dc.creatorKumar, Pratik
dc.creatorHegde, Krishnamoorthy
dc.creatorBrar, Satinder Kaur
dc.creatorCledón, Maximiliano
dc.creatorKermanshahi-pour, Azadeh
dc.creatorRoy-Lachapelle, Audrey
dc.creatorGalvez-Cloutier, Rosa
dc.date.accessioned2020-03-11T15:33:43Z
dc.date.accessioned2022-10-14T21:39:41Z
dc.date.available2020-03-11T15:33:43Z
dc.date.available2022-10-14T21:39:41Z
dc.date.created2020-03-11T15:33:43Z
dc.date.issued2018-11
dc.identifierKumar, Pratik; Hegde, Krishnamoorthy; Brar, Satinder Kaur; Cledón, Maximiliano; Kermanshahi-pour, Azadeh; et al.; Biodegradation of microcystin-LR using acclimatized bacteria isolated from different units of the drinking water treatment plant; Elsevier; Environmental Pollution; 242; Part A; 11-2018; 407-416
dc.identifier0269-7491
dc.identifierhttp://hdl.handle.net/11336/99125
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4309660
dc.description.abstractBacterial community isolated from different units of a Drinking Water Treatment Plant (DWTP) including pre-ozonation unit (POU), the effluent-sludge mixture of the sedimentation unit (ESSU) and top-sand layer water sample from the filtration unit (TSFU) were acclimatized separately in the microcystin-leucine arginine (MC-LR)-rich environment to evaluate MC-LR biodegradation. Maximum biodegradation efficiency of 97.2 ± 8.7% was achieved by the acclimatized-TSFU bacterial community followed by 72.1 ± 6.4% and 86.2 ± 7.3% by acclimatized-POU and acclimatized-ESSU bacterial community, respectively. Likewise, the non-acclimatized bacterial community showed similar biodegradation efficiency of 71.1 ± 7.37%, 86.7 ± 3.19% and 94.35 ± 10.63% for TSFU, ESSU and POU, respectively, when compared to the acclimatized ones. However, the biodegradation rate increased 1.5-folds for acclimatized versus non-acclimatized conditions. The mass spectrometry studies on MC-LR degradation depicted hydrolytic linearization of cyclic MC-LR along with the formation of small peptide fragments including Adda molecule that is linked to the reduced toxicity (qualitative toxicity analysis). This was further confirmed quantitatively by using Rhizobium meliloti as a bioindicator. The acclimatized-TSFU bacterial community comprised of novel MC-LR degrading strains, Chryseobacterium sp. and Pseudomonas fragi as confirmed by 16S rRNA sequencing. Biodegradation of microcystin-LR by in-situ bacterial community present in the drinking water treatment plant without formation of toxic by-product.
dc.languageeng
dc.publisherElsevier
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.envpol.2018.07.008
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0269749118314957
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectACCLIMATIZED BACTERIA
dc.subjectDEGRADATION PATHWAY
dc.subjectDRINKING WATER
dc.subjectMICROCYSTIN
dc.subjectTOXICITY
dc.titleBiodegradation of microcystin-LR using acclimatized bacteria isolated from different units of the drinking water treatment plant
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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