Environmental Monitoring and Assessment

, Volume 80, Issue 1, pp 17–31

Comparative Studies on Accumulation of Cr from Metal Solution and Tannery Effluent under Repeated Metal Exposure by Aquatic Plants: Its Toxic Effects



The present study demonstrates comparison of Cr accumulatingpotential by the plants of Najas indica Cham. (submerged),Vallisneria spiralis L. (rooted submerged) and Alternanthera sessilis R. Br. (rooted emergent) under repeatedmetal exposure and its effect on chlorophyll and protein concentrations. These plants were treated with different concentrations of Cr under repeated exposure in controlled laboratory conditions to assess the maximum metal accumulationpotential. The plants of V. spiralis accumulated significantly high amount of Cr under laboratory conditions incomparison to N. indica and A. sessilis. The maximumaccumulation of 1378, 458 and 201 μg g-1 dw Cr was found in the leaves of V. spiralis, N. indica and A. sessilis, respectively at 8 mg L-1 after 9 day of Cr exposure. These plants have shown a decrease in chlorophyll andprotein concentrations with increase in Cr concentrations. In view of high accumulation of Cr in V. spiralis, the plantswere treated with different concentrations of tannery effluent collected from Common Effluent Treatment Plant, Unnao (UP). Theplants of V. spiralis treated with 100% tannery wastewatershowed the maximum accumulation (57.5 μg g-1 dw) of Cr in the roots after 10 days of exposure. The plants were foundeffective in removing Cr from solution and tannery effluent.

accumulation Alternanthera sessilis chromium Najas indica tannery effluent Vallisneria spiralis 


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© Kluwer Academic Publishers 2002

Authors and Affiliations

  1. 1.Ecotoxicology and Bioremediation, Environmental Sciences DivisionNational Botanical Research InstituteLucknowIndia

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