A method for decomposition of hexachlorobenzene by gamma-alumina.
A method of decomposing hexachlorobenzene (HCB) by gamma-alumina was investigated at low temperature of 300 degrees C. It was found that HCB was rather quickly decomposed under such a condition. Decomposition efficiency (DE) increases with increasing the surface area of gamma-alumina. Pretreated gamma-alumina has a better performance for the decomposition reaction. A high decomposition efficiency within the short reactive time of 60 min was achieved to be 94.2%, which was obtained by preheating gamma-alumina with the surface area of 220 m(2)g(-1) at 450 degrees C for 2 h. High surface area and appropriate pretreatment temperature probably provide more reactive sites such as the isolated OH groups and Al(3+) sites surrounded by O(2-) sites. These sites may induce the decomposition of HCB via a main ring-cracking process. The present study, hopefully, holds the promise for the eliminating of HCB contained hazardous materials in industrial application.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
Lifei
L
Zhang
Minghui
M
Zheng
Wenbin
W
Liu
Bing
B
Zhang
Guijin
G
Su
D000537:Aluminum Oxide / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D006581:Hexachlorobenzene / Q000737:chemistry*; D006358:Hot Temperature; D018505:Waste Management / Q000379:methods
D004785:Environmental Pollutants; D006581:Hexachlorobenzene; D000537:Aluminum Oxide