Characterization of Dioxins and Heavy Metals in Chelated Fly Ash

Municipal solid waste incineration (MSWI) fly ash contains highly toxic heavy metals and polychlorinated dibenzo dioxins/furans (PCDD/Fs), which are a type of hazardous waste. The pollution characteristics have changed with the development stoker grate incinerators treatment technology; however, no research has been focused on this in recent years. In study, 12 samples were collected from 9 power plants southeastern China, their PCDD/Fs metal concentrations determined compared to previous data. concentration was range 0.002–0.051 ngI-TEQ/g, an average 0.027 ngI-TEQ/g. Furthermore, 1,2,3,4,6,7,8-HpCDD OCDD made most significant contributions PCDDs. distribution 10 dioxins exhibited bimodal, unimodal, normal characteristics. Linear fitting demonstrated strong correlation between toxicity 1,2,3,7,8-PentaCDD, 1,2,3,7,8-PentaCDF, 2,3,4,7,8-PentaCDF. Concerning metals, Pb poses environmental risk. This is first time that treated chelating agent thoroughly analyzed, vital for understanding level derived current plants.