Removal of strontium by high-performance adsorbents Saccharomyces cerevisiae -Fe 3 O 4 bio-microcomposites
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Removal of strontium by high‑performance adsorbents Saccharomyces cerevisiae‑Fe3O4 bio‑microcomposites Jundong Feng1 · Xida Zhao1 · Hao Zhou1 · Liang Qiu1 · Yaodong Dai1 · Huiyao Luo1 · Marta Otero2 Received: 7 May 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In this paper, we produced Saccharomyces cerevisiae (S. cerevisiae)-Fe3O4 (S@F) by a low-cost and self-assembly technique called the one-step method. The results of SEM and XRD showed that nano-Fe3O4 particles had successfully attached to the surface of S. cerevisiae and the results of TEM indicted that nano-Fe3O4 particles had a uniform core–shell structure to the composite S. cerevisiae with a magnetic core. The results of FTIR showed that nano-Fe3O4 particles were mainly combined with S. cerevisiae through chemical bonds. Meanwhile, the VSM analysis and SBET results reflected that S@F had a good magnetization and big surface area. Strontium ion sorption of S@F was independent of ionic concentration and pH, indicating that the complexion and electrostatic attraction dominated the sorption. Besides, the results of VSM analysis and S BET reflected that S@F had good magnetization and large surface area, and we found that the adsorption capacity of S@F for strontium ions was independent of ion concentration and pH, which indicated that complexation and electrostatic attraction played a dominant role in the adsorption process. S@F needed 16 h to get the maximum from our pseudo-second-order kinetic study analysis and The maximum adsorption capacity of S@F calculated by the Langmuir isotherm model is 20.47 mg g−1. Moreover, whether it is in a single working condition, in simulated low-level wastewater or a radiation environment, S@F always has good regeneration ability and reusable performance (after three cycles, S@F almost maintains the same adsorption capacity). In summary, these findings indicate that S@F can be a renewable material for nuclear wastewater treatment. Keywords Saccharomyces cerevisiae · Nano-Fe3O4 · Bio-micro-composites · Strontium ion · Sorption
Introduction With the development of nuclear technology, the treatment of radionuclide contamination has become a common concern of nuclear waste management facilities, uranium mining and nuclear power wastewater [1]. Among these radionuclides, strontium isotopes such as 90Sr or 89Sr are one of the most dangerous radioactive pollutants in the environment, which can cause extensive environmental pollution and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10967-020-07339-7) contains supplementary material, which is available to authorized users. * Jundong Feng [email protected] 1
Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Department of Environment and Planning, CESAM, Campus Universitário de Santiago, 3810‑193 Aveiro, Portugal
2
pose a serious threat to human health [2]. The removal of Strontium by adsorbents such as sepiol
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