NH4+, NO3-, and SO42- in roadside and rural size-resolved particles and transformation of NO2/SO2 to nanoparticle-bound NO3-/SO42-

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題NH4+, NO3-, and SO42- in roadside and rural size-resolved particles and transformation of NO2/SO2 to nanoparticle-bound NO3-/SO42-
出版類型SCI(Sciences Citation Index)
出版年度2009
AuthorsLin Chih-Chung, 林志忠, Kuo-Lin Huang 黃國林, Shui-Jen Chen 陳瑞仁, Tsai Jen-Hsiung 蔡仁雄, Yuan-Chung Lin 林淵淙, & Wen-Yinn Lin 林文印
開始頁2731
頁數5
出版日期2009 / 6
其他編號0000
中文摘要

This study investigates ammonium, nitrate, and sulfate (NH4+, NO3-, and SO42-) in size-resolved particles (particularly nano (PM0.01–0.056)/ultrafine (PM0.01–0.1)) and NOx/SO2 collected near a busy road and at a rural site. The average (mass) cumulative fraction of secondary inorganic aerosols (SO42-+NO3-+NH4+) in nano or ultrafine particles at the roadside was found to be three to four times that at the rural site. The above three secondary inorganic aerosol species were present in similar cumulative fractions in particles of size 1–18 μm at both sites; however, dissimilar fractions were observed for Cl-, Na+, and K+. The nitrogen ratios (NRs: NR = NO3--N/(NO3--N + NO2-N)), sulfur ratios (SRs: SR = SO42--S/(SO42--S + SO2-S)), dNR/DP (derivative of NR with respect to DP (particle diameter)), and dSR/DP (derivative of SR with respect to DP) at the roadside were higher than those at the rural site for nano/ultrafine particles. At both sites (particularly the roadside), the nanoparticles had significantly higher dNR/DP and dSR/DP values than differently sized particles, implying that NO3-/SO42- (from NO2/SO2 transformation or NO3-/SO42- deposition) were present on these particles.

期刊名稱Atmospheric Environment
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