铁刨花-Fenton-絮凝工艺对染料生产废水中AOX、色度和TOC的去除效果研究  

Removal of AOX,Chroma and TOC in Chemical Dyestuff Wastewater with Iron Scraps-Fenton-Coagulation Combined Process

作　　者：舒小铭 徐灿灿 文晓刚[5] 朱静娜[3] 赵远[4] 刘锐 陈吕军[1,2] 

机构地区：[1]浙江清华长三角研究院生态环境研究所,浙江省水质科学与技术重点实验室,嘉兴314006 [2]清华大学环境学院,北京100084 [3]嘉兴市环境保护监测站,嘉兴314000 [4]常州大学环境与安全工程学院,常州213164 [5]嘉兴学院南湖学院,嘉兴314001

出　　处：《环境科学》2016年第7期2618-2624,共7页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2013AA06A305);浙江省科技计划项目(2013C31107);江苏省重点研发专项资金(社会发展)项目(BE2015670);嘉兴市科技计划项目(2014AY21018)

摘　　要：采用铁刨花-Fenton-絮凝工艺处理染料生产废水,考察了不同Fe^(2+)与H_2O_2摩尔比(1∶3~1∶15)、铁刨花反应时间(2~5h)、Fenton氧化反应时间(20~80 min)下可吸附性有机卤代物(AOX)、色度和总有机碳(TOC)的去除效果.结果表明,AOX、色度和TOC去除率随Fe^(2+)与H_2O_2摩尔比的降低先升高后减少,随铁刨花和Fenton反应时间的增加而持续升高.最优化条件为Fe^(2+)与H_2O_2摩尔比1∶8、铁刨花反应时间4 h和Fenton反应时间60 min,该条件下AOX、色度和TOC的去除率分别为94.2%、93.7%和27.2%.比较实验结果表明,铁刨花-Fenton-絮凝组合工艺对废水AOX、色度和TOC的去除效果远优于铁刨花处理、Fenton氧化、絮凝沉淀的单个技术或两两技术组合效果.GC-MS分析表明,废水中的有机卤代物和苯胺类污染物得到高效去除,此外硝基苯类、苯酚类、苯甲醛类、醚类、腈类和杂环化合物等有毒有害物质也均得到高效去除.叔丁醇捕获·OH实验表明·OH在Fenton反应中的主导作用.Iron scraps-Fenton-coagulation process was applied to chemical dyestuff wastewater. The removal performance of absorbable organic halogens（ AOX）,chroma and total organic carbon（ TOC） was investigated at different molar ratios of Fe^（2＋） to H_2O_2（ 1∶ 3-1∶15）,iron scraps reaction time（ 2-5 h） and Fenton reaction time（ 20-80 min）. The results showed that the removal ratios of AOX,chroma and TOC firstly increased and then decreased with the decrease of the molar ratio of Fe^（2＋） to H_2O_2,while continuously increased with the increase of iron scraps and Fenton reaction time. The optimal condition was determined as Fe^（2＋）∶ H_2O_2 ratio of 1∶ 8,iron scraps reaction time of 4 h and Fenton reaction time of 60 min,under which 94. 2% of AOX,93. 7% of chroma and 27. 2% of TOC were removed. A comparison study revealed that the iron scraps-Fenton-coagulation combined process could achieve much better removal of AOX,chroma and TOC than any other single or combined processes of iron treatment,Fenton oxidation and coagulation. GC-MS analysis revealed that halogenated compounds and anilines were efficiently removed,as well as nitrobenzenes,phenols,benzaldehydes,ethers,nitriles and heterocyclic compounds. ·OH was found to devote much in the Fenton reaction according to the tert-butyl alcohol trapping hydroxyl radicals test.

关 键 词：铁刨花-Fenton-絮凝工艺 染料生产废水 可吸附性有机卤代物 色度 苯胺类物质 

分 类 号：X703.1[环境科学与工程—环境工程]