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| Dechlorination and detoxication of pesticides and chlorine salt enrichment using molten NaOH-KOH |
| ZHAO You-cai1,2, DAI Shi-jin1, ZHENG Yi-lin1, LI Qiang3, WANG Yun-xue4, YAN Zhen-hui5, WU Qi-fang6, YANG Ying-sheng6, LING Jin-ming7, WANG Yan-ming8, NIU Dong-jie1,2 |
1. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China;
3. China Everbright Greentech Management Limited, Shenzhen 518040, China;
4. Rizhao Zili Environmental Protection Technology Co., LTD, Rizhao 276800, China;
5. Shanghai Solid Waste Disposal Center, Shanghai 201815, China;
6. Shanghai Tianhan Environmental Resources Co., LTD, Shanghai 201112, China;
7. Beijing GeoEnviron Engineering & Technology, Inc, Beijing 100095, China;
8. Shanghai Municipal Engineering Design & Research Institute Co., Ltd, Shanghai 200092, China |
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Abstract In this paper, molten NaOH-KOH mixture was selected as the medium for the destruction of pesticides, with the 2,4-dichlorophenol as an example. The effect of temperature, hydroxide amount and reaction time were investigated. The equal molal weight showed a best dechlorination rate and the increased temperature as well as hydroxide amount can promoted the dechlorination reaction. When the temperature of 200℃, reaction time of 180min and hydroxide amount of 20g, the dechlorination efficiency acquired 80.1%. The FTIR spectra demonstrated the cleavage of benzene ring and C-Cl bond, leading to the generation of intermediate products. Gases like HCl was restrained by the molten salt medium to form chlorine salt, according to the XRD patterns.
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Received: 02 March 2018
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| [1] |
耿飞,刘晓军,马俊逸,等.危险固体废弃物无害化处置技术探讨[J]. 环境科技, 2017,30(1):71-74.
|
| [2] |
再协.2016年中国危险废物处理行业发展现状分析[J]. 中国资源综合利用, 2016,34(6):9-10.
|
| [3] |
曲晴.新《国家危险废物名录》实施在即推进危险废物管理[J]. 环境教育, 2008,(7):54-57.
|
| [4] |
危险废物处理处置技术[J]. 中国科技成果, 2007,(8):57-57.
|
| [5] |
Phd Thomas T Shen,金永铮.危险品废物的焚烧、排放和处理[J]. 环境保护科学, 1988,(2):60-63.
|
| [6] |
Lin C, Chi Y, Jin Y, et al. Molten salt oxidation of organic hazardous waste with high salt content[J]. Waste Manag Res., 2018,36(2):140-148.
|
| [7] |
薛元德.回转窑焚烧系统在危险废物处理中的应用[J]. 化工管理, 2017,(3).
|
| [8] |
文柏鸣.水泥窑协同处置废物系统集成化研究[J]. 水泥, 2017,(3):18-22.
|
| [9] |
中财网.水泥窑协同处置危废:协同处置优势显著[J]. 居业, 2016, (9):23-23.
|
| [10] |
Yao Zhitong, Li Jinhui, Zhao Xiangyang. Molten salt oxidation:A versatile and promising technology for the destruction of organic-containing wastes[J]. Chemosphere, 2011,84(9):1167-1174.
|
| [11] |
谢刚.熔融盐理论与应用[M]. 北京:冶金工业出版社, 1998.
|
| [12] |
Takata Mitsuyasu, Watanabe Nobuhisa, Yamamoto Shuhsaku. Destruction of organic Cl and Br compounds through incineration enhanced by alkali and alumina addition[J]. Journal of Material Cycles and Waste Management, 2015,17(2):282-289.
|
| [13] |
Sun Z, Wei X, Han Y, et al. Complete dechlorination of 2,4-dichlorophenol in aqueous solution on palladium/polymeric pyrrole-cetyl trimethyl ammonium bromide/foam-nickel composite electrode[J]. J Hazard Mater, 2013,244-245(2):287.
|
| [14] |
Janz George J. Molten salts handbook[M]. Elsevier, 2013.
|
| [15] |
Lin Chengqian, Chi Yong, Jin Yuqi, et al. Experimental Study on Molten Salt Oxidation of High Salt Content Pharmaceutical Residue[J]. Procedia Environmental Sciences, 2016,31:335-344.
|
| [16] |
Takanabe K, Khan A M, Tang Y, et al. Integrated in situ characterization of molten salt catalyst surface:Evidence of sodium peroxide and OH radical formation[Z]. Angew, Chem., 2017.
|
| [17] |
Stuhlpfarrer P, Luidold S, Antrekowitsch H. Recycling of waste printed circuit boards with simultaneous enrichment of special metals by using alkaline melts:A green and strategically advantageous solution[J]. J Hazard Mater, 2016,307:17-25.
|
| [18] |
Woo O S, Ayala N, Broadbelt L J. Mechanistic interpretation of base-catalyzed depolymerization of polystyrene[J]. Catal Today, 2000,55(1/2):161-171.
|
| [19] |
Li Jin-Hui, Sun Xiao-Fei, Yao Zhi-Tong, et al. Remediation of 1, 2, 3-trichlorobenzene contaminated soil using a combined thermal desorption-molten salt oxidation reactor system[J]. Chemosphere, 2014,97:125-129.
|
| [20] |
肖叶,蒋建国,杨勇,等.六氯苯碱催化分解脱氯效果及影响因素研究[J]. 中国环境科学, 2012,32(12):2213-2218.
|
| [21] |
Yamauchi Y, Takeda O, Hoshi M, et al. Decomposition of carbon tetrachloride and mono-Chlorobenzen by using basic molten salts[J]. Electrochemistry, 2012,80(12):974-979.
|
| [22] |
Zhao Peitao, Li Tian, Yan Weijie, et al. Dechlorination of PVC wastes by hydrothermal treatment using alkaline additives[J]. Environ. Technol., 2018,39(8):977-985.
|
| [23] |
Yang Hee-Chul, Cho Yong-June, Eun Hee-Chul, et al. Destruction of chlorinated organic solvents in a two-stage molten salt oxidation reactor system[J]. Chem. Eng. Sci., 2007,62(18/20):5137-5143.
|
| [24] |
李飞,赵增立,李海滨,等.电子废物塑料熔融盐气化特性研究[J]. 燃烧科学与技术, 2005,(5):86-90.
|
| [25] |
Griffiths Trevor R, Volkovich Vladimir A, Anghel Elena M, et al. Molten salt oxidation for the efficient destruction of radioactive, hazardous chemical, medical waste and munitions[C]//proceedings of the 24th International Conference on Incineration and Thermal Treatment Technologies, Galveston, Texas, F, 2005.
|
| [26] |
Griffiths T R, Volkovich V A, Carper W R. CEMSO (Catalyst Enhanced Molten Salt Oxidation) for complete and continuous pyrochemical reprocessing of spent nuclear fuel:an overview of a viable new technology for next generation nuclear reactors[J]. ECS Trans., 2007,3(35):467-482.
|
|
|
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