Seasonal variation of organic matter concentration and characteristics in the Maji ya Chai River (Tanzania): Impact on treatability by ultrafiltration

Handle URI:
http://hdl.handle.net/10754/608646
Title:
Seasonal variation of organic matter concentration and characteristics in the Maji ya Chai River (Tanzania): Impact on treatability by ultrafiltration
Authors:
Aschermann, Geert; Jeihanipour, Azam; Shen, Junjie; Mkongo, Godfrey; Dramas, Laure ( 0000-0002-8883-2084 ) ; Croue, Jean-Philippe; Schäfer, Andrea ( 0000-0002-7019-0327 )
Abstract:
Many waters in Tanzania exhibit high concentrations of organic matter and dissolved contaminants such as fluoride. Due to bacteria and virus removal, ultrafiltration (UF) is an attractive option for drinking water treatment, and when coupled with adsorbents, may compete with other established processes like nanofiltration (NF) for lower contaminant concentrations. The results presented here examine the characteristics and treatability of tropical natural organic matter (NOM) by UF as a function of seasonal variation. The Tanzanian river Maji ya Chai was sampled monthly during one year. The composition of NOM in Maji ya Chai River is influenced strongly by precipitation. Total organic carbon (TOC), specific ultraviolet absorbance (SUVA) and concentration of allochthonous organics substances (such as humic substances (HS)) are elevated in periods following high precipitation, while TOC is lower and contains more biopolymers in the dry seasons. UF experiments with two regenerated cellulose membranes of different molecular weight cut-off (MWCO, 5 and 10 kDa) were conducted. UF is able to remove 50–95% of TOC with a seasonal variability of 10–20%. Due to the remaining NOM in the water that would contribute to disinfection by-product formation and bacterial regrowth, the physically disinfected water is more applicable for point of use systems than distribution or storage.
KAUST Department:
Water Desalination & Reuse Research Cntr
Citation:
Seasonal variation of organic matter concentration and characteristics in the Maji ya Chai River (Tanzania): Impact on treatability by ultrafiltration 2016 Water Research
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
7-May-2016
DOI:
10.1016/j.watres.2016.05.022
Type:
Article
ISSN:
00431354
Sponsors:
The German Academic Exchange Service (DAAD) and Gesellschaft von Freunden der TU Berlin e.V. is acknowledged for a travel scholarship for G.A., and the Energy Technology Partnership (ETP) with the Drinking Water Quality Regulator for Scotland (DWQR) for a PhD Scholarship for J.S. Leverhulme Royal Society Africa Award SADWAT-Tanzania is thanked for project funding and Merck Millipore (Bedford, USA) for membrane provision. NM-AIST LiSE has made the UV instrument available for usage. Bryce Richards is greatly appreciated for all-round project and logistics support. Anthony Szymczyk (University Rennes, France) has provided streaming potential measurements and Meteoblue AG (Basel, Switzerland) very kindly performed precipitation data modeling for the research. TANAPA is acknowledged for allowing Godfrey Mkongo to collect samples for this research in Arusha National Park. Technicians Julius (metal works) and Suleiman (wood work) are thanked for their qualified and creative support from makeshift workshops.
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0043135416303463
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Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorAschermann, Geerten
dc.contributor.authorJeihanipour, Azamen
dc.contributor.authorShen, Junjieen
dc.contributor.authorMkongo, Godfreyen
dc.contributor.authorDramas, Laureen
dc.contributor.authorCroue, Jean-Philippeen
dc.contributor.authorSchäfer, Andreaen
dc.date.accessioned2016-05-09T07:53:45Zen
dc.date.available2016-05-09T07:53:45Zen
dc.date.issued2016-05-07en
dc.identifier.citationSeasonal variation of organic matter concentration and characteristics in the Maji ya Chai River (Tanzania): Impact on treatability by ultrafiltration 2016 Water Researchen
dc.identifier.issn00431354en
dc.identifier.doi10.1016/j.watres.2016.05.022en
dc.identifier.urihttp://hdl.handle.net/10754/608646en
dc.description.abstractMany waters in Tanzania exhibit high concentrations of organic matter and dissolved contaminants such as fluoride. Due to bacteria and virus removal, ultrafiltration (UF) is an attractive option for drinking water treatment, and when coupled with adsorbents, may compete with other established processes like nanofiltration (NF) for lower contaminant concentrations. The results presented here examine the characteristics and treatability of tropical natural organic matter (NOM) by UF as a function of seasonal variation. The Tanzanian river Maji ya Chai was sampled monthly during one year. The composition of NOM in Maji ya Chai River is influenced strongly by precipitation. Total organic carbon (TOC), specific ultraviolet absorbance (SUVA) and concentration of allochthonous organics substances (such as humic substances (HS)) are elevated in periods following high precipitation, while TOC is lower and contains more biopolymers in the dry seasons. UF experiments with two regenerated cellulose membranes of different molecular weight cut-off (MWCO, 5 and 10 kDa) were conducted. UF is able to remove 50–95% of TOC with a seasonal variability of 10–20%. Due to the remaining NOM in the water that would contribute to disinfection by-product formation and bacterial regrowth, the physically disinfected water is more applicable for point of use systems than distribution or storage.en
dc.description.sponsorshipThe German Academic Exchange Service (DAAD) and Gesellschaft von Freunden der TU Berlin e.V. is acknowledged for a travel scholarship for G.A., and the Energy Technology Partnership (ETP) with the Drinking Water Quality Regulator for Scotland (DWQR) for a PhD Scholarship for J.S. Leverhulme Royal Society Africa Award SADWAT-Tanzania is thanked for project funding and Merck Millipore (Bedford, USA) for membrane provision. NM-AIST LiSE has made the UV instrument available for usage. Bryce Richards is greatly appreciated for all-round project and logistics support. Anthony Szymczyk (University Rennes, France) has provided streaming potential measurements and Meteoblue AG (Basel, Switzerland) very kindly performed precipitation data modeling for the research. TANAPA is acknowledged for allowing Godfrey Mkongo to collect samples for this research in Arusha National Park. Technicians Julius (metal works) and Suleiman (wood work) are thanked for their qualified and creative support from makeshift workshops.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0043135416303463en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Water Research. 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 Water Research, 7 May 2016. DOI: 10.1016/j.watres.2016.05.022en
dc.subjectOrganic matteren
dc.subjectSurface wateren
dc.subjectUltrafiltrationen
dc.subjectLiquid chromatography organic carbon detection (LC-OCD)en
dc.titleSeasonal variation of organic matter concentration and characteristics in the Maji ya Chai River (Tanzania): Impact on treatability by ultrafiltrationen
dc.typeArticleen
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalWater Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionNelson Mandela African Institute of Science and Technology, Department of Water and Environmental Science and Engineering, P.O. Box 447, Arusha, Tanzaniaen
dc.contributor.institutionKarlsruhe Institute of Technology, Institute of Functional Interfaces (IFG), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germanyen
dc.contributor.institutionSchool of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdomen
dc.contributor.institutionNgurdoto Defluoridation Research Station, P.O. Box 482, Usa River, Tanzaniaen
dc.contributor.institutionCurtin Water Quality Research Center, Department of Chemistry, Curtin University, Perth WA, Australiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorDramas, Laureen
kaust.authorCroue, Jean-Philippeen
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