上海海洋大学学报2024，Vol.33Issue(6)：1369-1379,11.DOI:10.12024/jsou.20230804293
生物炭对养殖水体中复合污染物的去除效果与吸附机理初探
Preliminary study on the removal effect and adsorption mechanism of biochar on combined pollutants in aquaculture water
摘要
Abstract
The combined pollution of heavy metals and organic matter in aquaculture water bodies threatens the quality of aquatic products and human health.In this study,aquatic plants from aquaculture ponds were used as raw materials to prepare biochar for adsorption and removal of heavy metal cadmium(Cd2+),polycyclic aromatic hydrocarbons(PAHs)and enrofloxacin(EFX)in aquaculture wastewater.The adsorption effect was assessed by pollutant removal and risk(RQ)reduction,while the elemental composition,specific surface area,apparent morphology,physical phase structure and functional group composition were characterized by scanning electron microscopy(SEM-EDS),X-ray diffractometry(XRD),and Fourier Transform Infrared Spectrometry(FTIR),respectively,and the preliminary adsorption mechanism was carried out in conjunction with adsorption kinetics and isotherm studies.The results showed that the specific surface area of BC500 was large,and C=C,C=O,-COO and-OH were the main functional groups of BC500.The average removal of Cd2+,FLU,PHE,FLT,PYR and EFX by BC500 ranged from 54%to 90%,and the RQ value of ecological risk was also reduced from 0.85 to 0.33,indicating the excellent removal performance of BC500 biochar.The results of adsorption kinetics and isothermal model simulation showed that the adsorption of BC500 biochar on the composite pollutants was dominated by the adsorption of chemical monomolecular layer,and there was a competitive adsorption between heavy metal Cd2+and organic pollutants(PAHs and EFX).In addition,the adsorption mechanisms of BC500 biochar on composite pollutants included oxygenated functional group complexation(Cd2+,PAHs,and EFX),π-π interactions(Cd2+,PAHs,and EFX),ion exchange(Cd2+and EFX),hydrogen bonding(PAHs and EFX),and Cd2+-EFX complexation.关键词
生物炭/复合污染/吸附机理/养殖尾水Key words
biochar/combined pollutants/adsorption mechanism/aquaculture wastewater分类
资源环境引用本文复制引用
郑跃平,徐嘉楠,范厚勇,尹杰,李娟英..生物炭对养殖水体中复合污染物的去除效果与吸附机理初探[J].上海海洋大学学报,2024,33(6):1369-1379,11.基金项目
中华鲟养殖基地的水质监测与评价项目(D-8006-22-0074) （D-8006-22-0074）
长三角核心区池塘养殖污染物源头控制与尾水治理技术攻关及示范项目(21002410500) （21002410500）
