摘要
柚子皮(PP)通过二硫化碳改性制备改性柚子皮XPP。考察溶液pH、温度、浓度和时间对其从水溶液中吸附Cr(Ⅵ)的影响。同等条件下XPP比APP的吸附量提高。最佳的溶液pH值为1.0,升温有利于吸附的进行。XPP对Cr(Ⅵ)的吸附量随溶液浓度的增加而增加,吸附符合Langmuir吸附模型,XPP在40℃最大吸附量为16.67 mg/g;吸附在300 min时基本上达到平衡,吸附符合准二级动力学方程。
Pomelo peel(PP) was modified with disulfide to prepare sulfated pomelo peel bioabsorbent( XPP). The effects of solution pH,temperature,metal ion concentration and adsorption time on the adsorption properties of Cr(Ⅵ) from aqueous solution were investigated. After modification,the adsorption capacity of XPP was higher than that of APP under the same conditions. The results showed that the optimum solution pH was 1. 0 and increasing temperature was conducive to the adsorption. The adsorption amount of XPP on Cr(Ⅵ) increased with the increase of metal ion concentration in solution.The adsorption isotherm was in accordance with the Langmuir monolayer adsorption model. The maximum adsorption capacity of XPP to Cr(Ⅵ) was 16. 67 mg/g at 40 ℃. The adsorption of Cr(Ⅵ) by XPP reached the adsorption equilibrium at 300 min,and the adsorption kinetics was consistent with the quasi-second-order kinetic equation.
出处
《广州化工》
CAS
2018年第4期62-64,共3页
GuangZhou Chemical Industry
基金
广东省省级大学生创新创业训练计划项目(201710573041)
广东省医学科研基金(A2017151)
