五氯酚在低转速短时间内球磨脱氯（英文）

In order to apply grinding method for degradation of pentachlorophenol (PCP) to an industrial scale, the propor-tion of different materials CaO, SiO2 and CO(NH2)2] and the size of grinding balls were examined. For saving en-ergy and increasing dechlorination efficiency, the rotation speed and grinding time were maintained at relatively low values. At a mass ratio of grinding bal s to materials (40:1), PCP was added into a big steel jar (300 ml) with other materials to grind at 300 r·min?1 for 5 h. The results indicated that when PCP was mixed with CaO and SiO2 in a molar ratio of 1:60:60, the best dechlorination of 58.4%was achieved. CO(NH2)2 could not be used as hydro-gen donor in the dehalogenation by mechanochemical reaction, since it restrained the dechlorination process. The size of grinding balls has significant effect on the reaction. The experiment with 5 mm steel balls indicates that the weight is too light to provide appropriate energy for the reaction, while steel balls of 10 and 15 mm could give better dechlorination reaction. It indicates that dechlorination depends on the mass of balls and fill rate.

Dechlorination of pentachlorophenol by grinding at low rotation speed in short time

In order to apply grindingmethod for degradation of pentachlorophenol (PCP) to an industrial scale, the proportion of differentmaterials CaO, SiO₂ and CO(NH₂)₂] and the size of grinding balls were examined. For saving energy and increasing dechlorination efficiency, the rotation speed and grinding time were maintained at relatively low values. At a mass ratio of grinding balls to materials (40:1), PCP was added into a big steel jar (300 ml) with othermaterials to grind at 300 r·min^-1 for 5 h. The results indicated thatwhen PCPwasmixedwith CaOand SiO₂ in a molar ratio of 1:60:60, the best dechlorination of 58.4% was achieved. CO(NH₂)₂ could not be used as hydrogen donor in the dehalogenation bymechanochemical reaction, since it restrained the dechlorination process. The size of grinding balls has significant effect on the reaction. The experimentwith 5mmsteel balls indicates that the weight is too light to provide appropriate energy for the reaction, while steel balls of 10 and 15 mm could give better dechlorination reaction. It indicates that dechlorination depends on the mass of balls and fill rate.