This project is to develop the environmental application of nanotechnology by Taiwan Environmental Protection Administration (TEPA). The main purpose is to make nano-materials in order to reduce the operational problems of reactive surface, easy aggregation, difficult in preservation, and uncertain health and environmental risks as well as to treat the complicated pollutants in water body. This study found the production methods to uniformly fix the nano-particles of 37 to 72 nm iron/nickel on micro-sized α-Al2O3 powders and multi-walled carbon nano-tube (MWCNT) to form new nano-materials. The particles could reduce the oxidation of iron by nickel, effectively catalyze the de-chlorination of the chlorinated solvent (trichloroethane, TCE), and simultaneously remove mixed pollutants (AO7 25/100 mg/l，HSeO3-/ SeO3-2 8.07 mg/l，Pb2+11.58 mg/l). With different iron contents, Fe-Ni/Al2O3 could remove 2 mg/L TCE of the surface-area normalized Pseudo- first order reaction rate coefficients of 0.16 to 0.38 L/h-m2 and could reduce the low concentration of mixed pollutants to effluent standards with slightly Ni release. Fe-Ni/CNT could reduce the high concentration of mixed pollutants to effluent standards with slightly Fe and Ni release at pH 5 and 7. After the treatment, the residual Fe-Ni nano-particles were more than 50% and could still be used again.

Nano Fe/Ni, CNT, Selenium, Lead, Dye