东南大学学报（英文版）2025，Vol.41Issue(4)：483-492,10.DOI:10.3969/j.issn.1003-7985.2025.04.010
十六烷基三甲基溴化铵改性蒙脱土对有机磷阻燃剂的吸附行为与机理
Adsorption behavior and mechanism of organophosphate flame retardants on montmorillonite modified with hexadecyltrimethylammonium bromide
摘要
Abstract
The widespread presence of organophosphate flame retardants(OPFRs)in aquatic environments has raised significant concerns regarding environmental and hu-man health risks.In this study,the adsorption behavior of two representative aromatic OPFRs,triphenylphosphine ox-ide(TPPO)and triphenyl phosphate(TPhP),was system-atically investigated using organically modified montmoril-lonite(MMT).The effects of various environmental and operational parameters,including cationic surfactant dos-age,temperature,pH,ionic strength,and humic acid(HA)concentration,on OPFR adsorption were thoroughly examined.Results revealed that modification with hexa-decyltrimethylammonium bromide enhanced the TPPO and TPhP adsorption capacities of MMT.The adsorption pro-cess was largely independent of pH and HA concentration,and the presence of inorganic cations significantly improved the adsorption efficiency.Adsorption equilibrium was achieved within 30 min,with kinetics best described by a pseudo-second-order model.The adsorption isotherms ex-hibited a linear relationship,and the distribution coefficients for TPPO and TPhP were 0.16 and 0.51 L/g,respectively.Thermodynamic analysis indicated that the considered ad-sorption was more favorable at lower temperatures.The pri-mary adsorption mechanism was attributed to the partition-ing behavior facilitated by the organophilic nature of the modified MMT.Moreover,the adsorbent demonstrated ex-cellent regeneration performance,with its adsorption capac-ity remaining stable over five consecutive cycles.Overall,these findings show that cationic surfactant-modified MMT has a promising potential for application in wastewater treat-ment to effectively remove OPFRs from aqueous systems.关键词
蒙脱石/十六烷基三甲基溴化铵/有机磷阻燃剂/吸附/改性Key words
montmorillonite/hexadecyltrimethylammonium bromide/organophosphate flame retardants(OPFRs)/ad-sorption/modification分类
资源环境引用本文复制引用
秦庆东,张志婷,鲍寻,高霞,许妍..十六烷基三甲基溴化铵改性蒙脱土对有机磷阻燃剂的吸附行为与机理[J].东南大学学报（英文版）,2025,41(4):483-492,10.基金项目
The National Natural Science Foundation of China(No.42377020),the Innovation Project of Nanjing Water Group Co.,Ltd.(No.YF2025-009). （No.42377020）
