Advanced applications of Zr-based MOFs in the removal of water pollutants

Yuan, Ning; Gong, Xin-Rui; Sun, Wenduo; Yu, Caihong

doi:10.1016/j.chemosphere.2020.128863

Cited by 106 publications

(41 citation statements)

References 143 publications

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“…The sorption amount reached a plateau in 2 h for Sr 2+ with the value of approximately 40 mg g −1 . It is known that the presence of carboxyl groups increases the defect concentration of the UiO-66 structure, producing a negative charge in acidic conditions, [28,37,38] therefore electrostatic attractions exist and contribute to a fast equilibrium adsorption process. While the zeta-potential value before and after adsorption were −31.7 and −33 mV, respectively (see Table S2), indicating the absence of the electronic interaction with cationic at room temperature.…”

Section: Resultsmentioning

confidence: 99%

The Carboxyl Functionalized UiO-66-(COOH)2 for Selective Adsorption of Sr2+

et al. 2022

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Efficient and selective removal of 90Sr is an important process for the safe use of nuclear energy. Herein, we investigate and assess the Sr2+ adsorption properties of a metal-organic framework UiO-66-(COOH)2 functionalized by non-bonded carboxylic groups. This MOF is an exciting class of free carboxylic functionalized MOFs that combine chemical stability with gas sorption, dye elimination, and conductivity. Specifically, we show that uniformly distributed carboxyl and water stability make it accessible for loading Sr2+ without structural changes. The FTIR spectroscopy, PXRD analysis, XPS, and SEM-EDS studies show excellent stability as well as the strong affinity between -COOH active site and Sr2+. This strong coordination interaction guarantees a high adsorption capacity of 114 mg g−1 within 5 h (pH 5 and 298 K). Combined kinetic and thermodynamic studies show that the surface complexation is strong chemisorption and cost-effective spontaneous process (ΔG = −5.49 kJ mol−1~−2.16 kJ mol−1). The fact that UiO-66-(COOH)2 not only possesses a high adsorption capacity, but also enables selectivity to Sr2+ in the presence of similar radius ions Na+ and K+, prefigures its great potential for the practical treatment of radioactive Sr2+ in polluted water.

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Section: Resultsmentioning

confidence: 99%

The Carboxyl Functionalized UiO-66-(COOH)2 for Selective Adsorption of Sr2+

et al. 2022

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“…A series of enantiomorphic Pb-based metal-organic coordination polymers, i.e., 6-bis(alanyl)), had been synthesized through the solvothermal reactions [17]. Compounds R1 and S1 crystallized in the chiral space group, P212121, revealing infinite unidimensional (1D) chain structures.…”

Section: Adsorbents For the Removal Of Anionic Dyes From Watersmentioning

confidence: 99%

“…The importance of these adsorptive methodologies in the removal of organic dyes from waters is reflected in the number of investigations and reviews published in the years. Recently, several reviews about the use of a given type of adsorbents in this role have been published, including silica-based mesoporous materials of the M41S and SBA-n families [ 1 ], different types of graphene-based materials [ 2 , 3 ], biochars [ 4 ], metal–organic frameworks (MOF) [ 5 , 6 ], various types of polymeric nanofibers [ 7 ], metal-doped porous carbon materials [ 8 ], and activated carbon fibers [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Organic Dyes versus Adsorption Processing

López

2021

Molecules

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Even in the first quarter of the XXI century, the presence of organic dyes in wastewaters was a normal occurrence in a series of countries. As these compounds are toxic, their removal from these waters is a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of the 2021 year) regarding the use of a variety of adsorbents in the removal of a variety of organic dyes of different natures.

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“…5) and the Langmuir isotherm (eq. 6): (6) where [CR] represented the Congo red concentration. Desorption was carried out, as literally written in the published article " ….contained a certain proportion of water/ ethanol (45%) and a few drops of 1 M NaOH solution during one hour".…”

Section: Adsorptionmentioning

confidence: 99%

“…The importance of these adsorptive methodologies on the removal of organic dyes from waters is reflected in the number of investigations and reviews published along the years. Recently, several reviews about the use of a given type of adsorbents in this role, included silica-based mesoporous materials of the M41S and SBA-n families [1], different types of graphene-based materials [2,3], biochars [4], metal-organic frameworks (MOF) [5,6], various types of polymeric nanofibers [7], metal-doped porous carbon materials [8], and activated carbon fibers [9] The present work reviews very recent publications (first half of 2021 year) about the use of adsorbents in the removal of organic dyes from waters, in many cases, the investigations are carried out on synthetic solutions, but there are some examples in which adsorbents are used on real waters. Readers must be aware that this review does not include publications about desorption-degradation processing of these toxic chemicals.…”

Section: Introductionmentioning

confidence: 99%

Organic Dyes Versus Adsorption Processing

López

2021

Preprint

View full text Add to dashboard Cite

Even in the first quarter of XXI century, the presence of organic dyes in wastewaters is a normal occurrence in a series of countries, and being these compounds toxics, their removal from these waters is of a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of 2021 year) about the use of a variety of adsorbents on the removal of, also, a variety of organic dyes of different nature.

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Advanced applications of Zr-based MOFs in the removal of water pollutants

Cited by 106 publications

References 143 publications

The Carboxyl Functionalized UiO-66-(COOH)2 for Selective Adsorption of Sr2+

The Carboxyl Functionalized UiO-66-(COOH)2 for Selective Adsorption of Sr2+

Organic Dyes versus Adsorption Processing

Organic Dyes Versus Adsorption Processing

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