【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。更多还原

【Abstract】 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 R2>0.99.更多还原