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| MIL-101(Fe)对草甘膦的吸附行为研究 |
| Adsorption of glyphosate by MIL-101(Fe) |
| 投稿时间：2018-09-18 |
| DOI： |
| 中文关键词: MIL-101(Fe) 草甘膦 吸附行为 等温吸附 吸附动力学 吸附热力学 |
| 英文关键词: MIL-101(Fe) glyphosate adsorption behavior isothermal adsorption adsorption kinetics adsorption thermodynamics |
| 基金项目:湖北省自然科学基金资助项目(2015CFB550). |
| 作者 | 单位 | E-mail | | 蒋实 | 中南民族大学资源与环境学院,湖北 武汉,430074 | 3768479@qq.com | | 黄芳 | 黄石市环境保护研究所,湖北 黄石,435003 | | | 林晓宇 | 中南民族大学资源与环境学院,湖北 武汉,430074 | | | 吴桂萍 | 中南民族大学资源与环境学院,湖北 武汉,430074 | | | 崔龙哲 | 中南民族大学资源与环境学院,湖北 武汉,430074 | |
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| 中文摘要: |
| 采用溶剂热法制备MIL-101(Fe)用作吸附材料,借助XRD、SEM 、XPS及氮气吸脱附测试对所制材料的形貌及结构进行表征,研究了溶液pH值、反应时间、溶液浓度以及温度对其吸附草甘膦行为的影响。结果表明,当 pH为3时,MIL-101(Fe)对草甘膦的吸附效果最佳,且随着温度的升高,MIL-101(Fe)对草甘膦的吸附速率明显增加,吸附过程符合拟二级动力学,等温吸附实验数据符合Langmuir和Temkin模型。MIL-101(Fe)吸附草甘膦属自发吸热的化学吸附反应,MIL-101(Fe)的中心金属Fe与草甘膦中O的配位在吸附过程中起主要作用。 |
| 英文摘要: |
| MIL-101(Fe) were prepared by solvothermal method and used as adsorption materials. The structure and morphology of the samples were characterized by XRD,SEM,XPS and N2 adsorption-desorption isotherms, and the effects of pH, reaction time, concentration and temperature on the adsorption of GP by MIL-101(Fe) were investigated. The results show that MIL-101(Fe)materials manifest the best adsorption properties under pH value of 3, and the adsorption rate of GP by MIL-101(Fe) increases significantly with the increase of temperature. The adsorption process conforms with the pseudo-second-order kinetics, and isothermal adsorption test data are compliant with the Langmuir and Temkin isotherm models. The adsorption of GP on MIL- 101(Fe) is spontaneous and endothermic, and the coordination between the Fe(Ⅲ) of MIL-101 (Fe) and the oxygen from GP dominates the adsorption process. |
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