Noubactep, Chicgoua

[["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.artnumber","429"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Pengou, Martin"],["dc.contributor.author","Rahman, Mohammad Azizur"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Nanseu-Njiki, Charles Péguy"],["dc.date.accessioned","2019-07-09T11:50:33Z"],["dc.date.available","2019-07-09T11:50:33Z"],["dc.date.issued","2019"],["dc.description.abstract","Inadequate access to safe drinking water is one of the most pervasive problems currently afflicting the developing world. Scientists and engineers are called to present affordable but efficient solutions, particularly applicable to small communities. Filtration systems based on metallic iron (Fe0) are discussed in the literature as one such viable solution, whether as a stand-alone system or as a complement to slow sand filters (SSFs). Fe0 filters can also be improved by incorporating biochar to form Fe0-biochar filtration systems with potentially higher contaminant removal efficiencies than those based on Fe0 or biochar alone. These three low-cost and chemical-free systems (Fe0, biochar, SSFs) have the potential to provide universal access to safe drinking water. However, a well-structured systematic research is needed to design robust and efficient water treatment systems based on these affordable filter materials. This communication highlights the technology being developed to use Fe0-based systems for decentralized safe drinking water provision. Future research directions for the design of the next generation Fe0-based systems are highlighted. It is shown that Fe0 enhances the efficiency of SSFs, while biochar has the potential to alleviate the loss of porosity and uncertainties arising from the non-linear kinetics of iron corrosion. Fe0-based systems are an affordable and applicable technology for small communities in low-income countries, which could contribute to attaining self-reliance in clean water supply and universal public health."],["dc.identifier.doi","10.3390/w11030429"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15964"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59797"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4441"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","550"],["dc.title","Fe0/H2O Filtration Systems for Decentralized Safe Drinking Water: Where to from Here?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","591"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Water"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Lufingo, Mesia"],["dc.contributor.author","Hu, Rui"],["dc.contributor.author","Gwenzi, Willis"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Njau, Karoli N."],["dc.contributor.author","Ndé-Tchoupé, Arnaud Igor"],["dc.contributor.author","Ntwampe, Seteno Karabo Obed"],["dc.date.accessioned","2019-07-09T11:45:28Z"],["dc.date.available","2019-07-09T11:45:28Z"],["dc.date.issued","2018"],["dc.description.abstract","Efficient but affordable water treatment technologies are currently sought to solve the prevalent shortage of safe drinking water. Adsorption-based technologies are in the front-line of these efforts. Upon proper design, universally applied materials (e.g., activated carbons, bone chars, metal oxides) are able to quantitatively remove inorganic and organic pollutants as well as pathogens from water. Each water filter has a defined removal capacity and must be replaced when this capacity is exhausted. Operational experience has shown that it may be difficult to convince some low-skilled users to buy new filters after a predicted service life. This communication describes the quest to develop a filter-clock to encourage all users to change their filters after the designed service life. A brief discussion on such a filter-clock based on rusting of metallic iron (Fe0) is presented. Integrating such filter-clocks in the design of water filters is regarded as essential for safeguarding public health."],["dc.identifier.doi","10.3390/w10050591"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15224"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59238"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4441"],["dc.relation.issn","2073-4441"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","550"],["dc.title","Avoiding the Use of Exhausted Drinking Water Filters: A Filter-Clock Based on Rusting Iron"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]