کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6307063 | 1618826 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Seasonal variations and size distributions of water-soluble ions of atmospheric particulate matter at Shigatse, Tibetan Plateau
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
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چکیده انگلیسی
Size-segregated atmospheric particulate matter (PM) samples were collected from July 2012 to September 2013 at Shigatse, high-altitude (3836 m above sea level) site on the south Tibetan Plateau (TP); objectives were to determine the characteristics and size distribution of water-soluble ions (WSIs). Eight major WSIs (Na+, K+, Mg2+, Ca2+, NH4+, Clâ, SO42â, and NO3â) were detected by ion chromatography. The total concentrations of WSIs were 6370 ± 1916 ng mâ3 in dry season (October - December, January - April), and 5261 ± 769 ng/m3 during wet phase (May - September). The contribution of K+ (130 ng mâ3), Clâ (2035 ng mâ3), SO42â (1176 ng mâ3), and NO3â (706 ng mâ3)âwere significantly enhanced in dry season, and that of Na+ (455 ng mâ3), Mg2+(65.4 ng mâ3), Ca2+(1034 ng mâ3), and NH4+ (1948 ng mâ3) were significantly enhanced during wet phase. Mg2+ and Ca2+ were concentrated in the coarse mode, and the other ions concentrated in fine mode and coarse mode during two seasons. The correlation coefficients between K+ and NH4+, Clâ, SO42â and NO3â were 0.58 (P < 0.01), 0.40 (P < 0.05), 0.82 (P < 0.01) and 0.69 (P < 0.01), indicating their dominant contribution from biomass burning in dry season. The significant correlation between NH4+ and HCO3â which were calculated by ion balance (r = 0.89, P < 0.01), suggesting the source from nitrogen fertilizers during wet phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 145, February 2016, Pages 560-567
Journal: Chemosphere - Volume 145, February 2016, Pages 560-567
نویسندگان
Yongjie Yang, Rui Zhou, Yan Yan, Yue Yu, Junqing Liu, Yi'an Di, Zhenyu Du, Dan Wu,