【摘要】 通过γ-氯丙基三甲氧基硅烷的媒介,将聚乙烯亚胺(PEI)偶联接枝到硅胶微粒表面,制备了复合型螯合吸附材料PEI/SiO2;研究了PEI/SiO2对Cu2+的吸附性能。复合型螯合吸附材料PEI/SiO2对Cu2+具有强的螯合吸附能力;等温吸附数据符合Langmuir方程,且吸附量随温度升高而增大;pH对吸附量有很大的影响,pH 7时,吸附量最高。更多还原

【Abstract】 PEI was grafted on silica particles using γ-chloropropyl trimethoxy silane as couplant,and the composite and chelating adsorption material of PEI/SiO2 was prepared.The adsorption properties of PEI/SiO2 for Cu2+ were investigated.PEI/SiO2 possesses strong chelation adsorption ability for Cu2+,and the adsorption rate is fast.The data of isothermal adsorption matched well with Langmuir equation.As the adsorption amount increased with increasing,the chelating adsorption is likely to be an endothermic process.The value of pH had a great influence on the adsorption amount,and there was a maximum at pH 7.更多还原