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

doi:10.1016/j.cjche.2014.11.017

›› 2015, Vol. 23 ›› Issue (3): 578-582.DOI: 10.1016/j.cjche.2014.11.017

• 能源、资源与环境技术 • 上一篇下一篇

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

Zhi Xu¹, Xiaoyu Zhang², Qingzhi Fei¹

1 Department of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China;
2 Institute of Environmental Engineering, Dalian Jiaotong University, Dalian 116028, China

收稿日期:2013-06-20 修回日期:2014-02-12 出版日期:2015-03-28 发布日期:2015-04-03
通讯作者: Qingzhi Fei

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

Zhi Xu¹, Xiaoyu Zhang², Qingzhi Fei¹

1 Department of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China;
2 Institute of Environmental Engineering, Dalian Jiaotong University, Dalian 116028, China

Received:2013-06-20 Revised:2014-02-12 Online:2015-03-28 Published:2015-04-03

摘要/Abstract

摘要： 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.

关键词: Dechlorination, Pentachlorophenol, Rotation speed, Grinding time

Abstract: 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.

Key words: Dechlorination, Pentachlorophenol, Rotation speed, Grinding time

Zhi Xu, Xiaoyu Zhang, Qingzhi Fei. Dechlorination of pentachlorophenol by grinding at low rotation speed in short time[J]. , 2015, 23(3): 578-582.

参考文献

[1] L. Tange, D. Drohmann,Waste electrical and electronic equipment plastics with brominated flame retardants-from legislation to separate treatment-thermal process, Polym. Degrad. Stab. 88 (2005) 35-40.
[2] S. Tomio, T. Masamitsa, Development of Fluidized Bed Gasification and Swirl-flow Melting Process for Municipal Solid Wastes, The University of Seoul Press, 2002. 1-10.
[3] H. Ecke, H. Sakanakura, T. Matsuto, State-of-the-art treatment processes for municipal solid incineration residues in Japan, Waste Manag. Res. 18 (2000) 41-51.
[4] H. Hagenmaier, M. Kraft, H. Brunner, Catalytic effects of fly ash from incineration facilities on the formation and decomposition of polychlorinated dibenzo-pdioxins and polychlorinated dibenzofurans, Environ. Sci. Technol. 21 (1987) 1080-1084.
[5] T.O. Tiernan, D.J. Wagel, G.F. VanNess, Treatment of complex chemical wastes with the base catalyzed decomposition (BCD) process, Organohalogen Compd. 8 (1992) 289-292.
[6] W. Shi, J. Zhang, Photodegradation mechanism and its influential factors of PVC, Chin. Synth. Resin Plast. 23 (2006) 80-84.
[7] L. Huang, X.D. Li, PCDD/Fs control technologies in themunicipal solid waste incineration processes, Power Syst. Eng. 21 (2005) 5-7.
[8] J. Gao, Distribution, microbial effects and bioremediation of PCBs in typical polluted agricultural soils in the Yangtze River Delta, Ph. D. Thesis, University of Zhejiang, China, 2005.
[9] T. Zhang, X.X. Cheng, Progress of the research on persistent organic pollutants, Scitech Inf. Dev. Econ. 17 (2007) 206-208.
[10] V. Birke, Mechanochemical reductive dehalogenation of hazardous polychlorinated contaminants, J. Mater. Sci. 39 (2004) 5111-5116.
[11] H. Masaaki, Degradation of POPs pesticides by mechanochemical treatment, POPs, Forum, 2008, pp. 166-167.
[12] Y.M. Li, K. Zhang, Q.Z. Fei, Degradation of persistent organic pollutants-pentachlorophenol by mechanochemical method, J. Dalian Jiaotong University 32 (2011) 68-71.
[13] Q.W. Zhang, F. Saito, Effects of quartz addition on the mechanochemical dechlorination of chlorobiphenyl by using CaO, Environ. Sci. Technol. 35 (2001) 4933-4935.
[14] Y.L. Wei, Mechanism and experimental study on POPs degradation by mechanochemical method, Ph. D. Thesis, University of Zhejiang, China, 2010.
[15] F.S. Wei, Inorganic Anion Monitoring and Analysis Method of Water and Waste Water, China Environmental Science Press, Beijing, 2002. 180-183 (ISBN7-80163-400-4).
[16] X.Y. Shen, Y.C. Zhai, Preparation of ultramicro silica power and study on eliminating hydroxide, Bull. Chin. Ceram. Soc. 26 (2007) 542-546.
[17] C. Benoit, G. Anne, D.R. Francesco, Gas adsorption in mesoporous micelle-templated silicas: MCM-41, MCM-48, and SBA-15, Langmuir 22 (2006) 11097-11105.
[18] J. Teofil, K. Andrzej, Influence of silane coupling agents on surface properties of precipitated silicas, Appl. Surf. Sci. 172 (2001) 18-32.
[19] D.M. He, C.C. Zhang, Study on preparation and modification of nanosilica aqueous solution and properties of compound formed, J. Wuhan University of Technology 25 (2003) 7-10.
[20] X.L. Xie, L.Y. Guo, B.D. Xu, Research on surface modification of silica, Appl. Chem. Ind. 36 (2007) 703-704.
[21] H. Mio, S. Saeki, J. Kano, Estimation of mechanochemical dechlorination rate of poly (vinylchloride), Environ. Sci. Technol. 36 (2002) 1344-1348.
[22] J.H. Yan, Z. Peng, S.Y. Lu, Degradation of PCDD/Fs by mechanochemical treatment of fly ash from medical waste incineration, J. Hazard. Mater. 147 (2007) 652-657.

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

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

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