Noubactep, Chicgoua

[["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","14"],["dc.contributor.affiliation","Ndé-Tchoupé, Arnaud Igor; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; bernardowuraku@yahoo.com (B.K.-A.); rhu@hhu.edu.cn (R.H.)"],["dc.contributor.affiliation","Konadu-Amoah, Bernard; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; bernardowuraku@yahoo.com (B.K.-A.); rhu@hhu.edu.cn (R.H.)"],["dc.contributor.affiliation","Gatcha-Bandjun, Nadège; 2Faculty of Science, Department of Chemistry, University of Maroua, Maroua P.O. Box 46, Cameroon; nadegegatcha@yahoo.fr"],["dc.contributor.affiliation","Hu, Rui; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; bernardowuraku@yahoo.com (B.K.-A.); rhu@hhu.edu.cn (R.H.)"],["dc.contributor.affiliation","Gwenzi, Willis; 3Biosystems and Environmental Engineering Research Group, Department of Agricultural and Biosystems Engineering, University of Zimbabwe, Mount Pleasant, Harare P.O. Box MP167, Zimbabwe; wgwenzi@yahoo.co.uk"],["dc.contributor.affiliation","Noubactep, Chicgoua; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; bernardowuraku@yahoo.com (B.K.-A.); rhu@hhu.edu.cn (R.H.)"],["dc.contributor.author","Ndé-Tchoupé, Arnaud Igor"],["dc.contributor.author","Konadu-Amoah, Bernard"],["dc.contributor.author","Gatcha-Bandjun, Nadège"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2022-08-04T08:27:43Z"],["dc.date.available","2022-08-04T08:27:43Z"],["dc.date.issued","2022-07-26"],["dc.date.updated","2022-08-03T11:29:56Z"],["dc.description.abstract","This article critically evaluates the conventional Kanchan Arsenic Filter (KAF) in order to determine the main reasons for its reported poor performance. The KAF was introduced in 2004 in Nepal and makes use of non-galvanized nails as a Fe0 source for As removal. As early as 2009, the KAF was demonstrated to be ineffective for As removal in many cases. This was unambiguously attributed to the Fe0 layer which is placed on top of a sand filter instead of being incorporated into a sand matrix. Despite this conceptual mistake, the conventional KAF has been largely distributed in Asia, and recent articles have assessed its sustainability. This study reiterates that the suitability of the technology, rather than its sustainability, should be addressed. Evidence shows that the KAF has the following design limitations: (i) uses iron nails of unknown reactivity, and (ii) operates on the principle of a wet/dry cycle. The latter causes a decrease in the corrosion rate of the used nails, thereby limiting the availability of the iron corrosion products which act as contaminant scavengers. Taken together, these results confirm the unsuitability of the conventional KAF. Besides correcting the design mistakes, more attention should be paid to the intrinsic reactivity of the used iron nails, including using alternative Fe0 materials (e.g., iron filings, steel wool) for filters lasting for just 6 or 18 months. Specific design considerations to be addressed in the future are highlighted."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.3390/w14152318"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/112625"],["dc.language.iso","en"],["dc.relation.eissn","2073-4441"],["dc.rights","CC BY 4.0"],["dc.title","Kanchan Arsenic Filters for Household Water Treatment: Unsuitable or Unsustainable?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","217"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Applied Water Science"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Konadu-Amoah, Bernard"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Cao, Viet"],["dc.contributor.author","Tao, Ran"],["dc.contributor.author","Yang, Huichen"],["dc.contributor.author","Ndé-Tchoupé, Arnaud I."],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Ruppert, Hans"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2022-08-12T12:13:44Z"],["dc.date.available","2022-08-12T12:13:44Z"],["dc.date.issued","2022-08-02"],["dc.date.updated","2022-08-07T03:11:44Z"],["dc.description.abstract","Metallic iron (Fe0) has been increasingly used to remove toxics from water over the past three decades. However, the idea that metallic iron (Fe0) is not an environmental reducing agent has been vigorously refuted. Researchers presenting their findings in a scientific journal have to accept the burden of proving that their argument has any validity. This 30-year-lasting discussion within the Fe0 remediation community is alien to electro-chemists, as it is a century-old knowledge. Nevertheless, the peer-reviewed literature on “remediation using Fe0” seems to be dominated by evaluators thinking that Fe0 is a reducing agent. This communication challenges the view that Fe0 donates any electron to any dissolved species. The sole goal is to reconcile a proven efficient technology with its scientific roots and enable the design of better Fe0 remediation systems."],["dc.identifier.citation","Applied Water Science. 2022 Aug 02;12(9):217"],["dc.identifier.doi","10.1007/s13201-022-01738-9"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/112720"],["dc.language.iso","en"],["dc.rights","CC BY 4.0"],["dc.rights.holder","The Author(s)"],["dc.subject","Electrochemical dissolution kinetics"],["dc.subject","Groundwater remediation"],["dc.subject","Permeable reactive barrier"],["dc.subject","Water treatment"],["dc.subject","Zero-valent iron"],["dc.title","Realizing the potential of metallic iron for the mitigation of toxics: flee or adapt?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]