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Removal of lead from contaminated soils by Typha angustifolia
A greenhouse study was demonstrated for removal of lead (Pb) from contaminated soil by the narrow — leaved cattail, Typha angustifolia. The plants were grown in sandy loam soil containing various concentrations of Pb(NO3)2 (53.3, 106.7, 160, 213.3, and 266.7 mg Pb kg-1 soil). Most lead was accumulated in roots and then transported to leaves. In soil contaminated with 266.7 mg kg-1 of lead, the plants accumulated 7492.6 mg Pb kg-1 dry weight in the roots and 167 mg Pb kg-1 dry weight in the leaves. Yet, no growth retardation from lead was detected. T. angustifolia has high potential as a plant to clean up lead contaminated soil due to its vigorous growth, high biomass productivity, and because it is a perennial in nature. Further work is required to study on the iron plaque formation and its role in metal immobilization
Lead Accumulation in the Straw Mushroom, Volvariella volvacea, from Lead Contaminated Rice Straw and Stubble
Phytoremediation: an alternative tool towards clean and green environment
Wetlands being the most productive and ecologically sensitive and adaptive ecosystems are constantly being challenged with anthropogenic pressures due to their wide variety of services they provide to mankind. The vast expansions of human population and associated activities have put a tremendous amount of pressure on these naturally occurring resources. Uncontrolled discharge of effluents in water from various sources resulted into altered nature of the associated ecosystems giving rise to several health issues and problems. Hence, realising the urgent need of protecting these ecologically fragile ecosystems several adaptive measures have been taken. In this connection, it is found that the available conventional methods are not feasible on various grounds like their cost, their by-products, time frame, etc. Therefore, the use of plants emerged as the alternative and promising tool for safe and sustainable ecosystem supporting life.Sandhya Misra, and Krishna G. Misra