Abstract
Abstract This study investigates the chemical characteristics of particles that were collected from the open burning of wax apple agricultural waste, and evaluates the impact of such burning on regional air quality. The water-soluble ions, elemental carbon (EC), and organic carbon (OC) in fine (Dp ≤ 2.5 μm) and coarse (2.5 ( NH 4 + , NO 3 − and SO 4 2 − ) decreased. The Na+/Cl− molar ratios of fine particles before, after, and during the open burning 0.40, 0.18, and 0.24, respectively; however, the corresponding (Na+ + K+)/Cl− molar ratios were 0.74, 0.99, and 0.39, respectively. OC, K+ and Cl− were quite abundant in the open burning of agricultural waste (wax apple), and the OC/Na+, K+/Na+, and Cl−/Na+ (mass) ratios in fine particles (318, 10.2, and 10.5, respectively) may be used as reference indexes associated with the open burning of wax apple waste.
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