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- W3200922761 endingPage "119686" @default.
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- W3200922761 abstract "Hydrogen sulfide (H2S) is a major air pollutant posing a serious threat to the environment and public health. It is highly attractive to develop state-of-the-art adsorbent to remove H2S. Herein, a novel ZnFe2O4-loaded porous biochar (RZF) with a high surface area of 1065 m2/g was synthesized via one-step carbonation activation of kitchen leftover rice with ZnCl2 and FeCl3 as activators. The optimized RZF-500-1:1 was obtained by rationally adjusting the activation ratio (the mass ratio of leftover rice and ZnFe2O4) and pyrolysis temperature. Such RZF-500-1:1 delivered high-performance H2S removal with the breakthrough capacity up to 228.29 mg/g at 25 °C, whilst the inactivated biochar (carbonization without activator) only showed a much lower adsorption capacity at circa 12.11 mg/g of H2S. The desulfurization conditions had a significant effect on the H2S breakthrough capacity, and the adsorbent exhibited better desulfurization performance at room temperature and in the presence of oxygen. The desulfurization mechanism on the ZnFe2O4-loaded biochar was proposed to be an adsorption-catalytic oxidation coupled process. Moreover, the as-fabricated sample showed high regeneration ability, retaining 91.6% of the initial breakthrough capacity after five regeneration cycles. This novel one-step preparation method would permit a gain of time and energy to obtain efficient activated carbons intended to capture H2S." @default.
- W3200922761 created "2021-09-27" @default.
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- W3200922761 date "2021-12-01" @default.
- W3200922761 modified "2023-10-16" @default.
- W3200922761 title "One-step synthesis of ZnFe2O4-loaded biochar derived from leftover rice for high-performance H2S removal" @default.
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- W3200922761 doi "https://doi.org/10.1016/j.seppur.2021.119686" @default.
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