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The removal of undesired chlorinated hydrocarbon contaminants through chemical destruction using ex situ Pd-based catalytic or in situ Fe-based reductive nanomaterials offers unique advantages over current physical displacement methods for groundwater treatment. While these two types of chemical methods has been studied in-depth in recent years, their respective hydrodechlorination and dechlorination...
The iron particles extracted from biological and abiotic reactors were used to be characterized and compared with each other. TEM, SEM, XRD and XPS were utilized to observe and quantify the particle morphology and oxidized iron precipitates. Unlike the Fe3O4 and Fe2O3 coating of nanoscale zero-valent iron (NZVI) particles in the abiotic reactors, the major component of the coating of the activated...
This paper examines the potential for using the microemulsion method synthesized nanoscale Pd/Fe bimetallic particles to reduce trichloroethene (TCE, C2HCl3) in water. The water-in-oil (W/O) microemulsion system was made up of iso- octane, cetyltrimethyl-ammonium bromide (CTAB), butanol and water, and was characterized by measuring the conductivity of the solution. The changes of water content in...
Nitrate reduction using laboratory synthesized Fe/Ni bimetallic nanoparticles was discussed. Nanoparticles were characterized by TEM-EDS, SEM, XRD and BET techniques. Denitriflcation of 80 mg-N/L nitrate solutions was performed with various Ni contents (1.0, 5.0, 10 and 20%) nanosized Fe/Ni particles compared with monometallic nano-scale FeO. The introduction of Ni enhances the reduction rate remarkably...
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