Air quality status during Diwali festival of India: a case study.

The PM(2.5) and PM(10) samples were collected during Diwali celebration from study area and characterized for ionic concentration of four anions (NO(3) (-), NO(2) (-), Cl(-), SO(4) (2-)) and five cations (K(+), Mg(2+), NH(4) (+), Ca(2+), Na(+)). The results showed that the ionic concentrations were three times compared to those on pre and post Diwali days.

Assessment of occupational exposure to VOCs at the Gantry gasoline Terminal.

The gasoline components dispersed in the workplace environment have direct impact on human health because of their carcinogenic and mutagenic potential. The volatile portion of these compounds generally consists of a mixture of monoaromatics such as benzene, toluene, ethylbenzene, xylenes and substituted benzene compounds. Investigation of levels of these chemicals at the petroleum liquid storage, and distribution facilities is of growing importance for assessing the occupational exposure of workers at these locations.

Seasonal variation of toxic benzene emissions in petroleum refinery.

Petroleum refineries are largest chemical industries that are responsible for the emission of several pollutants into the atmosphere. Benzene is among the most important air pollutants that are emitted by petroleum refineries, since they are involved in almost every refinery process. Volatile organic compounds (VOCs) are a major group of air pollutants, which play a critical role in atmospheric chemistry.

Monitoring of hydrocarbon emissions in a petroleum refinery.

In a petroleum refinery the hydrocarbon emissions which are mostly fugitive in nature are emitted from process, offsites and periodic accidental releases such as: materials storage & handling, process, equipment leaks, solvent evaporation, combustion sources, waste treatment etc. In India, the monitoring of such emissions in a refinery are limited as also the standards are not set for its limit in ambient air. Hence there is an urgent need for generating a database for such emissions.

Effect of analytical techniques on measured ambient NO2 concentrations.

A study was carried out with specific reference to NO2 measurements in three countries (designated as A, B and C), which use three different manual methods; viz. Sodium Arsenite, Greiss Saltzman and TGS-ANSA for the determination of NO2 in ambient air. Significant deviation (up to 36 + %) was observed in measured NO, ion concentration when spiked samples were analyzed using these methods.