"Nano-iron particles" that can effectively decompose including dioxins, heavy metals, and other chlorine-containing organic and inorganic environmental pollutants, especially detergents become excellent "iron" is a very rich nature reserves, ranking fifth element thus obtain very low cost. Although small iron particles Nano invisible, but it's decontamination unimaginable power, and therefore said to be "green Hercules" is not an exaggeration. Traditional first generation of contaminated groundwater extraction processing practices currently used in the US after the second generation of the iron wall filter decontamination technology improvements, the decontamination technology combines nanotechnology to produce the third generation of environmental nanotechnology. After the iron made "nano iron particles" liquid-like appearance, such as "nano-slurry" to sinking mode access to the contaminated aquifer directly injected slurry nano, nano particles are able to adsorb decomposition of iron-containing chloro-organics, heavy metals, radionuclides, pesticides and inorganic pollutants, not only economical and environmentally friendly, reduce toxic byproducts. Nano particles of iron by the attention of the parties, because of his various environmental pollutants repopulation has potential. Nano iron particles have a high surface area and high reactivity. Most importantly, they provide great flexibility for use in situ. Biography nano iron particles Synthesis system is the use of sodium borohydride reduction of divalent or trivalent iron while, and iron nano particle size range produced in 1-100nm, an average of 60 nm, a surface area of approximately 35m2 / g, for permeable reactive walls words, nano iron particles than traditional iron particles is 10 to 1000 times. Nano particles of iron with 15 kinds of halogenated alkanes reactive. Also determines the rate constants for these reactions. At different temperatures (5-50 C), nano iron particles were reacted with TCE, and the activation energy of 44.9 kJ / mole. If an increase of 0.5% palladium would have lived to enhance the reaction rate and reduce reaction activation