摘要
为了阐明黑碳(BC)可溶性组分的浸出对BC的结构特性及对BC吸附行为的影响,该文围绕不同孔道结构的BC对有机污染物吸附行为的影响展开一系列研究。首先,通过热解法制备了原始BC。其次,利用碱洗和水洗方法去除BC中的可溶性BC组分,得到水洗黑碳(BC-W)和碱洗黑碳(BC-B),并对上述制备的3种BC样品进行了元素分析、比表面积和孔径分布、透射电镜等表征。选择对乙酰氨基酚、环丙沙星、邻苯二甲酸二甲酯和邻苯二甲酸二乙酯作为环境中典型有机污染物代表,通过吸附平衡实验和吸附动力学实验,结合上述微观表征结果,得到以下结论:去除可溶性BC后,总体积与微孔体积显著增加;有机污染物在BC上的吸附增强程度与有机污染物的分子尺寸呈正相关;BC的微孔体积增加,提高了有机污染物分子在BC上的吸附速率。
In order to clarify the effect of the leaching of soluble components of black carbon(BC)on the structural characteristics of BC and the adsorption behavior of BC,a series of studies are carried out around the effects of BC with different pore structures on the adsorption behavior of organic pollutants.Firstly,the original BC is prepared by pyrolysis.Secondly,the soluble BC components in BC are removed by water washing and alkali washing methods to obtain black carbon-water(BC-W)and black carbon-base(BC-B).The three BC samples are characterized by elemental analysis,specific surface area and pore size distribution,transmission electron microscope and so on.Acetaminophen,ciprofloxacin,dimethyl phthalate and diethyl phthalate are selected as typical organic pollutants in the environment.Through adsorption equilibrium experiments and adsorption kinetics experiments,combined with the above micro characterization results,the following conclusions are obtained:after removing soluble BC,the total volume and micropore volume increase significantly;the degree of enhanced adsorption of organic pollutants on BC is positively correlated with the molecular size of organic pollutants;the increase of micropore volume of BC promotes the adsorption rate of organic pollutant molecules on BC.
作者
王冰玉
郭文珍
王筠皓
谢慧芳
Wang Bingyu;Guo Wenzhen;Wang Yunhao;Xie Huifang(School of Environmental and Biological Engineering;Jiangsu Key Laboratory of Chemical PollutionControl and Resources Reuse,Nanjing University of Science and Technology,Nanjing 210094,China;State Key Laboratory of Pollution Control and Resource Reuse,Nanjing University,Nanjing 210023,China)
出处
《南京理工大学学报》
CAS
CSCD
北大核心
2021年第6期728-737,共10页
Journal of Nanjing University of Science and Technology
基金
中央高校基本科研业务费专项资金(3092002118)
中国博士后科学基金(2020M68618)
污染控制与资源化研究国家重点实验室开放基金(PCRRF19022)。
关键词
黑碳
可溶性组分
吸附行为
有机污染物
水洗黑碳
碱洗黑碳
吸附平衡实验
吸附动力学实验
black carbon
soluble components
adsorption behavior
organic pollutants
black carbon-water
black carbon-base
adsorption equilibrium experiments
adsorption kinetics experiments
