| 碘化阶层孔氧化硅纳米球对水中典型有机氯污染物的吸附性能研究 |
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| 引用本文： | 贾荫楠,杨明庆,田华,贺军辉,冯利利.碘化阶层孔氧化硅纳米球对水中典型有机氯污染物的吸附性能研究[J].环境科学学报,2020,40(3):976-985. |
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| 作者姓名： | 贾荫楠 杨明庆 田华 贺军辉 冯利利 |
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| 作者单位： | 中国科学院理化技术研究所,中国科学院光化学转换与功能材料重点实验室,微纳材料与技术研究中心,功能纳米材料实验室,北京100190;中国矿业大学(北京),化学与环境工程学院,北京100083,北京信息科技大学,仪器科学与光电工程学院,北京100192,中国科学院理化技术研究所,中国科学院光化学转换与功能材料重点实验室,微纳材料与技术研究中心,功能纳米材料实验室,北京100190,中国科学院理化技术研究所,中国科学院光化学转换与功能材料重点实验室,微纳材料与技术研究中心,功能纳米材料实验室,北京100190,中国矿业大学(北京),化学与环境工程学院,北京100083 |
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| 基金项目： | 国家重点研发计划项目（No.2017YFA0207102）；国家自然科学基金资助项目（No.21271177，21607158，21571182）；中国科学院光化学转换与功能材料重点实验室 |
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| 摘 要： | 采用共缩聚法，成功地原位合成了碘改性的阶层多孔氧化硅纳米球（SiO2-I），研究了其基于卤键作用对典型有机氯污染物六六六的吸附性能，并考察了改性剂I-硅烷含量和pH值对吸附效果的影响.实验结果表明，该纳米材料对六六六表现出优异的吸附富集性能，吸附速率快，60 min内对六六六的去除率为71.6%，240 min内达到吸附平衡，去除率可达98.3%，最大吸附量为178.6 mg·g-1；吸附动力学符合拟二级动力学模型；碘物种的加入提高了阶层多孔氧化硅的吸附速率和吸附效率.另外，为了便于纳米吸附材料的分离，本研究对SiO2-I纳米球进行了磁性化.研究发现，磁性化修饰后，SiO2-I纳米材料仍然保留对六六六优异的吸附富集性能，240 min时的吸附去除率达90.3%.
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| 关 键 词： | 有机氯污染物 吸附 卤键 二氧化硅 阶层孔 |
| 收稿时间： | 2019/7/26 0:00:00 |
| 修稿时间： | 2019/12/23 0:00:00 |
Highly efficient removal of organochlorine pollutants from aqueous solution by hierarchically porous silica nanospheres functionalized with iodine |
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| JIA Yinnan,YANG Mingqing,TIAN Hu,HE Junhui and FENG Lili.Highly efficient removal of organochlorine pollutants from aqueous solution by hierarchically porous silica nanospheres functionalized with iodine[J].Acta Scientiae Circumstantiae,2020,40(3):976-985. |
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| Authors: | JIA Yinnan YANG Mingqing TIAN Hu HE Junhui and FENG Lili |
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| Institution: | 1. Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials Laboratory, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;2. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083,School of Instrument Science and Opto Electronics Engineering, Beijing Information Science&Technology University, Beijing 100192,Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials Laboratory, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190,Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials Laboratory, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 and School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083 |
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| Abstract: | In this study, hierarchically porous iodine-functionalized silica nanospheres(SiO2-I)were successfully synthesized by an in-situ copolycondensation method, and served as adsorbent materials for the removal of hexachlorocyclohexane(HCH)from aqueous solution. Effects of I-silane content and pH on the removal efficiency were investigated. The experimental results indicate the superior efficiency of SiO2-I for highly efficient and rapid removal of HCH. The adsorption is rapid, showing 71.6% removal of HCH in 1 h, and 98.3% removal in 8 h. The maximum adsorption capacity was calculated to be 178.6 mg·g-1. The adsorption process fits well with the pseudo-second-order kinetic model. It has been confirmed that the introduction of iodine species led to the enhanced adsorption performance of porous silica nanospheres towards HCH. In addition, magnetic SiO2-I composites(Fe3O4@SiO2-I)were also synthesized for the convenient separation of adsorbents from aqueous solution. The adsorption experiments demonstrated the excellent adsorption performance of Fe3O4@SiO2-I for HCH uptake, 90.3% of HCH could be captured in 4 h. More importantly, these Fe3O4@SiO2-I composites could be rapidly separated and collected using magnet. |
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| Keywords: | organochlorine pollutant adsorption halogen bonding silica hierarchical pore |
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