Development of copper—iron bimetallic nanoparticle impregnated activated carbon derived from coconut husk and its efficacy as a novel adsorbent toward the removal of chromium (VI) from aqueous solution

Rahaman, Mehabub; Das, Arit; Bose, Saswata

doi:10.1002/wer.1502

Cited by 6 publications

(3 citation statements)

References 62 publications

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“…Positive values of ∆ H ° (11.49 kJ/mol) and ∆ S ° (23.78 J/mol K) indicate an endothermic process, increasing disorder at the solid–solution interface during adsorption. The negative value of ∆ H ° (from −45.83 to −36.50 kJ/mol) at higher temperatures suggests a spontaneous adsorption reaction [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

3D Printed Functionalized Nanocellulose as an Adsorbent in Batch and Fixed-Bed Systems

et al. 2023

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Nanocellulose, a refined form of cellulose, can be further functionalized on surface-active sites, with a catalyst as a regenerative agent. Newly developed adsorbents are expected to have the characteristics of good and rapid adsorption performance and regeneration properties with flexible structure using 3D printing technology. In this work, the adsorption performance of 3D printed functionalized nanocellulose was investigated using batch and fixed-bed column adsorption. Kinetics adsorption studies were divided into different adsorption models, with the pseudo-second order model showing a better correlation coefficient than the pseudo-first order and intraparticle diffusion models. The Langmuir and Thomas models were used to calculate the adsorption performance of batch and fixed-bed columns. Given the catalytic activity of Fenton oxidation, the fixed-bed column was regenerated up to five adsorption-desorption cycles, suggesting satisfactory performance of the column, with a slightly reduced adsorption capacity.

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Section: Resultsmentioning

confidence: 99%

3D Printed Functionalized Nanocellulose as an Adsorbent in Batch and Fixed-Bed Systems

et al. 2023

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“…Various technologies have been developed for the removal of As and F in order to achieve these permissible limits [14][15][16][17][18], and among them, adsorption with modified activated carbons [19,20] is a very promising and widely applied technique [21,22]. However, several studies [12,17,23] have been carried out to investigate the simultaneous removal of arsenic and fluoride, and a reduction in the removal efficiency of one of the two pollutants is generally observed.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of As(III) and Fluoride Ions from Water Using Manganese Oxide Supported on Graphene Nanostructures (GO-MnO2)

et al. 2023

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In the present research, the use of manganese oxides supported on graphene nanostructures (GO-MnO2), which support the synergistic action of adsorption and oxidation, in the combined removal of arsenic and fluoride from drinking water was studied. The simultaneous occurrence of fluoride and arsenic in groundwater is one of the major environmental problems, occurring mainly in anhydrous regions of Latin America and the world. These pollutants cause significant health problems and are difficult to remove simultaneously from drinking water. The structure of GO-MnO2 was characterized by the application of FTIR, EDS and SEM techniques. The effects of the adsorbent’s dosage, the pH value, the contact time and the initial concentrations of As(III) and F ions (F−) were examined with respect to the removal of As(III) and F ions. According to the results, the presence of arsenic enhances fluoride removal with increasing arsenic concentrations, and the presence of fluoride enhances arsenic removal with increasing fluoride concentrations, mainly at a neutral pH value. The co-presence removal efficiencies were 89% (a residual concentration of 1.04 mg/L) for fluoride and about 97% (a residual concentration of 2.89 μg/L) for arsenic.

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“…Among these, the adsorption method has drawn a lot of interest because of its benefits, which include its high efficiency, adaptability, economy, and ease of use [8]. Cr (VI) removal is aided by carbon-based materials having large surface areas, well-developed pore structures, plenty of functional groups, and superior chemical qualities [9].…”

Section: Introductionmentioning

confidence: 99%

Nitric Acid-Treated Blue Coke-Based Activated Carbon’s Structural Characteristics and Its Application in Hexavalent Chromium-Containing Wastewater Treatment

Wang,

Luoyang

et al. 2023

Molecules

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This study primarily focused on the efficient transformation of low-priced blue coke powder into a high-capacity adsorbent and aimed to address the pollution issue of hexavalent chromium (Cr (VI))-laden wastewater and to facilitate the effective utilization of blue coke powder. A two-step method was utilized to fabricate a blue coke-based nitric acid-modified material (LCN), and the impact of nitric acid modification on the material’s structure and its efficacy in treating Cr (VI)-contaminated wastewater was evaluated. Our experimental results illustrated that, under identical conditions, LCN exhibited superior performance for Cr (VI) treatment compared to the method employing only potassium hydroxide (LCK). The specific surface area and pore volume of LCN were 1.39 and 1.36 times greater than those of LCK, respectively. Further chemical composition analysis revealed that the functional group structure on the LCN surface was more conducive to Cr (VI) adsorption. The highest amount of Cr (VI) that LCN could bind was measured at 181.962 mg/g at 318 K. This was mostly due to chemisorption, which is dominated by redox reactions. The Cr (VI) removal process by LCN was identified to be a spontaneous, exothermic, and entropy-increasing process. Several tests on recycling and reuse showed that LCN is a stable and effective chromium-containing wastewater adsorbent, showing that it could be used in many situations.

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Development of copper—iron bimetallic nanoparticle impregnated activated carbon derived from coconut husk and its efficacy as a novel adsorbent toward the removal of chromium (VI) from aqueous solution

Cited by 6 publications

References 62 publications

3D Printed Functionalized Nanocellulose as an Adsorbent in Batch and Fixed-Bed Systems

3D Printed Functionalized Nanocellulose as an Adsorbent in Batch and Fixed-Bed Systems

Simultaneous Removal of As(III) and Fluoride Ions from Water Using Manganese Oxide Supported on Graphene Nanostructures (GO-MnO2)

Nitric Acid-Treated Blue Coke-Based Activated Carbon’s Structural Characteristics and Its Application in Hexavalent Chromium-Containing Wastewater Treatment

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