Adsorption of Mn (II) ion on polyvinyl alcohol/chitosan dry blending from aqueous solution

Abdeen, Z.; Mohammad, Somaia G.; Mahmoud, Mohamed S.

doi:10.1016/j.enmm.2014.10.001

Cited by 69 publications

(34 citation statements)

References 32 publications

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“…It demonstrated that the Mn 2+ adsorption capacity of Pleurotus ostreatus nanoparticles increased from 41.5 mg/g to 53.0 mg/g as the pH increased from 3.0 to 4.0, but there was limited additional change as the pH increased to pH 7.0. The same phenomenon was observed for a metakaolin based geopolymer [52] and polyvinyl alcohol/chitosan [58]. It can be concluded that Mn(II) adsorption is weak at lower pH values for most adsorbents because the concentration of H + ions is higher at a lower pH.…”

Section: Effect Of Ph On Adsorptionsupporting

confidence: 73%

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

et al. 2019

Water

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Many global mining activities release large amounts of acidic mine drainage with high levels of manganese (Mn) having potentially detrimental effects on the environment. This review provides a comprehensive assessment of the main implications and challenges of Mn(II) removal from mine drainage. We first present the sources of contamination from mineral processing, as well as the adverse effects of Mn on mining ecosystems. Then the comparison of several techniques to remove Mn(II) from wastewater, as well as an assessment of the challenges associated with precipitation, adsorption, and oxidation/filtration are provided. We also critically analyze remediation options with special emphasis on Mn-oxidizing bacteria (MnOB) and microalgae. Recent literature demonstrates that MnOB can efficiently oxidize dissolved Mn(II) to Mn(III, IV) through enzymatic catalysis. Microalgae can also accelerate Mn(II) oxidation through indirect oxidation by increasing solution pH and dissolved oxygen production during its growth. Microbial oxidation and the removal of Mn(II) have been effective in treating artificial wastewater and groundwater under neutral conditions with adequate oxygen. Compared to physicochemical techniques, the bioremediation of manganese mine drainage without the addition of chemical reagents is relatively inexpensive. However, wastewater from manganese mines is acidic and has low-levels of dissolved oxygen, which inhibit the oxidizing ability of MnOB. We propose an alternative treatment for manganese mine drainage that focuses on the synergistic interactions of Mn in wastewater with co-immobilized MnOB/microalgae.

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Section: Effect Of Ph On Adsorptionsupporting

confidence: 73%

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

et al. 2019

Water

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“…Result obtained for the ΔG parameter reveals the spontaneous nature of the lead ions biosorption process by PODB and PODA, whereas for ΔH parameter it reveals the exothermic nature of the process. 37,38 Negative values of ΔS are associated with a decrease in randomness between the biosorbent-adsorbate interfaces, thus suggesting favorable sorption probability. 38 According to Atkins and Paula 39 and Schmal, 40 energy rates between −10 and − 100 kcal/mol characterize the chemisorption process.…”

Section: Temperature Influence and Thermodynamic Study Of Adsorptiomentioning

confidence: 99%

Analysis of the influence of natural adsorbent functionalization (Moringa oleifera) for Pb(II) removal from contaminated water

Tavares

Pinto

Vicentini

et al. 2019

Env Prog and Sustain Energy

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Due to lead (Pb) being highly toxic and harmful to living beings, several techniques have been studied aiming at its removal from contaminated water, with great emphasis on the adsorption process. In this sense, the objective of this study was to investigate if the chemical functionalization in biosorbents of Moringa oleifera pods promotes greater potential in the process of removing lead from aqueous solution. To this end, characterization of biomass was performed by energy dispersive X‐ray spectroscopy, Fourier transform infrared spectroscopy analysis, scanning electron microscopy, X‐ray diffraction, and zero load point. Additionally, the parameters that influence the efficiency of lead biosorption have been investigated. From the studied parameters, the optimal conditions obtained for both analyzed biosorbents are as follows: 30 min to equilibrium, pH 6 and 25°C temperature. Biosorption studies revealed kinetic modeling of data were better represented by the pseudo‐second model. In relation to adsorption isotherms, the model that best fit the experimental data were the Langmuir model for both biosorbents. When comparing the biosorbents studied, it was concluded that chemical functionalization carried out using basic treatment agent was the most efficient in removing lead ions (II), and the maximum adsorption capacity obtained was 38.52 mg/g.

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“…3, the heavy metal removal potential of biosorbent increased with increasing concentration of manganese. This is because the higher heavy metal concentration provides a greater driving force to overcome the mass transfer resistance of heavy metal ions between the biosorption medium and biosorbent [6].…”

Section: Effect Of Manganese Concentrationmentioning

confidence: 99%

Utilization of Sawdust Waste Biomass as an Eco-Friendly Biosorbent for Bioremediation of Manganese Pollution in Aqueous Environment

Deniz¹

2019

acperpro

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In this study, the sawdust waste biomass was used as an eco-friendly biosorbent material for the bioremediation of manganese pollution in aqueous environment. The effects of various environmental variables such as pH, biosorbent amount, metal concentration and contact time on the manganese biosorption were studied in batch operating conditions. The kinetic and equilibrium studies were performed to elucidate the biosorption behavior of biosorbent material. The biosorption capacity of biosorbent was strongly influenced by the operating parameters. The experimental data were more successfully modeled by the pseudo-second-order kinetic model and Langmuir isotherm model compared to other models applied in the study. The maximum manganese removal capacity of biosorbent was found to be 25.655 mg g -1 . These findings showed that the sawdust waste biomass can be used as an eco-friendly biosorbent material for the bioremediation of manganese pollution in aqueous environment.

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Adsorption of Mn (II) ion on polyvinyl alcohol/chitosan dry blending from aqueous solution

Cited by 69 publications

References 32 publications

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

Analysis of the influence of natural adsorbent functionalization (Moringa oleifera) for Pb(II) removal from contaminated water

Utilization of Sawdust Waste Biomass as an Eco-Friendly Biosorbent for Bioremediation of Manganese Pollution in Aqueous Environment

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