Effect of polyurethane structure on arsenic adsorption capacity in nanofibrous polymer/ferrous sulphate-based systems

Abstract

Polyurethane-based nanofibrous structures can be used as adsorbents for arsenic in water. Their adsorption capacity can be significantly increased by doping the structure with ferrous sulphate.

Characteristics and application of iron-based materials in heterogeneous Fenton oxidation for wastewater treatment: a review

“…Compared to MIL-100(Fe) and Fe 2 O 3 , FeII@MIL-100(Fe) has greatly enhanced surface Fe 2+ /Fe 3+ synergy between FeII@MIL-100(Fe) and Fe 2 O 3 , which resulted in the greatly enhanced ˙OH production, surface redox and surface reaction. Moreover, FeII@MIL-100(Fe) maintains its catalytic ability in a wide pH range (3)(4)(5)(6)(7)(8), and only a small amount of iron leaches out even in acidic environments. To facilitate the recovery and improve the visible light collection efficiency, Jin et al 245 synthesized nanosheet-assembled MIL-88B(Fe) and magnetic nanoparticles by a single-point solvothermal process.…”

“…A variety of water treatment modalities have been developed to remove contaminants, including organic acids, nitrates, phosphates, and heavy metals. For example, coagulation, 5 membrane separation 6 and adsorption 7 are only suitable for small-scale remediation, while biodegradation 8 is suitable not only for small-scale remediation but also for large-scale remediation. However, the low removal efficiency, high cost, time consumption and high sludge yield of these technologies are only suitable for small-scale remediation and they produce toxic by-products, limiting their large-scale application.…”

Enhanced remediation of As(iii) and As(v) by new zirconium-loaded attapulgite and its mechanisms in the aquatic environment

“…In order to alleviate the harm of As pollution in waters, many As removal technologies have been put into practice to lower the level of As in waters. 8,9 In particular, adsorption is considered as an ideal method as it can directly remove As from water at a lower cost and is more applicable and feasible than other treatments. 10,11 To date, numerous adsorbents, such as iron oxides/hydroxides, 12,13 calcium oxides/hydroxides, 14 aluminum oxides/hydroxides, 15 biochar, 16 activated char, 17 and modified clay minerals, 18 have been produced for As remediation in waters.…”