摘要
用Fenton氧化处理合成制药企业活性污泥混合液,考察了不同Fe^(2+)、H_2O_2投加量和不同反应时间下污泥与上清液中AOX(可吸附有机卤代物)的去除效果,优化了反应条件,探讨了氧化机制.结果表明,Fenton氧化的最佳条件为H_2O_2投加量0.90 mol·L^(-1),Fe^(2+)投加量0.045 mol·L^(-1)[物质的量比为:n(Fe^(2+))∶n(H_2O_2)=1∶20],反应2 h,污泥和上清液中AOX可分别去除70.7%和78.5%.GC-MS分析结果显示,污泥中含有11种有机卤代物,Fenton氧化后有8种不再检出;3种仍有检出,但浓度有所降低,去除率约为40%~50%.与此同时,污泥中对二甲苯、邻苯二甲酸二异丁酯等非有机卤代物类有毒有害有机物也得到有效去除.
This study aimed to remove AOX（ adsorbable organic halogens） with Fenton oxidation from activated sludge in a chemical pharmaceutical industry. The influences of H_2O_2 dosage,Fe^（2＋）dosage and reaction time were investigated,based on which the reaction conditions for AOX removal were optimized,and the reaction mechanism was discussed. The optimized reaction conditions were as follows： 0. 90 mol·L^（-1） of H_2O_2,0. 045 mol·L^（-1） of Fe^（2＋）[n（ Fe^（2＋）） ∶ n（ H_2O_2） of 1∶ 20] and reaction time of 2 h. Under the optimized conditions,70. 7% of AOX in the sludge and 78. 5% of AOX in the supernatant were removed. GC-MS analysis revealed that eleven organic halides were detectable in the original sludge. After Fenton reaction,only three organic halides were detectable,and their peak areas were reduced by 40%-50%. Toxic and hazardous non-AOX organic matters such as xylene,diisobutyl phthalate were also effectively removed.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2016年第7期2625-2631,共7页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2013AA06A305)
浙江省环保科研计划项目(2013B006)
南湖区科技计划项目(2015QS01)
浙江省科技计划项目(2013C31107)
关键词
AOX
FENTON
活性污泥
制药业
有机污染物
adsorbable organic halogens（AOX）
Fenton
activated sludge
pharmaceutical industry
organic pollutants
