铜在壳核结构磁性颗粒上的吸附:效能与表面性质的关系
李秋梅; 陈静; 李海宁; 张晓蕾; 张高生
刊名环境科学
2015-11-20
卷号36期号:12页码:4531-4538
关键词壳核结构 磁性颗粒 吸附效能 表面性质
ISSN号0250-3301
其他题名Adsorption of Cu on Core-shell Structured Magnetic Particles: Relationship Between Adsorption Performance and Surface Properties
通讯作者陈静,中国科学院烟台海岸带研究所,海岸带环境过程与生态修复重点实验室,E-mail: jchen@yic.ac. cn ; 张高生 ,中国科学院烟台海岸带研究所,海岸带环境过程与生态修复重点实验室gszhang@yic.ac.cn
产权排序烟台大学海洋学院;中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室;烟台大学环境与材料工程学院;
中文摘要为了揭示吸附剂的吸附效能与其组成、结构及表面性质之间的关系,本研究对两种壳核结构磁性颗粒Fe_3O_4/Mn O2与Fe-Mn/Mn O2的形貌特征、表面性质进行了系统表征,并对铜在磁性颗粒表面的吸附行为与机制进行了详细研究.表征结果表明磁核Fe_3O_4与Fe-Mn具有相似的尖晶石类晶体结构,包覆Mn O2后,晶体结构均未发生明显变化.但Mn的引入,增强了磁核与外壳间的结合作用,Fe-Mn比Fe_3O_4包覆MnO_2的量更多、更均匀,进而使Fe-Mn/Mn O2具有更高的比表面积与更低的等电点.吸附实验结果表明,Fe-Mn的最大铜吸附容量33.7 mg·g-1(pH 5.5)高于Fe_3O...
英文摘要: In order to reveal the relationship between the adsorption performance of adsorbents and their compositions,structure,and surface properties,the core-shell structured Fe3O4 /MnO2 and Fe-Mn/MnO2 magnetic particles were systematically characterized using multiple techniques and their Cu adsorption behaviors as well as mechanism were also investigated in details. It was found that both Fe3O4 and Fe-Mn had spinel structure and no obvious crystalline phase change was observed after coating with MnO2 . The introduction of Mn might improve the affinity between the core and the shell,and therefore enhanced the amount and distribution uniformity of the MnO2 coated. Consequently,Fe-Mn/MnO2 exhibited a higher BET specific surface area and a lower isoelectric point. The results of sorption experiments showed that Fe-Mn had a higher maximal Cu adsorption capacity of 33. 7 mg·g - 1 at pH 5. 5,compared with 17. 5 mg·g - 1 of Fe3O4 . After coating,the maximal adsorption capacity of Fe-Mn/MnO2 was increased to 58. 2 mg·g - 1,which was 2. 6 times as high as that of Fe3O4 /MnO2 and outperformed the majority of magnetic adsorbents reported in literature. In addition,a specific adsorption of Cu occurred at the surface of Fe3O4 /MnO2 or Fe-Mn/MnO2 through the formation of inner-sphere complexes. In conclusion,the adsorption performance of the magnetic particles was positively related to their compositions,structure,and surface properties.
收录类别CSCD
语种中文
CSCD记录号CSCD:5583624
内容类型期刊论文
源URL[http://ir.yic.ac.cn/handle/133337/17357]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_污染过程与控制实验室
作者单位1.烟台大学海洋学院
2.中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室
3.烟台大学环境与材料工程学院
推荐引用方式
GB/T 7714
李秋梅,陈静,李海宁,等. 铜在壳核结构磁性颗粒上的吸附:效能与表面性质的关系[J]. 环境科学,2015,36(12):4531-4538.
APA 李秋梅,陈静,李海宁,张晓蕾,&张高生.(2015).铜在壳核结构磁性颗粒上的吸附:效能与表面性质的关系.环境科学,36(12),4531-4538.
MLA 李秋梅,et al."铜在壳核结构磁性颗粒上的吸附:效能与表面性质的关系".环境科学 36.12(2015):4531-4538.
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