title: Immobilization of uranium by biomaterial stabilized FeS nanoparticles: Effects of stabilizer and enrichment mechanism.
abstract: Iron sulfide (FeS) nanoparticles have been recognized as effective scavengers for multi-valent metal ions. However, the aggregation of FeS nanoparticles in aqueous solution greatly restricts their application in real work. Herein, different biomaterial-FeS nanoparticles were developed for the in-situ immobilization of uranium(VI) in radioactive waste management. TEM images suggested that sodium carboxymethyl cellulose (CMC) and gelatin can effectively suppress the aggregation of FeS nanoparticles in aqueous solutions. The resulting CMC-FeS and gelatin-FeS were stable in aqueous solutions and showed high adsorption capacity for U(VI). Specially, gelatin-FeS showed the best performance in U(VI) adsorption-reduction immobilization under experimental conditions. The maximum enrichment capacity of U(VI) on CMC-FeS and gelatin-FeS at pH 5.0 and 20 °C achieved to ∼430 and ∼556 mg/g, respectively. Additionally, gelatin-FeS and CMC-FeS nanoparticles presented excellent tolerance to environmental salinity. The immobilized U(VI) on the surfaces of CMC-FeS and gelatin-FeS remained stable more than one year. These findings highlight the possibility of using ggelatin-FeS for efficient immobilization of U(VI) from radioactive wastewater.
authors.affiliation: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China.
authors.forename: Dadong
authors.initials: D
authors.lastname: Shao
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China. Electronic address: renxm_nana@163.com.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Ren
authors.affiliation: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wen
authors.affiliation: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Hu
authors.affiliation: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Xiong
authors.affiliation: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.affiliation: China Academy of Engineering Physics, Mianyang 621900, PR China. Electronic address: xlwang@caep.ac.cn.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China. Electronic address: xkwang@ncepu.edu.cn.
authors.forename: Xiangke
authors.initials: X
authors.lastname: Wang
mesh_terms: D000818:Animals; D018533:Biomass; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry; D002417:Cattle; D003505:Cyclodextrins / Q000737:chemistry; D005296:Ferrous Compounds / Q000737:chemistry*; D005780:Gelatin / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010461:Peptones / Q000737:chemistry; D054712:Salinity; D013816:Thermodynamics; D014020:Tissue Extracts / Q000737:chemistry; D014501:Uranium / Q000737:chemistry*; D014875:Water Pollutants, Radioactive / Q000737:chemistry*; D015003:Yeasts
chemical_list: D003505:Cyclodextrins; D005296:Ferrous Compounds; D010461:Peptones; D014020:Tissue Extracts; D014875:Water Pollutants, Radioactive; D014501:Uranium; D005780:Gelatin; D005947:Glucose; D002266:Carboxymethylcellulose Sodium; C022597:ferrous sulfide
keywords: Biomaterial; Immobilization mechanisms; Radioactive wastewater; Stabilized FeS; Uranium