Abstract
To characterize airborne particles near high-tech industrial parks, this case study used an eight-stage micro-orifice uniform deposit impactor sampler to analyze trace metal patterns in different size groups of airborne particles at the Central Taiwan Science Park (CTSP) in Taichung. To rapidly screen out the potential pollution sources according to the analytical results, a novel model based on expected value theory is proposed. The analytical results show that the ambient air near the CTSP is rich in fine and ultrafine particles and V, As, Ga and Cd have significant increases in ultrafine particles between upwind and downwind areas of CTSP. The proposed source screening tool indicates that CTSP is the major contributor to airborne concentrations of Ga and As in the ambient air near the CTSP, especially in fine and ultrafine particles.
Highlights
Airborne particles are related to many adverse health outcomes on the human cardiovascular and respiratory systems (Dominici et al, 2006)
To rapidly screen out the potential pollution sources according to the analytical results, a novel model based on expected value theory is proposed
The high variation in the downwind group implies that local wind fields have an important effect and that the developing Central Taiwan Science Park (CTSP) is being under unstable operation
Summary
Airborne particles are related to many adverse health outcomes on the human cardiovascular and respiratory systems (Dominici et al, 2006). The potential health risk is highly related to the size and composition of particles and their capability to carry toxic compounds (Spurny, 1998; Hinds, 2012). Ultrafine particles (UFPs), i.e., particles with a diameter less than 100 nm, have attracted great attention due to their high deposition fraction, large available surface area, potential to translocate to the circulatory system, the ability to induce inflammation and higher toxicity than larger size particles (Hinds, 1999; Allen et al, 2001; Morawska et al, 2001). Due to the large available surface area, trace metals are often accumulated in fine airborne particles
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