Mutagenicity evaluation of industrial sludge from common effluent treatment plant.
Sludge from common effluent treatment plant (CETP) receiving effluents from textile industries at Mandia Road, Pali, was analyzed to assess the level of mutagenicity. Mutagenicity assay using Salmonella typhimurium tester strains TA 98 and TA 100 gave positive results, thus suggesting presence of genotoxic contaminants in the samples investigated. Further, mutagenic activity of chemical sludge was found to be lesser than that of biological sludge. This result is very surprising and unexpected as it is indicating that some mutagenic compounds are either being formed or certain promutagenic compounds are being converted into stable mutagenic metabolites during the biological treatment of the wastewater effluents. There have been no previous reports giving similar or contrary results. Most of the previous studies have reported effects of single combined sludge.
Mathur
Nupur
N
Environmental Toxicology Unit, Department of Zoology, University of Rajasthan, Jaipur 302004, India. nupurmathur123@rediffmail.com <nupurmathur123@rediffmail.com>
Bhatnagar
Pradeep
P
Mohan
Krishna
K
Bakre
Prakash
P
Nagar
Pankaj
P
Bijarnia
Mahendra
M
D007194:India; D007220:Industrial Waste; D009152:Mutagenicity Tests; D009153:Mutagens / Q000633:toxicity*; D012486:Salmonella typhimurium / Q000235:genetics*; D012722:Sewage; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D014876:Water Pollution / Q000517:prevention & control
D007220:Industrial Waste; D009153:Mutagens; D012722:Sewage; D014874:Water Pollutants, Chemical