生物炭的制备温度及酸处理对卡马西平的吸附动力学影响  

Impact of pyrolytic temperature and acid wash on adsorption kinetics of carbamazepine on biochar

作　　者：陈建[1] 王朋[1] 曹艳贝 郭秉林 张迪[1] 

机构地区：[1]昆明理工大学,环境科学与工程学院,昆明650500

出　　处：《环境化学》2016年第7期1461-1467,共7页Environmental Chemistry

基　　金：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);昆明理工大学课外学术科技创新基金(2015BA082)资助~~

摘　　要：本研究考察了卡马西平(CBZ)在9种不同条件(裂解温度200、300、500℃,无酸,HCI和HCI-HF)处理的生物炭上的吸附动力学,分别应用拟一级、拟二级和双室一级3种动力学模型对实验数据进行拟合.研究结果表明,双室一级动力学模型对吸附动力学提供了更精确的描述.裂解温度和酸处理对CBZ的吸附动力学有显著影响,具体表现为不同酸洗导致矿物含量发生显著变化,矿物对生物炭吸附CBZ的快室吸附单元起主要作用,生物炭内部的芳香环随生物炭的升高而更加致密,生物炭内部的芳香环结构主要贡献于慢室吸附单元.生物炭的矿物组分一方面屏蔽了有机质上的一些吸附点位,另一方面矿物自身可以有效地吸附污染物,酸洗去矿物对生物炭吸附污染物的表观影响可能取决于两个方面的平衡.The adsorption kinetics of carbamazepine（ CBZ） on 9 biochars produced at different charred temperature（ 200,300 and 500 ℃） and deashed with different acids（ HCI and HCI-HF）were investigated in this study. The pseudo-first-order model,pseudo-second-order model and twocompartment first order model were applied to fit the adsorption kinetic data. The results showed that the two-compartment first order model fitted the adsorption kinetic data better than other two models.The pyrolytic temperature and acid treatment had significant impact on adsorption kinetics of CBZ.Specifically,the mineral content altered significantly after deashing treatment with different acids,and was responsible for the rapid adsorption of CBZ on biochars. The aromatic ring structure of biochars become more condensed with increasing pyrolytic temperature and mainly contributed to the slow adsorption. On the one hand,the mineral of biochars likely blocked some adsorption sites of organic matter. On the other hand,the mineral could effectively adsorb organic contaminants. Thus,the effects of mineral on the apparent adsorption of contaminants on biochars were likely controlled by the balance of the two aspects.

关 键 词：卡马西平 生物炭 裂解温度 矿物 双室一级模型 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]