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首页> 外文期刊>Environmental Science & Technology >Intimate Coupling of Photocatalysis and Biodegradation for Degrading Phenol Using Different Light Types: Visible Light vs UV Light
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Intimate Coupling of Photocatalysis and Biodegradation for Degrading Phenol Using Different Light Types: Visible Light vs UV Light

机译：光催化和生物降解的紧密耦合，以使用不同的光类型来降解苯酚：可见光与紫外光

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摘要

Intimate coupling of photocatalysis and biodegradation (ICPB) technology is attractive for phenolic wastewater treatment, but has only been investigated using UV light (called UPCB). We examined the intimate coupling of visible-light-induced photocatalysis and biodegradation (VPCB) for the first time. Our catalyst was prepared doping both of Er~(3+) and YAlO_3 into TiO_2 which were supported on macroporous carriers. The macroporous carriers was used to support for the biofilms as well. 99.8% removal efficiency of phenol was achieved in the VPCB, and this was 32.6% higher than that in the UPCB. Mineralization capability of UPCB was even worse, due to less adsorbable intermediates and cell lysis induced soluble microbial products release. The lower phenol degradation in the UPCB was due to the serious detachment of the biofilms, and then the microbes responsible for phenol degradation were insufficient due to disinfection by UV irradiation. In contrast, microbial communities in the carriers were well protected under visible light irradiation and extracellular polymeric substances secretion was enhanced. Thus, we found that the photocatalytic reaction and biodegradation were intimately coupled in the VPCB, resulting in 64.0% removal of dissolved organic carbon. Therefore, we found visible light has some advantages over UV light in the ICPB technology.
机译：光催化和生物降解（ICPB）技术的紧密耦合对于酚类废水处理很有吸引力，但仅使用紫外线（称为UPCB）进行了研究。我们首次检查了可见光诱导的光催化和生物降解（VPCB）的紧密耦合。制备了将Er〜（3+）和YAlO_3都掺杂到负载在大孔载体上的TiO_2中的催化剂。大孔载体也被用于支持生物膜。 VPCB中苯酚的去除效率达到了99.8％，比UPCB中的去除率高32.6％。 UPCB的矿化能力甚至更差，这是由于较少的可吸收中间体和细胞裂解引起的可溶性微生物产物释放。 UPCB中较低的苯酚降解是由于生物膜的严重分离所致，然后由于紫外线辐射消毒，造成苯酚降解的微生物不足。相反，在可见光照射下，载体中的微生物群落得到了很好的保护，细胞外聚合物质的分泌得到增强。因此，我们发现光催化反应和生物降解在VPCB中紧密耦合，导致64.0％的溶解有机碳去除。因此，我们发现在ICPB技术中可见光比紫外线具有一些优势。

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  • 来源
    《Environmental Science & Technology》 |2015年第13期|7776-7783|共8页
  • 作者

    Dandan Zhou; Zhengxue Xu; Shanshan Dong; Mingxin Huo; Shuangshi Dong; Xiadi Tian; Bin Cui; Houfeng Xiong; Tingting Li; Dongmei Ma;

  • 作者单位

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China,School of Environment, Northeast Normal University, Changchun 130117, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    School of Environment, Northeast Normal University, Changchun 130117, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China,State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

    Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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