Dechlorination/detoxification of aromatic chlorides using fly ash under mild conditions

• Published in: Waste management (Elmsford) Vol. 29; no. 12; pp. 3004 - 3008
• Main Authors: Ghaffar, Abdul, Tabata, Masaaki
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2009; Elsevier
• Subjects: Applied sciences; Carbon - chemistry; Chlorine - isolation & purification; Coal Ash; Exact sciences and technology; Hazardous Waste - analysis; Metals - chemistry; Naphthalenes - chemistry; Nitrobenzenes - chemistry; Other wastes and particular components of wastes; Oxidation-Reduction; Particulate Matter - chemistry; Pollution; Urban and domestic wastes; Waste Management - methods; Wastes; Water - chemistry; Incineration plant; Fly ash; Dechlorination; Chlorides; Urban waste; Detoxification; Aromatic compound; Reducing agent; Low temperature
• ISSN: 0956-053X; 1879-2456
• DOI: 10.1016/j.wasman.2009.06.013

An efficient dechlorination/detroxification method for p-nitrochlorobenzene, p-chloroanisole and 1-chloronaphthalene on municipal waste incinerator fly ash in presence of reducing agents with water/alcohol mixtures was developed. Dechlorination% was higher in water/isopropanol mixture at temperature <100 °C. Metal contents of fly ash played a vital role in enhancing dechlorination at low temperature. Moreover, the fly ash particles provided the surface to accomplish reduction and substitution reactions by adsorbing the chlorinated aromatic compound, hydrogen and hydroxyl ions. The mechanism of dechlorination was envisaged.