Maleic Acid Oxidation Using A Heterogeneous Modified Polyacrylonitrile (PAN) Fibrous Catalyst

Abstract

The effectiveness, kinetics and mechanism of oxidation of maleic acid in solution using a novel modified polyacrylonitrile (PAN) catalyst/hydrogen peroxide system was studied. The modified PAN catalyst contains immobilised Fe

Pilot-Scale Removal of Trace Steroid Hormones and Pharmaceuticals and Personal Care Products from Municipal Wastewater Using a Heterogeneous Fenton’s Catalytic Process

“…This suggests that 30%-40% of organic compounds present in the wastewater were mineralised to produce CO 2 and water. Although TOC removal is somewhat low, the oxidation of these organic pollutants generally results in the formation of low molecular weight organic acids that are readily biodegradable [18] but which results in no change in TOC. It is has been widely reported that the oxidation of PPCP and steroid hormones by hydroxyl radicals results in loss of estrogenicity [14].…”

“…The heterogeneous polyacrylonitrile (PAN) catalyst/ H 2 O 2 has shown potential at lab scale in the treatment of synthetic organic contaminants [17][18][19]. This study aims to examine the effectives of the heterogeneous PAN catalyst/H 2 O 2 at a pilot scale, towards the removal of selected EDCs and PPCPs from pretreated (activated sludge treated) municipal wastewater.…”

Regeneration of a deactivated surface functionalised polyacrylonitrile supported Fenton catalyst for use in wastewater treatment

“…One of the materials successfully used is a surface functionalised nanocoated modied polyacrylonitrile (MPAN) bre in the form of a mesh. [3][4][5][6] The PAN mesh was modied to introduce surface functionalisation by amidoximation with a mixture of hydrazine and hydroxylamine at alkaline pH to allow surface complexation with iron(III) sulphate salt. 3,[7][8][9] This introduces groups such as amidoxime, amidrazone, amide and carboxylate onto the bres of the PAN mesh.…”

“…3,[7][8][9] This introduces groups such as amidoxime, amidrazone, amide and carboxylate onto the bres of the PAN mesh. 5 An Extended X-ray Absorption Fine Structure (EXAFS) study showed that the iron is surrounded by six atoms which are either O, or N or a mixture of both. When used with hydrogen peroxide at pH 3, the catalyst is seen to give excellent oxidation of organic pollutants in wastewater.…”

“…When used with hydrogen peroxide at pH 3, the catalyst is seen to give excellent oxidation of organic pollutants in wastewater. [3][4][5][6] The catalyst degrades pollutants via a heterogeneous Fentonlike mechanism (eqn (1) and (2)), which is known to be slightly slower in comparison to a homogenous Fenton's degradation. However, as the iron in this study is chelated to a PAN support, the amount of iron leaching and hence secondary pollution is reduced drastically.…”