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PHYTOREMEDIATION OF PERCHLORATE AND N-NITROSODIMETHYLAMINE AS SINGLE AND CO-CONTAMINANTS
Specific objectives of the project are to: 1) determine the fate of perchlorate taken up into plants and after senescence; 2) evaluate the feasibility of using plants to degrade NDMA; 3) identify the transformation pathways and mechanisms of phytoremediation of NDMA; 4) establish whether woody plants selectively take up perchlorate or NDMA when they occur as co-contaminants; and 5) determine the role of nitrate during phytoremediation of NDMA.
Although potential plant species suitable for phytoremediation of perchlorate and the phytoprocesses involved (rhizodegradation and phytodegradation) have been identified in previous research, regulators and some critics argue that plants recycle the perchlorate fraction taken up into the plant. There is no published work to date on phytoremediation of N-nitrosodimethylamine (NDMA). The proposed studies will include laboratory, greenhouse and field components. Test plants for the phytoremediation of perchlorate and NDMA will be willow (Salix nigra) and eastern cottonwood (Populus deltoides).