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Stabilized landfill leachate treatment by zero valent aluminium-acid system combined with hydrogen peroxide and persulfate based advanced oxidation process

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Title Stabilized landfill leachate treatment by zero valent aluminium-acid system combined with hydrogen peroxide and persulfate based advanced oxidation process
 
Creator Antony, Jismy
Niveditha, S.V.
Gandhimathi, R.
Ramesh, S.T.
Nidheesh, P. V.
 
Subject Industrial Wastewater Treatment & Disposal
Water Pollution
Waste Water Treatment
 
Description 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.
 
Publisher Elsevier
 
Date 2020
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1275/1/2020%20Jismy%20Waste%20Management.pdf
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
 
Relation http://dx.doi.org/10.1016/j.wasman.2020.03.005
http://neeri.csircentral.net/1275/