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Fungi extracellular enzyme-containing microcapsules enhance degradation of sulfonamide antibiotics in mangrove sediments

Abstract

Mangroves represent a special coastal vegetation along the coastlines of tropical and subtropical regions. Sulfonamide antibiotics (SAs) are the most commonly used antibiotics. The application of white-rot fungi extracellular enzyme-containing microcapsules (MC) for aerobic degradation of SAs in mangrove sediments was investigated in this study. Degradation of three SAs, sulfamethoxazole (SMX), sulfadimethoxine (SDM), and sulfamethazine (SMZ), was enhanced by adding MC to the sediments. The order of SA degradation in batch experiments was SMX > SDM > SMZ. Bioreactor experiments revealed that SA removal rates were higher with than without MC. The enhanced SA removal rates with MC persisted with three re-additions of SAs. Thirteen bacteria genera (Achromobacter, Acinetobacter, Alcaligenes, Aquamicrobium, Arthrobacter, Brevundimonas, Flavobacterium, Methylobacterium, Microbacterium, Oligotropha, Paracoccus, Pseudomonas, and Rhodococcus) were identified to be associated with SA degradation in mangrove sediments by combination of next-generation sequencing, bacterial strain isolation, and literature search results. Results of this study suggest that MC could be used for SA removal in mangrove sediments.

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Funding

This research was supported by the Ministry of Science and Technology, Taiwan (grant no. MOST 104-2313-B-031-001-MY3).

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Correspondence to Bea-Ven Chang.

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The authors declare that they have no conflict of interest.

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Responsible editor: Philippe Garrigues

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Yang, CW., Tsai, LL. & Chang, BV. Fungi extracellular enzyme-containing microcapsules enhance degradation of sulfonamide antibiotics in mangrove sediments. Environ Sci Pollut Res 25, 10069–10079 (2018). https://doi.org/10.1007/s11356-018-1332-8

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  • DOI: https://doi.org/10.1007/s11356-018-1332-8

Keywords

  • Sulfonamide antibiotics
  • Degradation
  • Mangrove sediment
  • Microbial community
  • Microcapsules