中国环境科学
 
 
中国环境科学  2019, Vol. 39 Issue (4): 1724-1733    DOI:
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典型PPCPs在河流沉积物中的吸附特性
余绵梓1, 袁啸1, 李适宇1,2, 胡嘉镗1,2
1. 中山大学环境科学与工程学院, 广东 广州 510275;
2. 广东省环境污染控制与修复技术重点实验室, 广东 广州 510275
Experimental and modeling study of sorption characteristics of selected PPCPs onto river sediments
YU Mian-zi1, YUAN Xiao1, LI Shi-yu1,2, HU Jia-tang1,2
1. School of Environmental Science and Engineering, Sun Yat-sun University, Guangzhou 510275, China;
2. Guangdong Province Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China

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摘要 

选取了咖啡因、氯霉素、卡马西平、磺胺甲噁唑和三氯生等5种PPCPs,在实验室条件下,近似模拟了自然河流的水/沉积物界面,应用中心复合实验设计,考察了温度、pH值、有机质含量和流速对PPCPs吸附比例的影响;利用多元回归方程拟合实验数据得到PPCPs吸附模型,并利用独立数据对模型进行验证,以建立适用于自然河流的PPCPs吸附模型.实验结果表明,咖啡因和卡马西平的吸附过程是放热反应,而磺胺甲噁唑、氯霉素和三氯生的吸附为吸热反应;pH值的升高对磺胺甲噁唑和三氯生的吸附能力产生抑制,但能促进咖啡因吸附,而对氯霉素和卡马西平的影响不大;有机质含量、流速和初始浓度对5种PPCPs的吸附比例变化趋势影响一致,随着各因素浓度或速度升高,PPCPs的吸附比例均随之增大,但影响程度有所不同.另外,吸附模型结果表明,5种PPCPs的吸附比例拟合值与实测值相关系数均达到0.8以上;独立数据验证结果表明,拟合值与实测值相关系数均达到0.8以上;因此,多元回归方程能较好地拟合环境因素与PPCPs吸附之间的关系,同时,在所考察的环境因素浓度范围内,多元回归方程较好地预测了PPCPs在自然河流沉积物中的吸附行为.

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关键词 药物和个人护理品(PPCPs)吸附沉积物影响因素多元回归方程    
Abstract

A water/sediment interface was roughly simulated in laboratory, and a central composite design was applied to investigate the influence of temperature, pH, organic content, and velocity on the sorption proprotion of five selected PPCPs (caffeine, chloramphenicol, carbamazepine, sulfamethoxazole and triclosan). Based on the experimental data, multiple regression equations were fitted and calibrated to establish favorable sorption models for PPCPs in the river systems. The results showed that the sorption process of caffeine and carbamazepine were exothermic reaction, and the sorption of sulfamethoxazole, chloramphenicol and triclosan were endothermic reaction. The increase of pH inhibited the sorption capacity of sulfamethoxazole and triclosan, but it could promote the sorption of caffeine, while it had little effect on the sorption of chloramphenicol and carbamazepine. The organic content, velocity and initial concentration had consistent effect on the sorption ratio of PPCPs. With the increase of the values of the factors, the sorption ratio of the five PPCPs increased with different degrees. The fitting and calibration results showed that the correlation coefficients between fitted and measured values of PPCPs sorption proportions were both above 0.8. Therefore, within the ranges of concentration of the investigated factors, the multiple regression equations were able to reasonably model and predict the sorption of PPCPs onto rivers sediment.

Key wordsPPCPs    sorption    sediment    parameters    multiple regression equation   
收稿日期: 2018-08-03     
PACS: X522  
基金资助:

广东省自然科学基金资助项目(2018A030313135);中央高校基本科研业务费(20133800031650007);国家重点研发计划项目(2016YFC0502803)

通讯作者: 李适宇,教授,eeslsy@mail.sysu.edu.cn;胡嘉镗,副教授,hujtang@mail.sysu.edu.cn     E-mail: eeslsy@mail.sysu.edu.cn;hujtang@mail.sysu.edu.cn
作者简介: 余绵梓(1993-),男,广东潮州人,中山大学硕士研究生,主要从事PPCPs吸附模拟研究.发表论文1篇.
引用本文:   
余绵梓, 袁啸, 李适宇, 胡嘉镗. 典型PPCPs在河流沉积物中的吸附特性[J]. 中国环境科学, 2019, 39(4): 1724-1733. YU Mian-zi, YUAN Xiao, LI Shi-yu, HU Jia-tang. Experimental and modeling study of sorption characteristics of selected PPCPs onto river sediments. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(4): 1724-1733.
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