Efficient decomposition of liquid waste containing EDTA by advanced oxidation nanotechnology

H. Seshadri; P. Sinha

doi:10.1007/s10967-011-1595-8

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 292: Issue 2

Efficient decomposition of liquid waste containing EDTA by advanced oxidation nanotechnology

Authors:

H. Seshadri

H. Seshadri Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam, 603 102 India

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and

P. Sinha

P. Sinha Centralised Waste Management Facility, Bhabha Atomic Research Centre Facilities, Kalpakkam, 603 102 India

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Pages:: 829–835

Online Publication Date:: 10 Jan 2012

Publication Date:: 01 May 2012

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-011-1595-8

Keywords:: Photocatalyst; Ultrasonication; Photoreactor; Decontamination factor; Chemical precipitation

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Abstract

Degradation of ethylenediaminetetraacetic acid (EDTA) present in the liquid waste was demonstrated by photocatalytic oxidation route by using nanoparticles of anatase titania. Nano sized titania photocatalyst was synthesized using sol–gel method coupled with ultrasonication mode and characterized using X-ray diffraction, transmission electron microscope, BET, Fourier transform infrared spectroscopy and TG–DTA. A cylindrical photoreactor was employed for the degradation studies. Five milligram of the nano anatase TiO₂ + 0.5 ml of 30% H₂O₂ were employed as catalysts for the degradation studies of 1,000 mg/L EDTA. EDTA degradation was followed by a complexometric titration method. Complete degradation of 1,000 mg/L EDTA could be achieved in 90 min and the photocatalytic efficiency of the synthesized titania photocatalyst was higher than that of P-25 TiO₂ for EDTA degradation. The influence of pH on the degradation of EDTA follow the order acidic > neutral > alkaline. More than ten fold increases in the decontamination factors were obtained for the chemical precipitation step for the liquid waste containing degraded EDTA compared to liquid waste without EDTA degradation.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)