Trace elements in precipitation over an industrial area of Bombay

An extensive rainwater sampling program was carried out in the Chembur Trombay industrial belt of Bombay to assess the elemental composition of precipitation. The analytes included Hg, Cr, Sb, Pa, Fe, Sc, Sm, La, Eu, As, Co, Zn, Na, K, Ca, Mg, Br and Cl originating from marine, crustal and industrial sources. For comparison, their concentrations at a non-polluted coastal site (Alibag) were also studied. The elemental excesses were determined by calculating the enrichment factors with respect to Sc in the crust, and their probable sources have been examined.