Microbial community dynamics associated with veterinary antibiotics removal in constructed wetlands microcosms

Fernandes, Joana P.; Almeida, C. Marisa R.; Pereira, Ana Carolina Amaral; Ribeiro, Iolanda; Reis, Izabela; Carvalho, Pedro N.; Basto, M. Clara P.; Mucha, Ana P.

doi:10.1016/j.biortech.2015.01.096

Cited by 109 publications

(32 citation statements)

References 33 publications

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“…This indicates the initial wastewaters may have had other non-identified toxic compound that the systems were not able to remove. These results are in agreement with the ones observed in Fernandes et al [7].…”

Section: Discussionsupporting

confidence: 94%

“…Regarding toxicity evaluation, the initial wastewaters presented percentages of inhibition of bacterial activity between 75% and 95%. Carvalho et al [26] and Fernandes et al [7] observed higher values for toxicity present in livestock effluents (>99%).…”

Section: Discussionmentioning

confidence: 95%

“…These systems use plants and microorganisms as a biological approach for degradation and removal of contaminants [7]. In this study the capability of CWs, with P. australis, to treat saline aquaculture effluents and to remove two antibiotics (ENR and OXY) widely used in aquaculture as well as antibiotic resistance bacteria was investigated.…”

Section: Discussionmentioning

confidence: 99%

“…The direct influence of the plants and soil adsorption was not studied, although Carvalho et al [26] and Fernandes et al [7] have shown that there can be removals of 94% for tetracycline and 98% for ENR from pig farm effluents followed by soil removal. Carvalho et al [13] has shown P. australis can uptake ENR.…”

Section: Discussionmentioning

confidence: 99%

“…Although found at low concentrations, antibiotics remain in the aquatic environment for years causing serious toxic effects [7] and promoting the development of antibiotic resistant bacteria and genes due to selective pressure [2,8]. This can reduce ca.…”

Section: Introductionmentioning

confidence: 99%

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Potential of Constructed Wetlands for Removal of Antibiotics from Saline Aquaculture Effluents

Bôto

Almeida

Mucha

2016

Water

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Abstract:This work aimed to evaluate the potential of constructed wetlands (CWs) for removal of antibiotics (enrofloxacin and oxytetracycline) and antibiotic resistant bacteria from saline aquaculture wastewaters. Removal of other contaminants (nutrients, organic matter and metals) and toxicity reduction and the influence of antibiotics with these processes were evaluated. Thus, nine CWs microcosms, divided into three treatments, were assembled and used to treat wastewater (doped or not with the selected antibiotics) between October and December of 2015. Each week treated wastewater was removed and new wastewater (doped or not) was introduced in CWs. Results showed >99% of each antibiotic was removed in CWs. After three weeks of adaptation, removal percentages >95% were also obtained for total bacteria and for antibiotic resistant bacteria. Nutrients, organic matter and metal removal percentages in CWs treated wastewater were identical in the absence and in the presence of each antibiotic. Toxicity in treated wastewaters was significantly lower than in initial wastewaters, independently of antibiotics presence. Results showed CWs have a high efficiency for removing enrofloxacin or oxytetracycline as well as antibiotic resistant bacteria from saline aquaculture wastewaters. CWs can also remove other contaminants independently of drug presence, making the aquaculture wastewater possible to be reutilized and/or recirculated.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%