Pyrocatechol-modified resins for boron recovery from water: Synthesis, adsorption and isotopic separation studies

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

doi:10.1016/j.reactfunctpolym.2016.12.016

Cited by 30 publications

(11 citation statements)

References 30 publications

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“…He suggested that a boron complex with glycol can be formed only at pH > 9.07 because of the ionization of boric acid. Lyu et al studied the use of pyrocatechols and nitropyrocatechol-modified resins for boron capture [62]. Optimized boron adsorption occurs at pH 9.06 for catecholbased resins and pH 6.70 for nitrocatechol-based resins, with the maximum adsorption capacities of 0.7886 mmol•g −1 and 0.7931 mmol•g −1 ; these values are comparable to the adsorption capacity of commercial IRA 743.…”

Section: Chelating Resinsmentioning

confidence: 99%

An updated review on boron removal from water through adsorption processes

et al. 2021

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Boron is an essential micronutrient that has raised much interest, given the narrow balance between its necessity and toxicity. Both natural and anthropogenic emissions of boron into water sources can eventually deteriorate water quality and endanger the ecosystem. In this review, we first present a general outline of the importance of boron, boron chemistry in water, boron contamination, and its consequences followed by the recent progress in boron removal methods based on adsorption. The adsorbents for deboronation can generally be classified based on the functional groups present; chelating groups, metal oxides, and layered double hydroxides. To comprehensively address these adsorption methods, a detailed discussion on the reaction mechanism of each system is done followed by a summary of the progress in the field during the past 5 years. Finally, some characterization techniques used in deboronation studies and suggestions for future research and applications together with possible improvements to the existing systems are presented. Graphical abstract

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Section: Chelating Resinsmentioning

confidence: 99%

An updated review on boron removal from water through adsorption processes

et al. 2021

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“…In addition, a mass of silanol groups in MCM-41 can react with functional groups, contributing to increasing polyols grafted into the support. 20−22 Our previous researches 23,24 have come up with a selected strategy according to the conductive value change (Δ) caused by the releasing protons from polyol-boric acid complexation process. N-methyl-D-glucamine, the conductive value of which is 794 μs cm −1 , has been widely used in the modification of most effective commercial boron-specific resins such as Purolite S108 25,26 and Amberlite IRA 743.…”

Section: Introductionmentioning

confidence: 99%

“…12 In a previous report of our group, pyrocatechol (Δ = 516 μs cm −1 ) and nitropyrocatechol (Δ = 1163 μs cm −1 ) have been observed as functional groups for boron-specific resin synthesis due to their similar Δvalues with N-methyl-D-glucamine and both asprepared resins show good boron adsorption capacities. 24 In this work, based on the remarkable properties of inorganic support MCM-41 and good boron complexing ability of two pyrocatechols, we designed and synthesized two pyrocatecholmodified boron-selective adsorbents with mesochannels for effective boron removal.…”

Section: Introductionmentioning

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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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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“…Adsorbents have been reported for the selective adsorption of boric acid after complexing with the hydroxyl of boric acid; these are resistant to interference by the coexisting salts during adsorption (Meng et al 2016;Lyu et al 2017;Sun et al 2018) However, most of these adsorbents mainly focus on the use of anion-exchange resin, activated carbon, and magnetic sorbents as carriers, and these carriers usually involve sophisticated preparation processes, complicated structures, and are expensive. This limits their application in the removal of boric acid.…”

Section: Introductionmentioning

confidence: 99%

Efficient and reversible removal of boric acid by chitosan/tannic acid functional paper

Sun

Xia

et al. 2019

BioRes

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It is important to remove excessive concentrations of boric acid from water because it can lead to environmental problems. However, current adsorbents are limited in separating boric acid from water due to their low desorption capability and poor selectivity for boric acid. In this study, the authors developed a functional cellulosic paper via crosslinking cellulose and tannic acid with chitosan to efficiently and reversibly remove boric acid from water. The adsorption capacity reached 769 mg/m2 according to the Langmuir model. The corresponding desorption rate of the chitosan/tannic acid-modified paper exceeded 80% in the whole flow rate region ranging from 15 to 250 mL/h. The reversible adsorption and desorption of boric acid were attributed to the formation and dissociation of the borate bond between the tannic acid and boric acid, respectively, at different pH values. This study improved the selectivity, batch adsorption, expensive carriers, and desorption difficulties of existing boric acid adsorption materials. This approach offers a new way to design highly efficient adsorption/desorption materials by constructing reversible chemical bonds for removal of other pollutants.

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Pyrocatechol-modified resins for boron recovery from water: Synthesis, adsorption and isotopic separation studies

Cited by 30 publications

References 30 publications

An updated review on boron removal from water through adsorption processes

An updated review on boron removal from water through adsorption processes

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

Efficient and reversible removal of boric acid by chitosan/tannic acid functional paper

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