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Phytoremediation of Sewage-Fed Wetlands of East-Kolkata, India - A Case Study

Author Affiliations

  • 1 Department of Zoology, Vidyasagar University, Midnapore-721102, West Bengal, INDIA
  • 2 Institute of Engineering and Management, Sector-V, Saltlake, Kolkata-700091, INDIA

Int. Res. J. Environment Sci., Volume 4, Issue (1), Pages 80-89, January,22 (2015)


Degree of purification of water qualities had been assessed in different sewage-fed wetlands in Kolkata Metropoliton Area, West-Bengal, India by one of the predominant macrophytic components, Eichhornia crassipes, locally named as water hyacinth from the littoral belts of the studied aquatic systems. This study has revealed that water quality was improved significantly with the reduction in values of BOD, COD, TDS, etc. All those sewage loaded aquatic bodies were considerably polluted which were manifested by higher values of Pollution Load Index and water quality Index during the present study. Besides, toxic metals from this aquatic environment have also been found to be reduced to a considerable extent which was evident by the deduction of bio-concentration factor of toxic metals. These results have indicated that toxic metals were absorbed in this plant community to a great extent from its readily available form in the aquatic medium. Thus, water-hycinth as a most flourishing and abundant macrophyte is being recommended as an important biotic agent for the bio-remediation and eco-restoration of pollution loaded aquatic systems.


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