Lignin-derived carbon coated nanoscale zero-valent iron as a novel bifunctional material for efficient removal of Cr(VI) and organic pollutants

Magnetic amino-sulfonic dual sorbent for uranyl sorption from aqueous solutions – Influence of light irradiation on sorption properties

“…Though some metal ions (such as Cr(VI), [36]) have higher sensitivity to reduction phenomena, uranium(VI) can be reduced in soil through the action of sulfate-reducing bacteria, organic ligands [37] or iron-based minerals [38]; as one of the mechanisms involved in ore mineralization (geochemistry). Similar reducing mechanisms have been reported in the interpretation of uranyl binding onto zero-valent iron sorbents [13,39,40], which contribute to metal precipitation.…”

Sustainable and Green Synthesis of Iron Nanoparticles Supported on Natural Clays via Palm Waste Extract for Catalytic Oxidation of Crocein Orange G Mono Azoic Dye

“…The need for a sustainable and safe water is to develop innovative and economical methods for purification and treatment of wastewater. Diverse physical, chemical, biological, and electrochemical processes have been used to treat these pollutants from wastewater. − One of the main methods for removing these dyes is catalytic degradation. − Advanced oxidation processes (AOPs) are based on the use of radical transition species, such as (HO • ) with high reactivity and no selectivity. , A hydroxyl radical can change harmful pollutant matters into intermediate substances, which can further cause reactions with other oxidizing agents or these radicals and become mineralized as CO 2 , H 2 O, and other organic and inorganic minerals. , The Fenton process is one of the AOPs that is very efficient in degrading a wide range of azo dyes. − It is generally recognized that the homogeneous Fenton process has a number of drawbacks, including the need for additional treatments for sludge and iron ions, the acidity of effluents prior to decontamination, and the neutralization of treated solutions prior to disposal. − To address these issues, heterogeneous Fenton oxidation based on various Fe-based catalysts has been developed in the past few years. , …”