Chemical characteristics of rainwater at an urban site of south-central India

被引：195

作者：

Kulshrestha, UC ^{[1
]}

Kulshrestha, MJ ^{[1
]}

Sekar, R ^{[1
]}

Sastry, GSR ^{[1
]}

Vairamani, M ^{[1
]}

机构：

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

来源：

ATMOSPHERIC ENVIRONMENT | 2003年 / 37卷 / 21期

关键词：

acid rain; alkaline pH; ion balance; neutralization factor; calcium sulphate;

D O I：

10.1016/S1352-2310(03)00266-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The pH variation and the chemical characteristics of rainwater have been studied during monsoons from 1999 to 2001 at Hyderabad, a city in south-central India. The pH varied from 5.5 to 7.2 with an average of 6.4 which is in alkaline range considering 5.6 as the neutral pH of cloud water with atmospheric CO2 equilibrium. Out of 28 rain events, only two events were observed in acidic range (<5.6) which occurred after continuous rains. The equivalent concentration of components followed the order: Ca2+ > Cl- > SO42+ > NH4+ > NA(+) > HCO3- > K+ > Mg2+. The ratios of different components with respect to seawater ratios were observed to be higher, indicating the significant influence of non-marine sources at this site. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：3019 / 3026

页数：8

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