Ecofriendly, selective removal of radioactive strontium ions in aqueous solutions using magnetic banana peels

Choi, Jung-Weon; Cho, Sangeun; Choi, Sang-June

doi:10.1016/j.scitotenv.2021.146327

Cited by 18 publications

(5 citation statements)

References 52 publications

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“…The selective adsorption of Sr(II) in the presence of coexisting ions is influenced by Na(I), Mg(II), and Ca(II) plasma in the wastewater. In particular, Na(I) becomes an important coexisting ion affecting the removal of Sr(II) [26]. Therefore, it is necessary to clarify the effects of Na(I) during Sr(II) adsorption.…”

Section: Effects Of Na(i)mentioning

confidence: 99%

“…However, synthesizing these adsorbents is expensive and time-consuming. Recently, research has been conducted on the low-cost and easy synthesis of materials containing Sr(II) adsorbents, such as pecan shell, paprika biochar, banana peels biochar, basil seed, coffee grounds and bamboo charcoal [24][25][26][27][28][29]. However, experiments using CSBC, especially mag@CSBC magnetized by magnetite, to adsorb Sr (II) have not yet been carried out.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Lü

Feng

Otero³

et al. 2023

Separations

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The cooling water of nuclear power plants and discarded crayfish shells (CS), both containing Sr(II), are waste resources that cause environmental pollution and endanger human health. In this study, magnetic biochar produced by crayfish shells (mag@CSBC) was used as an adsorbent to remove radionuclide Sr(II) in an aqueous solution and under irradiation conditions. Scanning electron microscopy, X-ray diffraction analysis, Fourier-transform infrared spectroscopy and vibration sample magnetometer analysis were used to characterize mag@CSBC. In addition, an isothermal adsorption experiment conducted under irradiation conditions determined that the maximum adsorption capacity of mag@CSBC was 21.902 mg/g, which was 1.896 mg/g higher than that from experiments conducted under conditions without irradiation and more suitable for the Freundlich isotherm model. The kinetic experiment proved that irradiation could improve the adsorption cap acity of mag@CSBC and reduce the adsorption equilibrium time. At the same time, the experiment further proved that, under irradiated conditions, the adsorption rate of mag@CSBC can reach more than 90%, and the adsorption capacity is the highest when the pH is 8 and the reaction process is exothermic. Competitive adsorption with Na(I) has a high selectivity and strong recyclability. Finally, the mechanism of Sr(II) adsorption by mag@CSBC under irradiation was studied. In conclusion, mag@CSBC, as a low-cost, easy-to-synthesize, environmentally friendly and easy-to-recycle adsorbent, can be applied in batches for the removal of Sr(II) in aqueous solutions. In particular, the concept of using irradiation technology to optimize adsorption behavior serves as an inspiration for future research.

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Section: Effects Of Na(i)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Lü

Feng

Otero³

et al. 2023

Separations

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“…Radionuclides are elements that emit alpha, beta, gamma rays, or neutrons [173], and they can occur naturally (e.g., terrestrial and cosmogenic) or anthropogenic (e.g., nuclear plants, weapons, testing sites, lignit burning, and fertilizers use) [173, 174]. Some radionuclides can be found in water due to the rock lixiviation and accidents in nuclear facilities [173, 175]. These radioactive elements can have a long life-time and radioactivity.…”

Section: Use Of Magnetic Adsorbents For Water Pollutant(s) Removalmentioning

confidence: 99%

“…These radioactive elements can have a long life-time and radioactivity. The toxicology of these pollutants is associated to neurological damage, birth defects, and cancer [173, 175, 176]. Some magnetic adsorbents have prepared and tested to remove radionuclides.…”

Section: Use Of Magnetic Adsorbents For Water Pollutant(s) Removalmentioning

confidence: 99%

Engineered Magnetic Carbon-Based Adsorbents for the Removal of Water Priority Pollutants: An Overview

Reynel-Ávila

Camacho-Aguilar

Bonilla-Petriciolet

et al. 2021

Adsorption Science & Technology

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This review covers the preparation, characterization, and application of magnetic adsorbents obtained from carbon-based sources and their application in the adsorption of both inorganic and organic pollutants from water. Different preparation routes to obtain magnetic adsorbents from activated carbon, biochar, hydrochar, graphene, carbon dots, carbon nanotubes, and carbon nanocages, including the magnetic phase incorporated on the solid surface, are described and discussed. The performance of these adsorbents is analyzed for the removal of fluoride, arsenic, heavy metals, dyes, pesticides, pharmaceuticals, and other emerging and relevant water pollutants. Properties of these adsorbents and the corresponding adsorption mechanisms have been included in this review. Overall, this type of magnetic adsorbents offers an alternative for facing the operational problems associated to adsorption process in water treatment. However, some gaps have been identified in the proper physicochemical characterization of these adsorbents, the development of green and low-cost preparation methods for their industrial production and commercialization, the regeneration and final disposal of spent adsorbents, and their application in the multicomponent adsorption of water pollutants.

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“…Notably, 90 Sr, with a half-life (T 1/2 ) of approximately 28.8 years, is particularly detrimental due to its high bioactivity and tendency for biological accumulation [ 4 , 5 ]. Like calcium, 90 Sr is osteotropic, integrating into the skeletal system upon dietary intake [ 6 , 7 ]. It then emits high-energy beta particles that inflict irreversible damage to adjacent tissues.…”

Section: Introductionmentioning

confidence: 99%

Selective Adsorption of Sr(II) from Aqueous Solution by Na3FePO4CO3: Experimental and DFT Studies

Xie,

Wang,

Men

et al. 2024

Molecules

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The efficient segregation of radioactive nuclides from low-level radioactive liquid waste (LLRW) is paramount for nuclear emergency protocols and waste minimization. Here, we synthesized Na3FePO4CO3 (NFPC) via a one-pot hydrothermal method and applied it for the first time to the selective separation of Sr2+ from simulated LLRW. Static adsorption experimental results indicated that the distribution coefficient Kd remained above 5000 mL·g−1, even when the concentration of interfering ions was more than 40 times that of Sr2+. Furthermore, the removal efficiency of Sr2+ showed no significant change within the pH range of 4 to 9. The adsorption of Sr2+ fitted the pseudo-second-order kinetic model and the Langmuir isotherm model, with an equilibrium time of 36 min and a maximum adsorption capacity of 99.6 mg·g−1. Notably, the adsorption capacity was observed to increment marginally with an elevation in temperature. Characterization analyses and density functional theory (DFT) calculations elucidated the adsorption mechanism, demonstrating that Sr2+ initially engaged in an ion exchange reaction with Na+. Subsequently, Sr2+ coordinated with four oxygen atoms on the NFPC (100) facet, establishing a robust Sr-O bond via orbital hybridization.

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Ecofriendly, selective removal of radioactive strontium ions in aqueous solutions using magnetic banana peels

Cited by 18 publications

References 52 publications

Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Engineered Magnetic Carbon-Based Adsorbents for the Removal of Water Priority Pollutants: An Overview

Selective Adsorption of Sr(II) from Aqueous Solution by Na3FePO4CO3: Experimental and DFT Studies

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