项目(2004217)
关键词
氢氧化铝
吸附
砷
等温线
aluminum hydroxide
adsorption
arsenic
isothermal
