|
|||||
|
|
| MnO2吸附-氧化去除草甘膦的研究 | |
| 引用本文： | 兰华春,焦兆飞,赵旭,刘锐平,侯子义.MnO2吸附-氧化去除草甘膦的研究[J].环境科学学报,2013,33(8):2181-2186. |
| 作者姓名： | 兰华春 焦兆飞 赵旭 刘锐平 侯子义 |
| 作者单位： | 1. 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 2. 中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085;河北工业大学土木工程学院,天津300401 3. 河北工业大学土木工程学院,天津,300401 |
| 基金项目： | 国家自然科学基金，国家水体污染控制与治理科技重大专项，the National Natural Science Foundation of China，the Major Science and Technology Program for Water Pollution Control and Treatment |
| 摘 要： | 草甘膦是一种被广泛使用的除草剂,天然矿物的吸附-氧化作用对草甘膦的降解具有重要影响.本文研究了草甘膦在MnO2表面的吸附-氧化行为,考察了草甘膦在MnO2表面的降解动力学,以及反应体系pH和共存阳离子对MnO2吸附-氧化降解草甘膦的影响,初步分析了草甘膦的降解产物和可能的降解途径.结果表明,MnO2可有效降解草甘膦,草甘膦在MnO2表面的降解符合表观准一级动力学模型,表观反应动力学常数随草甘膦浓度的增大而减小;酸性条件有利于MnO2对草甘膦的去除,共存Cu2+对MnO2去除草甘膦有明显的抑制作用;草甘膦的降解产物包括肌氨酸、氨基乙酸、羟基乙酸、甲酸和乙酸及PO3-4、NH+4和NO-3. |
| 关 键 词： | 草甘膦 MnO 吸附-氧化 降解产物 降解途径 |
| 收稿时间： | 2012/11/5 0:00:00 |
| 修稿时间： | 2012/11/29 0:00:00 |
Removal of glyphosate by MnO2 adsorption-oxidation process |
|
| LAN Huachun,JIAO Zhaofei,ZHAO Xu,LIU Ruiping and HOU Ziyi.Removal of glyphosate by MnO2 adsorption-oxidation process[J].Acta Scientiae Circumstantiae,2013,33(8):2181-2186. | |
| Authors: | LAN Huachun JIAO Zhaofei ZHAO Xu LIU Ruiping and HOU Ziyi |
| Institution: | 1.State Key Laboratory of Environment Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085 2.College of Civil Engineering,Hebei University of Technology,Tianjin 300401 |
| Abstract: | Glyphosate is a widely used herbicide. Natural minerals play an important role in adsorption-oxidation processes for the degradation of glyphosate. This paper studies the glyphosate interaction and the MnO2 adsorption-oxidation behavior for glyphosate degradation. This investigation also included the kinetics and the effect of initial pH, coexisting cations for the MnO2 adsorption-oxidation process and preliminary analysis of the degradation products of glyphosate. The results showed that the process of glyphosate degradation could be simulated by first order kinetic model, and the kinetic constant decreased with the concentration increase. Acidic conditions also favored the removal of glyphosate, while coexisting Cu2+ inhibited activity. The primary degradation products of MnO2 adsorption-oxidation of glyphosate were sarcosine, glycine, glycolic acid, acetic acid, formic, PO43-, NH4+, and NO3-. |
| Keywords: | glyphosate MnO2 adsorption-oxidation degradation products degradation pathway |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《环境科学学报》浏览原始摘要信息 | |
| 点击此处可从《环境科学学报》下载免费的PDF全文 | |