Carbon-cryogel hierarchical composites as effective and scalable filters for removal of trace organic pollutants from water.

Autor: Busquets R; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK; MAST Carbon International Ltd. Jays Close, Basingstoke, Hampshire RG22 4BA, UK; Kingston University, Faculty of Science, Engineering and Computing, Kingston Upon Thames, KT1 2EE, UK. Electronic address: R.Busquets@Kingston.ac.uk., Ivanov AE; Protista Biotechnology AB, Kvarngatan 2, P.O. Box 86, SE-267 22 Bjuv, Sweden., Mbundi L; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK; Blond McIndoe Research Foundation, Queen Victoria Hospital, Holtye Road, East Grinstead, RH19 3DZ, UK., Hörberg S; Protista Biotechnology AB, Kvarngatan 2, P.O. Box 86, SE-267 22 Bjuv, Sweden., Kozynchenko OP; MAST Carbon International Ltd. Jays Close, Basingstoke, Hampshire RG22 4BA, UK., Cragg PJ; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK., Savina IN; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK., Whitby RLD; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK; Nazarbayev University, School of Engineering, 53, Kabanbay Batyr Ave., Astana, 010000, Kazakhstan., Mikhalovsky SV; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK; Nazarbayev University, School of Engineering, 53, Kabanbay Batyr Ave., Astana, 010000, Kazakhstan., Tennison SR; MAST Carbon International Ltd. Jays Close, Basingstoke, Hampshire RG22 4BA, UK., Jungvid H; Protista Biotechnology AB, Kvarngatan 2, P.O. Box 86, SE-267 22 Bjuv, Sweden., Cundy AB; University of Brighton, Faculty of Science and Engineering, BN2 4GJ, UK; University of Southampton, School of Ocean and Earth Science, Southampton, SO14 3ZH, UK. Electronic address: A.Cundy@soton.ac.uk.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2016 Nov 01; Vol. 182, pp. 141-148. Date of Electronic Publication: 2016 Jul 26.
DOI: 10.1016/j.jenvman.2016.07.061
Abstrakt: Effective technologies are required to remove organic micropollutants from large fluid volumes to overcome present and future challenges in water and effluent treatment. A novel hierarchical composite filter material for rapid and effective removal of polar organic contaminants from water was developed. The composite is fabricated from phenolic resin-derived carbon microbeads with controllable porous structure and specific surface area embedded in a monolithic, flow permeable, poly(vinyl alcohol) cryogel. The bead-embedded monolithic composite filter retains the bulk of the high adsorptive capacity of the carbon microbeads while improving pore diffusion rates of organic pollutants. Water spiked with organic contaminants, both at environmentally relevant concentrations and at high levels of contamination, was used to determine the purification limits of the filter. Flow through tests using water spiked with the pesticides atrazine (32 mg/L) and malathion (16 mg/L) indicated maximum adsorptive capacities of 641 and 591 mg pollutant/g carbon, respectively. Over 400 bed volumes of water contaminated with 32 mg atrazine/L, and over 27,400 bed volumes of water contaminated with 2 μg atrazine/L, were treated before pesticide guideline values of 0.1 μg/L were exceeded. High adsorptive capacity was maintained when using water with high total organic carbon (TOC) levels and high salinity. The toxicity of water filtrates was tested in vitro with human epithelial cells with no evidence of cytotoxicity after initial washing.
(Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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