Synthesis of Poly(APP-co-EGDMA) Particles Using Monomers Derived from Cashew Nut Shell Liquid for the Removal of Cr(III) from Aqueous Solutions

Abstract

This work was aimed at synthesizing Cashew Nut Shell Liquid (CNSL) based polymer particles for adsorption of Cr(III) ions from aqueous solutions. Natural CNSL was used as a starting material in synthesizing amino pentadecylphenols (APP). This was achieved through isolating anacardic acid from the CNSL via calcium anacardate procedure, followed by hydrogenation of the alkenyl side chains, and subsequently decarboxylating the product to form 3-pentadecylphenol, which was then nitrated and reduced to a mixture of APP. APP were co-polymerized with ethylene glycol dimethacrylate (EGDMA) to form poly(APP-co-EGDMA) particles. The chemical structures of the synthesized compounds were confirmed by Fourier Transform IR and 1H-NMR. The co-polymer particles were characterized by Scanning Electron Microscopy (SEM) to establish their morphological properties. The prepared co-polymer particles were found to have-NH loading of 46 mmol/g and a maximum adsorption capacity for Cr(III) ions of 16 mg per g of dry polymer particles. The spent polymer particles were recoverable and reusable.

Corrosion Inhibition of Amino Pentadecylphenols (APPs) Derived from Cashew Nut Shell Liquid on Mild Steel in Acidic Medium

“…5-pentadecyl-2,4-diaminophenol and 3-pentadecyl-2,4,6-triaminophenol synthesized as reported somewhere else [6].…”

“…In an effort to synthesize poly(APP-co-EGDMA) [6], we recently reported modification of Cashw Nut Shell Liquid (CNSL) to form a mixture of amino pentadecylphenols (APPs), i.e. 5-pentadecyl-2,4-diaminophenol and 3-pentadecyl-2,4,6-triaminophenol.…”

Biosorption of cadmium by a lipid extraction residue of lipid-rich microalgae

“…29,30 The extremely high correlation coefficients of the linearized Langmuir model suggested that possibly the predominant sorption step in this sorption process is a single surface reaction with constant activation energy. 31 For the Langmuir models, the maximal biosorption capacity of adsorbent (q max ) is a crucial indicator of the adsorption characteristic of algal adsorbent. The residue of PTE-15 had the highest Cd 2+ adsorption capacity of 36.101 mg g À1 , which can be used as an effective biosorbent for the removal of Cd.…”