详细信息
改性海绵铁降解四溴双酚A的特性及机理
Performance and mechanism of tetrabromobisphenol A degradation by modified sponge iron
文献类型:期刊文献
中文题名:改性海绵铁降解四溴双酚A的特性及机理
英文题名:Performance and mechanism of tetrabromobisphenol A degradation by modified sponge iron
作者:黄蒸[1,2];邓东阳[3];李辉[1];李良忠[3];向明灯[3];于云江[1,3];刘勇弟[1];鞠勇明[3]
机构:[1]华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室,上海200237;[2]湖南华菱湘潭钢铁有限公司,湘潭411101;[3]环境保护部华南环境科学研究所,广州510655
年份:2017
卷号:36
期号:5
起止页码:1083
中文期刊名:环境化学
外文期刊名:Environmental Chemistry
收录:CSTPCD;;北大核心:【北大核心2014】;CSCD:【CSCD2017_2018】;
基金:国家自然科学基金(U1401233,21377045,21607048)资助
语种:中文
中文关键词:海绵铁;钯海绵铁双金属;四溴双酚A;降解机理
外文关键词:sponge iron;palladium-loaded sponge iron;tetrabromobisphenol A(TBBPA);degradation mechanism
摘要:在超声条件下通过置换反应制备钯海绵铁(Pd0-s-Fe0)双金属颗粒,采用扫描电子显微镜(SEM)和电子能谱仪(EDS)进行表征.Pd0-s-Fe0催化还原降解溶液中的四溴双酚A(TBBPA)的实验结果表明,Pd0-s-Fe0较s-Fe0(海绵铁)催化活性高,在p H值为6.7,100 m L初始浓度为15 mg·L^(-1)溶液投加5 g负载0.07%钯的改性海绵铁的条件下,反应120 min后TBBPA的去除率达到91.5%,且Pd0-s-Fe0降解TBBPA符合一级动力学规律.经高效液相色谱串联四极杆飞行时间质谱(LC-TOF-MS)分析鉴定降解产物,明确TBBPA的还原降解途径为TBBPA被脱去1—4个溴生成三溴双酚A、二溴双酚A、一溴双酚A、双酚A.
Pd0-s-Fe0 bimetallic particles were synthesized by liquid phase reductive displacement method under ultrasound and characterized by scanning electron microscopy(SEM) and energy dispersive spectrometry(EDS).The results of the tetrabromobisphenol A degradation(TBBPA) by Pd0-s-Fe0 indicated that Pd0-s-Fe0 showed better catalytic activity compared with s-Fe0.At p H 6.7,with 5 g Pd0-s-Fe0 particles in 100 m L 15 mg·L-1TBBPA solution,the degradation efficiency of TBBPA reached 91.5%,and the reaction obeyed the pseudo first-order kinetics.Through identification of the major degradation intermediates by liquid chromatography time-of-flight mass spectrometry(LC/TOF/MS),the degradation pathway of TBBPA was through debromination of 1—4 Br atoms to produce tri-BBPA,di-BBPA,mono-BBPA and BPA.
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