Treatment of diluted palm oil mill effluent (POME) synchronous with electricity production in a persulfate oxidant-promoted photocatalytic fuel cell.

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Chun-Ting Joyee Yap, Sze-Mun Lam, Jin-Chung Sin, Honghu Zeng, Haixiang Li, Liangliang Huang, Hua Lin
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引用次数: 0

Abstract

Attributable to the prosperous production growth of palm oil in Malaysia, the generated palm oil mill effluent (POME) poses a high threat owing to its highly polluted characteristic. Urged by the escalating concern of environmental conservation, POME pollution abatement and potential energy recovery from the effluent are flagged up as a research topic of interest. In this study, a cutting-edge photocatalytic fuel cell (PFC) system with employment of ZnO/Zn nanorod array (NRA) photoanode, CuO/Cu cathode, and persulfate (PS) oxidant was successfully designed to improve the treatment of POME and simultaneous energy production. The photoelectrodes were fabricated and characterized by field emission scanning electron microscopy with energy (FESEM), X-ray diffraction (XRD), energy-dispersive X-ray (EDX), and Brunauer, Emmett, and Teller analysis (BET). Owing to the properties of strong oxidant of PS, the proposed PFC/PS system has exhibited exceptional performance, attaining chemical oxygen demand (COD) removal efficiency of 96.2%, open circuit voltage (Voc) of 740.0 mV, short circuit current density (Jsc) of 146.7 μA cm-2, and power density (Pmax) of 35.6 μW cm-2. The pre-eminent PFC/PS system performance was yielded under optimal conditions of 2.5 mM of persulfate oxidant, POME dilution factor of 1:20, and natural solution pH of 8.51. Subsequently, the postulated photoelectrocatalytic POME treatment mechanism was elucidated by the radical scavenging study and Mott-Schottky (M-S) analysis. The following recycling test affirmed the stability and durability of the photoanode after four continuous repetition usages while the assessed electrical energy efficiency revealed the economic viability of PFC system serving as a post-treatment for abatement of POME. These findings contributed toward enhancing the sustainability criteria and economic viability of palm oil by adopting sustainable and efficient POME post-treatment technology.

在过硫酸盐氧化剂促进的光催化燃料电池中同步处理稀释的棕榈油厂污水(POME)并发电。
由于马来西亚棕榈油生产的蓬勃发展,所产生的棕榈油厂废水(POME)因其高度污染的特性而构成了严重威胁。在环境保护日益受到关注的背景下,POME 的污染消减以及从废水中回收能源的潜力已成为一个备受关注的研究课题。本研究成功设计了一种先进的光催化燃料电池(PFC)系统,该系统采用 ZnO/Zn 纳米棒阵列(NRA)光阳极、CuO/Cu 阴极和过硫酸盐(PS)氧化剂,可改善 POME 的处理并同时产生能量。通过场发射扫描电子显微镜(FESEM)、X 射线衍射(XRD)、能量色散 X 射线(EDX)以及布鲁纳、艾美特和特勒分析(BET),制备并表征了光电极。由于 PS 的强氧化剂特性,所提出的 PFC/PS 系统表现出卓越的性能,化学需氧量(COD)去除率达到 96.2%,开路电压(Voc)达到 740.0 mV,短路电流密度(Jsc)达到 146.7 μA cm-2,功率密度(Pmax)达到 35.6 μW cm-2。在过硫酸盐氧化剂为 2.5 mM、POME 稀释因子为 1:20、天然溶液 pH 值为 8.51 的最佳条件下,PFC/PS 系统性能卓越。随后,通过自由基清除研究和莫特-肖特基(M-S)分析,阐明了假定的光电催化 POME 处理机制。随后的回收测试证实了光阳极在连续四次重复使用后的稳定性和耐用性,而电能效率评估则揭示了 PFC 系统作为消除 POME 后处理方法的经济可行性。这些发现有助于通过采用可持续和高效的 POME 后处理技术来提高棕榈油的可持续性标准和经济可行性。
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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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