Interaction of polyhydroxy fullerenes with ferrihydrite:adsorption and aggregation

查看全文 作　　者：Jing [1,2]Liu;Runliang [1]Zhu;Tianyuan [1,2]Xu;Mingwang [1,2]Laipan;Yanping [1,2]Zhu;Qing [1,2]Zhou;Jianxi [1]Zhu;Hongping [1,2]He

机构地区：[1]Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Mineral Physics and Material Research & Development, Guangzhou 510640, China;[2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Environmental Sciences》索引2018年第30卷第2期,共9页

基　　金：supported by the National Natural Science Foundation of China(No.41572031);the National Program for Support of Top-notch Young Professionals,Guangdong Provincial Youth Top-notch Talent Support Program(No.2014TQ01Z249);the Newton Advanced Fellowship Through the Royal Society in the United Kingdom(No.NA150190);the National Key Research and Development Plan(No.2016YFD0800700) 摘　　要：The rapid development of nanoscience and nanotechnology, with thousands types of nanomaterials being produced, will lead to various environmental impacts. Thus,understanding the behaviors and fate of these nanomaterials is essential. This study focused on the interaction between polyhydroxy fullerenes(PHF) and ferrihydrite(Fh), a widespread iron(oxyhydr)oxide nanomineral and geosorbent. Our results showed that PHF were effectively adsorbed by Fh. The adsorption isotherm fitted the D-R model well, with an adsorption capacity of 67.1 mg/g. The adsorption mean free energy of 10.72 k J/mol suggested that PHF were chemisorbed on Fh. An increase in the solution p H and a decrease of the Fh surface zeta potential were observed after the adsorption of PHF on Fh; moreover, increasing initial solution p H led to a reduction of adsorption. The Fourier transform infrared spectra detected a red shift of C–O stretching from 1075 to 1062 cm-1 and a decrease of Fe–O bending, implying the interaction between PHF oxygenic functional groups and Fh surface hydroxyls. On the other hand, PHF affected the aggregation and reactivity of Fh by changing its surface physicochemical properties. Aggregation of PHF and Fh with individual particle sizes increasing from 2 nm to larger than 5 nm was measured by atomic force microscopy. The uniform distribution of C and Fe suggested that the aggregates of Fh were possibly bridged by PHF. Our results indicated that the interaction between PHF and Fh could evidently influence the migration of PHF, as well as the aggregation and reactivity of Fh. 关键词：FULLERENES 相互作用能聚集吸附等温线 FOURIER 纳米技术环境影响吸附能力

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Interaction of polyhydroxy fullerenes with ferrihydrite:adsorption and aggregation

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