DBD协同负载复合金属氧化物活性炭催化降解甲基橙废水

发布时间：2018-02-09 00:11

  本文关键词： 介质阻挡放电 活性炭 复合金属氧化物 催化 染料废水 降解　出处：《高电压技术》2016年05期 　论文类型：期刊论文

【摘要】：为了提高介质阻挡放电(DBD)产生臭氧的利用效率以及DBD对甲基橙废水的降解效率,制备了负载铁锰复合金属氧化物的活性炭,并加入DBD反应器中,建立了DBD协同负载型活性炭催化处理废水体系。考察了负载型活性炭投加量、放电电压、废水p H值和反应器通气量等因素对甲基橙去除效率的影响,探讨了DBD协同负载型活性炭催化降解甲基橙废水的机理。研究结果表明:相对于单独DBD臭氧处理,加入负载型活性炭后甲基橙降解效率显著提高18%,且化学需氧量(COD)和总有机碳(TOC)的去除率分别达到43%和23%,其它放电参数、气体参数及废水参数亦影响甲基橙的降解;通过实验证明DBD协同负载型活性炭催化去除甲基橙的主要机理是其催化臭氧产生的以·OH自由基为主的强氧化性物质。研究结果证明DBD可与负载型活性炭产生协同催化效应,有效降解甲基橙染料废水,并提升废水中臭氧的利用效率。
[Abstract]:In order to improve the efficiency of ozone production by dielectric barrier discharge (DBD) and the degradation efficiency of methyl orange wastewater by DBD, activated carbon loaded with iron-manganese composite metal oxides was prepared and added into DBD reactor. The DBD synergistic activated carbon catalytic treatment system for wastewater was established. The effects of loading activated carbon dosage, discharge voltage, pH value of wastewater and aeration rate of reactor on the removal efficiency of methyl orange were investigated. The mechanism of degradation of methyl orange wastewater catalyzed by DBD co-supported activated carbon was discussed. The results showed that compared with DBD ozonation alone, the degradation mechanism of methyl orange wastewater was studied. The degradation efficiency of methyl orange was significantly increased by adding loaded activated carbon, and the removal rates of COD and TOC reached 43% and 23, respectively. Other discharge parameters, gas parameters and wastewater parameters also affected the degradation of methyl orange. The experimental results show that the main mechanism of the removal of methyl orange by DBD synergistic supported activated carbon is the strong oxidizing substance mainly 路OH free radical produced by its catalytic ozone. The results show that DBD can produce synergistic catalytic effect with the supported activated carbon. The methyl orange dye wastewater was effectively degraded and the ozone utilization efficiency was improved.
【作者单位】： 燕山大学环境与化学工程学院;大连理工大学静电与特种电源研究所;
【基金】：河北省自然科学基金(B2015203303;B2015203300) 中国博士后科学基金(2015M580216) 燕山大学青年教师自主研究计划(15LGA013;14LGB021);燕山大学博士基金(B849;B878)~~
【分类号】：X703
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本文编号：1496610