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Hydroxamic acid mediated heterogeneous Fenton-like catalysts for the efficient removal of Acid Red 88, textile wastewater and their phytotoxicity studies

Title
Hydroxamic acid mediated heterogeneous Fenton-like catalysts for the efficient removal of Acid Red 88, textile wastewater and their phytotoxicity studies
Authors
Saratale R.G.Sivapathan S.Saratale G.D.Banu J.R.Kim D.-S.
Ewha Authors
김동수
SCOPUS Author ID
김동수scopus
Issue Date
2019
Journal Title
Ecotoxicology and Environmental Safety
ISSN
0147-6513JCR Link
Citation
Ecotoxicology and Environmental Safety vol. 167, pp. 385 - 395
Keywords
2-Hydroxypyridine-N-oxide8-HydroxyquinolineGACHeterogeneous Fenton-like catalystHydroxamic acidPhytotoxicity
Publisher
Academic Press
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Heterogeneous Fenton-like catalyst and its industrial application are increasingly given importance for its non-selective mineralization of organic pollutants in broad pH range. Current study, utilized an aromatic hydroxamic acid derivative 2-hydroxypyridine-N-oxide (HpO), for the construction of iron-Hpo ligand catalyst supported on granular activated carbon (GAC). 8-Hydroxyquinoline and citric acid as non-hydroxamic aromatic and aliphatic Fenton-like catalysts were used for comparative evaluation of the efficiency with targeted catalyst (iron-HpO-GAC). This novel catalyst iron-HpO-GAC exhibits excellent efficiency in Acid Red 88 dye removal in the presence of hydrogen peroxide as oxidant at acidic, basic as well as at neutral conditions. Operational conditions for the catalytic oxidation including temperature, dye concentration, pH and catalyst dosage were systematically investigated and analyzed through kinetic studies. Thermodynamic analysis of the catalytic dye removal revealed that the system could oxidize pollutants faster with less activation energy requirement. Higher level of recyclability and stability of the catalyst with less iron leaching was achieved. Finally, the real time application of the catalyst was investigated through successful repeated treatment for actual industrial wastewater. The phytotoxicity assay (with respect to plant Phaseolus mungo) revealed that the degradation of Acid Red 88 and dye wastewater produced nontoxic metabolites which increases its potential application. This study emphasizes the viability of hydroxamate mediated efficient Fenton-like oxidation as a novel approach in designing economically viable pollutant removal technology. © 2018 Elsevier Inc.
DOI
10.1016/j.ecoenv.2018.10.042
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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