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Management of solid waste after used motor oil recovery via production of zeolite A

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Abstract

The attempt of the current study is to find an eco-friendly method for managing the solid waste deposited in the landfill of used motor oil recovery factories through the fabrication of zeolite-based compounds. This toxic waste is originated from the application of natural bentonite, traditionally used as an effective adsorbent in the recovery process. The black waste was converted to zeolite structures through the fusion technique. Firstly, the collected powder was mixed with sodium hydroxide, and boehmite followed by the thermal treatment at different temperatures, 600–800 °C. Then, the obtained precursors were hydrothermally converted to zeolite A or hydroxysodalite. The effects of processing factors like alkalinity, boehmite, and sodium aluminate ratios (respect to solid waste mass), fusion temperature, and aging time on the structural characteristics, and cation exchange capacity (CEC) were studied in detail. In order to achieve a cation exchange capacity of about 190 mg g−1, the alkali and boehmite ratios should be adjusted at 2.00 and 0.53, respectively. Based on the morphological observations, the fusion at 800 °C caused the formation of cubic particles with sharp edges. Besides, the hydrosodalite powder with the extended surface area, 77 m2 g−1, could be produced by fixing the boehmite, and sodium aluminate ratios at the levels of 0.13 and 0.40, respectively.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Contributions

FAAM performed the experiments and characterizations. AS supervised and conceptualized the data regarding the conversion of solid waste into products. SS was a major contributor in consultation, writing, reviewing, and editing the manuscript.

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Correspondence to Amin Salem.

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The authors declare no competing interests.

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Communicated by Ta Yeong Wu

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Mamaghani, F.A.A., Salem, A. & Salem, S. Management of solid waste after used motor oil recovery via production of zeolite A. Environ Sci Pollut Res 29, 55877–55889 (2022). https://doi.org/10.1007/s11356-022-19749-z

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  • DOI: https://doi.org/10.1007/s11356-022-19749-z

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