Municipal Solid Waste Leachates Destruction and Metals Recovery by Supercritical Water Oxidation. Issue 5 (4th March 2018)

• Record Type: Journal Article
• Authors: Zou, D. A.; Chi, Y.; Dong, J.; Wang, F.; Ni, M. J.
• Is Part Of: Energy sources. Volume 40:Issue 5(2018)
• Page Start: 473
• Page End: 479
• Publication Date: 2018-03-04
• Subjects: chemical oxygen demand -- degradation kinetics -- leachate -- metal recovery -- supercritical water oxidation; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2012.728679
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: Municipal solid waste leachate dissolved with nitrates of Cr, Pb, and Cu was investigated using a supercritical water oxidation process in this study. The destruction efficiency of chemical oxygen demand increased with the higher temperature and longer reaction time. A first-order expression applied for chemical oxygen demand was determined with a pre-exponential factor of 318 s –1 and activation energy of 58 kJ/mol. Recovery efficiency of Cr, Pb, and Cu from initial solution into solid product increased with the higher temperature and longer reaction time. X-ray diffraction of solid products showed that the metal species were found to be Cu2 O, HCrO2, and CaCO3 at temperature 400°C, while the structure were identified as CuO, Cr2 O3, PbCrO4, and CaCO3 at temperature 500°C.