Influence of crustal aerosols on wet deposition at urban and rural sites in India

被引：75

作者：

Jain, M

Kulshrestha, UC ^{[1
]}

Sarkar, AK

Parashar, DC

机构：

[1] Indian Inst Chem Technol, Div Analyt Chem, Hyderabad 500007, Andhra Pradesh, India

[2] Natl Phys Lab, Chem Sect, New Delhi 110012, India

来源：

ATMOSPHERIC ENVIRONMENT | 2000年 / 34卷 / 29-30期

关键词：

rain water; rural site; bulk deposition; dust; crustal SO4; ion balance;

D O I：

10.1016/S1352-2310(00)00350-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present study reports the pH and chemical composition of rain water at four urban sites of Delhi and one rural site away from Delhi. The collected samples were analysed for major cations (Ca, K, Mg, Na and NH3) and anions (SO4, NO3 and Cl). Data showed very high pH and Ca concentration at rural site which indicated the direct influence of crustal sources on rain water. It was estimated that a significant fraction of SO4 in rain water is contributed by crustal sources in this region. The association of high pH and high crustal SO4 suggested that crustal SO4 is not responsible for acidity or lowering the pH of rain water in India. Ion balance and conductivity balance for data qualify assessment was observed to be within USEPA recommended limits. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：5129 / 5137

页数：9

共 32 条

[1]

[Anonymous], 3 EXP M AC DEP MON N

[2]

[Anonymous], THESIS

[3] Deposition of acidic species at a rural location in New South Wales, Australia [J].