The Environmental Monitoring Center Station of Hangzhou City

Hangzhou, China

The Environmental Monitoring Center Station of Hangzhou City

Hangzhou, China
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Han Y.,Nankai University | Xu H.,Nankai University | Bi X.-H.,Nankai University | Lin F.-M.,The Environmental Monitoring Center Station of Hangzhou City | And 3 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2013

Rainwater and atmospheric particle samples were collected from June, 2008 to June, 2009 in Hangzhou, which is located in the most serious acid rain pollution areas of China. To research the effect of atmospheric particles on the chemical composition and acidity of precipitation during washout process under cloud, particle sampling was carried out before, during and after rain processes. The variations of TSP and PM10 before, during and after rain processes were analyzed to explore the scavenging effect on particles by rain. Principle component analysis was used to analyze the origin of main ions in precipitation. TSP and PM10 showed certain acid buffer capacity with A-value of 1.95 and 1.02, respectively. According to the variations of particles' concentration, acid buffer capacity and chemical compositions in three (before, during and after) rain processes, it can be concluded that rain has significant washout effect on the alkaline components in particles. Combine with the rain principal component analysis, particulate matters made a significant contribution to Ca2+ and Na+, and little contribution to NH4 +, SO4 2- and NO3 -, its contribution to Mg2+ and K+ needed to be further validated, F- and part of Cl- were mainly originated from rainout process and washout of gaseous pollutants.


Li X.-X.,Zhejiang University | Sun G.-J.,Zhejiang University | Wang X.-W.,Zhejiang University | Tian W.-L.,Hangzhou Heyi Environment Technology Company | And 2 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2013

Road test was carried out on four typical roads in Hangzhou district, including high way, express way, arterial and residential road. Then vehicular CO, HC, NOx and PM10 emission inventory was established based on the test. And the contribution from different vehicle types, fuel usage, emission standards and road types to the total vehicular emission was analyzed. Results showed that there were significant differences in the emission contributions among different vehicle types. Passenger car, taxi and bus were the major CO and HC contributors. Heavy truck and bus contribute most to NOx and PM10 emissions and passenger car was also the NOx main contributor. The NOx and PM10 contribution rates of diesel vehicle were greatly larger than its quantities contribution. Diesel vehicle was the major source of NOx and PM10 and gasoline vehicle was the major source of CO and HC as well. The Euro I and pre- Euro I vehicles make significantly contribution to total CO, HC, NOx and PM10 emission with the contribution rates were 66%, 65%, 58% and 82%, respectively; while its quantities contribution was about 30%. Vehicles on arterial road were the main source of CO, HC and NOx and account for about 66%, 65% and 64% to total vehicular emissions, respectively. Vehicles on residential road contribute about 55% vehicular PM10 emission and became the main source of vehicular PM10 emission.


Xu H.,Nankai University | Lin F.-M.,The Environmental Monitoring Center Station of Hangzhou City | Bi X.-H.,Nankai University | Jiao L.,The Environmental Monitoring Center Station of Hangzhou City | And 3 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2011

Samples of dustfall and PM 10 as well as source samples of PM 10 were collected from June 2006 to May 2008 at four monitoring stations of Hangzhou City. Twelve metals were quantified: chromium, manganese, nickel, lead, zinc, cobalt, aluminum, iron, potassium, sodium, calcium and magnesium. The deposited dust amount and concentration of PM 10 was lower than most of the other cities in China. The dustfall and PM 10 had different seasonal changing-mode. The similarity of spatial distribution implicated that both the amount of dustfall and concentration of PM 10 were influenced by human activities. The chemical components of PM 10 between Zhaohui and Yuquan were similar, whereas there was no high similarity between PM 10 and dustfall in those sampling stations. Combined with the profiles of three PM 10 sources, the similarity between PM 10 and its sources was higher than that between dustfall and PM 10 sources. It indicated that the dustfall and PM 10 might come from different sources and it may cause the differences between the chemical characteristics of the dustfall and that of PM 10.

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