Abstract
Particle matter (PM) emitted from coal combustion can cause great harm to human health and the environment. The existence of hazardous trace element arsenic (As) in PM intensifies its toxicity. In this work, four particle sizes of fly ash PM (PM 10) before the electrostatic precipitator (ESP) in a 600 MW coal-fired power plant were sampled by a Dekati low pressure impactor (DLPI). The coal sample, bottom ash, and ash from ESP (ESP ash) were collected simultaneously. Concentrations of total and valent As (As3+ and As5+) in the sample were determined by the inductively coupled plasma-mass spectrometry (ICP-MS) and high performance liquid chromatography (HPLC) coupled with ICP-MS, respectively. The morphological structure and chemical components of the PM surface were characterized by scanning electron microscopy (SEM) and X-ray fluorescence spectrometry (XRF). Results show that the coal used for the power plant is low-sulfur and low-chlorine bituminous coal with 3.851 mg/kg of As. T...
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