Chromium-tolerant bacteria in diversified soil microbial community in the bank of tannery waste water discharging canal of East Calcutta, West Bengal
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 4, Issue 3
Abstract
Studies have revealed that East Calcutta Wetlands harbor a variety of microbial population possessing diverse genetic characters with versatile enzymatic and metabolic activities. They carry out bioremediation of different toxins, pollutants, heavy metals etc. Due to the discharge of improperly treated effluents from tanneries and other industries in and around Calcutta City, carcinogenic chromium (Cr6+) contamination of both surface water and ground water has been reported in the East Calcutta Wetland area. A few examples in microbial diversity in this area include Rhodococcus sp., Bacillus sp., Pseudomonus sp., Azotobacter sp., Aeromonas sp. etc. The primary objective of this study was to isolate and identify a potent chromate-reducing bacterial strain. Cr6+ analysis was done and the bacterial population was enumerated by analyzing soil samples from different locations. The majority of the chromate-resistant bacteria isolates from the tannery effluents enriched soil showed a minimum inhibitory concentration (MIC) of Cr6+ ranging from 50 to 750 mg l-1. About 39.47% of the total 38 isolates of bacterial strains were able to grow at 200 mg l-1 Cr6+. The potent Cr6+-resistant isolates showed a very high tolerance level to 750 mg l-1 and were able to show 100% Cr6+ reduction up to 200 mg l-1 within 48 h. The present study conclusively demonstrates the ability of native microbial population present in tannery effluent to reduce Cr6+ compounds. Furthermore, all the isolates have shown great potential for bioremediation of Cr6+-containing wastes. It is also reported that plant roots release some inorganic and organic compounds which aid the microbial community in the bioremediation of heavy metal pollutants in the soil. This approach permits the selection of bacterial strains which could be used for specific environmental cleanup operations.
Authors and Affiliations
Piku Sen, Anandita Pal, Budhhadeb Chattopadhyay, D. Pal
Keywords
Related Articles
- EP ID EP37605
- DOI -
- Views 182
- Downloads 0
Resistin and homeostasis model assessment insulin resistance index in obese men
Resistin, an adipocyte-derived factor has been shown to be associated with inflammatory conditions, obesity and insulin-resistant rodents and humans. In order to investigate whether serum resistin is different between o...
The Association between benthic invertebrates and aquatic macrophytes in a tropical lake, Nguru Lake: a preliminary survey
This study was carried out with the purpose of determining which benthic invertebrate fauna are associated with aquatic macrophytes in Nguru Lake. Water and sediment samples were collected over a twelve month period be...
Determining effects of irrigation stress on growth and yield of potato cultivars in Ardabil cold region
To determine effects of irrigation stress on growth and yield of experimental potato cultivars, 6 potato cultivars were studied in Ardabil Agricultural Research Station. To perform test, split plot statistical design ba...
Correlation, multiple regression and path analysis for some yield-related traits in safflower
Safflower (Carthamus tinctorius L.) is an important oilseed crop which is cultivated predominantly in semiarid and temperate regions of the world. The aim of this study was to use statistical methods of phenotypic corr...
Assessment of ethnoecological knowledge, practices and perceptions among traditional communities of Karakorum Mountain Ranges: A special reference to Berberis spp
Karakoram Mountain Ranges exhibit complex taxonomic floral composition and has remained one of the mother sanctuaries for cultures. Centuries long folk wisdom among these self-reliant cultures got purified over generat...