Equilibrium and kinetics studies on As(V) and Sb(V) removal by Fe2+-doped Mg–Al layered double hydroxides

Kameda, Tomohito; Kondo, Eisuke; Yoshioka, Toshiaki

doi:10.1016/j.jenvman.2014.12.050

Cited by 40 publications

(10 citation statements)

References 25 publications

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“…Although the overlapping of Sb 3d and O 1s photo-electron peaks, deconvolution of O1s þ Sb 3d 5/2 spectra yielded two peaks: peak I (529.6 eV) and peak II (530.8 eV). The spectra of peak I was assigned to Sb(III) species (Kameda et al 2015), and peak II might be assigned to oxygen atoms in iron oxides (Basly et al 2013). Therefore, it can be inferred that when ferrous lactate was used as iron source for IOB-L, most of Sb(III) was adsorbed to generated biogenic iron oxides, and did not oxidized to Sb(V).…”

Section: Xps Analysismentioning

confidence: 99%

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Liu

et al. 2022

Water Science and Technology

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Iron-oxidizing bacteria played an important role in the treatment of Sb-containing wastewater. In this study, effect of different iron sources on Sb(III) removal ability by isolated iron-oxidizing bacteria (named as IOB-L) was conducted systemically in batch experiment. Moreover, ferrous lactate and zero-valent iron were chosen as iron sources for IOB-L. The results showed that after inoculation of 2% volume of IOB-L, Sb(III) concentration in water decreased from initial 18 mg/L to 4.1 mg/L at optimal pH of 7.0. There was no reaction between Sb(III) and ferrous lactate, whereas corrosion product of iron can adsorb certain amount of Sb. When active IOB-L cultivated in ferrous lactate, a better removal rate of Sb(III) can be reached with a longer stagnate phase for bacteria. However, Sb(III) removal ability of IOB-L using zero-valent iron as iron source was lower. SEM-EDS, FTIR, and XPS analysis further indicated that ferrous lactate was oxidized by IOB-L and precipitated as biogenic iron oxides which had strong adsorption ability towards Sb(III), whereas zero-valent iron was not a good iron source.

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Section: Xps Analysismentioning

confidence: 99%

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Liu

et al. 2022

Water Science and Technology

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“…Therefore, the researchers focused on discovering cheap, environmentally friendly, simple and efficient manganese removal methods. The layered double hydroxide (LDH) materials for removal of manganese can be synthesized in the laboratory by simple and economical methods (e.g., incipient impregnation [8], hydrothermal routes [9], dropwise addition of a chloride solution [10], hydrolysis [11], solar light irradiation [12], co-precipitation [13], ionic exchange, direct co-precipitation and structure reconstruction after calcination [14]). Wimonsong et al [8] report the preparation of different Au/Fe-Zn-Mg-Al-O hydrotalcite (HT) supported Au catalysts by a co-precipitation method.…”

Section: Introductionmentioning

confidence: 99%

“…They demonstrated that these core-shell hybrid arrays exhibit good rate capability with a long cycle lifetime. Kameda et al [10] studied the equilibrium and kinetics in order to determine the effect of Fe 2+ -doped Mg-Al LDH on the removal of As(V) and Sb(V) from an aqueous solution. Sepehr et al [11] synthesized magnesium (Mg)/aluminum (Al) layered double hydroxide (LDH) nanoparticles by hydrolyzing urea and used them to remove metronidazole (MN) from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Mixed Oxide Layered Double Hydroxide Materials: Synthesis, Characterization and Efficient Application for Mn2+ Removal from Synthetic Wastewater

et al. 2020

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Magnesium–aluminum (Mg-Al) and magnesium–aluminum–nickel (Mg-Al-Ni) layered double hydroxides (LDHs) were synthesized by the co-precipitation method. The adsorption process of Mn2+ from synthetic wastewater was investigated. Formation of the layered double hydroxides and adsorption of Mn2+ on both Mg-Al and Mg-Ni-Al LDHs were observed by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometry (EDX) analysis. XRD patterns for prepared LDHs presented sharp and symmetrical peaks. SEM studies revealed that Mg-Al LDH and Mg-Al-Ni LDH exhibit a non-porous structure. EDX analysis showed that the prepared LDHs present uniformly spread elements. The adsorption equilibrium on these LDHs was investigated at different experimental conditions such as: Shaking time, initial Mn2+ concentration, and temperatures (10 and 20 °C). The parameters were controlled and optimized to remove the Mn2+ from synthetic wastewater. Adsorption isotherms of Mn2+ were fitted by Langmuir and Freundlich models. The obtained results indicated that the isotherm data fitted better into the Freundlich model than the Langmuir model. Adsorption capacity of Mn2+ gradually increased with temperature. The Langmuir constant (KL) value of Mg-Al LDH (0.9529 ± 0.007 L/mg) was higher than Mg-Al-Ni LDH (0.1819 ± 0.004 L/mg), at 20 °C. The final adsorption capacity was higher for Mg-Al LDH (91.85 ± 0.087%) in comparison with Mg-Al-Ni LDH (35.97 ± 0.093%), at 20 °C. It was found that the adsorption kinetics is best described by the pseudo-second-order model. The results indicated that LDHs can be considered as a potential material for adsorption of other metallic ions from wastewater.

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“…The LDH structure is characterized by positive octahedral brucite-like layers, where the excess of positive charge is due to the isomorphic substitution of M 2þ with M 3þ , alternating with negative interlayers containing anions and a variable quantity of water (Cavani et al, 1991). These compounds are widely studied, both untreated and calcined, for the removal of anionic pollutants from water thanks to the high anion exchange capacity of untreated phases and the high sorption capacity of calcined ones (Li and Duan, 2006;Carriazo et al, 2007;Goh et al, 2008;Lv et al, 2009;Ardau et al, 2011Ardau et al, , 2012Kameda et al, 2015;Frau, 2018, 2019;. Moreover, LDH can be effective removers of cationic pollutants by (co)precipitation and adsorption (Park et al, 2007;Liang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

A two-step pH control method to remove divalent metals from near-neutral mining and metallurgical waste drainages by inducing the formation of layered double hydroxide

Frau

Atzori

Ardau

et al. 2020

Journal of Environmental Management

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A neutral M 2þ -rich and M 3þ -poor (M ¼ metal) metallurgical waste drainage was used to test a metal removal method based on the precipitation of layered double hydroxide (LDH). The LDH precipitation was induced by adding a salt of Al 3þ (trivalent metal missing in the drainage) and maintaining or restoring the pH to a circumneutral value. The precipitates were characterized by chemical analysis, XRD, ESEM, HRTEM and XAS. The main parameter controlling the removal of metals and the type of precipitate appeared to be the pH. As a function of pH variation during the experiments, analyses of precipitates and solutions showed either the formation of poor crystalline LDH combined with very high removal of Zn, Ni and Pb (92-100%), more variable removal of Mn (46-98%) and less Cd (33-40%), or the formation of more crystalline LDH combined with lower removal of Zn (62%), Mn (43%), Ni (88%), Pb (64%) and especially Cd (1%). The different metal removal efficiency in the two cases is only indirectly due to the different LDH crystallinity, and it is clearly affected by the following factors: 1) the two pH steps of the method; 2) the direction of pH variation within each step. In particular, the highest removal of metals is obtained when the first pH step goes towards acidic conditions, as a consequence of Al salt addition, and precipitation of a quasi-amorphous hydrated hydroxysulfate of Al (probably a precursor of fel-sӧb� anyaite Al 4 (SO 4 )(OH) 10 ⋅ 4H 2 O) occurs. This first acidic pH step removes little or no metals (just 0-3%) but it is essential so that the second pH step towards slightly alkaline conditions, as a consequence of NaOH addition, can be highly efficient in removing divalent metals as the quasi-amorphous hydrated hydroxysulfate of Al gradually turns into an LDH incorporating Zn, Mg and other metals. On the contrary, when both pH steps remain in the neutral-alkaline range, only LDH precipitation occurs and a lower metal removal is observed. These results encourage further investigations on the removal of metals by inducing LDH precipitation as a simple and effective method for the treatment of circum-neutral polluted drainages.

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Equilibrium and kinetics studies on As(V) and Sb(V) removal by Fe2+-doped Mg–Al layered double hydroxides

Cited by 40 publications

References 25 publications

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Mixed Oxide Layered Double Hydroxide Materials: Synthesis, Characterization and Efficient Application for Mn2+ Removal from Synthetic Wastewater

A two-step pH control method to remove divalent metals from near-neutral mining and metallurgical waste drainages by inducing the formation of layered double hydroxide

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