Adsorptive removal of boron by zeolitic imidazolate framework: kinetics, isotherms, thermodynamics, mechanism and recycling

Lyu, Jiafei; Zhang, Nan; Liu, Hongxu; Zeng, Zhouliangzi; Zhang, Jingshuang; Bai, Peng; Guo, Xianghai

doi:10.1016/j.seppur.2017.05.059

Cited by 47 publications

(15 citation statements)

References 47 publications

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“…where Q t (mg g −1 ) is the boron adsorption capacity at time t (h), Q e (mg g −1 ) is the boron adsorption amount at equilibrium time, and K (g mg −1 •h −1 ) is the equilibrium rate constant in this model. 34 The fitted curves in Figure 3c, d and relevant parameters in Table 3 demonstrated that the pseudosecond-order model could well-describe the boron adsorption process on the two pyrocatechol-modified MCM-41, based on which the adsorption behavior was considered to be a chemical adsorption process. The half adsorption time (t 1/2 ), defined as the time to reach a half of the equilibrium adsorption value, 15 was used to measure adsorption rate and can be estimated as follows:…”

Section: Characterization Of Calcined Mcm-41 Andmentioning

confidence: 79%

“…To study the adsorption kinetics on the two modified adsorbents, we used the pseudo-second-order model, given as where Q t (mg g –1 ) is the boron adsorption capacity at time t (h), Q e (mg g –1 ) is the boron adsorption amount at equilibrium time, and K (g mg –1 ·h –1 ) is the equilibrium rate constant in this model . The fitted curves in Figure c, d and relevant parameters in Table demonstrated that the pseudo-second-order model could well-describe the boron adsorption process on the two pyrocatechol-modified MCM-41, based on which the adsorption behavior was considered to be a chemical adsorption process.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis, Characterization, Adsorption, and Isotopic Separation Studies of Pyrocatechol-Modified MCM-41 for Efficient Boron Removal

Chen

Lyu

Wang

et al. 2019

Ind. Eng. Chem. Res.

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Selected by the conductive value change (Δ) caused by generated proton in the boric acid-polyol solutions, pyrocatechol (CL) and nitropyrocatechol (NCL) were grafted into the mesoporous MCM-41 material for boron removal and isotopic separation. The adsorption kinetics, isotherms and thermodynamics, effect of pH, adsorption mechanism, regeneration, and isotopic separation performance on the new materials were explored in this study. The adsorption equilibrium was reached within 10 h, with the maximum boron adsorption capacity reaching up to 1.799 mmol g −1 for CL-MCM-41 at pH 9 and 1.548 mmol g −1 for NCL-MCM-41 at pH 12, respectively. In addition, the boron isotopic separation factor was measured to be 1.158, which was significantly higher than that of commercial IRA 743. After four cycles of elution with acetic acid of low concentration, approximately 80% of the original adsorption capacity could be maintained, which also outperformed the commercial resins.

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Section: Characterization Of Calcined Mcm-41 Andmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, Adsorption, and Isotopic Separation Studies of Pyrocatechol-Modified MCM-41 for Efficient Boron Removal

Chen

Lyu

Wang

et al. 2019

Ind. Eng. Chem. Res.

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“…In urban wastewater systems, boron is mainly found in the form of boric acid or borates. Boron removal has been investigated using adsorption [ 5 , 6 ], electrocoagulation [ 7 , 8 ], electrodialysis [ 9 , 10 ], reverse osmosis [ 11 , 12 ], nanofiltration [ 13 , 14 ], microfiltration [ 15 ], ion-exchange [ 15 , 16 ], membrane distillation [ 17 ] and Donnan dialysis [ 18 , 19 ]. In order to choose the simplest and continuous method, Donnan dialysis was conducted in this study.…”

Section: Introductionmentioning

confidence: 99%

Response Surface Methodology for Boron Removal by Donnan Dialysis: Doehlert Experimental Design

et al. 2021

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The removal of boron by Donnan dialysis from aqueous solutions has been studied according to response surface methodology (RSM). First, a preliminary study was performed with two membranes (AFN and ACS) in order to determine the experimental field based on different parameters, such as the pH of the feed compartment, the concentration of counter-ions in the receiver compartment, and the concentration of boron in the feed compartment. The best removal rate of boron was 75% with the AFN membrane, but only 48% with the ACS membrane. Then, a full-factor design was developed to determine the influence of these parameters and their interactions on the removal of boron by Donnan dialysis. The pH of the feed compartment was found to be the most important parameter. The RSM was applied according to the Doehlert model to determine the optimum conditions ([B] = 66 mg/L, pH = 11.6 and [Cl–] = 0.5 mol/L) leading to 88.8% of boron removal with an AFN membrane. The use of the RSM can be considered a good solution to determine the optimum condition for 13.8% compared to the traditional “one-at-a-time” method.

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“…[3][4][5] However, previous studies have reported that the ingestion of large amounts of boron can affect the central nervous system and the reproductive system in humans. 6,7) Therefore the WHO limited the maximum boron concentration in drinking water to 2.4 ppm in 2011, while some countries set a more stringent standard. 8) Thus, there is a need for boron and its derivatives to be eliminated from water with elevated concentrations.…”

Section: Introductionmentioning

confidence: 99%

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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Adsorptive removal of boron by zeolitic imidazolate framework: kinetics, isotherms, thermodynamics, mechanism and recycling

Cited by 47 publications

References 47 publications

Synthesis, Characterization, Adsorption, and Isotopic Separation Studies of Pyrocatechol-Modified MCM-41 for Efficient Boron Removal

Synthesis, Characterization, Adsorption, and Isotopic Separation Studies of Pyrocatechol-Modified MCM-41 for Efficient Boron Removal

Response Surface Methodology for Boron Removal by Donnan Dialysis: Doehlert Experimental Design

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

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