چكيده لاتين :
The growing trend of industrialization has marked impact on the atmospheric chemistry around the
globe. Such impacts are also predicted for developing countries like India. Acid precipitation due to secondary pollutants
is one of them. The present investigation was conducted with an aim of studying the precipitation chemistry over
Asansol city, India during the monsoon season, The rain water samples, collected on event basis during the period of
June to September 2006, were analyzed for HCO^- , CL^- , SO^-2, NO^- , NH^+, K^+, NA^+, MG^+2, CA^+2 AND PH using standard
procedures, The study revealed that the precipitation was alkaline in nature with mean pH value of 6,08. Dominant
anion in rain water samples was HCOl
י (36 %), whereas Ca2+ was highest among the cations (53 %), The observed acidic
events, based on pH value, were only 17 %, indicating the alkaline components effectively neutralize rain water over
the area. This was also supported by the total alkaline to acid ion ration of 1.05. Thc ratio of (N0^-+CI^-) and SO^-2 was
(GREATER THAN)1, indicating that acidic properties were influenced by HNO, and HCL. In the ratio between (Ca ^+2 + NH^ 4:) and
(NO^-+SO^-2), values (GREATER THAN)1 were obtained, indicating significant alkaline influence, which effectively prevented acid
depositions in the area.
