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applied sciencesArticleRemoval of Cesium from Radioactive Waste Liquids Employing GeomaterialsHaixin Zhang 1 , Mingze Zhu 1 , Xiaoyu Du 1,two , Sihan Feng 1,three , Naoto Miyamoto four and Naoki Kano 4, 3Graduate College of Science and Technology, Niigata N-tert-Butyl-α-phenylnitrone medchemexpress University, 8050 Ikarashi 2Nocho, Nishiku, Niigata 9502181, Japan; [email protected] (H.Z.); [email protected] (M.Z.); [email protected] (X.D.); [email protected] (S.F.) Heilongjiang Provincial Essential Laboratory of Surface Active Agent and Auxiliary, Qiqihar University, Qiqihar 161006, China Daqing Petrochemical Research Center, two Chengxiang Road, Yixi, Longfeng District, Daqing 163311, China Division of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University, 8050 Ikarashi 2Nocho, Nishiku, Niigata 9502181, Japan; [email protected] Correspondence: [email protected]; Tel.: 81025262Citation: Zhang, H.; Zhu, M.; Du, X.; Feng, S.; Miyamoto, N.; Kano, N. Removal of Cesium from Radioactive Waste Liquids Utilizing Geomaterials. Appl. Sci. 2021, 11, 8407. https:// doi.org/10.3390/app11188407 Academic Editor: Dibyendu Sarkar Received: 16 August 2021 Accepted: 8 September 2021 Published: 10 SeptemberAbstract: Within this study, we investigated the removal of Cs from aqueous options working with geomaterials. Adsorption was selected as an efficient approach to develop for the removal of Cs from radioactive waste liquids. Geomaterials, such as fly ash and slag as raw materials, had been prepared as adsorbents employing an alkali activator. The components have been characterized by Xray diffraction (XRD); scanning electron microscopy with power dispersive spectrometer (SEMEDS); and BET surface area, pore volume, and pore size evaluation. The effects of numerous parameters, which include pH, speak to time, and adsorbent dosage around the adsorption of your Cs have been studied. The partition coefficient (Computer) at the same time as the adsorption capacity have been evaluated to assess the correct efficiency from the adsorbent within this work. The fly ashbased geomaterials showed a maximum Cs adsorption capacity of 89.32 mg 1 as well as a higher Pc of 31.02 mg 1 M1 for the Cs beneath our experimental circumstances. From this perform, this process is often regarded getting sensible for use as a prospective adsorbent for treating Cs in wastewater. Additionally, the immobilization of Cs in geomaterials was explored from a chemical viewpoint. In conclusion, fly ashbased geomaterials can be a promising choice for the therapy and disposal of nuclearcontaminated waste. Key phrases: cesium (Cs); radioactive waste liquid; fly ash; geomaterials; adsorption capacity; partition coefficient1. Introduction Using the MST-312 site improvement of modern day science and technology, nuclear energy has been extensively applied in market, national defense, agriculture, medicine, and scientific analysis. However, radioactive waste liquid has been created together with the rapid improvement in the nuclear industry. One example is, due to the Fukushima Daiichi nuclear power plant accident in Japan in 2011, a important amount of radioactive material leaked, and also a substantial volume of wastewater containing radioactive cesium (Cs) was discharged. As these waste liquids are radioactive and may lead to immeasurable harm towards the atmosphere and human bodies. Amongst them, 137 Cs is definitely the most typical radionuclide in this variety of waste liquid; it produces continuous radi.