废弃生物质对模拟废水中锌的吸附研究

Adsorption Study of Zn^(2+) from Simulated Wastewater Solutions by Abandoned Biomass

本文研究初始金属离子浓度、溶液pH值、吸附剂用量等因素对碧根果壳吸附Zn2+的影响。结果表明:Zn2+的吸附量受pH值影响,随着pH值升高而增多,其中在pH=8时,吸附量最大。随生物质吸附剂用量的增加,Zn2+的去除率逐渐升高。SEM和FTIR分析可知生物质表面含有羟基、羧基、Si—O等官能团为生物质吸附Zn2+提供便利。

In this study,the effects of initial metal ion concentration,pH value and adsorbent of pecan shell on the ad⁃sorption of Zn^(2+)were researched.The results show that the adsorption capacity of Zn^(2+)is affected by pH value and in⁃creased with the increase of pH value;when the pH value is equal to 8,the adsorption capacity reaches the maxi⁃mum.With the increase of the amount of biomass adsorbent,the removal rate of Zn^(2+)is increased gradually.It can be seen that the surface of biomass contained hydroxyl,carboxyl,Si-O and other functional groups can facilitate the ad⁃sorption of Zn^(2+)according to SEM and FTIR analysis.