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Naproxen Sorption by Non-viable Rhizopus oryzae Biomass

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Abstract

Naproxen is an organic micropollutant widely distributed in municipal wastewaters and water bodies, it is not eliminated by wastewater treatment plants, and it accumulates in soil. In this research, the capability of the non-viable Rhizopus oryzae biomass (wet and dry) to sorb naproxen at environmentally relevant concentrations was assessed in batch experiments. Naproxen sorption was carried out as a function of pH and modeled by kinetic and equilibrium equations. Naproxen sorption increased with increasing pH values using wet biomass, but it also increased at acidic pH values with dried biomass. Dried biomass was more efficient and faster in removing naproxen and the maximum sorption was 1027.45 μg naproxen per gram of dried biomass at pH 4.7. Wet biomass sorption capacity was low and slow, and the equilibrium was achieved at 7 days, whereas with dried biomass at 26 h. Freundlich isotherm describes naproxen sorption by dried biomass.

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Funding

This research was financially supported by CONACYT grant no. 248132, México. Beatriz Melgoza thanks CONACYT for the scholarship (no. 234626).

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Correspondence to A. Tomasini.

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Melgoza, B., León-Santiesteban, H., López-Medina, R. et al. Naproxen Sorption by Non-viable Rhizopus oryzae Biomass. Water Air Soil Pollut 231, 30 (2020). https://doi.org/10.1007/s11270-020-4396-2

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  • DOI: https://doi.org/10.1007/s11270-020-4396-2

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