LEVELS AND WATER SOLUBLE ORGANIC CARBON OF ATMOSPHERIC NANOPARTICLES IN A LOCATION OF HA NOI, VIET NAM

Nguyen Thi Thu Thuy, Nghiem Trung Dung, Kazuhiko Sekiguchi, Ryosuke Yamaguchi, Ly Bich Thuy, Nguyen Thi Thu Hien

Abstract


Atmospheric nanoparticles (NPs or PM0.1) were investigated at a site inside the campus of Ha Noi University of Science and Technology (HUST) in Ha Noi, Viet Nam. The sampling was conducted during a rainy season (August, 2015) and a dry season (October to December, 2015). Mass was weighed by an electronic micro-balance, Sartorius ME2, 10-6 g. Number concentrations were measured by an electrical mobility spectrometer (NanoScan, SMPS TSI Model 3910). Water soluble organic carbon (WSOC) was analyzed by a total carbon analyzer (TOC-VCHP, Shimazu). The correlations between WSOC and other components were studied to primarily identify the sources of atmospheric nanoparticles. Secondary organic carbon (SOA) was estimated using elemental carbon (EC) – tracer method. Selected characteristics of nanoparticles including mass concentrations, number concentrations, and WSOC were determined.


Keywords


nanoparticles, mass concentration, number concentration, WSOC, SOA, Hanoi

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DOI: https://doi.org/10.15625/2525-2518/55/6/9618

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Published by Vietnam Academy of Science and Technology