表面活性剂强化PAC-Pd/Fe纳米颗粒降解四溴双酚A的研究  

Degradation of Tetrabromobisphenol A with Surfactant-Enhanced PAC-Pd/Fe Nanoparticles

作　　者：黄国富 王淼[1] 王棉棉 宋继梅[1] 刘海舰 HUANG Guofu;WANG Miao;WANG Mianmian;SONG Jimei;LIU Haijian(School of Chemical and Environmental Engineering,Weifang University of Science and Technology//Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization//Weifang Key laboratory of Chemical Wastewater Pollution Control and Resource Reuse,Shouguang 262700,China)

机构地区：[1]潍坊科技学院化工与环境学院∥山东半岛卤水资源高值化绿色化综合利用工程技术研发中心∥潍坊市化工废水污染控制与资源化重点实验室,寿光262700

出　　处：《华南师范大学学报（自然科学版）》2020年第2期53-59,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：山东省重大科技创新工程项目(2019JZZY020704);潍坊市科学技术发展计划项目(2019GX072);潍坊科技学院校级课题(2018KJBS01,2018KJYB10)。

摘　　要：Pd/Fe纳米材料对卤代有机污染物有较强的降解能力,但四溴双酚A的强疏水性会阻碍污染物与Pd/Fe的有效接触.为促进四溴双酚A的降解,考察了不同表面活性剂对PAC-Pd/Fe纳米颗粒降解四溴双酚A的影响,结果表明:少量阴离子表面活性剂SDS对四溴双酚A的降解有明显的促进作用,反应速率可提高1.7~2.5倍;非离子表面活性剂TX-100对四溴双酚A降解的促进效果不明显,当其质量浓度超过临界胶束浓度时,甚至表现出抑制作用;阳离子表面活性剂CTAB对四溴双酚A的降解起抑制作用,且质量浓度越大,其抑制效果越明显;PAC-Pd/Fe纳米颗粒对四溴双酚A的降解是连续脱溴反应,四溴双酚A和其中间产物三溴双酚A、二溴双酚A和一溴双酚A的表观降解速率常数分别为0.4662、0.4356、0.3380和0.2711 min^-1,与苯环上溴原子的数目成正比.Pd/Fe nanoparticles are considered effective agents for the degradation of halogenated organic compounds(HOCs).However,the high hydrophobicity of tetrabromobisphenol A(TBBPA)hinders its degradation owing to the inefficient contacts of TBBPA and Pd/Fe nanoparticles.To promote the degradation of TBBPA,the effects of different surfactants on TBBPA degradation with PAC-Pd/Fe nanoparticles were investigated.The results show that the anionic surfactant SDS had the best promoting effect on TBBPA degradation and the rate of reaction increased by 1.7-2.5 times.The nonionic surfactant TX-100 had little enhancement in TBBPA degradation.It even exerted an inhibitive effect as its concentration went above the critical micelle concentration.The cationic surfactant CTAB displayed the most inhibitive effect on TBBPA degradation,and the inhibition was stronger as the surfactant concentration increased.The degradation of TBBPA with PAC-Pd/Fe nanoparticles was a consecutive debromination reaction.The corresponding degradation rate constants of parent TBBPA and its intermediates tri-BBPA,diBBPA and mono-BBPA were 0.4662,0.4356,0.3380 and 0.2711 min^-1,respectively,which were proportional to the amount of bromide atoms on benzene rings.

关 键 词：表面活性剂 PAC-Pd/Fe纳米颗粒 四溴双酚A 降解 动力学 

分 类 号：X52[环境科学与工程—环境工程]