Mechanism of the rapid mechanochemical degradation of HEXACHLOROBENZENE (cas 118-74-1) with silicon carbide as an additive

Add time:08/30/2019    Source:sciencedirect.com

Mechanochemical treatment (MCT) is a promising method for degrading HEXACHLOROBENZENE (cas 118-74-1) (HCB). Silicon carbide (SiC) was proposed in this study as a new additive to accelerate the reaction in MCT. The high performance of SiC was verified, and the relevant mechanism was explored. Graphite, amorphous carbon, CCl4, SiO2, and water-soluble chloride were confirmed as predominant products in the proposed method, and only trace-level low chlorinated benzenes were detected. The reaction pathway was revealed as follows: under the attack of free electrons, chlorine atoms were shed from the benzene rings of HCB to form Cl· radicals, which reacted with SiC to form SiCl4 and CCl4 and with the in situ-generated iron powder to produce Fe-based chloride. The left benzene rings were translated to graphite and amorphous carbon. As an intermediate product, SiCl4 further reacted with water vapor in the atmosphere to produce SiO2 and HCl. The in situ-generated iron powder could not remarkably accelerate the degradation reaction. The major contribution of SiC was the supply of free electrons to trigger the reaction. Two sources of free electrons were discussed. Friction heat resulting from hard SiC also contributed to the endothermic reaction of HCB degradation.

We also recommend Trading Suppliers and Manufacturers of HEXACHLOROBENZENE (cas 118-74-1). Pls Click Website Link as below: cas 118-74-1 suppliers

Prev:Lindane and HEXACHLOROBENZENE (cas 118-74-1) sequestration and detoxification in contaminated sediment amended with carbon-rich sorbents
Next:Review articleImpact of endocrine disruptor HEXACHLOROBENZENE (cas 118-74-1) on the mammary gland and breast cancer: The story thus far)