Decontamination of actual radioactive wastewater containing 137Cs using bentonite as a natural adsorbent: equilibrium, kinetics, and thermodynamic studies

Muslim, Wasan A.; Albayati, Talib M.; Al-Nasri, Salam Kudhair

doi:10.1038/s41598-022-18202-y

Cited by 36 publications

(4 citation statements)

References 37 publications

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“…8e) inside the grainlike morphology appeared plate-like, compact and almost flat sheets. The same observation in the case of Cs-sorption onto raw bentonite was made in SEM images by Muslim et al [48]. Similar images can also be seen in Zhang et al [49], where the sorption of Pb(II) onto alkaline Ca-bentonite was investigated.…”

Section: Characterization Of the Materialssupporting

confidence: 76%

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Dianellou

Karantoumanis

Tsamos

et al. 2023

J Radioanal Nucl Chem

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Sorption properties of Greek bentonites and zeolites were investigated in raw form and after irradiation for removal of Cs, Co and Eu from aqueous solutions using 137Cs, 60Co and 152Eu as tracers and γ-spectroscopy. The sorption experiments were undertaken under different conditions (pH, concentration, competitive ions and temperature). The structural changes of the sorbents due to irradiation and metal sorption were examined through XRD, FTIR and SEM/EDS. Sorption isotherms were reproduced by mathematical models and thermodynamic parameters were derived. The results showed that the sorption capacity was slightly affected by irradiation. The environmental compatibility tests proved the safe disposal of the investigated materials.

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Section: Characterization Of the Materialssupporting

confidence: 76%

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Dianellou

Karantoumanis

Tsamos

et al. 2023

J Radioanal Nucl Chem

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“…( 2 ). where: and are the adsorption capacity in (mg/g) and 4-nitroaniline concentration in solution in (mg/L) respectively at time t 30 .…”

Section: Methodsmentioning

confidence: 99%

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Ali

Harharah

Salih³

et al. 2023

Sci Rep

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In this work, the MCM-48 mesoporous material was prepared and characterized to apply it as an active adsorbent for the adsorption of 4-nitroaniline (4-Nitrobenzenamine) from wastewater. The MCM-48 characterizations were specified by implementing various techniques such as; scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, pore size distribution (PSD), and Fourier transform infrared (FTIR). The batch adsorption results showed that the MCM-48 was very active for the 4-nitroaniline adsorption from wastewater. The adsorption equilibrium results were analyzed by applying isotherms like Langmuir, Freundlich, and Temkin. The maximum experimental uptake according to type I Langmuir adsorption was found to be 90 mg g−1 approximately. The Langmuir model with determination coefficient R2 = 0.9965 is superior than the Freundlich model R2 = 0.99628 and Temkin model R2 = 0.9834. The kinetic adsorption was investigated according to pseudo 1st order, pseudo 2nd order, and Intraparticle diffusion model. The kinetic results demonstrated that the regression coefficients are so high R2 = 0.9949, that mean the pseudo 2nd order hypothesis for the adsorption mechanism process appears to be well-supported. The findings of adsorption isotherms and kinetics studies indicate the adsorption mechanism is a chemisorption and physical adsorption process.

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“…The adsorption process was studied in combination with the CFD process in order to increase the advantages and reach higher removal rates at low cost [12]. Bentonite clay, a natural adsorbent, was chosen for this work as it is known for its abundance, low cost, accessibility, nontoxicity, high specific surface area, high adsorption capabilities, and capacity for cation exchange [27,29,49].…”

Section: Agitation Effectmentioning

confidence: 99%

Valorization of Cherry By-Products as Coagulant/Flocculants Combined with Bentonite Clay for Olive Mill Wastewater Treatment

Teixeira,

Afonso,

Jorge

et al. 2024

Water

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In this study, two by-products resulting from the processing of cherry (stems and pits) were used as natural coagulants to promote the valorization of these wastes and treat olive mill wastewater (OMW). The efficacy of the plant-based coagulants (PBCs) in the coagulation–flocculation–decantation process (CFD) was evaluated through the removal of turbidity, total suspended solids (TSS), total polyphenols (TPh), and dissolved organic carbon (DOC). The CFD process was demonstrated to be effective in turbidity and TSS reduction in OMW. Using cherry stems (CSs), these reductions were 65.2% of turbidity and 58.0% of TSS, while cherry pits (CPs) achieved higher reductions, 78.6% of turbidity and 68.2% of TSS. To improve the effectiveness of OMW treatment, mainly regarding the removal of TPh and DOC, the CFD process was complemented with the adsorption process (using bentonite clay). The adsorption capacity of bentonite was higher in acidic conditions (pH 3.0) and, with a dosage of 3.0 g L−1, reached 17.3 mg of DOC and 13.8 mg of TPh per gram of bentonite. Several adsorption isothermal models were assessed, and the Langmuir (r2 = 0.985), SIPS (r2 = 0.992), and Jovanovic models (r2 = 0.994) provided the best fittings. According to the optimal operational conditions defined throughout the present work, the combination of CFD and adsorption removals were as follows: (1) 98.0 and 91.3% of turbidity, (2) 80.8 and 81.2% of TSS, (3) 98.1 and 97.6% of TPh and (4) 57.9 and 62.2% of DOC, for CSs and CPs, correspondingly. Overall, the results suggest that cherry by-products can be used as low-cost natural coagulants and, when combined with another natural, abundant, and cheap material, such as bentonite clay, can be a sustainable alternative for treating OMW.

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Decontamination of actual radioactive wastewater containing 137Cs using bentonite as a natural adsorbent: equilibrium, kinetics, and thermodynamic studies

Cited by 36 publications

References 37 publications

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Valorization of Cherry By-Products as Coagulant/Flocculants Combined with Bentonite Clay for Olive Mill Wastewater Treatment

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