Assessment of in-plant particulate matter and its toxic metals contents of sponge iron industry in Goa, India.

The present study attempted to assess toxic metal contents (Arsenic, Cadmium, Copper, Cobalt, Chromium, Iron, Manganese, Nickel, Lead and Zinc) in Total Suspended Particulate (TSP) and Particulate Matter less than ten micron (PM10) in three sponge iron industries in Goa (India), one of the famous tourist place on the World map. TSP and PM(10) average concentration in all three sponge iron industries were found to be in the range 401-485 µg/m³ and 135-270 µg/m³ respectively. Amongst all the metals, concentration of iron was the highest in TSP as well as in PM10. Statistical results indicate that proportion of specific metals were found higher in PM10 as compared to the ratio of PM10/TSP ratio. Value of correlation coefficient was found to be significant for Cr-Pb indicating coal burning was the major source contributor.

Assessment of environmental benefits of flyover construction over signalized junctions: a case study.

In the present study, the impact of the flyover construction to curb traffic congestion problem has been assessed in terms of traffic decongestion, time saving, fuel saving and emission reduction. A flyover has also been constructed over four signalized junctions in the main commercial area in Nagpur city, India. It was found that about 35% of the total traffic is diverted to the flyover, which results in a reduction of about 32% in the total emission generation. Travel on the flyover resulted in as much as 60-70% saving in time, compared to the travel on the main road, particularly when all the four signals are found to be in the red phase. The loss of fuel for combustion and the associated cost resulting from waiting for the signal to change are also estimated, and these are found to be significant.