Synthesis and application of graphene oxide-coated biochar composite for treatment of strontium-containing solution
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ORIGINAL PAPER
Synthesis and application of graphene oxide‑coated biochar composite for treatment of strontium‑containing solution V. Chakraborty1 · P. Das2,3 · P. K. Roy1 Received: 13 May 2020 / Revised: 21 July 2020 / Accepted: 2 September 2020 © Islamic Azad University (IAU) 2020
Abstract Removal of strontium was studied by an efficient sustainable and environmentally friendly nanocomposite, prepared from thermally activated and chemically modified sawdust coated with graphene oxide nanoparticle. The adsorbent used in this study efficiently removed strontium from synthetic aqueous solution. Batch study and fixed-bed column study were performed for optimizing the best suitable parameter for efficiently removing strontium from the experimental solution. The optimized adsorbent dose for the removal of strontium was found to be 2 mg/ml with adsorption capacity 4.09 mg/g that can remove 50 mg/L of strontium solution, which was better compared to other adsorbent doses. The removal of strontium was enhanced at neutral pH (6–8) and 313 K temperature. The column study suggested that the adsorbent can be efficiently used for longer time period. Thomas model was best suited for describing the breakthrough parameters for the column. The reusability of the adsorbent was also studied to make the whole process more economical and environmentally friendly.
Editorial responsibility: U.W. Tang. * P. Das [email protected] 1
School of Water Resources Engineering, Jadavpur University, Kolkata, India
2
Department of Chemical Engineering, Jadavpur University, Kolkata, India
3
School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, India
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Vol.:(0123456789)
International Journal of Environmental Science and Technology
Graphic abstract
Keywords Adsorption · Batch study · Column study · Model study · Nanocomposite · Strontium removal
Introduction The management of nuclear waste is gaining concern according to recent research [1]. The development of disposal techniques for commercial treatment of nuclear wastes is on top priority. Some radioactive isotopes such as strontium, plutonium, americium, cesium and technetium are usually present in nuclear wastewater (Ahmadpour et al. 2010). The discharge of 90Sr from reprocessing of nuclear fuels is one of the major types of effluents discharged as nuclear fission product. The use of strontium is not restricted to only nuclear power industry, it has wide commercial usage, and it is also used in different industries to prepare optical products. The recovery and separation of strontium from wastewater need immediate attention due to its high solubility in water, long life in environment and bio-toxicity in living organism.
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In the last few years, considerable research has been done for the development of better techniques of separation of radioactive materials from effluents. Recently, many physicochemical processes have been developed for treatment of these wastes, such as flocculation, chemical precip
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