摘要
以莲房为生物质原料,采用水热炭化法制备了一种莲房基水热炭,考察其对喹啉废水的吸附处理性能。通过单因素实验探讨了水热炭颗粒投加量、溶液pH、接触时间以及喹啉溶液初始浓度对吸附效果的影响,并对莲房水热炭吸附喹啉过程分别进行了吸附动力学和吸附等温线分析。研究结果表明,莲房水热炭吸附喹啉过程最佳吸附条件:吸附时间120min,初始浓度140 mg/L,投加量3 g/L,pH=3。整个过程更符合准二级动力学模型,相关系数R^(2)=0.948,吸附等温线规律的更符合Langmuir等温吸附模型,R^(2)=0.986。3次脱附再生后对喹啉的去除率仍然能达到70%左右。
A lotus seedpod hydrochar was prepared by hydrothermal carbonization to investigate its adsorption of quinoline from wastewaters.The effects of the dosage of hydrochar particles,pH,contact time and initial quinoline levels on the adsorptive effect were investigated by single-factor experiments.Based on the experimental results,the adsorption kinetics and adsorption isotherms were analyzed,respectively.The results showed that the optimal adsorption conditions of quinoline by lotus seedpod hydrochar were as follows:adsorption time 120min,initial concentration 140 mg/L,dosage 3 g/L,pH=3.The whole process is more in line with the quasi-second order kinetic model,the correlation coefficient R^(2)=0.948,and the adsorption isotherm law is more in line with the Langmuir isotherm model,R^(2)=0.986.After three times of desorption and regeneration,the removal rate of quinoline can still reach about 70%.
作者
孙傲
余珍珍
吴义
谢良成
李水清
杨欢
丁康乐
SUN Ao;YU Zhen-zhen;WU Yi;XIE Liang-cheng;LI Shui-Qing;YANG Huan;DING Kang-Le(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China;Sinopec Changling Refining&Chemical Company,Yueyang 414012,China;Offshore Oil Engineering(Qingdao)Co.Ltd.,Qingdao 266520,China)
出处
《化学研究与应用》
CAS
北大核心
2023年第3期645-653,共9页
Chemical Research and Application
基金
湖北省高等学校省级教学研究项目(2021270)资助
国家自然科学基金项目(41472095)资助
油气资源与勘探技术教育部重点实验室开放基金项目(K2018-05)资助。
关键词
莲房
水热炭
喹啉
吸附动力学
吸附等温线
lotus seedpod
hydrochar
quinoline
adsorption kinetics
adsorption isotherms
