Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China.
Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China.
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DOI：
10.1007/s11869-009-0062-y
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发表时间：
2010-09
期刊：
影响因子：
--
通讯作者：
Fu J
中科院分区：
文献类型：
--
作者：
Zhao J;Peng P;Song J;Ma S;Sheng G;Fu J
广州是中国珠江三角洲的中心城市，也是世界上污染最严重的城市之一。选取广州市市区（巫山）和近郊（大学城）两个典型采样点，每隔1个月或2个月采集1年降尘污染特征。计算了干沉降通量。此外，利用x射线衍射、扫描电镜和显微观察等方法研究了大气降尘的矿物组成和形态。结果表明：研究期间广州市沙尘通量为3.34 ~ 3.78 g/（m2月）；粉尘中主要矿物为石英、伊利石、方解石、高岭石、石膏、斜长石、白云石和无定形物质。形态类型包括颗粒状和片状的单体矿物、链状骨料、球形飞珠和不规则骨料，具有工业灰分的链状和球形骨料指标。主要的粉尘来自工业和建筑活动。冬季收集的粉尘中存在的石膏不仅来源于水泥粉尘，也可能来源于硫氧化物和氮氧化物光氧化产生的钙物质与硫酸的反应，证实了广州地区硫氧化物和氮氧化物污染严重。减少化石燃料燃烧排放和建筑扬尘将对降尘产生显著的有益效果。
Guangzhou is the central city in the Pearl River Delta (PRD), China, and is one of the most polluted cities in the world. To characterize the ambient falling dust pollution, two typical sampling sites: urban (Wushan) and suburban (University Town) areas in Guangzhou city were chosen for falling dust collection over 1 year at time intervals of 1 or 2 months. The flux of dry deposition was calculated. In addition, mineral composition and morphology of atmospheric falling dust were studied by X-ray diffraction, scanning electron microscopy, and microscopic observation. The results revealed that the dust flux in Guangzhou city was 3.34–3.78 g/(m2 month) during the study period. The main minerals in the dust were quartz, illite, calcite, kaolinite, gypsum, plagioclase, dolomite, and amorphous matter. The morphological types included grained and flaky individual minerals, chain-like aggregates, spherical flying beads, and irregular aggregates, with the chain-like and spherical aggregates indicators of industrial ash. The major dusts were derived from industrial and construction activities. The gypsum present in the dust collected in winter season was not only derived from cement dust but may also have originated from the reaction of calcic material with sulfuric acids resulting from photooxidation of SOx and NOx, which confirmed serious air pollution due to SOx and NOx in Guangzhou. The abatement of fossil fuel combustion emissions and construction dust will have a significant beneficial effect on dust reduction.
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DOI：
10.1007/s00254-003-0908-9
发表时间：
2004-02-01
期刊：
ENVIRONMENTAL GEOLOGY
影响因子：
--
作者：
Gómez, ET;Sanfeliu, T;de la Fuente, C
通讯作者：
de la Fuente, C
影响因子：
4.4
作者：
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通讯作者：
Toon, OB
影响因子：
3.3
作者：
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通讯作者：
Belozerova, Olga Yu
影响因子：
11.4
作者：
Del Vento, Sabino;Dachs, Jordi
通讯作者：
Dachs, Jordi
影响因子：
11.4
作者：
Hope, Bruce K.
通讯作者：
Hope, Bruce K.