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https://hdl.handle.net/1822/77529
Título: | The role of extracellular polymeric substances in micropollutant removal |
Autor(es): | Melo, A. R. B. Quintelas, Cristina Ferreira, Eugénio C. Mesquita, D. P. |
Palavras-chave: | aggregates polysaccharides proteins bioflocculation micropollutants |
Data: | 4-Mai-2022 |
Editora: | Frontiers Media |
Revista: | Frontiers in Chemical Engineering |
Citação: | Melo A, Quintelas C, Ferreira EC and Mesquita DP (2022) The Role of Extracellular Polymeric Substances in Micropollutant Removal. Front. Chem. Eng. 4:778469. doi: 10.3389/fceng.2022.778469 |
Resumo(s): | In biological wastewater treatment (WWT), microorganisms live and grow held together by a slime matrix comprised of extracellular polymeric substances (EPS), forming a three-dimensional microbial structure of aggregates (flocs or granules) and by chemical binding forces. Furthermore, microscopic observations showed that microbial cells within the flocs were cross linked with EPS, forming a network of polymers with pores and channels. The EPS are typically composed of organic substances such as polysaccharides (PS), proteins (PNs), humic acid substances (HAS), nucleic acids, and lipids. It has been established that EPS play an essential role in aggregate flocculation, settling, and dewatering. Moreover, in the presence of toxic substances, such as pharmaceutical compounds and pesticides, EPS form a protective layer for the aggregated biomass against environmental disturbances that might play an important role in the transport and transformation of micropollutants. Some researchers indicated that there is an increase in EPS concentration under toxic conditions, which can induce an increase in the size of microbial aggregates. In this contribution, we critically review the available information on the impact of micropollutants on microbial EPS production and the relationship between EPS and microbial aggregate structure. Also, a general definition, composition, and factors that affect EPS production are presented. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/77529 |
DOI: | 10.3389/fceng.2022.778469 |
e-ISSN: | 2673-2718 |
Versão da editora: | https://www.frontiersin.org/articles/10.3389/fceng.2022.778469/full |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_55532_1.pdf | 1,07 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons