张凰2,,,
王朋1,
文方园1,
张迪1
1. 昆明理工大学 环境科学与工程学院, 昆明 650500;
2. 昆明理工大学 云南省食品安全研究院, 昆明 650500
作者简介: 陈建(1994-),男,本科生,研究方向为碳基材料对有机物的吸附,E-mail:chenjiankmust@qq.com.
通讯作者: 张凰,zhanghuang2002113@163.com ;
基金项目: 国家自然科学基金(41303093)；云南省自然科学基金(2014FB121)；昆明理工大学人才启动经费(14118762)；云南省大学生创新创业训练计划项目基金(201610674035)中图分类号: X171.5
Adsorption Kinetics of Carbamazepine on Biochars at Different Initial Concentrations
Chen Jian1,Zhang Huang2,,,
Wang Peng1,
Wen Fangyuan1,
Zhang Di1
1. Faculty of Environmental Science and Engineering, Kunming University of Science&Technology, Kunming 650500, China;
2. Yunnan Institute of Food Safety, Kunming University of Science&Technology, Kunming 650500, China
Corresponding author: Zhang Huang,zhanghuang2002113@163.com ;
CLC number: X171.5
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摘要:为了解人工合成药物在生物炭上的吸附动力学特征及其浓度效应的影响,选择卡马西平(CBZ)为目标污染物。探讨不同初始质量浓度(2、4、25、50 mg·L-1)在不同裂解温度(200、300、500℃)下制备的生物炭上的吸附动力学特征。结果表明,双室一级动力学模型可以精确地描述CBZ在生物炭上的吸附动力学特征。CBZ的快室吸附对总体吸附的贡献随初始浓度的增大而减小,而慢室吸附贡献则增大。л-л作用可能对CBZ的吸附贡献较大。孔隙填充可以描述慢室吸附过程,可能是吸附速率的控制环节。
关键词: 卡马西平/
生物炭/
双室一级动力学模型/
孔隙填充/
浓度效应
Abstract:Sorption kinetics of synthetic drugs on biochars and the effect of drug concentration were investigated. Carbamazepine (CBZ) was used as the target pollutant. The sorption kinetics of CBZ at different initial concentrations (2, 4, 25, 50 mg·L-1) on biochars produced at different temperatures (200, 300, 500 ℃) were studied. The results showed that the two-compartment first order model could well fit the sorption kinetics of CBZ. The contribution of fast sorption decreased but the contribution of slow sorption increased to the total sorption with increasing CBZ initial concentrations. The л-л EDA interaction might be an important mechanism for CBZ sorption. The slow sorption was controlled by pore-filling mechanism which was likely to be the rate-limiting step of CBZ sorption kinetics.
Key words:carbamazepine/
biochar/
two-compartment first order model/
pore-filling/
concentration effect.
