Impact assessment of various parameters polluting Ganga water in Kolkata Region: a study for quality evaluation and environmental implication.
The quality of sewage-sludge samples obtained in Kolkata region was evaluated. Both sewage water and sludge components were analyzed for a number of physico-chemical, microbiological parameters using standard laboratory procedures, some heavy metals by AAS method and pesticide contents by GC method. Some of the physical and chemical constituents of the samples are within the allowable levels while the rest are not. The samples are rich in nutrients and have suitable pH for agricultural uses. In terms of Electrical Conductivity and Sodium Adsorption Ratio, sewage water is not suitable for irrigation. Fecal and coliform bacterial population is high in all samples. Pesticide and heavy metals in some places are alarming. So sewage-sludge produced in Kolkata cannot be used for agricultural purpose without any treatment. Thus proper care, maintenance, treatment and disposal of sewage water and sludge are most vital and should be the prime thrust for the nation.
Purkait
Swarnali
S
Department of Agricultural Chemistry and Soil Science, Institute of Agricultural Science, Ballygunj Science College, University of Calcutta, Kolkata 700019, India.
Ganguly
Madhumita
M
Aktar
Wasim
W
Sengupta
Doipayan
D
Chowdhury
Ashim
A
D000383:Agriculture; D004755:Enterobacteriaceae / Q000302:isolation & purification; D004784:Environmental Monitoring / Q000379:methods*; D007194:India; D019216:Metals, Heavy / Q000032:analysis*; D010575:Pesticides / Q000032:analysis; D012722:Sewage / Q000032:analysis* / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D019216:Metals, Heavy; D010575:Pesticides; D012722:Sewage; D014874:Water Pollutants, Chemical