Adsorption of Mn(<scp>ii</scp>) ions from wastewater using an AgNPs/GO/chitosan nanocomposite material

Shahawy, Abeer El; Mubarak, Mahmoud F.; Shafie, Merna El; Abdulla, Hesham

doi:10.1039/d2ra04693h

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…El Shahawy et al removed Mn (II) ions from was tewater using an AgNPs/GO/chitosan nanocomposite material. Their s tudy achieved a high removal rate of 97.9% [40].…”

Section: 22manganese (Ii) Removal Tes Tsmentioning

confidence: 93%

“…Casalini et al proposed a biological manganese removal process that achieved a 95% removal rate at the filter outlet [39]. The researchers showed that manganese (II) can also be removed from water by nanotechnology processes [40]. El Shahawy et al removed Mn (II) ions from was tewater using an AgNPs/GO/chitosan nanocomposite material.…”

Section: 22manganese (Ii) Removal Tes Tsmentioning

confidence: 99%

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Removal of manganese (II) in water samples by the aeration-filtration process and determination based on 5-Br-PADAP ligand by cathodic stripping voltammetry

Ayouba Mahamane,

Guel,

Fabre

2024

Anal. Method Environ. Chem. J.

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In this study, manganese (Mn II) was determined in aqueous media by an electrochemical method, and its removal was evaluated using the aeration-filtration process (AFP). An electrochemical sensor based on carbon paste (EPC) modified with the 5-Br-PADAP ligand was used to measure Mn (II) in aqueous media. Through the optimization of analytical parameters in cathodic stripping voltammetry (CSV), real boreholes and well water samples could be analyzed for manganese content. The optimum parameters such as preconcentration potential (1100 mV), preconcentration time (240s), 5-Br-PADAP ligand concentration (20 µmol L-1), and electrode rotation speed during pre-concentration (1000 rpm) were studied and optimized. The detection limit (LOD) is estimated at 3 ´10-7 mol L-1 with a relative standard deviation (RSD) of 3.36%. The real samples showed that some water points have more concentration than the standard. A simple, effective, inexpensive, and rural-friendly method was used for treating manganese-rich water. Following the aeration phase, the sand and gravel column was filtered to remove manganese (II) from the water. The removal efficiency of Mn was obtained at a rate of 74.8- 84.5% and more than 95% after two hours of aeration and 1 hour at pH 8 for real samples.

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“…El Shahawy et al removed Mn (II) ions from was tewater using an AgNPs/GO/chitosan nanocomposite material. Their s tudy achieved a high removal rate of 97.9% [40].…”

Section: 22manganese (Ii) Removal Tes Tsmentioning

confidence: 93%

Section: 22manganese (Ii) Removal Tes Tsmentioning

confidence: 99%

Removal of manganese (II) in water samples by the aeration-filtration process and determination based on 5-Br-PADAP ligand by cathodic stripping voltammetry

Ayouba Mahamane,

Guel,

Fabre

2024

Anal. Method Environ. Chem. J.

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“…The obtained result may be explained by the fact that higher adsorbent dosages in larger beds offered more active sites for arsenic as the adsorbent's surface area increased. As a result, the solute has adequate time to make contact with the adsorbent, prolonging breakthrough [40].…”

Section: Variable Interactionmentioning

confidence: 99%

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Ahmad¹,

Gautam²,

Sawood³

et al. 2023

Preprint

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The As (III) uptake capacity of Fe impregnated AC greatly depends on availability of active surface sites of Iron Oxide, which is determined by the surface area of the anchoring particles. In this context, utilizing Al as a surface regulator, we proposed a process to attach linked fibrils of FeHO₂ with the objective of developing an adsorbent with enhanced As (III) adsorption capacity. The procedure was based on hydrothermal process using paddy husk based AC, and both Iron and aluminium ions in the test hydrolysis solution. By a dynamic approach that would enable an industrial-scale treatment, fixed column adsorption tests were conducted to enhance the generation of cleaner effluents and further study the primary mechanisms involved in the adsorption process. CCD was employed to evaluate the interactions between various operating process variables and their effects on the breakthrough time for optimization of As (III) adsorption process. The exhaust time was observed to rise with increasing dose, falling flow rate, and influent concentration. The CCD optimization result showed that the FeAlPBC was an efficient and cost effective adsorbent with a maximum response of 1681 min, when the independent parameters were retained at 15.0 g FeAlPBC dose, 500 µg/L influent concentrations, 2.0 mL/min flow rate, and a desirability value of 0.986. To further comprehend the primary adsorption mechanisms, the breakthrough curves were predicted by application of the test data in the Thomas, Adam-Bohart, Yoone-Nelson, and Advection diffusion models. The experimental results and Thomas and Advection diffusion models were in good agreement. 0.1 M NaOH solution was used to regenerate the columns. The FeAlPBC samples can be recycled upto four cycles with little to no reduction in adsorption capacity. Also, the TCLP test demonstrated that the used FeAlPBC were inert and could be put into landfills without risk. In conclusion, FeAlPBC is a strong contender for removing As (III) from potable water and has a wide range of potential future applications.

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Novel polymeric anti-scaling agents derived from herbaceous plant residues: synthesis, characterization, and efficacy against carbonate scaling via static assessment

El-Sawaf,

Ahmed,

El Aziz Elfiky

et al. 2024

Int. J. Environ. Sci. Technol.

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Adsorption of Mn(ii) ions from wastewater using an AgNPs/GO/chitosan nanocomposite material

Abstract: Water contaminated with heavy metal ions is extremely poisonous and threatens living organisms. Therefore, scientists place a premium on removing heavy metal ions from water that has already been contaminated. Process for the production of chitosan from crustacean shell waste

Cited by 6 publications

References 31 publications

Removal of manganese (II) in water samples by the aeration-filtration process and determination based on 5-Br-PADAP ligand by cathodic stripping voltammetry

Removal of manganese (II) in water samples by the aeration-filtration process and determination based on 5-Br-PADAP ligand by cathodic stripping voltammetry

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Novel polymeric anti-scaling agents derived from herbaceous plant residues: synthesis, characterization, and efficacy against carbonate scaling via static assessment

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