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The spatial and temporal distribution of various trace elements in water and suspended solids in urban runoff from residential and industrial sites was studied. 240 sequential urban runoff samples from 39 rain/storm events were collected, processed and analyzed for 13 elements (12 metals – Al, Co, Cd, Cr, Cu, Fe, Mn, Pb, Ni, Ti, V, and Zn, and one metalloid – As). The experimental protocol used in...
A short term study of the chemical composition of rainwater was carried out from November 1999 to October 2000 in Singapore. The rainwater was typically acidic with a mean pH of 4.2. Sulfate was the most abundant ion and comparable to the results reported for other industrialized regions. The concentrations of major ions (NH 4+ , Ca 2+ , K + , Na + , Mg ...
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