title: Modifying Fe3O4 microspheres with rhodamine hydrazide for selective detection and removal of Hg2+ ion in water.
abstract: Rhodamine hydrazide modifying Fe(3)O(4) microspheres (Fe(3)O(4)-R6G) was developed for selective detection and removal of mercury ion from water. With a saturation magnetization of 74.2 emu/g, the Fe(3)O(4)-R6G could be simply recollected from water with magnetic separation within a few minutes. The selectivity and adsorption ability of Fe(3)O(4)-R6G for metal cations were studied by fluorophotometry and atomic absorption spectrometry, respectively. The results showed that Fe(3)O(4)-R6G exhibited excellent selectivity for sensing mercury ion over other metal ions in aqueous solution, and also adsorbed 91% of mercury ion. The maximum adsorption capacity of the Fe(3)O(4)-R6G for Hg(2+) ion was 37.4 μmol g(-1). The Fe(3)O(4)-R6G was successfully applied to the determination of Hg(2+) in environmental samples, and could be used repeatedly by treatment with tetrabutylammonium hydroxide.
authors.affiliation: Division of Functional Materials and Nano Devices, Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo 315201, Zhejiang, China.
authors.forename: Zhuqing
authors.initials: Z
authors.lastname: Wang
authors.forename: Dayu
authors.initials: D
authors.lastname: Wu
authors.forename: Genhua
authors.initials: G
authors.lastname: Wu
authors.forename: Ningning
authors.initials: N
authors.lastname: Yang
authors.forename: Aiguo
authors.initials: A
authors.lastname: Wu
mesh_terms: D000327:Adsorption; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry*; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D008863:Microspheres; D012235:Rhodamines / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D006834:Hydrazines; D012235:Rhodamines; D014874:Water Pollutants, Chemical; D008628:Mercury; D052203:Ferrosoferric Oxide