Effect of electrode modification on the production of electrical energy and degradation of Cr (Ⅵ) waste using tubular microbial fuel cell

IF 1.6 Q4 ENVIRONMENTAL SCIENCES AIMS Environmental Science Pub Date : 2022-01-01 DOI:10.3934/environsci.2022030
R. Darmawan, S. Juliastuti, N. Hendrianie, O. Rachmaniah, Nadila Shafira Kusnadi, Ghassani Salsabila Ramadhani, Yawo Serge Marcel, Simpliste Dusabe, M. Tominaga
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引用次数: 4

Abstract

Carcinogenic hexavalent chromium is increasing worldwide due to the increased electroplating, welding and textile industry. On the other hand, molasses, the sugar factory's byproduct with high organic compounds (sugars), may pollute the environment if it is not processed. However, microbial fuel cell (MFC) seems to be a promising technology due to its ability to produce electrical energy from pollutant degradation using microbes while reducing hexavalent chromium to trivalent chromium with less toxicity. Carbon felt was used at both electrodes. This research aimed to determine the effect of modifying the anode with rice bran and cathode with Cu catalyst towards electricity generation and pollutant removal in molasses and reducing Cr (Ⅵ) into Cr (Ⅲ) using tubular microbial fuel cells. Moreover, the effect of mixing Sidoarjo mud and Shewanella oneidensis MR-1 as electricigen bacteria toward electrical energy production and pollutant removal was determined. Experiments revealed that the S/CM/AM variable, which only used Shewanella oneidensis MR-1 as an electricigen bacteria with both modified electrodes, produced the highest total power density of 530.42 mW/m2 and the highest percentage of Cr (Ⅵ) reduction of 98.87%. In contrast, the highest microbial population of 66.5 × 1010 cells/mL, 61.28% of Biological Oxygen Demand (BOD5) removal and 59.49% of Chemical Oxygen Demand (COD) were achieved by SSi/CM/AM variable, mixing Shewanella oneidensis MR-1 and Sidoarjo mud as an electricigen bacteria with both modified electrodes. Therefore, this study indicates that double chamber tubular microbial fuel cells may be a sustainable solution for managing molasses and carcinogen hexavalent chromium.
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电极修饰对管状微生物燃料电池产生电能和降解Cr(Ⅵ)废物的影响
由于电镀、焊接和纺织工业的发展,致癌物六价铬在世界范围内不断增加。另一方面,糖蜜是糖厂的副产品,含有高有机化合物(糖),如果不加工,可能会污染环境。然而,微生物燃料电池(MFC)似乎是一种很有前途的技术,因为它能够利用微生物从污染物降解中产生电能,同时以较小的毒性将六价铬还原为三价铬。两个电极都使用了碳毡。本研究旨在确定用米糠修饰阳极和用Cu催化剂修饰阴极对使用管状微生物燃料电池发电和去除糖蜜中的污染物以及将Cr(Ⅵ)还原为Cr(Ⅲ)的影响。此外,还确定了Sidoarjo泥浆和希瓦氏菌MR-1混合作为电细菌对电能生产和污染物去除的影响。实验结果表明,在S/CM/AM变量中,仅使用希瓦氏菌MR-1作为电细菌,两种修饰电极的总功率密度最高,为530.42 mW/m2, Cr(Ⅵ)的还原率最高,为98.87%。以SSi/CM/AM为变量,混合希瓦氏菌MR-1和Sidoarjo泥作为电菌,两种修饰电极的微生物数量最高,为66.5 × 1010个细胞/mL,生物需氧量(BOD5)去除率为61.28%,化学需氧量(COD)去除率为59.49%。因此,这项研究表明,双室管状微生物燃料电池可能是管理糖蜜和致癌物六价铬的可持续解决方案。
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来源期刊
AIMS Environmental Science
AIMS Environmental Science ENVIRONMENTAL SCIENCES-
CiteScore
2.90
自引率
0.00%
发文量
31
审稿时长
5 weeks
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