Chemical composition of rainwater and anthropogenic influences in Chengdu, Southwest China

	Chemical composition of rainwater and anthropogenic influences in Chengdu, Southwest China
	Hua Wang; Guilin Han
通讯作者	Guilin Han
	2011
发表期刊	Atmospheric Research
卷号	99 期号:2 页码:190-196
摘要	A comprehensive study on the chemical compositions of rainwater was carried out from Jan. to Dec. in 2008 in Chengdu. a city located on the acid rain control zone of southwest China. All samples were analyzed for pH and major ions (F(-), Cl(-), NO(3)(-), SO(4)(2-), K(+), Na(+), Ca(2+), Mg(2+), and NH(4)(+)). The pH increased due to the result of neutralization caused by the base ions. It was observed that Ca(2+) was the most abundant cation with a VWM value of 196.6 mu eq/L (17.3-1568.7 mu eq/L), accounting for 49.7% (9.4%-79.2%) of the total cations. SO(4)(2-) was the most abundant anion with VWM value of 212.8 mu eq/L (41.8-1227.6 mu eq/L). SO(4)(2-) and NO(3)(-) were dominant among the anions, accounting for 90.4%-99.1% of the total measured anions. The concentrations of NO(3)(-) were higher than the most polluted cities abroad, which indicated Chengdu has been a severe polluted city over the world. The high fuel consumption from urbanization and the rapid increase of vehicles resulted in the high emission of SO(2) and NO(x), which were the precursor of the high concentration of acidic ions NO(3)(-) and SO(4)(2-). It was the main reason of the severe acid rain in Chengdu. The high concentrations of alkaline ions (mainly Ca(2+), NH(4)(+)) in Chengdu city atmosphere have played an important role to neutralize the acidity of rainwater and the pH value has increased by 0.7 units since 1989. It is worth noting that the emission of NO(x) from the automobile exhaust is increased and is becoming the important precursor of acid rain now.
关键词	Acid Rain Major Ions So42− No3− Southwest China
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/7019
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
通讯作者	Guilin Han
推荐引用方式 GB/T 7714	Hua Wang,Guilin Han. Chemical composition of rainwater and anthropogenic influences in Chengdu, Southwest China[J]. Atmospheric Research,2011,99(2):190-196.
APA	Hua Wang,&Guilin Han.(2011).Chemical composition of rainwater and anthropogenic influences in Chengdu, Southwest China.Atmospheric Research,99(2),190-196.
MLA	Hua Wang,et al."Chemical composition of rainwater and anthropogenic influences in Chengdu, Southwest China".Atmospheric Research 99.2(2011):190-196.

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