Air pollution and acid rain in Chongqing City: The source and formation

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:466147

Xu, Yu ^[1]

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1. Chongqing Institute of Environmental Science and Monitoring, Sichuan (China)

Chongqing, the biggest city of Southwestern China, is suffered from air pollution and acid rain for a long time. Studies have shown that coal-burning results in pollution of sulfur dioxide and causes acid rain on a wide range in the area. Emission of sulfur dioxide has met by 0.8 million tons in Chongqing a year. Concentrations of sulfur dioxide in ambient air are above 0.20 mg/m{sup 3} during the recent thirty years. Results of precipitation monitoring show annual precipitation-weighted mean pH ranged from 3.91 to 4.70 and sulfate concentrations ranged from 8.71 mg/1 to 26.29 mg/1 in Chongqing for the past decades. The equivalent ratio of SO{sup 2-}{sub 4} / NO{sup -}{sub 3} in Chongqing (also in China) is higher than those in other countries. It is found that fog water is also acidified in Chongqing City and the concentrations of pollutants in fog water are much higher than those in rain.

• OSTI ID: 466147
• Report Number(s): CONF-9606185--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
ACID RAIN
AIR POLLUTION
CHINA
ECOLOGICAL CONCENTRATION
SULFUR DIOXIDE