Antony, Jismy and Niveditha, S.V. and Gandhimathi, R. and Ramesh, S.T. and Nidheesh, P. V. (2020) Stabilized landfill leachate treatment by zero valent aluminium-acid system combined with hydrogen peroxide and persulfate based advanced oxidation process. Waste Management, 106. pp. 1-11. ISSN 0956053X

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The toxic leachate generated from landfills is becoming a major nuisance to the environment and has vital role in groundwater contamination. This study evaluated the potential of zero valent aluminium (ZVAl) based advanced oxidation processes (AOPs) for stabilized landfill leachate treatment. Hydrogen peroxide (HP) and persulfate (PS) were used to generate additional radicals in aerated ZVAl acid process. ZVAl-acid system achieved 83% COD removal efficiency under optimized conditions such as acid washing time of 20 min, ZVAl dose of 10 g L�1 at initial pH 1.5. The highest exclusion efficiencies in terms of TOC, COD as well as color were 83.52%, 96% and 63.71% respectively in treatment systems showing the following order: ZVAl/H+ /Air/HP/PS > ZVAl/H+ /Air/PS > ZVAl/H+ /Air/HP > ZVAl/H+ /Air > ZVAl/H+ . The involvement of other metals such as Fe and Cu in the process has been found. The reusability study revealed that ZVAl powder can be effectively used up to three cycles. The 28.48 mg/l of Al3+ residue was observed in this process which has to be removed before discharge of effluent. The study indicated that the ZVAl based AOPs is stable and active for the degradation of organic pollutants present in landfill leachate and a promising solution except for the aluminium discharge which has to be given special care.

Item Type: Article
Uncontrolled Keywords: Leachate; Advanced Oxidation Process: Zero Valent Aluminium; Chemical Oxygen Demand; Hydrogen Peroxide; Persulfate
Subjects: Industrial Wastewater Treatment & Disposal
Water Pollution
Waste Water Treatment
Depositing User: Dr. Nidheesh P V
Date Deposited: 18 Jan 2021 08:58
Last Modified: 18 Jan 2021 08:58

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