title: Selective removal of cesium from aqueous solutions with nickel (II) hexacyanoferrate (III) functionalized agricultural residue-walnut shell.
abstract: A novel nickel (II) hexacyanoferrate (III) functionalized agricultural residue-walnut shell (Ni(II)HCF(III)-WS) was developed to selectively remove cesium ion (Cs(+)) from aqueous solutions. This paper showed the first integral study on Cs(+) removal behavior and waste reduction analysis by using biomass adsorption material. The results indicated that the removal process was rapid and reached saturation within 2h. As a special characteristic of Ni(II)HCF(III)-WS, acidic condition was preferred for Cs(+) removal, which was useful for extending the application scope of the prepared biomass material in treating acidic radioactive liquid waste. The newly developed Ni(II)HCF(III)-WS could selectively remove Cs(+) though the coexisting ions (Na(+) and K(+) in this study) exhibited negative effects. In addition, approximately 99.8% (in volume) of the liquid waste was reduced by using Ni(II)HCF(III)-WS and furthermore 91.9% (in volume) of the spent biomass material (Cs-Ni(II)HCF(III)-WS) was reduced after incineration (at 500°C for 2h). Due to its relatively high distribution coefficient and significant volume reduction, Ni(II)HCF(III)-WS is expected to be a promising material for Cs(+) removal in practice.
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan. Electronic address: dingdahu@gmail.com.
authors.forename: Dahu
authors.initials: D
authors.lastname: Ding
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Zhongfang
authors.initials: Z
authors.lastname: Lei
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Yang
authors.affiliation: School of Water Resources and Environment, China University of Geosciences (Beijing), Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education, Beijing 100083, China.
authors.forename: Chuanping
authors.initials: C
authors.lastname: Feng
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan. Electronic address: zhang.zhenya.fu@u.tsukuba.ac.jp.
authors.forename: Zhenya
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D000383:Agriculture; D002586:Cesium / Q000737:chemistry*; D005295:Ferrocyanides / Q000737:chemistry*; D017745:Incineration; D031324:Juglans; D009532:Nickel / Q000737:chemistry*; D012996:Solutions; D014866:Waste Products; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D005295:Ferrocyanides; D012996:Solutions; D014866:Waste Products; D014874:Water Pollutants, Chemical; C027325:nickel ferrocyanide; D002586:Cesium; D009532:Nickel
keywords: Cesium; Nickel (II) hexacyanoferrate (III); Selectivity; Volume reduction; Walnut shell