纳米铁类芬顿催化氧化焦化废水生化出水研究
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摘要
以焦化废水生化出水为研究对象,通过纳米铁类Fenton氧化反应对焦化废水进行深度处理,考察了温度、pH、纳米铁用量对有机物去除的影响。结果表明,在温度30℃、pH为3.3、纳米铁用量为1 g/L的优化条件下,随着时间进行有机物去除率快速增加,10 min内可达41.6%,60 min后逐渐达到最高70.7%。GC-MS分析表明类Fenton氧化能够降解大部分有机物,其中对含氮、氧的杂环化合物去除率最高80.9%,对烷烃类物质去除率最低43.0%。扫描电子显微镜、X射线衍射仪分析表明,反应后纳米铁中零价铁特征峰强度略有降低,但纳米铁形貌和化学成分变化不明显,类Fenton反应是有机物去除的主要机制。
Advanced treatment of biochemical effluent by nano-ironas Fenton-like oxidation reaction was studied, and biochemical effluent of coking wastewater as the object. The effects of temperature, pH, nano-iron dosage on organic matter removal were investigated. The results showed that the removal efficiency of organic matter increased rapidly, reached 41.6% at 10 min, and reached the highest of 70.7% after 60 min, when temperature, pH,nano-iron dosage was 30 ℃, 3.3 and 1 g/L respectively. By GC-MS analysis, most of the organic matter in the biochemical effluent was degraded in Fenton-like oxidation process. The removal rate of the heterocyclic compound containing N and O reached 80.9%, and the removal rate of alkane compound reached 43.0%. SEM and XRD showed that the intensity peak of zero-valent iron was slightly reduced after the reaction, but the morphology and chemical composition of iron nanoparticles were not changed obviously. The Fenton-like reaction is the main mechanism of organic removal.
Advanced treatment of biochemical effluent by nano-ironas Fenton-like oxidation reaction was studied, and biochemical effluent of coking wastewater as the object. The effects of temperature, pH, nano-iron dosage on organic matter removal were investigated. The results showed that the removal efficiency of organic matter increased rapidly, reached 41.6% at 10 min, and reached the highest of 70.7% after 60 min, when temperature, pH,nano-iron dosage was 30 ℃, 3.3 and 1 g/L respectively. By GC-MS analysis, most of the organic matter in the biochemical effluent was degraded in Fenton-like oxidation process. The removal rate of the heterocyclic compound containing N and O reached 80.9%, and the removal rate of alkane compound reached 43.0%. SEM and XRD showed that the intensity peak of zero-valent iron was slightly reduced after the reaction, but the morphology and chemical composition of iron nanoparticles were not changed obviously. The Fenton-like reaction is the main mechanism of organic removal.
引文
[1]张旋,王启山.高级氧化技术在废水处理中的应用[J].水处理技术,2009,35(3):24-28.
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[5]黄超,余兵,李任,等.超有机膨润土负载纳米零价铁还原-类芬顿氧化降解2,4-二氯苯酚[J].环境工程学报,2015,9(8):3643-3649.
[6] SHI L N, ZHANG X, CHEN Z L. Removal of Chromium(VI)from wastewater using bentonite-supported nanoscale zero-valent iron[J].Water Research,2011,45(2):886-892.
[7] ZHA S, CHENG Y, GAO Y, et al. Nanoscale zero-valent iron as a catalyst for heterogeneous Fenton oxidation of amoxicillin[J].Chemical Engineering Journal,2014,255:141-148.
[8]赖鹏,赵华章. Fenton氧化深度处理焦化废水的研究[J].当代化工,2012,41(1):11-14.
[9] NEYENS E, BAEYENS J. A review of classic Fenton's peroxidation as an advanced oxidation technique[J].Journal of Hazardous Materials,2003,98(1):33-50.
[10] TANG W Z, HUANG C P. Stochiometry of Fenton's reagent in the oxidation of chlorinated aliphatic organic pollutants[J]. Environmental Technology Letters,1997,18(1):11.
[11]李任超,查双兴,金晓英,等.纳米铁系金属制剂用于类Fenton氧化降解2,4-二氯苯酚[J].福建师范大学学报(自然科学版),2013,29(4):57-64.
[12] WU Y, ZENG S, WANG F, et al. Heterogeneous Fenton-like oxidation of malachite green by iron-based nanoparticles synthesized by tea extract as a catalyst[J].Separation&Purification Technology,2015,154:161-167.
[13]吴丽雅,宋秀兰,林金华.Fenton试剂法深度处理焦化废水的研究及产物分析[J].科学技术与工程,2015,15(9):271-274.
[14] SANTOS A, YUSTOS P, RODRIGUEZ S, et al. Wet oxidation of phenol, cresols and nitrophenols catalyzed by activated carbon in acid and basic media[J].Applied Catalysis B:Environmental,2006,65(3/4):269-281.
[15] WANG L, YANG J, LI Y, et al. Removal of chlorpheniramine in a nanoscale zero-valent iron induced heterogeneous Fenton system:Influencing factors and degradation intermediates[J].Chemical
[2] GOGATE P R, PANDIT A B A. Review of imperative technologies for wastewater treatment:oxidation technologies at ambient conditions[J].Advances in Environmental Research,2004,8(y4):50l-551.
[3]黎华恒,张平,严丹燕.芬顿(Fenton)高级氧化技术在废水处理上的研究进展[J].能源与环境,2012(3):73-74.
[4]张潇逸,何青春,蒋进元,等.类芬顿处理技术研究进展综述[J].环境科学与管理,2015(6):58-61.
[5]黄超,余兵,李任,等.超有机膨润土负载纳米零价铁还原-类芬顿氧化降解2,4-二氯苯酚[J].环境工程学报,2015,9(8):3643-3649.
[6] SHI L N, ZHANG X, CHEN Z L. Removal of Chromium(VI)from wastewater using bentonite-supported nanoscale zero-valent iron[J].Water Research,2011,45(2):886-892.
[7] ZHA S, CHENG Y, GAO Y, et al. Nanoscale zero-valent iron as a catalyst for heterogeneous Fenton oxidation of amoxicillin[J].Chemical Engineering Journal,2014,255:141-148.
[8]赖鹏,赵华章. Fenton氧化深度处理焦化废水的研究[J].当代化工,2012,41(1):11-14.
[9] NEYENS E, BAEYENS J. A review of classic Fenton's peroxidation as an advanced oxidation technique[J].Journal of Hazardous Materials,2003,98(1):33-50.
[10] TANG W Z, HUANG C P. Stochiometry of Fenton's reagent in the oxidation of chlorinated aliphatic organic pollutants[J]. Environmental Technology Letters,1997,18(1):11.
[11]李任超,查双兴,金晓英,等.纳米铁系金属制剂用于类Fenton氧化降解2,4-二氯苯酚[J].福建师范大学学报(自然科学版),2013,29(4):57-64.
[12] WU Y, ZENG S, WANG F, et al. Heterogeneous Fenton-like oxidation of malachite green by iron-based nanoparticles synthesized by tea extract as a catalyst[J].Separation&Purification Technology,2015,154:161-167.
[13]吴丽雅,宋秀兰,林金华.Fenton试剂法深度处理焦化废水的研究及产物分析[J].科学技术与工程,2015,15(9):271-274.
[14] SANTOS A, YUSTOS P, RODRIGUEZ S, et al. Wet oxidation of phenol, cresols and nitrophenols catalyzed by activated carbon in acid and basic media[J].Applied Catalysis B:Environmental,2006,65(3/4):269-281.
[15] WANG L, YANG J, LI Y, et al. Removal of chlorpheniramine in a nanoscale zero-valent iron induced heterogeneous Fenton system:Influencing factors and degradation intermediates[J].Chemical
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