Enhanced photoelectrocatalytic degradation of bisphenol A and simultaneous production of hydrogen peroxide in saline wastewater treatment.
Enhanced photoelectrocatalytic degradation of bisphenol A and simultaneous production of hydrogen peroxide in saline wastewater treatment.
复制标题
在含盐废水处理中增强光电催化降解双酚 A 并同时产生过氧化氢。
DOI：
10.1016/j.chemosphere.2019.01.109
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发表时间：
2019-05
期刊：
影响因子：
8.8
通讯作者：
Li Juying
中科院分区：
文献类型：
--
作者：
Xiao Ke;Liang Huiyu;Chen Siyuan;Yang Bo;Zhang Junmin;Li Juying
含盐废水中有机污染物的降解一直是环境修复的挑战。在这项研究中，双室电池的结构可以同时降解含盐废水中的有机污染物（双酚 A、BPA）并产生过氧化氢 (H2O2)。在阳极室中，设计了一种新的太阳光驱动系统，使用氯离子（Cl‾）作为介质，WO3光阳极作为自由基引发剂。在太阳光照射下，WO3光阳极产生的光生空穴促进Cl‾转化为活性氯物种，从而可以更快地氧化BPA。结果表明，通过将pH值提高到10.8或将Cl‾浓度提高到200mM，可以显着提高BPA的去除率。在此条件下，92%的BPA在120分钟内被降解为CO2和H2O。在阴极室中，采用新型多巴胺改性碳毡（CF-DPA）阴极来产生H2O2，在最佳条件下获得了5.4mM的高浓度。 CF-DPA 的电化学分析表明，多巴胺修饰促进了电子转移并增强了双电子氧还原，从而增加了 H2O2 产率。
The degradation of organic pollutants in saline wastewater has been a challenge for environmental remediation. In this study, a two-chamber cell was structured to simultaneously degrade organic contaminants (bisphenol A, BPA) from saline wastewater and produce hydrogen peroxide (H2O2). In the anode chamber, a new solar-light-driven system was devised using chloride ions (Cl‾) as a medium and WO3photoanode as a radical initiator. Under solar light irradiation, photogenerated holes yielded at the WO3photoanode promoted the conversion of Cl‾ to reactive chlorine species, which could oxidize BPA more rapidly. The results indicated that the BPA removal can be significantly enhanced by increasing pH to 10.8 or increasing the Cl‾ concentration to 200 mM. At these conditions, 92% BPA was degraded into CO2and H2O in 120 min. In the cathode chamber, a new dopamine modified carbon felt (CF-DPA) cathode was employed to produce H2O2, obtaining a high concentration of 5.4 mM under optimum conditions. The electrochemical analyses for CF-DPA revealed that dopamine modification promoted electron transfer and enhanced the two-electron oxygen reduction to increase H2O2yields.
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