Phytoremediation of cadmium

Mechanisms and Strategies for Phytoremediation of Cadmium

INTRODUCTION
    Phytoremediation
    Advantages of Phytoremediation
    Limitations of Phytoremediation

BIOAVAILABILITY OF CADMIUM
    Cation Exchange Capacity (CEC)
    pH
    Soil Amendments
    Competitive Cations
    Fertilizer
    Mycorrhizae
    Chelation
       Phytochelatins (PCs)
       Phytochelatin Effectiveness
       Role of Sulfur in PCs
       Oxidative Stress
       Translocation
       Metallothioneins
       Organic Acids
       EDTA / EGTA

CADMIUM TOLERANCE AND
ACCUMULATION IN PLANTS
    Cell Wall Binding
    Reduced Transport
    Compartmentalization
    Chelation
    Phytoextraction factors
       Table 1. Plant Accumulation
       Hyperaccumulators

CONCLUSIONS

BIBLIOGRAPHY

BIOAVAILABILITY OF CADMIUM

As mentioned previously, not all Cd in soil is available for uptake by a plant. The degree of availability for uptake is called bioavailability, and is affected by numerous factors which may be manipulated to improve Cd phytoextraction.

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Page Created 4-18-00
Sam Cox
Department of Horticulture
Colorado State University
samcox@lamar.colostate.edu
http://lamar.colostate.edu/~samcox/index.htm