Preparation and uranium (VI) biosorption for tri-amidoxime modified marine fungus material
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ENVIRONMENTAL TOXICOLOGY AND BIOGEOCHEMISTRY OF ECOSYSTEMS
Preparation and uranium (VI) biosorption for tri-amidoxime modified marine fungus material Jingwen Han 1 & Lin Hu 1 & Leqing He 1 & Kang Ji 1 & Yaqing Liu 1 & Can Chen 1 & Xiaomei Luo 1 & Ni Tan 1 Received: 11 September 2019 / Accepted: 14 January 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The preparation, characterization, and uranium (VI) adsorption properties of tri-amidoxime modified marine fungus material (ZZF51-GPTS-EDA-AM/ZGEA) were investigated in this study. ZGEA was synthesized by four steps of condensation, nucleophilic substitution, electrophilic addition, and nitrile amidoxime and characterized by a series of methods containing FT-IR, TGA, SEM, and BET. Contrasted with uranium (VI) adsorption capacity of original fungus mycelium (15.46 mg g−1) that of the functional material (584.60 mg g−1) was great under the optimal factors such as uranium (VI) ion concentration 40 mg L−1, solidliquid ratio 50 mg L−1, pH of solution 5.5, and reaction time 120 min. The above data were obtained by the orthogonal method. The cyclic tests showed that ZGEA had good regeneration performance, and it could be recycled at least five adsorptiondesorption processes. The thermodynamic experimental adsorption result fitted Langmuir and Freundlich models, which explored monolayer and double layers of uranium (VI) adsorption mechanism, and the kinetic adsorption results were in better consistent with the pseudo-second-order and pseudo-first-order dynamic models (R2 > 0.999). Keywords Tri-amidoxime group . Functional . Marine fungus . Biosorption . Optimum design . Uranium (VI)
Introduction As a new energy in the twenty-first century, nuclear energy has many advantages such as high efficiency, reliability, low cost, and less greenhouse gas emission compared with traditional energy (Asif and Muneer 2007, Dittmar 2012). Recently, with the further development of nuclear energy, the treatment of nuclear waste and waste water has become a big problem (Bergmann et al. 2018). Usually, uranium enrichment in mammals can cause medulla malnutrition, immune system disorder, and liver and kidney function damage, so it is very important to develop new effective uranium contaminated water remediation agents (Pavlakis et al. 1996). Over the past decades, many methods have been deployed to remove uranium (VI) including chemical coprecipitation, solvent extraction (Chen et al. 2009, Responsible editor: Tito Roberto Cadaval Jr * Ni Tan [email protected] 1
School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan Province, People’s Republic of China
Vasconcelos et al. 2007), infiltration (Zhao et al. 2016), retrorse osmosis (Yakout and Hassan 2014), vaporization, leach, ion swap, adsorption, and photocatalytic reduction (Awual 2016a, Yao et al. 2016). For the adsorption of uranium (VI), various modified adsorbents such as ligand-based inorganic nanomaterials (Awual 2016b, Zhu et al. 2018), metal organic frameworks (Sun et
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