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    Join date : 2011-09-05
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    Phytoremediation Empty Phytoremediation

    Post  Admin on Wed Sep 07, 2011 5:27 pm

    What is Phytoremediation? Discuss its Applications Civil Services General Studies question paper-II 2010 ( 150 words)

    Phytoremediation refers to the use of plants for cleaning up contaminants in soil, groundwater, surface water and air. It is a cost-effective and non-polluting way to remove toxic chemicals that contaminate soil and water and also it offers remediation of brownfield sites. Phytoremediation has several methodologies which includes

    1. Phytoextraction or phytoconcentration : contaminant concentrated in roots, stem and foliage of plan.

    2. Phytodegradation: plant enzymes help catalyze breakdown of the contaminant molecule.

    3. Rhizosphere biodegradation: plant roots release nutrients to mircro-organisms which are active in

    bio-degradation of the contaminant molecule.

    4. Volatilization : transpiration of organics, selenium and mercury run through leaves of the plant

    5. Stabilization: ant converts the contaminant into a form which is not bioavailable, or the plant prevents the spreading of a contaminant plume.

    Applications of Phytoremediation

    • The principal application of Phytoremediation is for lightly contaminated soils, sledges and waters where the material to be treated is at a shallow or medium depth and the area to be treated is large, so that agronomic techniques are economical and applicable for both planting and harvesting.

    • Phytoremediation can be applied for producing energy from controlled combustion of harvested biomass

    • Applied for harvesting valuable metals that are dispersed in soil

    • Applied for providing quick remediation of Brownfield sites.

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