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Photocatalytic reduction of CR(VI) by PVA-alginate encapsulated γFe2O3 magnetic beads using different types of illumination lamp and light

Idris, Ani and Misran, Effaliza and Mohd. Yusof, Noordin (2012) Photocatalytic reduction of CR(VI) by PVA-alginate encapsulated γFe2O3 magnetic beads using different types of illumination lamp and light. Journal Of Industrial And Engineering Chemistry, 18 (6). pp. 2151-2156. ISSN 1226-086X

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Official URL: https://www.sciencedirect.com/science/article/pii/...

Abstract

In this study the toxic Cr(VI) which is a common pollutant to the environment is removed from the aqueous solution using the one step photocatalytic reduction to Cr(III) using PVA-alginate encapsulated γFe2O3 magnetic beads. The photocatalytic reduction of Cr(VI) by PVA-alginate encapsulated γFe2O3 magnetic beads was examined under sunlight and other 4 types of lamp: xenon lamp, black light bulb (BLB) lamp, light emitting diode (LED) lamp and fluorescent lamp. The experiments were performed at pH 1, initial Cr(VI) = 50 mg/L and the photocatalyst dosage of maghemite nanoparticles was kept at 8% (v/v). Removal of Cr(VI) was best under sunlight; 100% removal in 30 min, followed by xenon lamp; 100% removal in 100 min, BLB lamp; 70% removal in 100 min. LED and fluorescent lamp have about the same removal rate; 50% removal in 100 min. The Cr(VI) reduction using PVA-alginate magnetic beads fitted the Langmuir–Hinshelwood (L–H) kinetics model with a correlation coefficient (R2) of 0.972. The PVA-alginate magnetic beads were capable of treating industrial chromium waste containing 300 mg/L Cr(VI) within 2 h under sunlight.

Item Type:Article
Uncontrolled Keywords:PVA, Alginate, Photocatalytic process
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Chemical Engineering
ID Code:47377
Deposited By: Fazli Masari
Deposited On:22 Jun 2015 05:56
Last Modified:14 Oct 2018 08:21

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