Impacts of a high-discharge submarine sewage outfall on water quality in the coastal zone of Salvador (Bahia, Brazil)

Handle URI:
http://hdl.handle.net/10754/609019
Title:
Impacts of a high-discharge submarine sewage outfall on water quality in the coastal zone of Salvador (Bahia, Brazil)
Authors:
Roth, Florian ( 0000-0003-4004-5863 ) ; Lessa, G.C.; Wild, C.; Kikuchi, R.K.P. ( 0000-0002-6271-7491 ) ; Naumann, M.S. ( 0000-0002-6870-291X )
Abstract:
Carbon and nitrogen stable isotopic signatures of suspended particulate organic matter and seawater biological oxygen demand (BOD) were measured along a coastal transect during summer 2015 to investigate pollution impacts of a high-discharge submarine sewage outfall close to Salvador, Brazil. Impacts of untreated sewage discharge were evident at the outfall site by depleted δ13Corg and δ15N signatures and 4-fold increased BOD rates. Pollution effects of a sewage plume were detectable for more than 6 km downstream from the outfall site, as seasonal wind- and tide-driven shelf hydrodynamics facilitated its advective transport into near-shore waters. There, sewage pollution was detectable at recreational beaches by depleted stable isotope signatures and elevated BOD rates at high tides, suggesting high bacterial activity and increased infection risk by human pathogens. These findings indicate the urgent necessity for appropriate wastewater treatment in Salvador to achieve acceptable standards for released effluents and coastal zone water quality.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Impacts of a high-discharge submarine sewage outfall on water quality in the coastal zone of Salvador (Bahia, Brazil) 2016, 106 (1-2):43 Marine Pollution Bulletin
Publisher:
Elsevier BV
Journal:
Marine Pollution Bulletin
Issue Date:
30-Mar-2016
DOI:
10.1016/j.marpolbul.2016.03.048
Type:
Article
ISSN:
0025326X
Sponsors:
We are grateful to the Institute of Geosciences at the Federal University of Bahia for logistical support. D. Dasbach, C. Staschock and D. Peterke (ZMT) are acknowledged for analytical support. RKPK is fellow (PQ-1D) of the National Council for the Scientific and Technological Development (CNPq). This work was funded by the European Commission 7th Framework Program Marie Curie Actions—People Grant PIRSES-GA-2011-295191 through the project SymbioCoRe (Synergies Through Merging Biological and Biogeochemical Expertise in Coral Research).
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0025326X16301783
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorRoth, Florianen
dc.contributor.authorLessa, G.C.en
dc.contributor.authorWild, C.en
dc.contributor.authorKikuchi, R.K.P.en
dc.contributor.authorNaumann, M.S.en
dc.date.accessioned2016-05-11T08:29:07Zen
dc.date.available2016-05-11T08:29:07Zen
dc.date.issued2016-03-30en
dc.identifier.citationImpacts of a high-discharge submarine sewage outfall on water quality in the coastal zone of Salvador (Bahia, Brazil) 2016, 106 (1-2):43 Marine Pollution Bulletinen
dc.identifier.issn0025326Xen
dc.identifier.doi10.1016/j.marpolbul.2016.03.048en
dc.identifier.urihttp://hdl.handle.net/10754/609019en
dc.description.abstractCarbon and nitrogen stable isotopic signatures of suspended particulate organic matter and seawater biological oxygen demand (BOD) were measured along a coastal transect during summer 2015 to investigate pollution impacts of a high-discharge submarine sewage outfall close to Salvador, Brazil. Impacts of untreated sewage discharge were evident at the outfall site by depleted δ13Corg and δ15N signatures and 4-fold increased BOD rates. Pollution effects of a sewage plume were detectable for more than 6 km downstream from the outfall site, as seasonal wind- and tide-driven shelf hydrodynamics facilitated its advective transport into near-shore waters. There, sewage pollution was detectable at recreational beaches by depleted stable isotope signatures and elevated BOD rates at high tides, suggesting high bacterial activity and increased infection risk by human pathogens. These findings indicate the urgent necessity for appropriate wastewater treatment in Salvador to achieve acceptable standards for released effluents and coastal zone water quality.en
dc.description.sponsorshipWe are grateful to the Institute of Geosciences at the Federal University of Bahia for logistical support. D. Dasbach, C. Staschock and D. Peterke (ZMT) are acknowledged for analytical support. RKPK is fellow (PQ-1D) of the National Council for the Scientific and Technological Development (CNPq). This work was funded by the European Commission 7th Framework Program Marie Curie Actions—People Grant PIRSES-GA-2011-295191 through the project SymbioCoRe (Synergies Through Merging Biological and Biogeochemical Expertise in Coral Research).en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0025326X16301783en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Marine Pollution Bulletin. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Marine Pollution Bulletin, 30 March 2016. DOI: 10.1016/j.marpolbul.2016.03.048en
dc.subjectMarine pollutionen
dc.subjectOceanic Disposal System of Rio Vermelhoen
dc.subjectCarbon and nitrogen stable isotopesen
dc.subjectBiological oxygen demanden
dc.subjectShelf hydrodynamicsen
dc.subjectHealth threaten
dc.titleImpacts of a high-discharge submarine sewage outfall on water quality in the coastal zone of Salvador (Bahia, Brazil)en
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalMarine Pollution Bulletinen
dc.eprint.versionPost-printen
dc.contributor.institutionCoral Reef Ecology Group, Leibniz Center for Tropical Marine Ecology (ZMT), 28359 Bremen, Germanyen
dc.contributor.institutionFaculty of Biology and Chemistry, University of Bremen, 28369 Bremen, Germanyen
dc.contributor.institutionDepartment of Oceanography, Institute of Geosciences, Federal University of Bahia (UFBA), 40170-110 Salvador, Bahia, Brazilen
dc.contributor.institutionCoral Reef and Global Changes Research Group (RECOR), Department of Oceanography, Institute of Geosciences, Federal University of Bahia (UFBA), 40170-110 Salvador, Bahia, Brazilen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorRoth, Florianen
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