中药渣生物炭的制备及其对水中六价铬离子的吸附实验研究  

Experimental Study on the Adsorption of Hexavalent Chromium ions by Chinese Medicinal Residue Biochar

作　　者：韩耀霞[1] 周南丁 马旭光[1] 成英[1] HAN Yaoxia;ZHOU Nanding;MA Xuguang;CHENG Ying(School of New Energy Materials and Chemistry,Leshan Normal University,Leshan Sichuan 614000,China;College of Resources,Sichuan Agricultural University,Chengdu Sichuan 611130,China)

机构地区：[1]乐山师范学院新能源材料与化学学院,四川乐山614000 [2]四川农业大学资源学院,四川成都611130

出　　处：《乐山师范学院学报》2023年第4期40-45,共6页Journal of Leshan Normal University

基　　金：四川省教育厅项目“新型硅钙材料与生物质修复重金属污染土壤试点研究”(16ZB0293);乐山师范学院校级项目“基于应用型人才培养模式的‘大气污染控制工程’课程体系建设与研究”(KG2020113)。

摘　　要：研究不仅能够解决水中六价铬离子污染问题也可以解决中药废渣处理问题。首先,将中药渣制备成生物炭,然后进行单因子吸附实验,包括确认重铬酸钾溶液的初始浓度、吸附反应时间、吸附剂用量、吸附反应温度及pH值等为变量,最后进行吸附模型拟合和正交实验。研究结果表明,单因子实验最佳条件结果如下:重铬酸钾溶液的初始浓度50 mg/L,反应时间3 h,投加生物炭量0.6 g、温度为30℃,pH值为5;正交实验表明各因子主次影响为初始浓度>投加量>pH值;吸附等温线Langmuir模型拟合效果更好。This study can deal with hexavalent chromium ion pollution and solve the problem of traditional Chinese medicine waste residue treatment.Firstly,biochar was prepared from Chinese medicine residue,and then the single factor adsorption experiment was carried out with the initial concentration of Cr(VI),the reaction time,the adsorption dose,the adsorption temperature and the pH value as variables.Finally,the adsorption model fitting and orthogonal experiments were carried out.The optimal results of the single factor experiment were as follows:the concentration of Cr(VI) was 50 mg/L,the reaction time was 3 h,the amount of biochar was 0.6 g,the pH value was adjusted to 5,and the temperature was 30 ℃.

关 键 词：中药渣生物炭 吸附Cr(Ⅵ) 吸附效果 

分 类 号：TQ424[化学工程]