Adsorption of Nitrite and Nitrate Ions from an Aqueous Solution by Fe–Mg-Type Hydrotalcites at Different Molar Ratios

Ogata, Fumihiko; Nagai, Noriaki; Kariya, Yukine; Nagahashi, Eri; Kobayashi, Yuhei; Nakamura, Takehiro; Kawasaki, Naohito

doi:10.1248/cpb.c17-01044

Cited by 22 publications

(13 citation statements)

References 34 publications

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“…The differences in the physicochemical properties are considered as the major reasons for the differences in adsorption behavior between multi-and single-component systems. 15,17) A previous study reported that different hydrous metal oxides (Al(III), Al(III)-Fe(III), Fe(III)-Ti(IV), and Al(III)-Ti(IV) etc.) showed different boron adsorption capacities.…”

Section: Resultsmentioning

confidence: 99%

“…from the aqueous phase. [14][15][16] Mixed-metal hydroxide exhibited properties that mimic natural systems more closely than their individual components. Also, multi-component adsorbents demonstrate physicochemical characteristics substantially different from those of their single-component counter parts.…”

Section: Introductionmentioning

confidence: 99%

“…The differences in the physicochemical characteristics are considered the major reasons for the changes in adsorption behavior between single-and multi-component systems. 15,17) Till date we focused on Fe-Mg, Fe-Al, and Ni-Co complex hydroxides as adsorbents in the purification of wastewater. A previous study reported on the capacity of hydrous metal oxide (single-component including Al, Fe, Mn, and Zr, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Interaction between Borate Ions and Nickel–Aluminum Complex Hydroxide for Purification of Wastewater

Ogata

Nagai

Toda

et al. 2019

CHEMICAL & PHARMACEUTICAL BULLETIN

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A new mixed metal hydroxide adsorbent (NA11, molar ratio Ni-Al 1 : 1) was prepared and its physicochemical properties (specific surface area, amount of hydroxyl group, scanning electron microscopy images, X-ray diffraction analysis, elemental distribution, and binding energy) were studied. In addition, the amount of borate ion adsorbed using several adsorbents, including NA11, was evaluated in this study. The specific surface area of and amount of hydroxyl group in NA11 was greater than those of the other studied adsorbents. The amount of borate ion adsorbed showed similar trends to those of the specific surface area and number of hyrdroxyl groups, which indicated that the adsorption mechanism of borate ion was related to the specific surface area and the amount of hydroxyl group. After adsorption, the binding energy of boron B(1s) peaked, and the sulfur peak intensity S(2s) and S(2p) reduced. These results suggest that ion exchange between borate and sulfate ions was one of the adsorption mechanisms. Equilibrium adsorption was reached within 6 h in the case of NA11. These data were fitted into a pseudo-second-order model (r 0.813-0.998). The solution pH affected the capacity of NA11 for adsorbing borate ion from aqueous solution. It was found that adsorbance was greatest at pH 10. Adsorption isotherm data were fitted to both the Freundlich (r 0.986-0.994) and Langmuir (r 0.997-0.999) isotherm equations. Collectively, it is suggested that NA11 is prospectively useful for the adsorption of borate ion from aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Interaction between Borate Ions and Nickel–Aluminum Complex Hydroxide for Purification of Wastewater

Ogata

Nagai

Toda

et al. 2019

CHEMICAL & PHARMACEUTICAL BULLETIN

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“…from water. [15][16][17][18][19] We found that nickel-aluminium complex hydroxide showed excellent adsorption of toxic anionic compounds from aqueous solution. 20) However, there are no reports pertaining to the fundamental study or application of adsorption of chromium(VI) ion (toxic anionic compound) from aqueous solution.…”

Section: Introductionmentioning

confidence: 91%

Evaluation of Nickel–Aluminium Complex Hydroxide for Adsorption of Chromium(VI) Ion

et al. 2020

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In this study, nickel-aluminium complex hydroxides at different molar ratios (nickel-aluminium 1 : 2, 1 : 1, 2 : 1, 3 : 1, and 4 : 1, referred to as NA12, NA11, NA21, NA31, and NA41) were prepared, and their adsorption capability for chromium(VI) ion was investigated. Firstly, physicochemical characteristics (SEM images, X-ray diffraction (XRD) patterns, specific surface area, amount of hydroxyl groups, and surface pH) of nickel-aluminum complex hydroxide were evaluated. The amount of chromium(VI) ion adsorbed onto NA11 (15.3 mg/g) was greater than that adsorbed onto the other adsorbents. This research elucidated that the amount of chromium(VI) ion adsorbed using nickel-aluminium complex hydroxide was related to the adsorbent surface properties (r 0.818-0.875). Subsequently, the adsorbent (NA11) surface before and after adsorption of chromium(VI) ion was evaluated, and chromium energy (577 and 586 eV) detected after adsorption onto the NA11 surface. These results revealed that the NA11 surface properties were very important for the removal of chromium(VI) ion from aqueous solution. In addition, the effects of pH, contact time, and temperature on the adsorption of chromium(VI) ion were evaluated. We confirmed a high recovery percentage of chromium(VI) ion when using sodium hydroxide solution at 10-1000 mmol/L (approximately greater than 80%) in this experimental condition. Thus, NA11 is a promising adsorbent for the removal of chromium(VI) ion from aqueous solution.

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“…Anionic clay, also known as hydrotalcite or layered double hydroxide, is a favorable sorbent material, with a great anion sorption capability. 5) A previous study reported that Fe-Mgtype hydrotalcite showed high adsorption capability for nitrite and nitrate ions in a single solution system. Additionally, the study elucidated part of the adsorption mechanism of the nitrite and nitrate ions.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Capability of Fe-HT3.0 for Nitrite and Nitrate Ions in a Binary Solution System

Ogata

Nagai

Nakamura

et al. 2019

CHEMICAL & PHARMACEUTICAL BULLETIN

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In this study, the adsorption capability of Fe-HT3.0 for nitrite and nitrate ions in a binary solution system was evaluated. It was found that the amount of nitrite and nitrate ions adsorbed in a single solution (1.19 and 1.27 mmol/g, respectively) was higher than that in a binary solution (0.36 and 0.90 mmol/g, respectively). Equilibrium adsorption was attained within 6-24 h. The adsorption data were fitted to a pseudo-secondorder model (correlation coefficient: 0.999), and indicated that the adsorption of both nitrite and nitrate ions is controlled by chemical sorption. Additionally, the binding energies before and after the adsorption of nitrite and nitrate ions in the binary solution system were measured. After adsorption, new nitrogen peaks (approx. 399 and 403 eV) were detected. The results of this study show the potential of Fe-HT3.0 for the removal of nitrite and nitrate ions from aqueous solution systems.

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Adsorption of Nitrite and Nitrate Ions from an Aqueous Solution by Fe–Mg-Type Hydrotalcites at Different Molar Ratios

Cited by 22 publications

References 34 publications

Evaluation of the Interaction between Borate Ions and Nickel–Aluminum Complex Hydroxide for Purification of Wastewater

Evaluation of the Interaction between Borate Ions and Nickel–Aluminum Complex Hydroxide for Purification of Wastewater

Evaluation of Nickel–Aluminium Complex Hydroxide for Adsorption of Chromium(VI) Ion

Adsorption Capability of Fe-HT3.0 for Nitrite and Nitrate Ions in a Binary Solution System

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