Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Xu, Zhan; Tsai, Fang‐Chang; Xie, Lei; Zhang, Ke-Deng; Liu, Huanli; Ma, Ning; Shi, Dean; Jiang, Tao

doi:10.3390/nano8090655

Cited by 44 publications

(17 citation statements)

References 55 publications

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“…The adsorption capability increased, and the removal efficiency decreased with increasing primary dye concentration (Figure 11c,d), indicating that the dye removal is concentration dependent. Similar results were obtained by Mohammadi [ 43 ] and Zhan [ 44 ] for other MOF materials.…”

Section: Resultssupporting

confidence: 90%

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Nistor

Muntean

Maranescu

et al. 2020

Applied Organom Chemis

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A very intense study class of complex porous materials, metal-organic frameworks (MOFs), composed of diverse central metallic ions attached to organic linkers, was used in this study as adsorbant materials from wastewaters. Phosphonate MOFs were prepared by the reaction of divalent inorganic salts (CoSO 4 Á7H 2 O, NiSO 4 Á6H 2 O, CuSO 4 Á5H 2 O,) with vinyl phosphonic acid in hydrothermal conditions, obtaining cobalt, nickel, and copper vinylphosphonate (CoVP, NiVP, and CuVP). During synthesis the experimental conditions were varied in terms of time, temperature, and pH. The synthesized materials were characterized by Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, and X-ray crystallography. The efficiency of MOFs as adsorbents was investigated for diverse initial dye concentrations at different pH values and at three temperatures (25, 40, and 55 C). The synthesized materials presented good efficiency in the elimination of anionic as well as cationic type of dyes from aqueous solutions. The highest adsorption capacities were obtained working at optimum solution pH 4.2 for Acid Orange 7 and 10 for Basic Fuchsine, using 1 g/L of MOFs at room temperature (25 C). The adsorption capacities increase in the following order: CuVP < NiVP < CoVP. K E Y W O R D S adsorption, dyes removal, phosphonate metal organic frameworks 1 | INTRODUCTION Industry is a huge source of water pollutants such as toxic materials, rare earth elements, and organic dyes, which are extremely harmful for people, animals, and the environment. [1-4] Worldwide, water pollution become a major environmental problem because of rapid industrialization and urbanization. [5] Pollutants from the leather, plastic, textile, paper, rubber, cosmetic, and food industries can harm environmental protection, living organisms, and global ecosystems if no suitable treatments are available. About 10-15% of commercial dyes formed from the textile industries are let out into the environment every year. [6,7] Organic dyes do not decompose readily under normal conditions because of their stable and complex chemical structures. Most of these dyes are toxic and carcinogenic. [6,8-10] Dyes are mostly stable to light, oxidizing agents, and heat, and are very soluble in water. [11] The direct release of colored wastewater into the environment disturbs its ecological status by causing numerous undesirable changes. [8,11] As regulation has become stricter, significant importance has been given to the treatment of dye-containing wastewaters. [5,12] Therefore, the

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Section: Resultssupporting

confidence: 90%

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Nistor

Muntean

Maranescu

et al. 2020

Applied Organom Chemis

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“…Acid Orange 7 (AO7) was used as an example of an azo dye [ 21 ]. The amount of the absorbed dye of UiOs was examined and it was 176 and 235 mg g −1 for UiO-66 and UiO-67, respectively [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Carbonized Lanthanum-Based Metal-Organic Framework with Parallel Arranged Channels for Azo-Dye Adsorption

2020

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In this contribution, the synthesis of the metal−organic framework (MOF) based on lanthanum that exhibits trigonal prism shape is presented. The length of a single side of this structure ranges from 2 to 10 μm. The carbonized lanthanum-based organic framework (CMOF–La) maintained the original shape. However, the lanthanum oxide was reshaped in the form of rods during the carbonization. It resulted in the creation of parallel arranged channels. The unique structure of the carbonized structure motivated us to reveal its adsorption performance. Therefore, the adsorption kinetics of acid red 18 onto a carbonized metal−organic framework were conducted. Various physicochemical parameters such as initial dye concentration and pH of dye solution were investigated in an adsorption process. The adsorption was found to decrease with an increase in initial dye concentration. In addition, the increase in adsorption capacity was noticed when the solution was changed to basic. Optimal conditions were obtained at a low pH. Kinetic adsorption data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. The adsorption kinetics were well fitted using a pseudo-second-order kinetic model. It was found that the adsorption of anionic dye onto CMOF–La occurs by hydrophobic interactions between carbonized metal-organic framework and acid red 18.

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“…This is possibly attributed to the presence of the pore structure of UiO-66 nanoparticles, which facilitate water transport through their channels [36]. Notably, the size of these channels is approximately 6 Å [37]. This size allows a sufficient efficiency of the separation via ionic sieving [38].…”

Section: Desalination Performance Of the Prepared Membranesmentioning

confidence: 99%

Preparation and Desalination Performance of PA/UiO-66/PES Composite Membranes

et al. 2021

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UiO-66 nanoparticles are considered highly potential fillers for the application in desalination membranes. In this study, UiO-66 nanoparticles were anchored to PES membrane substrates, which were subsequently subjected to the interfacial polymerization reaction to coat a layer of polyamide (PA) on their surface. For comparison, a blank membrane incorporating no UiO-66 and a reference membrane incorporating ZrO2 (instead of UiO-66) were prepared. All prepared membranes were tested for their desalination performance. The membranes containing UiO-66 were found to outperform the blank and the reference counterparts. The reason for this outperformance is possibly attributed to the hydrophilicity of UiO-66 nanoparticles and the presence of nanochannels in their structure.

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Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Cited by 44 publications

References 55 publications

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Carbonized Lanthanum-Based Metal-Organic Framework with Parallel Arranged Channels for Azo-Dye Adsorption

Preparation and Desalination Performance of PA/UiO-66/PES Composite Membranes

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