Phytoremediation of soil contaminated with chromated copper arsenate (CCA) using Eucalyptus species
Rathna Kumari BM, Raveesha HR
The soil is gradually undergoing contamination with heavy metals and is mainly due to natural processes and human activities. Among various remedial techniques, phytoremediation is known to be effective in mitigation of polluted metals in the soil. The performance of two fast growing tree species, Eucalyptus citriodora and Eucalyptus tereticornis, was evaluated for their tolerance and accumulation of CCA compounds viz Cr, Cu and as in potting conditions. The results showed that seeds of both Eucalyptus species recorded better germination. Similarly, the root and shoot length and biomass of these species were high in saplings grown under lower concentrations and were decreased with increase in the levels of CCA. Surprisingly, the roots of the Eucalyptus species accumulated greater levels of CCA than shoot. Thus, it is concluded that, E. citriodora and E. tereticornis are potential phytoremediation agents of the soils contaminated with CCA.