Journal of Stress Physiology & Biochemistry, Vol. 7, No. 4,
2011, pp. 335- 346. ISSN 1997-0838
Original Text Copyright (cc) 2011 by Mohanty and Patra
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 6
Attenuation of Chromium toxicity in mine waste water using water hyacinth
Mohanty M.* and H.K. Patra
Laboratory of Environmental Physiology, Department of Botany, Utkal University Bhubaneswar-751004 *E-mail: 18.monalisa@gmail.com
Tel-+919861077321
Received October 3, 2011
The mine waste water at
South Kaliapani chromite mining area of Orissa (India) showed
high levels of toxic hexavalent chromium (Cr+6). Cr+6
contaminated mine waste water poses potential threats for biotic
community in the vicinity. The current field based phytoremediation
study is an in situ approach for attenuation of Cr+6
from mine waste water using water hyacinth (Eichhornia crassipes) weeds
by rhizofiltration method. The weeds significantly reduced (up to
54%) toxic concentrations of Cr+6
from contaminated mine waste water when passed through succeeding water
hyacinth ponds. The reduction of toxic chromium level varied with the
plant age and passage distance of waste water. Chromium
phytoaccumulation and Bio-Concentration Factor (BCF) was maximum at
growing stage of plant i.e. 75 days old plant. High BCF (10,924)
and Transportation Index (32.09) for water hyacinth indicated that the
weeds can be used as a tool of phytoremediation to combat the problem
of in situ Cr contamination in mining areas.
Key words: Chromium stress / Mine waste water / Phytoremediation / Water hyacinth
