Antichlor for degrading organochloride and preparation thereof

Abstract

The invention relates to a dechlorination agent for degrading an organic chloride, in particular to the dechlorination agent with active ingredients of coexisting zero-valent iron and composition metal oxide and a method for the production thereof, the preparation process comprises the preparation of a hydrotalcite-like material and the preparation of a composition metal oxide as well as a dechlorination implementing method. The hydrotalcite-like material has the chemical formula of: [M<2+>(1-x)M<3+>(x(OH)2]A(x / n)*mH2O, where the M<2+> can be a divalent metal ion such as Mg<2+>, Zn<2+> or Ni<2+>, the M<3+> is a trivalent metal ion such as Al<3+>, Cr<3+> or Fe<3+>, and the x is 0.2<=x<=0.4, A represents the interlayer anion such as CO3<2->, NO3<-> or Cl<->. The obtained hydrotalcite is positioned in a muffle furnace for being calcined for two to five hours at a temperature of between 250 and 600 DEG C so as to obtain the demanded composition metal oxide. The iron powder and composition metal oxide are positioned in an organic chlorides solution of between 10ppm and 800mg / L in a mass ratio of 10-25: 0.4-1, the constant temperature is maintained at 25 to 80 DEG C, the vibration is kept for two to eight hours at a rate from 200 to 800r / min, and the dechlorination rate reaches 70 percent to 98 percent. The dechlorination agent has advantages of high efficiency, low cost, non-toxicity and easy preparation, and can be used for degrading various organic chlorides.

Description

technical field [0001] The invention relates to a dechlorination agent for degrading organic chlorides and a preparation method, in particular to a dechlorination agent whose active component is the coexistence of zero-valent iron and composite metal oxides, a preparation method and a dechlorination implementation method. Background technique [0002] Organic chlorinated compounds include chlorinated, chlorinated olefins, chlorinated aromatics, and organochlorine pesticides. With the development of the organic chemical industry, it has been widely used in medicine, tanning, electronics and pesticides, etc., resulting in a large amount of chlorine-containing compounds and intermediate products or by-products in the synthesis process being discharged into the environment in large quantities. Some organic chlorides in the environment will deplete the ozone in the atmosphere, and some will harm the human central nervous system and induce cancer. The most effective way to deal wi...

AI Technical Summary

Problems solved by technology

Studies have found that zero-valent iron has disadvantages such as poor reductive dechlorination activity and incomplete degradation of some chloride systems, especially those with a large content.