氢氧化铁对砷的吸附研究  

ABSORPTION OF ARSENIC BY FERRIC HYDROXIDE

作　　者：梁美娜[1] 朱义年[1] 刘海玲[2] 刘辉利[1] 

机构地区：[1]桂林工学院资源与环境工程系,广西桂林541004 [2]桂林工学院材料与化学工程系,广西桂林541004

出　　处：《水处理技术》2006年第7期32-35,共4页Technology of Water Treatment

基　　金：教育部留学回国人员科研启动基金(2003-14);广西高校百名中青年学科带头人资助计划(2003-97)

摘　　要：本文研究了As(Ⅴ)初始浓度和pH值对氢氧化铁吸附砷的影响。结果表明,氢氧化铁对砷的吸附能力与pH有关。在弱酸性到弱碱性条件下,吸附砷的能力最强;在低初始砷浓度(0.00001～0.001mol/L)和相同pH条件下,吸附率随砷浓度增高而增大;当pH=3、7和12时,吸附等温线都可用Freundlich公式进行拟合,相关系数R2>0.99。The effect of the solution pH and initial arsenic concentration on the adsorption of arsenic（V） onto ferric hydroxide was studied. The results showed that the sorption capacity was related to the solution pH. At the pH around neutral, the sorption capacity reached the maximum value. Under certain pH condition, the adsorption percentage increased with the increasing arsenic concentration for the initial solution containing arsenic between 0.00001 and 0.001mol/L. The adsorption isotherm at pH=3, 7 and 12 could be well fitted using the Freundlich model with the relationship coefficient R^2〉0.99.

关 键 词：氢氧化铁 吸附 砷 等温线 

分 类 号：TQ424[化学工程]