Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Principal Component Analysis of Heavy Metals in Atmospheric Aerosols from Meycauayan, Bulacan, Philippines

Version 1 : Received: 4 February 2022 / Approved: 8 February 2022 / Online: 8 February 2022 (14:55:34 CET)

How to cite: Galvez, M.C.D.; Vallar, E.; Castilla, R.M.; Mandia, P.; Branzuela, R.; Rempillo, O.; Orbecido, A.H.; Beltran, A.; Ledesma, N.; Deocaris, C.; Morris, V.; Belo, L.P. Principal Component Analysis of Heavy Metals in Atmospheric Aerosols from Meycauayan, Bulacan, Philippines. Preprints 2022, 2022020120 (doi: 10.20944/preprints202202.0120.v1). Galvez, M.C.D.; Vallar, E.; Castilla, R.M.; Mandia, P.; Branzuela, R.; Rempillo, O.; Orbecido, A.H.; Beltran, A.; Ledesma, N.; Deocaris, C.; Morris, V.; Belo, L.P. Principal Component Analysis of Heavy Metals in Atmospheric Aerosols from Meycauayan, Bulacan, Philippines. Preprints 2022, 2022020120 (doi: 10.20944/preprints202202.0120.v1).

Abstract

This paper focuses on the application of principal component analysis (PCA) to conduct a source apportionment of atmospheric aerosols from 8 sampling locations along the Marilao-Meycauayan-Obando River System (MMORS). Aerosols were collected on May 2016 during the same time that water samples were collected. Elemental analysis was conducted using a scanning electron microscope coupled with energy dispersive x-ray (SEM-EDX). Carbon (C), nitrogen (N), oxygen (O), sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), sulfur (S), chlorine (Cl), potassium (K), calcium (Ca), titanium (Ti), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), bromine (Br), niobium (Nb), barium (Ba), mercury (Hg), and lead (Pb) concentrations were measured and used as inputs in Principal Component Analysis (PCA). The aerosol samples showed the presence of heavy metals Pb and Hg, elements that were also detected in trace amounts in the water measurements. Concentrations of heavy metals Fe, Pb, Hg in the aerosols were attributed to industrial sources. However, it was determined that the primary source of aerosols in the area were traffic and crustal emissions (C, N, O, Si, Al, Ca). Thus, control of traffic emissions would be more beneficial in reducing aerosol emissions in Meycauayan.

Keywords

Meycauayan; aerosols; source apportionment; principal component analysis; MMORS

Subject

EARTH SCIENCES, Atmospheric Science

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