Phytovolatilization ant its type....

1. VIVEKANADHA ARTS AND SCIEINCE
COLLEGE FOR WOMEN
Veerachipalayam,Sankagiri,Salem.
DEPARTMENT OF MICROBIOLOGY
TOPIC : PHYTOVOLATILIZATION
Guided By: Presented By:
Dr.R.Dinesh Kumar,. Bhuvaneswari.P
Assistant professor, I- Msc.Microbiology.
Department of microbiology.
SUBJECT :
BIOREMEDIATION

2.  DEFINITION
 INTRODUTION
 TYPES
 MECHANISM
 ADVANTAGES
 DISADVANTAGES
CONTENT

3. DEFINITION
 Involves plants taking up contaminants them into volatile
forms and transpiring them into atmosphere.
 Works on organic compounds and heavy metal
Contaminants ,TCE as well.
 Mercury is the primary metal Contaminant that this process has Been
used for.

4. INTRODUCTION
 Phytovolatilization involves the uptake of
Contaminants by plant roots and its conversion
to a gaseous state, and release into atmosphere.
 This process is derived by the evaopotion spiration of plants.
 Plants that have high evaopotran spiration rate
sought after in phytovolatilization.
 Organic contaminants ,especially volatile organic compounds are
passively
Volatilized by plants.
FOR EXAMPLE;
 Hybrid poplar trees have been used to volatilize trichloroethylene by
converting it to chlorinated acetates and CO2.

5. TYPES
 Two different types of phytovolatilization.
Such as,
(A) Direct phytovolatilization,
(B) Indirect phytovolatilization.

6. Direct Phytovolatilization
 Direct phytovolatilization is the more intuitive
and better studied form, resulting from plant
Uptake and translocation of contaminants.
 It leads to volatilization of the compound from
The stem/trunk and leaves.historically this
Process is simply called phytovolatilization.
 The direct phytovolatilization pathway often
Differs from transpiration.

7. INDIRECT PHYTOVOLATILIZATION
Indirect phytovolatilization is the increase in Volatile
contaminant flux from the subsurface
resulting from plant root activities.these process
Cause profound changes in subsurface chemical
Fate and transport.
The activites of plant roots can increase the
Flux of volatile contaminants from the
Subsurface through the following mechanism;
 Lowering the water table.
 Increased soil permeability.
 Chemical transport via hydraulic redistribution.

8. DIAGARAM

9. MECHANISM
 Plant absorb.
 Convert the toxic contaminants into less toxic.
Form.

10. ADVANTAGES
 Contaminants removal from soil.
 Transformed to less toxic products.
 No residuals management.
 The contaminant,mercuricion, may be transformed into less toxic
substance.

11. DISADVANTAGES
 Moving problem from one media to another.
 Possible air monitoring.
 The mercury released into the atmosphere is
likely to be recycled by precipitation and then
Re-deposited back into lakes and oceans,
repeating the production of methyl-mercury by
anaerobic bacteria.