Atmospheric Deposition of Metals in TSP of Guiyang, PR China

Abstract

Total concentrations and speciation of metals had been studied in TSP of Guiyang from April 2006 and January 2007, PR China. The average concentration ranged from 14.48 ng m(-3) for Cd to 1,161.45 ng m(-3) for Zn. The concentrations of Cd, Cr, Pb and Zn were significantly higher during winter than those at other seasons. The environmentally mobile fractions of Cd and Zn were the highest in the three stages. The highest proportion of Pb was the fraction that bound to carbonate and oxide. Cr and Cu were clearly restricted to the fraction that bound to silicate and organic matter.

Physico-chemical analysis of Logone River water at Moundou City in Southern Chad

“…The highest observed downstream concentration of Cu (0,294 mg/l) is higher than the recommended limit set by WHO (0,02mg/l). This may be attributed to domestic sewage and runoff from the extensive farmed area (Wu et al, 2008). Also, the highest downstream concentration of Cd in Logone water found (1,767 mg/l), which occurred in winter season, is higher than the limiting value of 0,01 mg/l recommended by WHO.…”

The Study Of Physico- Chemical And Bacteriological Parameters Of River Salandi And Assessment Of Water Quality Index From Hadagada Dam To Akhandalmani, Bhadrak, Odisha, India

“…But earlier report of pollution control Board reveals that they have discharge the effluents of high concentration of Chromium to the river Salandi [18]. Although, at present, some chromite mines are not running, but the mining effluents left by them earlier without proper treatment has resulted open exposure of chromite mixed soil to the atmosphere and pollute the river Salandi with chromium through atmospheric rain precipitations as river Salandi is the only natural drainage system in the study area [5,9,30,47,54,68,69]. Hence more concentration of Cr 6+ is found from Bidyadharpur to Baudpur in the month of August and October is due to entry of mining discharges, industrial discharges [17], agricultural effluents, atmospheric rain precipitation and geology of river bed and catchment area [29,67].…”

“…Besides, open defecation in the river bed [15,27,35], burning and throwing of dead bodies and holding of socio-cultural function in the river bed [44,55] contribute significantly to the problem along with low flow of water and precipitation of contaminated dust through the rain water [9,30,54,68,69].…”

Assessment and Measurement of Atmospheric Pollution (Particulate Matter) Around Zawiya City-Libya

“…Total suspended particulate (TSP) in the ambient atmosphere can arise from a wide variety sources, forest fires, sea spry, volcanic emission, dust storms, soil and rock erosion, [10][11][12]. Natural sources, like dust, generally contribute aerosols of sizes>10 µm in diameter, while anthropogenic sources contribute <10 pm (classified under PM10 sized aerosols) [13].…”