Noubactep, Chicgoua

[["dc.bibliographiccitation.firstpage","3177"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Nya, Esther Laurentine"],["dc.contributor.author","Feumba, Roger"],["dc.contributor.author","Fotsing Kwetché, Pierre René"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.editor","Langergraber, Günter"],["dc.date.accessioned","2022-01-11T14:07:55Z"],["dc.date.available","2022-01-11T14:07:55Z"],["dc.date.issued","2021"],["dc.description.abstract","Providing everyone with safe drinking water is a moral imperative. Yet, sub-Saharan Africa seems unable to achieve “safe drinking water for all” by 2030. This sad situation calls for a closer examination of the water supply options for both rural and urban populations. Commonly, two main aspects are considered: (1) behavioural responses to available or potential water supply options, and (2) socio-economic acceptability. These aspects determine the feasibility and the affordability of bringing safe drinking water as a basic good and human right to everyone. There is a broad consensus that achieving the UN Sustainable Development Goal 6.1 is mostly a financial issue, especially in low-income settings. This communication challenges this view as water is available everywhere and affordable treatment options are well-known. It considers the decentralized water supply model as a reference or standard approach in low-income settings rather than as an alternative. Here, the medium-sized city of Bangangté in the western region of Cameroon is used to demonstrate that universal safe drinking water will soon be possible. In fact, during the colonial period, the residences of the elite and the main institutions, including the administrative quarter, churches, and hospital, have been supplied with clean water from various local sources. All that is needed is to consider everyone as important or accept safe drinking water as human right. First, we present a historical background on water supply in the colonial period up to 1980. Second, the drinking water supply systems and water demand driven by population growth are discussed. Finally, a hybrid model for the achieving of universal access to clean drinking water, and preconditions for its successful implementation, are presented. Overall, this communication calls for a shift from safe drinking water supply approaches dominated by centralized systems, and presents a transferable hybrid model to achieve universal clean drinking water."],["dc.description.abstract","Providing everyone with safe drinking water is a moral imperative. Yet, sub-Saharan Africa seems unable to achieve “safe drinking water for all” by 2030. This sad situation calls for a closer examination of the water supply options for both rural and urban populations. Commonly, two main aspects are considered: (1) behavioural responses to available or potential water supply options, and (2) socio-economic acceptability. These aspects determine the feasibility and the affordability of bringing safe drinking water as a basic good and human right to everyone. There is a broad consensus that achieving the UN Sustainable Development Goal 6.1 is mostly a financial issue, especially in low-income settings. This communication challenges this view as water is available everywhere and affordable treatment options are well-known. It considers the decentralized water supply model as a reference or standard approach in low-income settings rather than as an alternative. Here, the medium-sized city of Bangangté in the western region of Cameroon is used to demonstrate that universal safe drinking water will soon be possible. In fact, during the colonial period, the residences of the elite and the main institutions, including the administrative quarter, churches, and hospital, have been supplied with clean water from various local sources. All that is needed is to consider everyone as important or accept safe drinking water as human right. First, we present a historical background on water supply in the colonial period up to 1980. Second, the drinking water supply systems and water demand driven by population growth are discussed. Finally, a hybrid model for the achieving of universal access to clean drinking water, and preconditions for its successful implementation, are presented. Overall, this communication calls for a shift from safe drinking water supply approaches dominated by centralized systems, and presents a transferable hybrid model to achieve universal clean drinking water."],["dc.identifier.doi","10.3390/w13223177"],["dc.identifier.pii","w13223177"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/97893"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-507"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4441"],["dc.rights","Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)."],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","A Hybrid Model for Achieving Universal Safe Drinking Water in the Medium-Sized City of Bangangté (Cameroon)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2085"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Pembe-Ali, Zuleikha"],["dc.contributor.author","Mwamila, Tulinave Burton"],["dc.contributor.author","Lufingo, Mesia"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Marwa, Janeth"],["dc.contributor.author","Rwiza, Mwemezi J."],["dc.contributor.author","Lugodisha, Innocent"],["dc.contributor.author","Qi, Qinwen"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2021-09-01T06:43:01Z"],["dc.date.available","2021-09-01T06:43:01Z"],["dc.date.issued","2021"],["dc.description.abstract","There is escalating salinity levels on small islands due to uncontrolled groundwater extraction. Conventionally, this challenge is addressed by adopting optimal groundwater pumping strategies. Currently, on Unguja Island (Zanzibar), urban freshwater is supplied by desalination, which is expensive and energy-intensive. Hence, desalinization cannot be afforded by rural communities. This study demonstrates that the innovative Kilimanjaro Concept (KC), based on rainwater harvesting (RWH) can remediate seawater intrusion in Unguja, while enabling a universal safe drinking water supply. The reasoning is rooted in the water balance of the whole island. It is shown that if rainwater is systematically harvested, quantitatively stored, and partly infiltrated, seawater intrusion will be reversed, and a universal safe drinking water supply will be secured. Water treatment with affordable technologies (e.g., filtration and adsorption) is suggested. The universality of KC and its suitability for small islands is demonstrated. Future research should focus on pilot testing of this concept on Unguja Island and other island nations."],["dc.description.abstract","There is escalating salinity levels on small islands due to uncontrolled groundwater extraction. Conventionally, this challenge is addressed by adopting optimal groundwater pumping strategies. Currently, on Unguja Island (Zanzibar), urban freshwater is supplied by desalination, which is expensive and energy-intensive. Hence, desalinization cannot be afforded by rural communities. This study demonstrates that the innovative Kilimanjaro Concept (KC), based on rainwater harvesting (RWH) can remediate seawater intrusion in Unguja, while enabling a universal safe drinking water supply. The reasoning is rooted in the water balance of the whole island. It is shown that if rainwater is systematically harvested, quantitatively stored, and partly infiltrated, seawater intrusion will be reversed, and a universal safe drinking water supply will be secured. Water treatment with affordable technologies (e.g., filtration and adsorption) is suggested. The universality of KC and its suitability for small islands is demonstrated. Future research should focus on pilot testing of this concept on Unguja Island and other island nations."],["dc.identifier.doi","10.3390/w13152085"],["dc.identifier.pii","w13152085"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89201"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-455"],["dc.relation.eissn","2073-4441"],["dc.title","Application of the Kilimanjaro Concept in Reversing Seawater Intrusion and Securing Water Supply in Zanzibar, Tanzania"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","8338"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Sustainability"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Huang, Zhe"],["dc.contributor.author","Nya, Esther Laurentine"],["dc.contributor.author","Rahman, Mohammad Azizur"],["dc.contributor.author","Mwamila, Tulinave Burton"],["dc.contributor.author","Cao, Viet"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2021-09-01T06:43:02Z"],["dc.date.available","2021-09-01T06:43:02Z"],["dc.date.issued","2021"],["dc.description.abstract","Rainwater harvesting (RWH) is generally perceived as a promising cost-effective alternative water resource for potable and non-potable uses (water augmentation) and for reducing flood risks. The performance of RWH systems has been evaluated for various purposes over the past few decades. These systems certainly provide economic, environmental, and technological benefits of water uses. However, regarding RWH just as an effective alternative water supply to deal with the water scarcity is a mistake. The present communication advocates for a systematic RWH and partial infiltration wherever and whenever rain falls. By doing so, the detrimental effects of flooding are reduced, groundwater is recharged, water for agriculture and livestock is stored, and conventional water sources are saved. In other words, RWH should be at the heart of water management worldwide. The realization of this goal is easy even under low-resource situations, as infiltration pits and small dams can be constructed with local skills and materials."],["dc.description.abstract","Rainwater harvesting (RWH) is generally perceived as a promising cost-effective alternative water resource for potable and non-potable uses (water augmentation) and for reducing flood risks. The performance of RWH systems has been evaluated for various purposes over the past few decades. These systems certainly provide economic, environmental, and technological benefits of water uses. However, regarding RWH just as an effective alternative water supply to deal with the water scarcity is a mistake. The present communication advocates for a systematic RWH and partial infiltration wherever and whenever rain falls. By doing so, the detrimental effects of flooding are reduced, groundwater is recharged, water for agriculture and livestock is stored, and conventional water sources are saved. In other words, RWH should be at the heart of water management worldwide. The realization of this goal is easy even under low-resource situations, as infiltration pits and small dams can be constructed with local skills and materials."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.3390/su13158338"],["dc.identifier.pii","su13158338"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89204"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-455"],["dc.relation.eissn","2071-1050"],["dc.relation.orgunit","Abteilung Angewandte Geologie"],["dc.rights","CC BY 4.0"],["dc.title","Integrated Water Resource Management: Rethinking the Contribution of Rainwater Harvesting"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","409"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Processes"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Xiao, Minhui"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Cui, Xuesong"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2020-05-06T12:01:50Z"],["dc.date.available","2020-05-06T12:01:50Z"],["dc.date.issued","2020"],["dc.description.abstract","The general suitability of water treatment systems involving metallic iron (Fe0) is well-established. Various attempts have been made to improve the efficiency of conventional Fe0 systems. One promising approach combines granular Fe0 and an iron sulfide mineral to form Fe0/Fe-sulfide/H2O systems. An improved understanding of the fundamental principles by which such systems operate is still needed. Through a systematic analysis of possible reactions and the probability of their occurrence, this study establishes that sulfide minerals primarily sustain iron corrosion by lowering the pH of the system. Thus, chemical reduction mediated by FeII species (indirect reduction) is a plausible explanation for the documented reductive transformations. Such a mechanism is consistent with the nature and distribution of reported reaction products. While considering the mass balance of iron, it appears that lowering the pH value increases Fe0 dissolution, and thus subsequent precipitation of hydroxides. This precipitation reaction is coupled with the occlusion of contaminants (co-precipitation or irreversible adsorption). The extent to which individual sulfides impact the efficiency of the tested systems depends on their intrinsic reactivities and the operational conditions (e.g., sulfide dosage, particle size, experimental duration). Future research directions, including the extension of Fe0/Fe-sulfide/H2O systems to drinking water filters and (domestic) wastewater treatment using the multi-soil-layering method are highlighted."],["dc.description.sponsorship","Ministry of Science and Technology of China"],["dc.identifier.doi","10.3390/pr8040409"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17382"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64900"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2227-9717"],["dc.relation.issn","2227-9717"],["dc.rights","CC BY 4.0"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Understanding the Operating Mode of Fe0/Fe-Sulfide/H2O Systems for Water Treatment"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","S0045653521033853"],["dc.bibliographiccitation.firstpage","132913"],["dc.bibliographiccitation.journal","Chemosphere"],["dc.bibliographiccitation.volume","291"],["dc.contributor.author","Konadu-Amoah, Bernard"],["dc.contributor.author","Ndé-Tchoupé, Arnaud Igor"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2022-04-01T10:00:59Z"],["dc.date.available","2022-04-01T10:00:59Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1016/j.chemosphere.2021.132913"],["dc.identifier.pii","S0045653521033853"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105568"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.issn","0045-6535"],["dc.rights.uri","https://www.elsevier.com/tdm/userlicense/1.0/"],["dc.title","Investigating the Fe0/H2O systems using the methylene blue method: Validity, applications, and future directions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","12069"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Cao, Viet"],["dc.contributor.author","Alyoussef, Ghinwa"],["dc.contributor.author","Gatcha-Bandjun, Nadège"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2021-08-12T07:45:00Z"],["dc.date.available","2021-08-12T07:45:00Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Metallic iron (Fe 0 ) has shown outstanding performances for water decontamination and its efficiency has been improved by the presence of sand (Fe 0 /sand) and manganese oxide (Fe 0 /MnO x ). In this study, a ternary Fe 0 /MnO x /sand system is characterized for its discoloration efficiency of methylene blue (MB) in quiescent batch studies for 7, 18, 25 and 47 days. The objective was to understand the fundamental mechanisms of water treatment in Fe 0 /H 2 O systems using MB as an operational tracer of reactivity. The premise was that, in the short term, both MnO 2 and sand delay MB discoloration by avoiding the availability of free iron corrosion products (FeCPs). Results clearly demonstrate no monotonous increase in MB discoloration with increasing contact time. As a rule, the extent of MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the vessels (test-tubes). The presence of MnO x and sand enabled the long-term generation of iron hydroxides for MB discoloration by adsorption and co-precipitation. Results clearly reveal the complexity of the Fe 0 /MnO x /sand system, while establishing that both MnO x and sand improve the efficiency of Fe 0 /H 2 O systems in the long-term. This study establishes the mechanisms of the promotion of water decontamination by amending Fe 0 -based systems with reactive MnO x ."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.1038/s41598-021-91475-x"],["dc.identifier.pii","91475"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/88350"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-448"],["dc.relation.eissn","2045-2322"],["dc.rights","CC BY 4.0"],["dc.title","The key role of contact time in elucidating the mechanisms of enhanced decontamination by Fe0/MnO2/sand systems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5606"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","Sustainability"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Qi, Qinwen"],["dc.contributor.author","Marwa, Janeth"],["dc.contributor.author","Mwamila, Tulinave"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2020-05-06T12:02:21Z"],["dc.date.available","2020-05-06T12:02:21Z"],["dc.date.issued","2019"],["dc.description.abstract","Rainwater is conventionally perceived as an alternative drinking water source, mostly needed to meet water demand under particular circumstances, including under semi-arid conditions and on small islands. More recently, rainwater has been identified as a potential source of clean drinking water in cases where groundwater sources contain high concentrations of toxic geogenic contaminants. Specifically, this approach motivated the introduction of the Kilimanjaro Concept (KC) to supply fluoride-free water to the population of the East African Rift Valley (EARV). Clean harvested rainwater can either be used directly as a source of drinking water or blended with polluted natural water to meet drinking water guidelines. Current efforts towards the implementation of the KC in the EARV are demonstrating that harvesting rainwater is a potential universal solution to cover ever-increasing water demands while limiting adverse environmental impacts such as groundwater depletion and flooding. Indeed, all surface and subsurface water resources are replenished by precipitation (dew, hail, rain, and snow), with rainfall being the main source and major component of the hydrological cycle. Thus, rainwater harvesting systems entailing carefully harvesting, storing, and transporting rainwater are suitable solutions for water supply as long as rain falls on earth. Besides its direct use, rainwater can be infiltrating into the subsurface when and where it falls, thereby increasing aquifer recharge while minimizing soil erosion and limiting floods. The present paper presents an extension of the original KC by incorporating Chinese experience to demonstrate the universal applicability of the KC for water management, including the provision of clean water for decentralized communities."],["dc.identifier.doi","10.3390/su11205606"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16508"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64904"],["dc.identifier.url","https://www.mdpi.com/2071-1050/11/20/5606"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2071-1050"],["dc.relation.issn","2071-1050"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Making Rainwater Harvesting a Key Solution for Water Management: The Universality of the Kilimanjaro Concept"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1492"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","14"],["dc.contributor.affiliation","Xiao, Minhui; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; xiaominhui@hhu.edu.cn (M.X.); rhu@hhu.edu.cn (R.H.); ndetchoupe@gmail.com (A.I.N.-T.)"],["dc.contributor.affiliation","Hu, Rui; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; xiaominhui@hhu.edu.cn (M.X.); rhu@hhu.edu.cn (R.H.); ndetchoupe@gmail.com (A.I.N.-T.)"],["dc.contributor.affiliation","Ndé-Tchoupé, Arnaud Igor; 1School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China; xiaominhui@hhu.edu.cn (M.X.); rhu@hhu.edu.cn (R.H.); ndetchoupe@gmail.com (A.I.N.-T.)"],["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; xiaominhui@hhu.edu.cn (M.X.); rhu@hhu.edu.cn (R.H.); ndetchoupe@gmail.com (A.I.N.-T.)"],["dc.contributor.author","Xiao, Minhui"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Ndé-Tchoupé, Arnaud Igor"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2022-06-01T09:40:01Z"],["dc.date.available","2022-06-01T09:40:01Z"],["dc.date.issued","2022"],["dc.date.updated","2022-06-06T00:24:18Z"],["dc.description.abstract","Scientific collaboration among various geographically scattered research groups on the broad topic of “metallic iron (Fe0) for water remediation” has evolved greatly over the past three decades. This collaboration has involved different kinds of research partners, including researchers from the same organization and domestic researchers from non-academic organizations as well as international partners. The present analysis of recent publications by some leading scientists shows that after a decade of frank collaboration in search of ways to improve the efficiency of Fe0/H2O systems, the research community has divided itself into two schools of thought since about 2007. Since then, progress in knowledge has stagnated. The first school maintains that Fe0 is a reducing agent for some relevant contaminants. The second school argues that Fe0 in-situ generates flocculants (iron hydroxides) for contaminant scavenging and reducing species (e.g., FeII, H2, and Fe3O4), but reductive transformation is not a relevant contaminant removal mechanism. The problem encountered in assessing the validity of the views of both schools arises from the quantitative dominance of the supporters of the first school, who mostly ignore the second school in their presentations. The net result is that the various derivations of the original Fe0 remediation technology may be collectively flawed by the same mistake. While recognizing that the whole research community strives for the success of a very promising but unestablished technology, annual review articles are suggested as an ingredient for successful collaboration."],["dc.description.sponsorship","Ministry of Science and Technology of China"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.3390/w14091492"],["dc.identifier.pii","w14091492"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108619"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-572"],["dc.relation.eissn","2073-4441"],["dc.rights","CC BY 4.0"],["dc.title","Metallic Iron for Water Remediation: Plenty of Room for Collaboration and Convergence to Advance the Science"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["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","548"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Processes"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Cao, Viet"],["dc.contributor.author","Alyoussef, Ghinwa"],["dc.contributor.author","Gatcha-Bandjun, Nadège"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.date.accessioned","2021-06-01T09:42:41Z"],["dc.date.available","2021-06-01T09:42:41Z"],["dc.date.issued","2021"],["dc.description.abstract","The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One of the most promising approaches is the amendment with manganese dioxide (Fe0/MnO2 system). The resulting system is a very complex one where characterization is challenging. The present communication uses methylene blue discoloration (MB method) to characterize the Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. The initial MB concentration was 10 mg L−1 with the following mass loading: [MnO2] = 2.3 g L−1, [sand] = 45 g L−1, and 0 < [Fe0] (g L−1) ≤ 45. The following systems where investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, and Fe0/MnO2/sand. Results demonstrated that MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the test-tubes. Results confirm the complexity of the Fe0/MnO2/sand system, while establishing that both MnO2 and sand improve the efficiency of Fe0/H2O systems in the long-term. The mechanisms of water decontamination by amending Fe0-based systems with MnO2 is demonstrated by the MB method."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.3390/pr9030548"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85321"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.publisher","MDPI"],["dc.relation.eissn","2227-9717"],["dc.relation.orgunit","Abteilung Angewandte Geologie"],["dc.rights","CC BY 4.0"],["dc.title","The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]