Pollution

Pollution has become a global problem and the results are implied in high levels of contaminations reported for soil, water, air, plants and animals. In the present study, Al-Nahrawan is one of the most known industrial regions in Iraq. Samples of soil, water and air were taken for study. These samples were contaminated by different heavy metals like Pb, Cr, Cu, Fe and Zn that were characterized with low pH when compared with normal non industrial regions. The present results indicate that Al-Nahrawan region is affected widely by heavy metals contamination in soil, water and air as a result of industrial activities.

The present study reports the physiochemical and biological parameters of water and identification of organisms present in Kolavai Lake, Tamil Nadu, India. The lake is heavily polluted due to the dumping of municipal and agriculture wastes from surrounding localities.  Water samples were collected from different places across the lake and examined. Eleven microorganisms were identified by primary and secondary biochemical assays and two bacterial samples were sequenced with 16S rRNA regimen to identify the species. Obtained results were compared with standard values. The new bacterial species identified belonged to taxa Brevundimonas nasdae and Microbacterium trichothecenolyticum which are uncommon in this area.