Fe-C-H_2O_2降解十溴联苯醚的试验研究  

RESEARCH ON DEGRADATION OF BDE209 by Fe-C-H_2O_2

作　　者：董洪梅[1,2] 孙云娜[1,3] 魏东洋[1] 万大娟[2] 许振成[1] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655 [2]湖南师范大学资源与环境科学学院,湖南长沙410006 [3]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《水处理技术》2013年第8期52-56,共5页Technology of Water Treatment

基　　金：国家"水体污染控制与治理"科技重大专项(2008ZX07211-003)

摘　　要：研究了Fe-C-H2O2工艺对十溴联苯醚(BDE209)降解效果的影响,分别考察了pH、Fe与C质量比、Fe投加量、H2O2投加量及反应时间对去除率的影响,探讨了降解过程的动力学分析,并推断了可能的降解途径。结果表明,在pH为1、Fe与C质量比为1:1、Fe投加量为4.5 g、H2O2投加量为6 mL/L、反应时间为120 min的优化条件下时,BDE209的降解效果最好,降解率达80.9%;降解过程符合伪1级动力学规律,动力学方程为-ln(ρ/ρ0)=0.004 0 min-1t+1.033 7,相关系数0.947 1;BDE209脱溴过程是通过.OH攻击C-Br键逐步实现的。In this paper,the degradation of decabromodiphenyl ether（BDE209） by Fe-C-H2O2was investigated.Influence factors,such as pH,quality ratio of Fe/C,qualities of Fe and H2O2reaction time,on removal of BDE209 were studied.In addition,the kinetic analysis and possible degradation pathways were also discussed.The results indicated that the removal efficiency of BDE209 was 80.9% after two hours by optimizing the experiment conditions（pH =1,m（Fe）/m（C）=1：1,m（Fe）=4.5 g,φ（H2O2）=6 mL/L）.The degradation of BDE209 followed the pseudo-order kinetics,which could be described by the formula：-ln（ρ/ρ0）= 0.004 0 min-1t＋1.033 7,and the removal rate constant k was 0.947 1.The main process of debromination was realized by hydroxyl radical attacking carbon-bromine bond.

关 键 词：Fe-C-H2O2 十溴联苯醚（BDE209） 降解 机理 

分 类 号：X703.1[环境科学与工程—环境工程]