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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20380
Title: Mechanistic insight into heterogeneous Fenton-like catalysis with M-Al2O3/SiO2(M = Fe, Co and Ni) for acrylonitrile mineralization from real ABS resin wastewater: Optimization and toxicity assessment
Authors: Kumar A.
Prasad, Basheshwar Rajendra
Sandhwar V.K.
Garg K.K.
Published in: Journal of Environmental Chemical Engineering
Abstract: In this study, a novel heterogeneous catalyst M-Al2O3/SiO2 (M = Fe, Co and Ni) metal incorporate fly ash was synthesized via wet impregnation method and then evaluated the performance during treatment of acrylonitrile butadiene styrene (ABS) resin wastewater. Synthesized catalyst was characterized by several analytical techniques i.e., FTIR, XRD, BET, TEM, FE-SEM, XPS, EPR and IC-PMS techniques. Response surface methodology (RSM) based central composite design (CCD) was used to optimized the operating parameters within their ranges e.g., oxidant dose (H2O2) 5-25 mM, catalyst dose 300-1500 mg/L, pH 2.5-10.5 and reaction temperature 30-70 °C and their influences on acrylonitrile and COD removal were observed. In particular, enhanced removal of acrylonitrile (95.62%) and COD (88.95%) were obtained under the optimal conditions from RSM techniques. In order to evaluated the toxicity of resin wastewater, phytotoxicity study was carried out on various species as Vigna radiatus L., Cicer arietinum and Hordeum vulgare L. etc. Acrylonitrile and COD degradation kinetics were performed by two-step degradation and well fitted by first order kinetic model at different temperatures. The degradation pathways of acrylonitrile were elucidated by temporal evolution of intermediates and final products detected by GC-MS analysis along with reactive oxygen species (ROS) scavenger study. Over the four cycle experiments only 14.93% of acrylonitrile and 18.78% of COD removal efficiency were inhibited with and very low metal leaching. The overall operating cost of treatment process was estimated as 50.72$/m3 of ABS resin wastewater. © 2021 Elsevier Ltd.
Citation: Journal of Environmental Chemical Engineering, 9(3)
URI: https://doi.org/10.1016/j.jece.2021.105177
http://repository.iitr.ac.in/handle/123456789/20380
Issue Date: 2021
Publisher: Elsevier Ltd
Keywords: Degradation kinetics
Heterogeneous catalysis
Optimization
Phytotoxicity
Scavenger
ISSN: 22133437
Author Scopus IDs: 57215268677
15838004000
57193263981
56112049800
Author Affiliations: Kumar, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Prasad, B., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Sandhwar, V.K., Department of Chemical Engineering, Parul Institute of Technology, Parul University, Vadodara, Gujarat, 391760, India
Garg, K.K., Ministry of Environmental, Forest and Climate Change, Government of India, Integrated Regional Office, Chandigarh, 160030, India
Corresponding Author: Kumar, A.; Department of Chemical Engineering, India; email: akumar6@ch.iitr.ac.in
Appears in Collections:Journal Publications [CH]

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