Co/Bi催化剂催化湿法氧化降解垃圾渗滤液中的氨氮

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (3): 430.

Co/Bi催化剂催化湿法氧化降解垃圾渗滤液中的氨氮

李鱼¹, 张荣¹, 李海生², 董德明¹, 刘亮¹, 刘光辉¹, 刘鸿亮²

1. 吉林大学环境与资源学院,长春 130023;
2. 北京化工大学化学化工学院,北京 100029

收稿日期:2004-03-29 出版日期:2005-03-10 发布日期:2005-03-10
通讯作者: 李　鱼(1965年出生),男,博士,副教授.主要从事环境污染与控制化学、环境规划与评价、环境污染物形态研究.E-mail:liyuxx@mai.ljlu.edu.cn E-mail:liyuxx@mai.ljlu.edu.cn
基金资助:
国家环保总局环境工程评估中心基金(批准号:02220100000549);吉林省环境保护补助资金(批准号:20022025)资助.

Catalytic Wet Air Oxidation of Ammonia in Landfill Leachates in the Presence of Co/Bi Catalyst

LI Yu¹, ZHANG Rong¹, LI Hai-Sheng², DONG De-Ming¹, LIU Liang¹, LIU Guang-Hui¹, LIU Hong-Liang²

1. College of Environment and Resources, Jilin University, Changchun 130023, China;
2. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2004-03-29 Online:2005-03-10 Published:2005-03-10

摘要/Abstract

摘要： 采用催化湿法氧化(CWAO)技术,以Co/Bi为催化剂,对垃圾渗滤液中氨氮(NH₃-N)进行降解处理,并利用GC-MS检测了垃圾渗滤液中含氮有机物的相对含量.结果表明,随着反应温度的升高,CWAO对NH₃-N的降解能力逐渐增强,在220,240,260和280℃条件下,NH₃-N降解规律符合一级动力学反应(r>0.93,n=6).在升温过程(20～300℃)中,NH₃-N浓度变化经历了先升后降两个阶段,并在220℃时达到最大值.GC-MS检测结果表明,在第一阶段,垃圾渗滤液中几种含氮有机物因催化氧化而生成NH₃-N;第二阶段,NH₃-N逐渐被氧化降解,达到了CWAO技术同时降解有机物和NH₃-N的目的.同时,选取垃圾渗滤液中一种含氮有机物2-巯基苯并噻唑进行含氮有机物氮降解机理的验证实验.

关键词: 催化湿法氧化, 垃圾渗滤液, 氨氮, Co/Bi

Abstract: Catalytic Wet Air Oxidation(CWAO) was used for the decomposition of ammonia(NH₃-N) from the landfill leachates in the presence of Co/Bi catalyst and the relative content of nitrogenous organic compounds in the landfill leachates was also measured by GC-MS. The results show that the decomposition ability of NH₃-N by CWAO gradually increased with increasing reaction temperature. The kinetic decomposition of NH₃-N at temperatures 220, 240, 260 and 280 ℃ was well described with the first-order kinetics model(r>0.93, n=6). During the overall process of temperature rising(20—300 ℃), the concentration of NH₃-N increased in the first stage and then decreased in the second stage, which culminated at 220 ℃. Further investigations by GC-MS indicated that during the first stage, some nitrogenous organic compounds in the landfill leachates were degraded into NH₃-N by CWAO, and then NH₃-N was degraded by CWAO during the second stage, which presented the advantage of simultaneous removal of both NH₃-N and organic compounds by CWAO. One of the nitrogen-organic compounds, 2-mercaptobenzothiazole, in the landfill leachates was selected to verify the degradation of the nitrogen-organic compounds.

Key words: Catalytic wet air oxidation, Landfill leachates, Ammonia-nitrogen, Co/Bi

中图分类号:

X13112
X703

TrendMD:

李鱼, 张荣, 李海生, 董德明, 刘亮, 刘光辉, 刘鸿亮. Co/Bi催化剂催化湿法氧化降解垃圾渗滤液中的氨氮. 高等学校化学学报, 2005, 26(3): 430.

LI Yu, ZHANG Rong, LI Hai-Sheng, DONG De-Ming, LIU Liang, LIU Guang-Hui, LIU Hong-Liang . Catalytic Wet Air Oxidation of Ammonia in Landfill Leachates in the Presence of Co/Bi Catalyst. Chem. J. Chinese Universities, 2005, 26(3): 430.

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