花生壳生物炭的制备及其对水中罗丹明B的吸附性能研究
Preparation of peanut shell biochar and its adsorption performance on Rhodamine B in water
陆星蓉 1蒋星宇 1胡欣 1邱钰桁 1卜路霞 1宋振兴2
作者信息
- 1. 天津农学院 基础科学学院,天津 300392
- 2. 天津朗缪新材料科技有限公司,天津 300384
- 折叠
摘要
以花生壳为原料,KOH为改性剂,通过限氧热解法在 200℃下制备花生壳生物炭用于吸附水中的罗丹明B.采用单因素试验,考察了罗丹明B初始浓度、溶液pH、吸附时间、生物炭投加量等对罗丹明B吸附效果的影响,并对吸附机制进行了分析.研究表明,在活性炭投加量为20 mg,罗丹明B溶液体积 25.00 mL、初始质量浓度 1.00 mg/L,转速 150 r/min的条件下吸附 75 min,此时去除率达 97.90%.参数拟合结果表明,准二级动力学方程(R2=0.9982)能够更好地描述改性花生壳生物炭对罗丹明B的吸附过程,吸附等温线更遵循Langmuir等温吸附模型,属于单分子层化学吸附.
Abstract
Using peanut shell as raw material and KOH as modifier,peanut shell biochar was prepared for adsorption of Rhodamine B in water by oxygen-limited pyrolysis at 200℃.The effects of initial concentration of Rhodamine B,pH of solution,adsorption time and dosage of biochar on the adsorption of Rhodamine B were investigated by single factor experiment,and the adsorption mechanism was also analyzed.The results showed that at the dosage of 20 mg,the volume of 25.00 mL,the initial concentration of 1.00 mg/L,the rotate speed of 150 r/min and the adsorption time of 75 min,the removal rate reached 97.90%.The results of parameter fitting showed that the adsorption process of Rhodamine B by modified peanut shell biochar followed the quasi-second-order kinetic equation(R2=0.9982),and the adsorption isotherm followed the Langmuir isotherm adsorption model,which belonged to single molecular layer chemisorption.
关键词
花生壳/生物炭/罗丹明B/吸附/KOHKey words
peanut shell/biochar/Rhodamine B/adsorption/KOH引用本文复制引用
基金项目
天津市大学生创新创业训练计划项目(202210061050)
天津市大学生创新创业训练计划项目(202310061119)
枣庄市自主创新及成果转化计划(2022GH20)
天津市教委科研计划项目(2021KJ113)
天津市科技计划项目(20YDTPJC01080)
出版年
2024
NETL
NSTL
万方数据