环氧氯丙烷和半胱氨酸改性的蔗渣对镉(Ⅱ)的吸附

Adsorption of Cd(Ⅱ) by Epichlorohydrin and Cysteine Modified Bagasse

利用环氧氯丙烷和半胱氨酸对蔗渣进行改性制备新型吸附剂。研究了改性蔗渣(MB)对Cd2+的吸附行为并用FTIR表征了MB。结果表明,MB含有的羧基有利于脱除废水中的Cd2+,其吸附行为符合Langmuir模型,低温有利于MB吸附反应的进行。在实验范围内,25℃时MB对Cd2+处理的最大饱和吸附量Qmax为1.092mmol/g,而蔗渣仅为0.233 mmol/g。

A new adsorbent was obtained by modifying bagasse with epichlorohydrin and cysteine.Its adsorption behaviors for Cd2＋ was studied.FTIR was used to determine the characteristics of modified-bagasse（MB）.The results showed that MB covered with carboxyl group,which was beneficial to removing Cd2＋ from wastewater.Its adsorption behavior was better in accordance with Langmuir mode,and lower temperature was favorable for the process of adsorption.In the range of experiments,MB can reach a maximum saturated adsorption capacity（Qmax） of 1.092 mmol/g,compared with 0.233 mmol/g of bagasse for Cd2＋ at 25℃.The adsorption property of MB had been enhanced obviously,which could be utilized as a potential metal ion adsorbent.