The construction of amorphous metal-organic cage-based solid for rapid dye adsorption and time-dependent dye separation from water

Gao, Yong; Deng, Shu‐Qi; Jin, Xia; Cai, Song‐Liang; Zheng, Sheng‐Run; Zhang, Weiguang

doi:10.1016/j.cej.2018.09.124

Cited by 147 publications

(68 citation statements)

References 73 publications

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“…Percentage removal of dyes was determined using the following equation [28]: Removal efficiency (%)=(C0−Ct)C0×100% where C 0 represents the initial concentration of dye and C t represents the concentration of dye after t minutes. The equilibrium amount of adsorption ( q e ) and the amount of adsorption ( q t ) at given time were calculated according to the following equation [29]: qe=(C0−Ce)×VW qt=(C0−Ct)×VW where C e is the equilibrium concentration of dye (mg/mL), V is the solution volume (mL), and W is the adsorbent mass (g).…”

Section: Methodsmentioning

confidence: 99%

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

et al. 2019

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Metal-organic frameworks (MOFs) are considered as good materials for the adsorption of many environmental pollutants. In this study, magnetic Fe3O4/MIL-88A composite was prepared by modification of MIL-88A with magnetic nanoparticles using the coprecipitation method. The structures and magnetic property of magnetic Fe3O4/MIL-88A composite were characterized and the adsorption behavior and mechanism for Bromophenol Blue (BPB) were evaluated. The results showed that magnetic Fe3O4/MIL-88A composite maintained a hexagonal rod-like structure and has good magnetic responsibility for magnetic separation (the maximum saturation magnetization was 49.8 emu/g). Moreover, the maximum adsorption amount of Fe3O4/MIL-88A composite for BPB was 167.2 mg/g and could maintain 94% of the initial adsorption amount after five cycles. The pseudo-second order kinetics and Langmuir isotherm models mostly fitted to the adsorption for BPB suggesting that chemisorption is the rate-limiting step for this monomolecular-layer adsorption. The adsorption capacity for another eight dyes (Bromocresol Green, Brilliant Green, Brilliant Crocein, Amaranth, Fuchsin Basic, Safranine T, Malachite Green and Methyl Red) were also conducted and the magnetic Fe3O4/MIL-88A composite showed good adsorption for dyes with sulfonyl groups. In conclusion, magnetic Fe3O4/MIL-88A composite could be a promising adsorbent and shows great potential for the removal of anionic dyes containing sulfonyl groups.

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Section: Methodsmentioning

confidence: 99%

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

et al. 2019

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“…The pseudo-second-order model which is expressed by equation 2 (30): t/qt= 1/k2q 2 e+ t/qe (2) Where, k2 is the equilibrium rate constant of pseudo-second-order (g mg −1 min −1 ) which can be determined by the slope and intercept of the plot of t/qt versus t (Fig. 6a,b).…”

Section: Evaluation Of Biosorption Kineticsmentioning

confidence: 99%

“…Dyes that are used in the food, textiles, paper, plastics, cosmetics, pharmaceuticals, and other industries generally have carcinogenic, mutagenic, and teratogenic properties. This is why they can cause serious environmental problems (1,2).…”

Section: Introductionmentioning

confidence: 99%

Biosorption studies of mushrooms for two typical dyes

Yıldırım

Acay

2020

Journal of the Turkish Chemical Society Section A: Chemistry

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This study investigated the adsorption behaviour of two cationic dyes, methylene blue (MB) and malachite green (MG) onto Pleurotus ostreatus, Armillaria tabescens, and Morchella conica mushrooms. The effects of contact time, initial dye concentration, and solution pH (3-11) were also determined. The adsorption on all mushrooms attained equilibrium within 120 min for both MB and MG. To evaluate the experimental kinetics data, the pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetics equations were utilised. The pseudo-first-order kinetic model demonstrated a good fit with all adsorption kinetics. The Langmuir and Freundlich isotherm models were used to analyse the mechanism of the adsorption isotherm. The adsorption equilibrium isotherm was in a good agreement with the Freundlich model. Thermodynamic parameters such as ΔH enthalpy variation, ΔS entropy variation, and ΔG free Gibbs energy variation were calculated at 303-323 K. The results suggested that the Pleurotus ostreatus mushroom was the most suitable adsorbent for both cationic dyes' removal.

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“…In recent years, dye removal from textile wastewater is considered as a critical issue because of the potential environmental hazard and associated difficulties in terms of dye recycling [ 1 ]. Discharging of dye into the environment even at low concentration will endanger aquatic life with a significant reduction in their photosynthetic activity due to the enhanced toxicity in water [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

High-Performance Polyacrylic Acid-Grafted PVDF Nanofiltration Membrane with Good Antifouling Property for the Textile Industry

et al. 2020

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In the textile industry, a high-efficiency dye removal and low-retention of salt is demanded for recycling wastewater. In this study, polyvinylidene fluoride (PVDF) ultrafiltration membrane was transformed to a negatively charged loose nanofiltration (NF) membrane through UV-grafting of acrylic acid. At the optimal exposure of PVDF membrane in UV light for 5 min, the membrane had a high dye recovery above 99% (Congo red and Eriochrome® Black T) and a low sodium chloride (NaCl) rejection of less than 15% along with pure water flux of 26 L∙m−2∙h−1∙bar−1. Its antifouling and oleophobicity surface properties were verified using fluorescent- bovine serum albumin (BSA) and underwater mineral oil contact angle, respectively. According to the fluorescent microscopic images, the modified membrane had ten times lower adhesion of protein on the surface than the unmodified membrane. The underwater oil contact angle was raised from 110° to 155°. Moreover, the salt rejection followed this sequence: Na2SO4 > MgSO4 > NaCl > MgCl2, which agreed with the typical negatively charged NF membrane. In addition, the physicochemical characterization of membranes was further investigated to understand and link to the membrane performance, such as surface functional group, surface elements analysis, surface roughness/morphology, and surface hydrophilicity.

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The construction of amorphous metal-organic cage-based solid for rapid dye adsorption and time-dependent dye separation from water

Cited by 147 publications

References 73 publications

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

Preparation of Magnetic Fe3O4/MIL-88A Nanocomposite and Its Adsorption Properties for Bromophenol Blue Dye in Aqueous Solution

Biosorption studies of mushrooms for two typical dyes

High-Performance Polyacrylic Acid-Grafted PVDF Nanofiltration Membrane with Good Antifouling Property for the Textile Industry

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