Noubactep, Chicgoua

[["dc.bibliographiccitation.artnumber","4138"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Sustainability"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-09T11:49:39Z"],["dc.date.available","2019-07-09T11:49:39Z"],["dc.date.issued","2018"],["dc.description.abstract","Research on the use of metallic iron (Fe0) for environmental remediation and water treatment has taken off during the past three decades. The results achieved have established filtration on Fe0 packed beds as an efficient technology for water remediation at several scales. However, the further development of Fe0-based filtration systems is impaired by the non-professional behavior of scientists who ignore available advances in knowledge. The confusion is overcome when due consideration is given to the fact that revealing state-of-the-art knowledge is a prerequisite to presenting individual achievements."],["dc.description.sponsorship","Fundamental Research Funds for the Central Universities"],["dc.identifier.doi","10.3390/su10114138"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15732"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59598"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2071-1050"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","550"],["dc.title","Iron Corrosion: Scientific Heritage in Jeopardy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","30"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of New Developments in Chemistry"],["dc.bibliographiccitation.lastpage","34"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-09T11:54:23Z"],["dc.date.available","2019-07-09T11:54:23Z"],["dc.date.issued","2014"],["dc.description.abstract","Despite two decades of intensive research on using metallic iron (Fe0) for environmental remediation and water treatment, basic concerns about their efficiency still prevail. This communication presents the basic idea of the view that challenges the prevailing paradigm on the operating mode of Fe0/H2O systems. The alternative paradigm is in tune with the mainstream science on aqueous iron corrosion. Its large scale adoption will enable a scientifically based system design and increase the acceptance of this already proven efficient technology."],["dc.identifier.doi","10.14302/issn.2377-2549.jndc-12-172"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8991"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60645"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Metallic iron for water treatment: Healing a research community"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","13"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Radioanalytical and Nuclear Chemistry"],["dc.bibliographiccitation.lastpage","19"],["dc.bibliographiccitation.volume","267"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-09T11:54:22Z"],["dc.date.available","2019-07-09T11:54:22Z"],["dc.date.issued","2006"],["dc.description.abstract","The effects of Cl-, CO3 2-, EDTA, NO2 -, NO3 -, PO4 3-, SO4 2-, and humic substances (HS) on U(VI) co-precipitation from aqueous solutions by zerovalent iron (ZVI) in the neutral pH range was investigated. Not shaken batch experiments were conducted for 14 days mostly with 15 g/L of five different ZVI materials and 10 mM of selected ligands and 20 mg/l (0.084 mM) of an U(VI) solution. Apart from Cl- all tested ligands induced a decrease of U(VI) coprecipitation. This decrease is attributed to surface adsorption and complexation of the ligands to reactive sites on the surface of ZVI and their corrosion products. The extent of U(VI) removal decrease was not uniform for the five materials. Generally, groundwater with elevated EDTA concentration should not be remediated with the ZVI barrier technology. A rational selection of material can enable the selection of appropriated materials for any specific site with other tested ligands. The response of the system on pre-treating two ZVI materials with 250 mM HCl indicated that in situ generated corrosion products favor irreversible U(VI) uptake. Thus for the long term performance of ZVI barrier, iron dissolution should continue such that fresh iron oxide is always available for U(VI) co-precipitation."],["dc.identifier.doi","10.23689/fidgeo-1802"],["dc.identifier.fs","48794"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8986"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60641"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0236-5731"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Effects of selected ligands on U (VI) immobilization by zerovalent iron"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Fresenius Environmental Bulletin"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Nkundimana, Emmanuel"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Uwamariya, Valentine"],["dc.date.accessioned","2019-07-10T08:12:02Z"],["dc.date.available","2019-07-10T08:12:02Z"],["dc.date.issued","2015"],["dc.description.abstract","The premise of this research note is that current research on metallic iron (Fe0) for environmental remediation and water treatment has started on a biased basis. Before expecting experienced researchers to correct flawed approaches compromising the future of the technology, the attention of new researchers should be drawn on the prevailing flawed conceptual models. There are guides on how to select good research topics, to perform good literature review, to select good mentors, and to write good scientific papers. But critically reviewing the published material is part of the competence of any new researcher in a given field of research. This research note summarizes the most critical issues of research on Fe0 for water treatment as asks some key questions which would help research beginners to find their way."],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14057"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60848"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.rights.access","openAccess"],["dc.subject","Environmental remediation, Literature review, Peer review system, Water treatment, Zero-valent iron"],["dc.subject.ddc","550"],["dc.title","Metallic iron for water treatment and environmental remediation: A handout to young researchers"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","unknown"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","1739"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Cui, Xuesong"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Wu, Shuanghong"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-09T11:49:43Z"],["dc.date.available","2019-07-09T11:49:43Z"],["dc.date.issued","2018"],["dc.description.abstract","Elemental iron (Fe0) has been widely used in groundwater/soil remediation, safe drinking water provision, and wastewater treatment. It is still mostly reported that a surface-mediated reductive transformation (direct reduction) is a dominant decontamination mechanism. Thus, the expressions “contaminant removal” and “contaminant reduction” are interchangeably used in the literature for reducible species (contaminants). This contribution reviews the scientific literature leading to the advent of the Fe0 technology and shows clearly that reductive transformations in Fe0/H2O systems are mostly driven by secondary (FeII, H/H2) and tertiary/quaternary (e.g., Fe3O4, green rust) reducing agents. The incidence of this original mistake on the Fe0 technology and some consequences for its further development are discussed. It is shown, in particular, that characterizing the intrinsic reactivity of Fe0 materials should be the main focus of future research."],["dc.identifier.doi","10.3390/w10121739"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15749"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59613"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4441"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Fe0/H2O Systems for Environmental Remediation: The Scientific History and Future Research Directions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","419"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Water SA"],["dc.bibliographiccitation.lastpage","426"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-10T08:14:05Z"],["dc.date.available","2019-07-10T08:14:05Z"],["dc.date.issued","2011"],["dc.description.abstract","Chemical reduction has long dominated the thinking about the mechanism of aqueous contaminant removal in the presence of metallic iron (e.g. Fe0/H2O systems). However, a large body of experimental evidence indicates that chemical reduction is not adequate to explain satisfactorily the efficiency of Fe0/H2O systems for several substances or classes of substances. By contrast, the alternative approach, that contaminants are fundamentally adsorbed and co-precipitated by iron corrosion products seems to provide a better explanation of observed efficiency. The new approach is obviously not really understood. The present communication aims at clarifying this key issue. It seems that a paradigm shift is necessary for the further development of the iron technology."],["dc.identifier.fs","589749"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61427"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0378-4738"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Aqueous contaminant removal by metallic iron: Is the paradigm shifting?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Water Technology and Treatment Methods"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-09T11:45:37Z"],["dc.date.available","2019-07-09T11:45:37Z"],["dc.date.issued","2018"],["dc.description.abstract","The use of metallic iron (Fe0) for environmental remediation is applied industrially with a great degree of empiricism. Rules of thumb seem to be the only guide followed by the greater part of the Fe0 remediation community. The present communication demonstrates the validity of such a harsh statement and hopes that the research community will now follow the 10-year-old path concealing Fe0 remediation and mainstream science. A promising application is safe drinking water provision on a decentralized manner."],["dc.identifier.doi","10.31021/jwt.20181102"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15258"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59267"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2517-7427"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","550"],["dc.title","Metallic Iron (Fe0) Provide Possible Solution to Universal Safe Drinking Water Provision"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4304"],["dc.bibliographiccitation.issue","18"],["dc.bibliographiccitation.journal","Environmental Science & Technology"],["dc.bibliographiccitation.lastpage","4308"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Meinrath, G."],["dc.contributor.author","Dietrich, P."],["dc.contributor.author","Merkel, B. J."],["dc.date.accessioned","2019-07-09T11:53:32Z"],["dc.date.available","2019-07-09T11:53:32Z"],["dc.date.issued","2003"],["dc.description.abstract","Removal of uranium(VI) by zero-valent iron (ZVI) has been suggested as a feasible pathway to control uranium contaminations in seepage waters. Available information in literature however presents discrepant evidence on the process responsible for the mitigation effect. On basis of an EH-pH diagram of uranium and iron it is outlined that these discrepancies may be explained by the aqueous chemistry of uranium and iron. Additional effects contributing to the complexity of the system are given. Solubilization experiments using scrap iron together with water works sludge, MnO2 and pyrite indicate that U(VI) is immobilized by iron corrosion products after about 50 days."],["dc.identifier.doi","10.1021/es034296v"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7695"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60440"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0013-936X"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Mitigating Uranium in Ground Water: Prospects and Limitations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2632"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Fresenius Environmental Bulletin"],["dc.bibliographiccitation.lastpage","2637"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2019-07-10T08:14:05Z"],["dc.date.available","2019-07-10T08:14:05Z"],["dc.date.issued","2011"],["dc.description.abstract","A knowledge system (KS) is a knowledge that is unique to a given group of persons. This form of knowledge may have a local or natural origin and is linked to the community that has produced it. On the contrary, the core of mainstream science (MS) is the desire to profoundly understand processes, through sequential studies such as hypothesis formulation, experiment and prediction. Thus, KS is communitarian and MS is universal. KS can be understood and rendered universal through MS. In general, a process discovery (know-how) may be intuitive, accidental, conjectural or inspirational but outcomes should be predictable and repeatable as soon as the know-why is achieved by MS. This paper argues that the technology of using metallic iron for water treatment has all the characteristics of a KS and that promoters of this technology have deliberately rejected scientific arguments leading to the know-why of the fortuitous discovery. Consequently, the technology has developed into an impasse where controversial discoveries are reported on all relevant aspects. It is concluded that the integrity of science in endangered by this communitarian behaviour."],["dc.identifier.fs","589753"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61428"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1018-4619"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Metallic iron for water treatment: A knowledge system challenges mainstream science"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Merten, Dirk"],["dc.contributor.author","Heinrichs, Till"],["dc.contributor.author","Sonnefeld, Jürgen"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.editor","Merkel, B. J."],["dc.contributor.editor","Hasche-Berger, A."],["dc.date.accessioned","2010-09-13T07:51:49Z"],["dc.date.accessioned","2021-10-27T13:14:01Z"],["dc.date.available","2010-09-13T07:51:49Z"],["dc.date.available","2021-10-27T13:14:01Z"],["dc.date.issued","2006"],["dc.description.abstract","A 782 d solubilization study using not shaken batch experiments and involving one uranium-bearing rock and three natural carbonate minerals was conducted to characterize uranium (U) leaching under oxic conditions. Results showed that aqueous U concentration increased continuously with a solubilization rate of 0.16 mgm-2h-1 for the first 564 d (1.5 y). After 1.5 y, U concentration reached a maximum value (saturation) and decreased afterwards. The saturation concentration of 54 mgL-1 (mean value) was influenced to various extent by the presence of carbonate minerals. Dissolution/precipitation, adsorption or ion exchange processes appear to control U solubilization."],["dc.format.extent","425-435"],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1007/3-540-28367-6_42"],["dc.identifier.fs","48807"],["dc.identifier.ppn","587490810"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5057"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91825"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.publisher","Springer"],["dc.publisher.place","Berlin/Heidelberg"],["dc.relation.ispartof","Uranium in the Environment"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","550"],["dc.title","Characterizing uranium solubilization under natural near oxic conditions"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]