改性兰炭基活性炭对镉离子的吸附研究  

Study on Adsorption Performance of Modified Activated Carbon for Cd2+

作　　者：段珍珍 慕苗[1,2] 高晶晶 白瑞[1,2] 白雪 亢玉红[1,2] DUAN Zhen-zhen;MU Miao;GAO Jing-jing;BAI Rui;BAI Xue;KANG Yu-hong(School of Chemistry and Chemical Engineering,Yulin University,Yulin Shaanxi 719000,China;Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin Shaanxi 719000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]陕西省低变质煤重点实验室,陕西榆林719000

出　　处：《辽宁化工》2022年第10期1349-1352,1361,共5页Liaoning Chemical Industry

基　　金：国家自然科学基金(项目编号:22068038);陕西省教育厅重点实验室科研计划项目(项目编号:20JS162);陕西省教育厅项目(项目编号:20JK1018);榆林市科技局项目(项目编号:CXY-2020-006),(CXY-2021-101-02)。

摘　　要：兰炭的固废综合利用对提高资源利用率、改善环境质量有重要意义,有助于实现“碳达峰”、“碳中和”目标。以兰炭基活性炭为前驱体,采用硝酸改性兰炭基活性炭表面,通过扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)表征结果可以看出,改性兰炭基活性炭表面有活性炭基团存在,且结构松散。结果表明兰炭基活性炭经酸改性的最优的条件为改性时间4 h,硝酸质量浓度为0.08 g·mL^(-1),改性温度为50℃,去除率可达94%,且吸附过程中满足二级动力学吸附特征。The comprehensive utilization of solid waste of blue carbon is of great significance to improve the utilization rate of resources and environmental quality, and is helpful to realize the goal of “Carbon peak” and “Carbon neutrality”. The surface of blue carbon-based activated carbon was modified by nitric acid using blue carbon-based activated carbon as precursor. The surface was characterized by scanning electron microscope and FT-IR. The results showed that the surface of modified blue carbon-based activated carbon had the presence of activated carbon groups, and the structure was loose. The optimum conditions of acid modification of blue carbon-based activated carbon were as follows: modification time 4 h, the mass concentration of nitric acid 0.08 g·mL^(-1), modification temperature 50 ℃. Cdremoval rate reached 94%, and the adsorption process satisfied the second-order kinetic adsorption characteristics.

关 键 词：兰炭 活性炭 镉离子 吸附 动力学 

分 类 号：TQ424.1[化学工程]