| 英文摘要 |
This year project implementation period from January 1 to December 31, indicator work including 5 times the coal-fired boiler flue gas, 6 times agricultural waste burning and 5 times diesel cars exhaust PM2.5 sampling and chemical composition analysis, to establish the source profile ,meteorological analysis,PM2.5 ＆health risk assessment, air quality forecasting/response system build, PM2.5 pollution source analysis by CMB model and control strategy benefit assessment. And the completion of the 17 times protection propaganda, "Prohibit burning bituminous coal" press conference and" PM2.5 prevention seminar " and other outreach activities, overall progress towards rate is 100%.
In PM2.5 sources profile build achievement, this year has been the establishment of 18 pen sources profile, including the 5 stationary sources (coal-fired boiler flue gas) data, 5 mobile sources (diesel cars) data and 8 fugitive sources (agricultural waste combustion )data. One for stationary sources of coal-fired boiler flue sampling results show that the content of condensable particles PM2.5 (CPM) were higher than the filtration of particles (FPM), display PM2.5 sampling should be included in the CPM to evaluate PM2.5 emissions completely. In the chemical composition analysis, sulfate ions (SO42-) is the highest proportion, followed by is carbon composition. In addition selenium (Se) and barium (Ba) is the characterized species by coal-fired boiler flue gas.
Diesel cars exhaust sampling results, PM2.5/TPM ratio is 91.7% ~ 95.3%, particulate emissions almost all PM2.5, and CPM concentrations are much higher than the proportion of FPM concentrations. In the chemical composition analysis, the highest proportion is carbon, reaching 70.7 ~ 79.3%, where in EC> OC, elemental carbon (EC) is characterized elements from the diesel cars exhaust.
Another sampling results from agricultural waste burning, PM2.5 emissions of chlorine salt, potassium salt, dehydrated glucose, mannose dehydration, sulfate, phosphate as the main indicator species from the rice straw combustion. Levo/Manno glucose ratio and ionic salts ratio (Cl-/K+) can be use as agricultural waste combustion characteristic ratios.
The current year build air quality forecasting/response system, and complete weather patterns and air quality model effectiveness evaluation, providing the next two days test forecast including weather and pollutant modeling results every day from July 1, and upload them to the air quality forecasting website. When there may PM2.5 pollution event occurred, it can simultaneously through the analysis and diagnosis of pollution sources. To provide immediate causes of pollution and contribution account, let government to start the warning strain before the pollution event occurred.
The CMB ,GTx, CMAQ model result, show the county PM2.5 pollution sources to stationary sources, the main pollutant species with a high proportion of SO42-, major emission source categories contain derivatives secondary nature of ammonium sulfate, nitrate secondary, and the original nature of diesel vehicles (including gasoline), crust, petrochemical industry (fuel) and industrial coal, of which the second derivative of the maximum amount of the contribution of ammonium sulfate.
In PM2.5 propaganda, this year completed total 845 visitors of village self- protection propaganda, and printed 3,000 copies of leaflets for some outreach activities use. In addition the 244 times broadcasting on radio and 30 days scrolling text on TV, effectively warning the people make self-protection when pollution event occurred. Furthermore to hold "Prohibit burning bituminous coal press conference"and"PM2.5 prevention seminar",show the county government determined to launch air pollution defense, promote inter-county air pollution control strategy cooperation.
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