Toward concurrent organics removal and potential hydrogen production in wastewater treatment: Photoelectrochemical decolorization of methylene blue over hematite electrode in the presence of Mn(II)
Toward concurrent organics removal and potential hydrogen production in wastewater treatment: Photoelectrochemical decolorization of methylene blue over hematite electrode in the presence of Mn(II)
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DOI：
10.1016/j.apcatb.2018.11.048
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
TsingHai Wang;Chih-Ang Lin;Sue Xu;Chu‐Fang Wang;Chiu-wen Chen;C. Dong;C. Huang
中科院分区：
文献类型：
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作者：
TsingHai Wang;Chih-Ang Lin;Sue Xu;Chu‐Fang Wang;Chiu-wen Chen;C. Dong;C. Huang
利用赤铁矿电极，在Mn（II）、PEC-Mn（II）的存在下，研究了一种能够同时去除废水处理操作中有机污染物和产氢的可持续系统，作为概念验证。电化学（PEC）体系的亚甲基蓝（MB）脱色速度比光- fenton工艺快三倍，光电流密度与对照系统相当，即在没有MB的情况下，在其他相同的操作条件下，PEC水分解。此外，PEC-Mn（II）系统的优点是不需要添加h2o2，具有产氢潜力，并且在废水处理过程中易于通过形成mno2沉淀物分离Mn（II）。PEC-Mn（II）工艺是一种很有前途的可持续废水处理方法，具有并发光化学能的能力。此外，除了微生物燃料电池和厌氧消化等其他系统外，PEC-Mn（II）工艺可以成为一种新兴的废水能源替代方案。
A sustainable system capable of simultaneous removal of organic contaminants and hydrogen generation in wastewater treatment operation was studied using hematite electrode in the presence of Mn(II), PEC-Mn(II), as a proof of concept. The photoelectrochemical (PEC) system exhibited methylene blue (MB) decolorization threefold faster than that of photo-Fenton processes and yielded comparable photocurrent density to relative to the control system, i.e., PEC water splitting in the absence of MB at otherwise identical operation conditions. Furthermore, the advantages of PEC-Mn(II) system were no H2O2addition, hydrogen production potential, and ease in Mn(II) separation via the formation of MnO2precipitates during wastewater treatment operations. The PEC-Mn(II) process is a promising and sustainable approach toward wastewater treatment with the capability of concurrent photochemical energy generation. Moreover, the PEC-Mn(II) process can be an emerging energy-from-wastewater alternative in addition to other systems such as microbial fuel cell and anaerobic digestion.