Reduction of sulphur dioxide emission into the environment by adsorption on enhanced α-hematite surface.

Autor: Jeyapaul AS; Mass Transfer Group, School of Chemical Engineering, Vellore Institute of Technology, Tamil Nadu, Vellore, 632014, India.; Chemical Engineering Department, College of Engineering and Technology, Samara University, Semera, Afar Region, Ethiopia., Ganesapillai M; Mass Transfer Group, School of Chemical Engineering, Vellore Institute of Technology, Tamil Nadu, Vellore, 632014, India. maheshgpillai@vit.ac.in.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2022 Oct 12; Vol. 194 (12), pp. 871. Date of Electronic Publication: 2022 Oct 12.
DOI: 10.1007/s10661-022-10531-9
Abstrakt: The top priority of the sustainable development goals is to improve the quality of the environment for better living. Sulphur dioxide is considered more hazardous than any other gases that pollute the environment and harm the well-being of organisms. In 2019, India alone accounted for 21% of the world's SO 2 emissions. Strict action is required to reduce maximum levels of SO 2 emission to the atmosphere to improve the total air quality. To reduce SO 2 emissions more effectively, in this study, α-hematite was chemically activated by using 5% NaOH and C 2 H 5 OH with the help of a double bed adsorption column. The adsorbent properties of α-hematite were studied by Brunauer-Emmett-Teller isotherm, which revealed a high surface area (539 m 2  g -1 ), and pore size (2.3125 nm) and high volume in the pore (0.0293432 cm 3  mg -1 ). FTIR confirmed that the SO 2 particulate on the surface of the adsorbent with an adsorption capacity of 95%. The operating temperature of 40-50 °C was optimal for the chemical adsorption. It was found that the inlet concentration (64 mg m -3 ) of SO 2 decreases as the adsorption of SO 2 increases. Trace SO 2 was well-adsorbed by the adsorbent, which resulted in a mass transfer zone. Freundlich's adsorption spectrum was more fit for low concentrated SO 2 than Langmuir isotherm. The results indicate that the environmental emission of SO 2 can be reduced with chemically enhanced α-hematite.
(© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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