Mitigating antibiotic pollution using cyanobacteria: removal efficiency, pathways and metabolism

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dc.contributor.authorPan, Minmin
dc.contributor.authorLyu, Tao
dc.contributor.authorZhan, Lumeng
dc.contributor.authorMatamoros, Victor
dc.contributor.authorAngelidaki, Irini
dc.contributor.authorCooper, Mick
dc.contributor.authorPan, Gang
dc.date.accessioned2020-12-18T16:35:26Z
dc.date.available2020-12-18T16:35:26Z
dc.date.issued2020-12-08
dc.description.abstractThe occurrence of pharmaceuticals and personal care products (PPCPs) in wastewater poses huge environmental threats, even at trace concentrations, and novel approaches are urged due to the inefficiencies of conventional wastewater treatment plants, especially when processing contaminants at high concentrations. Meanwhile, another widespread problem in the aquatic domain is the occurrence of harmful algal blooms (HABs) which cause serious damage to the ecosystem, but have rarely been investigated for possible valorization. This study investigated the possibilities, mechanisms, and effects of toxin release of using a harmful cyanobacterial species, Microcystis aeruginosa (M. aeruginosa), in order to remove the widely used drug, tetracycline, at high concentration. The results were compared with the performance obtained by the use of the hitherto generally-selected chlorophyte alga Chlorella pyrenoidosa (C. pyrenoidosa) for tetracycline concentrations of 10-100 mg L−1. M. aeruginosa exhibited a much more effective and rapid tetracycline removal (over 98.0% removal in 2 days) than did C. pyrenoidosa (36.7%-93.9% in 2 days). A comprehensive kinetic investigation into probable removal pathways indicated that, theoretically, bio-remediation dominated the process by M. aeruginosa (71.6%), while only accounting for 20.5% by C. pyrenoidosa. Both microalgae promoted the hydrolysis of tetracycline under conditions of increased pH and inhibited abiotic photolytic reactions by the shading effect to the water column, when compared with control experiments. Although identical degradation by-products were identified from treatments by both microalgal species, distinct by-products were also confirmed, unique to each treatment. Moreover, the growth of M. aeruginosa biomass exhibited strong tolerance to tetracycline exposure and released significantly lower levels of microcystin-LR, compared with the control systems. This study supports the possibility of reusing HABs species for the effective remediation of antibiotics at high concentrations. We have further suggested possible mechanisms for remediation and demonstrated control of toxin release.en_UK
dc.identifier.citationPan M, Lyu T, Zhan L, et al., (2020) Mitigating antibiotic pollution using cyanobacteria: removal efficiency, pathways and metabolism. Water Research, Volume 90, February 2021, Article number 116735en_UK
dc.identifier.issn0043-1354
dc.identifier.urihttps://doi.org/10.1016/j.watres.2020.116735
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16103
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectHarmful Algal Blooms (HABs)en_UK
dc.subjectMicroalgaeen_UK
dc.subjectMicropollutantsen_UK
dc.subjectMicrocystin controlen_UK
dc.subjectPPCPsen_UK
dc.titleMitigating antibiotic pollution using cyanobacteria: removal efficiency, pathways and metabolismen_UK
dc.typeArticleen_UK

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