Development and Scale-up Production of a Novel Fibrous Catalyst and Application for Removal of Endocrine Disrupting Compounds
type: CreativeWork
description: Advanced oxidation processes based on Fenton’s chemistry have the potential to treat a wide range of organic pollutants. In this work, a novel catalyst underwent development for scale-up commercial production and tested for oxidative treatment of contaminants in water. In this work the existing modification process of polyacrylonitrile yarn to create the heterogeneous PAN catalyst has been optimised for the requirements of a scale-up of production in a dye bath type reactor. The concentration of sodium hydroxide, duration and temperature of alkaline treatment were optimised with respect to the physical properties of the yarn and presence of chelating functional groups. The quality of the catalyst produced after each modification was evaluated by monitoring functional groups present, total iron loading and strength of fixation. Treatment with 2.5% NaOH solution, at 60oC for 60 min resulted in a yarn similar properties to that produced using standard procedure. These conditions were appropriate for the reactor selected. The final step of production of the catalyst, i. e. introduction of Fe3+ cation to the fibre was optimised with respect to duration, composition of the impregnating solution and additional washing prior to the impregnation methodology. The solution of 6.2 g/L Fe2(SO4)3 / 14.8 g/L Na2SO4 (molar ratios of Fe3+ to co-salt anion 1:1.5) was found to be the best in terms of resultant iron loading on the yarn and the strength of iron fixation to the yarn. The highest iron loading on the yarn was found for the samples impregnated for 2 hours. Introduction of a new step of modification i. e. acidic wash after step 2 to remove entrapped NaOH did not result in better iron uptake or fixation strength to the yarn, it was therefore deemed unnecessary. Existing methods of removal of estrogenic compounds from wastewater were reviewed. The PAN catalyst produced using optimised procedure was successfully applied for removal of estrogenic compounds in the bench scale exp…
abstract: Advanced oxidation processes based on Fenton’s chemistry have the potential to treat a wide range of organic pollutants. In this work, a novel catalyst underwent development for scale-up commercial production and tested for oxidative treatment of contaminants in water. In this work the existing modification process of polyacrylonitrile yarn to create the heterogeneous PAN catalyst has been optimised for the requirements of a scale-up of production in a dye bath type reactor. The concentration of sodium hydroxide, duration and temperature of alkaline treatment were optimised with respect to the physical properties of the yarn and presence of chelating functional groups. The quality of the catalyst produced after each modification was evaluated by monitoring functional groups present, total iron loading and strength of fixation. Treatment with 2.5% NaOH solution, at 60oC for 60 min resulted in a yarn similar properties to that produced using standard procedure. These conditions were appropriate for the reactor selected. The final step of production of the catalyst, i. e. introduction of Fe3+ cation to the fibre was optimised with respect to duration, composition of the impregnating solution and additional washing prior to the impregnation methodology. The solution of 6.2 g/L Fe2(SO4)3 / 14.8 g/L Na2SO4 (molar ratios of Fe3+ to co-salt anion 1:1.5) was found to be the best in terms of resultant iron loading on the yarn and the strength of iron fixation to the yarn. The highest iron loading on the yarn was found for the samples impregnated for 2 hours. Introduction of a new step of modification i. e. acidic wash after step 2 to remove entrapped NaOH did not result in better iron uptake or fixation strength to the yarn, it was therefore deemed unnecessary. Existing methods of removal of estrogenic compounds from wastewater were reviewed. The PAN catalyst produced using optimised procedure was successfully applied for removal of estrogenic compounds in the bench scale exp…
author: Parnowska, Marta
license: https://dora.dmu.ac.uk/bitstreams/e649376a-00c9-43bd-8bdb-f282c3862b95/download
date published: 2011-04
date modified: 2026-07-24T06:18:33Z
provider: De Montfort University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: De Montfort University