Matches in SemOpenAlex for { <https://semopenalex.org/work/W2049272618> ?p ?o ?g. }
- W2049272618 endingPage "248" @default.
- W2049272618 startingPage "224" @default.
- W2049272618 abstract "Over the past 20 years, zero-valent iron (ZVI) has been extensively applied for the remediation/treatment of groundwater and wastewater contaminated with various organic and inorganic pollutants. Based on the intrinsic properties of ZVI and the reactions that occur in the process of contaminants sequestration by ZVI, this review summarizes the limitations of ZVI technology and the countermeasures developed in the past two decades (1994–2014). The major limitations of ZVI include low reactivity due to its intrinsic passive layer, narrow working pH, reactivity loss with time due to the precipitation of metal hydroxides and metal carbonates, low selectivity for the target contaminant especially under oxic conditions, limited efficacy for treatment of some refractory contaminants and passivity of ZVI arising from certain contaminants. The countermeasures can be divided into seven categories: pretreatment of pristine ZVI to remove passive layer, fabrication of nano-sized ZVI to increase the surface area, synthesis of ZVI-based bimetals taking advantage of the catalytic ability of the noble metal, employing physical methods to enhance the performance of ZVI, coupling ZVI with other adsorptive materials and chemically enhanced ZVI technology, as well as methods to recover the reactivity of aged ZVI. The key to improving the rate of contaminants removal by ZVI and broadening the applicable pH range is to enhance ZVI corrosion and to enhance the mass transfer of the reactants including oxygen and H+ to the ZVI surface. The characteristics of the ideal technology are proposed and the future research needs for ZVI technology are suggested accordingly." @default.
- W2049272618 created "2016-06-24" @default.
- W2049272618 creator A5003723259 @default.
- W2049272618 creator A5020257928 @default.
- W2049272618 creator A5022640967 @default.
- W2049272618 creator A5025299463 @default.
- W2049272618 creator A5060446843 @default.
- W2049272618 creator A5074672866 @default.
- W2049272618 creator A5081511718 @default.
- W2049272618 date "2015-05-01" @default.
- W2049272618 modified "2023-10-17" @default.
- W2049272618 title "The limitations of applying zero-valent iron technology in contaminants sequestration and the corresponding countermeasures: The development in zero-valent iron technology in the last two decades (1994–2014)" @default.
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