Nanocomposite functionalized membranes based on silica nanoparticles cross-linked to electrospun nanofibrous support for arsenic(v) adsorption from contaminated underground water

Abstract

Development of nanocomposite functionalized membranes for the removal of As(v) from contaminated water.

Recent advances in heavy metal/metalloid ion treatment from wastewater using nanocomposites and bionanocomposites

“…Although activated carbon is one of the most commonly used adsorbents for pollutant removal, it is expensive. Al-Ghouti et al (2019) prepared silane-and sulfurmodified roasted date pits and applied these for Hg 2+ removal from water. It was observed that Ag NPs uniformly doped in ordered mesoporous silica can reduce Hg 2+ to Hg, which ultimately reacts with Ag present in the NC, followed by alloy formation (Ganzagh et al, 2016).…”

Synthesis of microporous nano-composite (hollow spheres) for fast detection and removal of As(V) from contaminated water

“…They can be also used as pre-concentration steps in analytical processes [25]. Different adsorbents such as metal oxides, activated carbons, resins, impregnated resins [26], metal-organic frameworks (MOFs) [27], nanocomposites and biosorbents have been reported for As removal [11,[28][29][30][31][32][33][34]. Cellulose support modified with grafting of amine groups has been used for the binding of copper and the metal-loaded sorbent was efficiently used for As(V) recovery [35][36][37][38].…”

Nanoscale iron (oxyhydr)oxide-modified carbon nanotube filter for rapid and effective Sb(iii) removal

“…Generally, the edge energy increases with an increase in the oxidation state. 29 Comparing the Sb XANES spectra of the Sb(III)-loaded lter with those of the reference compounds (i.e., KSb(OH) 6 and C 8 H 4 K 2 O 12 Sb 2 were used as references for Sb(V) and Sb(III), respectively), indicated that Sb was present in the valence states of Sb(V) and Sb(III). Fig.…”

“…4,5 As a metalloid element, Sb is located in group 15 (VA) of the periodic table, structurally analogous to arsenic, but much less attention has been given to Sb removal when compared with arsenic. 6,7 Generally, the most common aqueous Sb species are inorganic Sb(OH) 6À and Sb(OH) 3 , 8 and Sb(III) is 10 times more toxic than Sb(V). Because of its negative impact on human life, the World Health Organization has set the permissible amount of total Sb in drinking water at 5 mg L À1 .…”