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dc.contributor.authorFeistel, Ulrike
dc.contributor.authorOtter, Philipp
dc.contributor.authorKunz, Sylvie
dc.contributor.authorGrischek, Thomas
dc.contributor.authorFeller, Joerg
dc.date.accessioned2021-08-24T03:45:23Z
dc.date.available2021-08-24T03:45:23Z
dc.date.issued2016
dc.identifier.issn2214-7144
dc.identifier.doi10.1016/j.jwpe.2016.10.006
dc.identifier.urihttp://hdl.handle.net/10072/407224
dc.description.abstractAddressing the lack of viable solutions for water treatment in small rural communities, this paper describes the test of a system for the removal of arsenic. The SuMeWa|SYSTEM (AUTARCON GmbH) disinfects water using in-line electrolysis for the production of chlorine. In order to remove arsenic this approach has been extended using chlorine as oxidant for the trivalent arsenic and bivalent iron. Following the adsorption of arsenic on the freshly precipitated iron(hydr)oxide, Greensand plus™ is used for filtration of the co-precipitate. By using a manganese dioxide coated medium, gaps in the chlorine production can be bridged through the reduction of the MnO2 which is later regenerated when sufficient chlorine is available. The first pilot system was tested and evaluated during the period from April to July 2015 at a site in Germany, Niederfrauendorf, where high concentrations of arsenic had been found in groundwater. After adjustments to the initial set-up the system worked stable during the evaluation period at a flow rate of 60 L/h removing on average 96 % of arsenic and 99 % of iron from the groundwater. The system treated groundwater of mean concentrations of total arsenic of 300 μg/L (of which 79 μg/L were dissolved arsenic) and up to a maximum concentration of 990 μg/L and concentrations of iron of 7.1 mg/L. Arsenic was removed to concentrations of 11 μg/L (dissolved arsenic) and iron to concentrations of 0.04 mg/L. Increasing concentration of arsenic in the treated water when running the system without the electrolytic cell has proven that chlorine enhances the removal process through the fast oxidation of the trivalent arsenic compared to aeration. The mean concentration of chloride in the groundwater was 8 mg/L. This was sufficient for a mean chlorine production of 1.3 mg/L used for oxidation and disinfection. Generally the system proved to be robust and worked reliably once the components had been adjusted to the local groundwater quality.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofpagefrom77
dc.relation.ispartofpageto85
dc.relation.ispartofjournalJournal of Water Process Engineering
dc.relation.ispartofvolume14
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchEnvironmental engineering
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4011
dc.subject.keywordsScience & Technology
dc.subject.keywordsTechnology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsEngineering, Environmental
dc.subject.keywordsEngineering, Chemical
dc.titleField tests of a small pilot plant for the removal of arsenic in groundwater using coagulation and filtering
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationFeistel, U; Otter, P; Kunz, S; Grischek, T; Feller, J, Field tests of a small pilot plant for the removal of arsenic in groundwater using coagulation and filtering, Journal of Water Process Engineering 2016, 14, pp. 77-85
dc.date.updated2021-08-24T03:44:03Z
gro.hasfulltextNo Full Text
gro.griffith.authorKunz, Sylvie


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