Stimulating bioelectric generation and recovery of toxic metals through benthic microbial fuel cell driven by local sago (Cycas revoluta) waste

Daud, Najwa Najihah Mohamad; Al-Zaqri, Nabil; Yaakop, Amira Suriaty; Ibrahim, Mohamad Nasir Mohamad; Guerrero-Barajas, Claudia

doi:10.1007/s11356-024-32372-4

Cited by 1 publication

(1 citation statement)

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“…This high COD elimination rate is related to the high values of electric currents generated because, according to Aleid et al (2023), high electron production gradually reduces COD values [42]. It has also been shown that in this type of water, a great variety of microorganisms use the compounds present for their metabolism as carbon sources and that the elimination of COD and generation of current are compatible [43]. Table 3 shows the concentration values of the metals analyzed in the bioremediation process.…”

Section: Results and Analysismentioning

confidence: 99%

The Potential Use of Pseudomonas stutzeri as a Biocatalyst for the Removal of Heavy Metals and the Generation of Bioelectricity

Segundo,

De La Cruz-Noriega,

Cabanillas-Chirinos

et al. 2024

Fermentation

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Currently, industry in all its forms is vital for the human population because it provides the services and goods necessary to live. However, this process also pollutes soils and rivers. This research provides an environmentally friendly solution for the generation of electrical energy and the bioremediation of heavy metals such as arsenic, iron, and copper present in river waters used to irrigate farmers’ crops. This research used single-chamber microbial fuel cells with activated carbon and zinc electrodes as anodes and cathodes, respectively, and farmers’ irrigation water contaminated with mining waste as substrate. Pseudomonas stutzeri was used as a biocatalyst due to its ability to proliferate at temperatures between 4 and 44 °C—at which the waters that feed irrigated rivers pass on their way to the sea—managing to generate peaks of electric current and voltage of 4.35 mA and 0.91 V on the sixth day, which operated with an electrical conductivity of 222 mS/cm and a pH of 6.74. Likewise, the parameters of nitrogen, total organic carbon, carbon lost on the ignition, dissolved organic carbon, and chemical oxygen demand were reduced by 51.19%, 79.92%, 64.95%, 79.89%, 79.93%, and 86.46%. At the same time, iron, copper, and arsenic values decreased by 84.625, 14.533, and 90.831%, respectively. The internal resistance values shown were 26.355 ± 4.528 Ω with a power density of 422.054 mW/cm2 with a current density of 5.766 A/cm2. This research gives society, governments, and private companies an economical and easily scalable prototype capable of simultaneously generating electrical energy and removing heavy metals.

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Section: Results and Analysismentioning

confidence: 99%