Alkylphenols and Chlorophenols Remediation in Vertical Flow Constructed Wetlands: Removal Efficiency and Microbial Community Response
| Autor: | Inês P. F. M. Montenegro, Ana P. Mucha, C. M. R. Almeida, Carlos A.R. Gomes, Maria Paola Tomasino |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Bioaugmentation
Hyphomicrobiaceae lcsh:Hydraulic engineering Rhodocyclaceae Geography Planning and Development 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry bacterial community Biostimulation 03 medical and health sciences chemistry.chemical_compound lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 octylphenol Organic matter pentachlorophenol 030304 developmental biology 0105 earth and related environmental sciences Water Science and Technology chemistry.chemical_classification Chlorophenol 0303 health sciences lcsh:TD201-500 vertical flow constructed wetlands biology nonylphenol Phragmites australis biology.organism_classification Pentachlorophenol chemistry Microbial population biology Environmental chemistry |
| Zdroj: | Water Volume 13 Issue 5 Water, Vol 13, Iss 715, p 715 (2021) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w13050715 |
| Popis: | This study aims to investigate the effect of two different groups of phenolic compounds (the alkylphenols nonylphenol (NP) and octylphenol (OP), and the chlorophenol pentachlorophenol (PCP)) on constructed wetlands (CWs) performance, including on organic matter, nutrients and contaminants removal efficiency, and on microbial community structure in the plant bed substrate. CWs were assembled at lab scale simulating a vertical flow configuration and irrigated along eight weeks with Ribeira de Joane (an urban stream) water not doped (control) or doped with a mixture of NP and OP or with PCP (at a 100 μg L−1 concentration each). The presence of the phenolic contaminants did not interfere in the removal of organic matter or nutrients in CWs in the long term. Removals of NP and OP were > 99%, whereas PCP removals varied between 87% and 98%, mainly due to biodegradation. Microbial richness, diversity and dominance in CWs substrate were generally not affected by phenolic compounds, with only PCP decreasing diversity. Microbial community structure, however, showed that there was an adaptation of the microbial community to the presence of each contaminant, with several specialist genera being enriched following exposure. The three more abundant specialist genera were Methylotenera and Methylophilus (methylophilaceae family) and Hyphomicrobium (hyphomicrobiaceae family) when the systems were exposed to a mixture of NP and OP. When exposed to PCP, the three more abundant genera were Denitromonas (Rhodocyclaceae family), Xenococcus_PCC_7305 (Xenococcaceae family) and Rhodocyclaceae_uncultured (Rhodocyclaceae family). To increase CWs efficiency in the elimination of phenolic compounds, namely PCP which was not totally removed, strategies to stimulate (namely biostimulation) or increase (namely bioaugmentation) the presence of these bacteria should be explore. This study clearly shows the potential of vertical flow CWs for the removal of phenolic compounds, a still little explored subject, contributing to promote the use of CWs as nature-based solutions to remediate water contaminated with different families of persistent and/or emergent contaminants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|