Interaction of arsenic(III) and arsenic(V) on manganese dioxide: XPS and electrochemical investigations

Ajith, Nicy; Bhattacharyya, Kaustava; Ipte, Priyanka R.; Satpati, Ashis Kumar; Tripathi, A. K.; Verma, Rakesh Kumar; Swain, K. K.

doi:10.1080/10934529.2018.1544478

Cited by 20 publications

(4 citation statements)

References 20 publications

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“…It could be found from Figure 11 b that the O 1s peaks of the two MnO 2 were asymmetric; the structural oxygen (Mn–O) near 529.9 mV and the adsorbed oxygen (Mn–OH) near 530.94 mV could be obtained by software fitting, indicating that there were a large number of hydroxyl functional groups on the surfaces of the two MnO 2 . 32 After the reaction of δ 1 -MnO 2 and δ 2 -MnO 2 , the O 1s peak moved to the right, indicating that the bond energy of the O 1s peak increased, the adsorption oxygen content increased, and the surface hydroxyl was more abundant. This was because H + around δ 1 -MnO 2 replaced C and K + adsorbed on its surface and the protonation of surface hydroxyl groups at low pH.…”

Section: Resultsmentioning

confidence: 96%

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺

Wang

Gou

et al. 2022

ACS Omega

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MnO 2 has shown great potential in the field of adsorption and has a good adsorption effect on heavy metal ions in aqueous solution, but there have been problems in the adsorption of heavy metal ions in high-concentration metal salt solutions. In this paper, different crystal forms of MnO 2 (α-MnO 2 , β-MnO 2 , γ-MnO 2 , δ 1 -MnO 2 , δ 2 -MnO 2 , and ε-MnO 2 ) were prepared and characterized by XRD, SEM, EDS, XPS, ZETA, and FT-IR. The reasons for the equi-acidity point pH change of MnO 2 and the complex mechanism of surface hydroxylation on metal ions were discussed. The results showed that the equi-acidity point pHs of different crystalline MnO 2 were different. The equi-acidity point pH decreased with the increase of reaction temperature and electrolyte concentration, but the reaction time had no effect on it. The equi-acidity point pHs of MnO 2 were essentially equal to the equilibrium pH values of adsorption and desorption between surface hydroxyl and metal ions on them. The change of equi-acidity points was mainly due to the complexation of surface hydroxyl, and the equi-acidity point pHs depended on the content of surface hydroxyl and the size of the complexation ability. According to the equi-acidity point pH characteristics of MnO 2 , more hydroxyl groups could participate in the complexation reaction by repeatedly controlling the pH, so that MnO 2 could adsorb heavy metals Co 2+ and Ni 2+ in high-concentration MnSO 4 solution, and the adsorption rates of Co 2+ and Ni 2+ could reach 96.55 and 79.73%, respectively. The effects of MnO 2 dosage and Mn 2+ concentration on the adsorption performance were further investigated, and the products after MnO 2 adsorption were analyzed by EDS and FT-IR. A new process for MnO 2 to adsorb heavy metals Co 2+ and Ni 2+ in high-concentration MnSO 4 solution was explored, which provided a reference for the deep purification of manganese sulfate solutions.

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Section: Resultsmentioning

confidence: 96%

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺

Wang

Gou

et al. 2022

ACS Omega

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“…= 46.24 eV) with a qualitative ratio of 75.7% and 24.3%, respectively. Hence, the partial oxidation of As(III) by impregnated TiO2 was verified by XPS using As 3d spectrum [74]. The high-resolution XPS scan of O 1s (Figure 6d) was composed of peaks at ~528.4, 529.9, and 531.8 eV are associated with Ti-O, O-As, and O-H bonds, respectively.…”

Section: X-ray Photoelectron Spectroscopy (Xps) Studiesmentioning

confidence: 86%

Agro-Waste Derived Biomass Impregnated with TiO2 as a Potential Adsorbent for Removal of As(III) from Water

et al. 2020

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A novel type of adsorbent, TiO2 impregnated pomegranate peels (PP@TiO2) was successfully synthesized and its efficacy was investigated based on the removal of As(III) from water. The adsorbent was characterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectrometer (EDS), X-ray Diffraction (XRD) analysis, and Fourier Transform Infrared (FTIR) Spectroscopy, to evaluate its morphology, elemental analysis, crystallinity, and functional groups, respectively. Batch experiments were conducted on PP@TiO2 for As(III) adsorption to assess the adsorption isotherm, effect of pH, and adsorption kinetics. Characterization data suggested that TiO2 was successfully impregnated on the biomass substrate. The equilibrium data better fitted to the Langmuir isotherm model having a maximum adsorption capacity of 76.92 mg/g and better distribution coefficients (KD) in the order of ~103 mL/g. The highest percentage of adsorption was found at neutral pH. The adsorption kinetics followed the pseudo-2nd-order model. X-ray Photoelectron Spectroscopy (XPS) of the adsorption product exhibited that arsenic was present as As(III) and partially oxidized to As(V). PP@TiO2 can work effectively in the presence of coexisting anions and could be regenerated and reused. Overall, these findings suggested that the as-prepared PP@TiO2 could provide a better and efficient alternative for the synergistic removal of As(III) from water.

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“…With the continuous deepening of antimony and arsenic adsorption research, the adsorbents that can remove antimony and arsenic are becoming increasingly diversified. Among them, the more common adsorbents with good adsorption effects are activated alumina [ 6 , 55 ], activated carbon [ 56 , 57 ], manganese dioxide [ 58 , 59 ], iron hydroxide [ 60 , 61 ], zeolite [ 62 , 63 ], clay [ 64 , 65 ], zero−valent iron [ 66 ], biomass material [ 67 ] and so on. However, several academics have demonstrated recently that iron−based adsorbents, which are inexpensive and simple to recover, have a stronger adsorption impact on Sb and As than other conventional adsorbents.…”

Section: Antimony and Arsenic Pollution Treatment Technologymentioning

confidence: 99%

Frontier Materials for Adsorption of Antimony and Arsenic in Aqueous Environments: A Review

Song

Zheng

et al. 2022

IJERPH

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As highly toxic and carcinogenic substances, antimony and arsenic often coexist and cause compound pollution. Heavy metal pollution in water significantly threatens human health and the ecological environment. This article elaborates on the sources and hazards of compound antimony and arsenic contamination and systematically discusses the research progress of treatment technology to remove antimony and arsenic in water. Due to the advantages of simple operation, high removal efficiency, low economic cost, and renewable solid and sustainable utilization, adsorption technology for removing antimony and arsenic from sewage stand out among many treatment technologies. The adsorption performance of adsorbent materials is the key to removing antimony and arsenic in water. Therefore, this article focused on summarizing frontier adsorption materials’ characteristics, adsorption mechanism, and performance, including MOFs, COFs, graphene, and biomass materials. Then, the research and application progress of antimony and arsenic removal by frontier materials were described. The adsorption effects of various frontier adsorption materials were objectively analyzed and comparatively evaluated. Finally, the characteristics, advantages, and disadvantages of various frontier adsorption materials in removing antimony and arsenic from water were summarized to provide ideas for improving and innovating adsorption materials for water pollution treatment.

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Interaction of arsenic(III) and arsenic(V) on manganese dioxide: XPS and electrochemical investigations

Cited by 20 publications

References 20 publications

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺

Agro-Waste Derived Biomass Impregnated with TiO2 as a Potential Adsorbent for Removal of As(III) from Water

Frontier Materials for Adsorption of Antimony and Arsenic in Aqueous Environments: A Review

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Interaction of arsenic(III) and arsenic(V) on manganese dioxide: XPS and electrochemical investigations

Cited by 20 publications

References 20 publications

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO2 and Its Adsorption for Co2+ and Ni2+

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO2 and Its Adsorption for Co2+ and Ni2+

Agro-Waste Derived Biomass Impregnated with TiO2 as a Potential Adsorbent for Removal of As(III) from Water

Frontier Materials for Adsorption of Antimony and Arsenic in Aqueous Environments: A Review

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Product

Resources

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Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO₂ and Its Adsorption for Co²⁺ and Ni²⁺