Thermal degradation kinetic property of waste salt during thermal treatment
LI Wei-shi1,2, HUANG Ze-chun2, LEI Guo-yuan1, XU Ya1,2, HUANG Ai-jun3, LIU Yu-qiang2, HUANG Qi-fei2
1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Research Institute of Soil and Solid Waste Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, China;
3. Xin Zhongtian Environment Protection Co., Ltd, Chongqing 400060, China
To explore the suitability of thermal treatment of pesticide waste salt, three typical pesticide waste salt, prochloraz, nicosulfuron and glyphosate, were studies by thermogravimetric analysis and kinetic model. The experimental result indicated prochloraz waste salt had a significant weightlessness phase, and its weight maintained constant basically after the temperature was higher than 600℃. Nicosulfuron and glyphosate wast salt had two significant weightlessness phase, and the rate of weight loss was significantly slower at temperatures above 300℃ and 450℃, respectively. The weightlessness processes of the combustion and pyrolysis of three types of waste salt were similar, which indicated that the existence of oxygen would not affect the thermal treatment process. Moreover, combined with the thermal treatment kinetic parameter, the thermal treatment of waste salt was complex reaction processes. The activation energy required for the combustion and pyrolysis of the nicosulfuron waste salt was similar to that of 0.297~5.894kJ/mol. And the thermal treatment of the nicosulfuron waste salt was most likely to occur. The activation energy of the combustion of prochloraz and glyphosate waste salt was lower than pyrolysis activation energy, indicating that oxygen could promote the thermal treatment of prochloraz and glyphosate waste salt. The thermal treatment would be in the air atmosphere.
Fellner J, Döberl G, Allgaier G. Comparing field investigations with laboratory models to predict landfill leachate emissions[J]. Waste Management, 2009,29(6):1844-1851.
[7]
Abdelaal, F, Rowe, R K. Effect of high temperatures on antioxidant depletion from different HDPE geomembranes[J]. Geotextiles and Geomembranes, 2014,42(4):284-301.
Jiang J G, Yang Y, Yang S H. Effects of leachate accumulation on landfill stability in humid regions of China[J]. Waste Management, 2010,30(5):848-855.
Ounas A, Aboulkas A, Elharfi K, et al. Pyrolysis of olive residue and sugar cane bagasse:non-isothermal thermogravimetric kinetic analysis[J]. Bioresource Technology, 2011,102(24):11234-11238.13381156040
[23]
Rath J, Staudinger G. Cracking reactions of tar from pyrolysis of spruce wood[J]. Fuel, 2001,80(10):1379-1389.
[24]
Feng Y, Jiang X, Chi Y, et al. Volatilization Behavior of Fluorine in Fluoroborate Residue during Pyrolysis[J]. Environmental Science & Technology, 2012,46(1):307-11.
Rajeshwari P. Kinetic analysis of the non-isothermal degradation of high-density polyethylene filled with multi-wall carbon nanotubes[J]. Journal of Thermal Analysis & Calorimetry, 2016,123(2):1-22.
Punnaruttanakun P, Meeyoo V, Kalambaheti C, et al. Pyrolysis of API separator sludge[J]. Journal of Analytical & Applied Pyrolysis, 2003, 68(3):547-560.
[31]
Yang S, Zhu X, Wang J, et al. Combustion of hazardous biological waste derived from the fermentation of antibiotics using TG-FTIR and Py-GC/MS techniques[J]. Bioresource Technology, 2015,193:156-163.
[32]
Wang H, Dlugogorski B Z, Kennedy E M. Kinetic modeling of low-temperature oxidation of coal[J]. Combustion & Flame, 2002,131(4):452-464.