Adsorptive removal of 2,4-DCP from water by fresh or regenerated chitosan/ACF/TiO2 membrane

Liu, Lifen; Zhang, Peng Hui; Yang, Feng

doi:10.1016/j.seppur.2009.10.022

Cited by 42 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several intermediates (4-chlorophenol, 1,4-benzoquinone, phenol, and cyclohexanol) were formed during the degradation process in the presence of UV light, and the authors suggested that the major decomposition pathway of 2,4-DCP is linked to the reductive dechlorination and reaction with hydroxyl radicals. Liu et al [95] evaluated the adsorptive removal of 2,4-DCP from water using a CS/activated carbon fiber (ACF)/TiO 2 membrane and reported that the membrane possesses high filtration properties (in static and dynamic modes) and high adsorptive removal of 2,4-DCP using both flux modes. Furthermore, the membrane adsorption capacity can be regenerated by oxidizing adsorbed 2,4-DCP via in situ or off-site photocatalysis and/or Fenton oxidation.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Chitosan-TiO2: A Versatile Hybrid Composite

et al. 2020

View full text Add to dashboard Cite

In recent years, a strong interest has emerged in hybrid composites and their potential uses, especially in chitosan-titanium dioxide (CS-TiO 2 ) composites, which have interesting technological properties and applications. This review describes the reported advantages and limitations of the functionalization of chitosan by adding TiO 2 nanoparticles. Their effects on structural, textural, thermal, optical, mechanical, and vapor barrier properties and their biodegradability are also discussed. Evidence shows that the incorporation of TiO 2 onto the CS matrix improves all the above properties in a dose-dependent manner. Nonetheless, the CS-TiO 2 composite exhibits great potential applications including antimicrobial activity against bacteria and fungi; UV-barrier properties when it is used for packaging and textile purposes; environmental applications for removal of heavy metal ions and degradation of diverse water pollutants; biomedical applications as a wound-healing material, drug delivery system, or by the development of biosensors. Furthermore, no cytotoxic effects of CS-TiO 2 have been reported on different cell lines, which supports their use for food and biomedical applications. Moreover, CS-TiO 2 has also been used as an anti-corrosive material. However, the development of suitable protocols for CS-TiO 2 composite preparation is mandatory for industrial-scale implementation.Materials 2020, 13, 811 2 of 27 they are synthesized by different methods (intercalation of the polymer, sol-gel, hydrothermal, electro-deposition, chemical and physical vapor deposition, suspension and liquid phase deposition). These methods are effective to enhance the technological and mechanical properties of each individual component and also reveal new functionalities [1,3]. Currently, there is a special interest in combining natural polymers such as chitosan (CS) with inorganic materials like titanium dioxide (TiO 2 ) to obtain hybrid composites (CS-TiO 2 ) with beneficial properties [3][4][5][6].Chitosan (CS) is a natural biopolymer (linear polysaccharide comprising 1-4 linked 2-amino-deoxy-β-D-glucan) generally obtained by deacetylation of chitin, the main structural component of crustacean exoskeletons. CS exhibits a poly-cationic character and is non-toxic and biodegradable [7]. CS is considered a biological functional compound with multiple interesting properties. It can form films for food and pharmaceutical applications, including edible coatings, packaging material, or as drug-eluting carrier [5,7]. Its adsorbent capacity can have environmental applications during photocatalytic processes of waste-water treatment [8], and it also has inherent antibacterial and antifungal properties [9]. It is biocompatible with several organic and inorganic compounds by the presence of free amino and hydroxyl functional groups in its structure, which can react with other functional groups by electrostatic forces, hydrogen bonds, or by compound-soak up into the polymeric matrix, thus improving its mechanical and biological properties [10]...

show abstract

Section: Environmental Applicationsmentioning

confidence: 99%

Chitosan-TiO2: A Versatile Hybrid Composite

et al. 2020

View full text Add to dashboard Cite

show abstract

“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13][14] www.deswater.com doi: 10.1080/19443994.2015.1008579 As common environmental pollutants, phenol and phenolic derivatives can disturb the use of water, producing obnoxious odor and taste to drinking water. Moreover, substituted phenols bring lethal effect on human beings even at low concentrations.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Various purification technologies have been reported to keep waters free from phenol and substituted phenols, such as photocatalytic degradation, membrane filtration [4], electrochemical degradation, biological degradation [5], incineration, extraction, and adsorption on activated carbons [6].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Adsorption potential of 2,4-dichlorophenol onto cationic surfactant-modified phoenix tree leaf in batch mode

Ren

Zhang

et al. 2016

Desalination and Water Treatment

View full text Add to dashboard Cite

2015): Adsorption potential of 2,4-dichlorophenol onto cationic surfactant-modified phoenix tree leaf in batch mode, Desalination and Water Treatment, A B S T R A C TIt is essential and important to remove chlorophenols from solution. The natural phoenix tree leaf (NTL) was modified by a cationic surfactant, hexadecylpyridinium chloride monohydrate (CPC), and applied as an adsorbent (modified phoenix trees' leaf (MTL)) to enhance the capability to remove 2,4-dichlorophenol in aqueous solutions. Analysis of elemental composition, SEM and FTIR indicated that CPC was adsorbed on the surface of NTL. 2,4-dichlorophenol (2,4-DCP) was selected as adsorbate and the adsorption experiments were carried out in batch mode. Effects of physical-chemical parameters such as solution pH, coexisted salt, and contact temperature were investigated. The optimum pH was 6.3 and the effect of salt concentration is not significant. The adsorption quantity was up to 188.8 mg g −1 at experimental condition. The equilibrium adsorption data were fitted adequately to Freundlich and Henry isotherms, and the corresponding constants were calculated for these models. In addition, the adsorption kinetic data were analyzed using the pseudo-first-order and pseudo-second-order kinetic equations. The results showed that the pseudo-second-order model was better to fit the experimental data, which indicated that the adsorption of 2,4-DCP was controlled predominantly by a chemical adsorption process. Thermodynamic study suggested that the adsorption of 2,4-DCP on CPC-MTL was an endothermic process. Furthermore, the adsorbed 2,4-DCP was desorbed effectively up to 83% and the exhausted adsorbent could be regenerated and reused, making the adsorption process more feasible and economical. The results indicated that MTL can be used as an efficient adsorbent for the removal of 2,4-DCP from aqueous solutions.

show abstract

“…No matter if adsorption is carried out in statical or dynamical forms, it will gradually reach equilibrium if more contaminated water was treated or more adsorption cycles were conducted without regeneration [48]. So the removal of adsorbed pollutants and the regeneration study of saturated composite were completely necessary.…”

Section: Regeneration Of Dye Loaded Tio 2 @Yeast-carbon Microspheresmentioning

confidence: 99%

Adsorption of Organic Dyes by TiO₂@Yeast‐Carbon Composite Microspheres and Their In Situ Regeneration Evaluation

Zheng

Kaiqiang

et al. 2015

Journal of Nanomaterials

View full text Add to dashboard Cite

TiO2@yeast-carbon microspheres with raspberry-like morphology were fabricated based on the pyrolysis method. The obtained products were characterized by field emission scanning electron microscopy (FE-SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD). Effects of initial dye concentration and contact time on adsorption capacity of TiO2@yeast-carbon for cationic dye methylene blue (MB) and anionic dye congo red (CR) were investigated. Experimental data were described by Langmuir, Freundlich, Temkin, and Koble-Corrigan isotherm models, respectively. It was found that the equilibrium data of MB adsorption were best represented by Koble-Corrigan, and CR adsorption was best described by both Freundlich and Koble-Corrigan isotherm models. The kinetic data of MB and CR adsorption fitted pseudo-second-order kinetic model well. The results demonstrated that TiO2@yeast-carbon microspheres achieved favorable removal for the cationic MB in comparison with that for the anionic CR. In addition, regeneration experimental results showed that TiO2@yeast-carbon exhibited good recycling stability, reusability, and in situ renewability, suggesting that the as-prepared TiO2@yeast-carbon might be used as the potential low cost alternative for recalcitrant dye removal from industrial wastewater. One possible mechanism for regenerating dye-loaded TiO2@yeast in situ was also proposed.

show abstract

Adsorptive removal of 2,4-DCP from water by fresh or regenerated chitosan/ACF/TiO2 membrane

Cited by 42 publications

References 28 publications

Chitosan-TiO2: A Versatile Hybrid Composite

Chitosan-TiO2: A Versatile Hybrid Composite

Adsorption potential of 2,4-dichlorophenol onto cationic surfactant-modified phoenix tree leaf in batch mode

Adsorption of Organic Dyes by TiO₂@Yeast‐Carbon Composite Microspheres and Their In Situ Regeneration Evaluation

Contact Info

Product

Resources

About

Adsorptive removal of 2,4-DCP from water by fresh or regenerated chitosan/ACF/TiO2 membrane

Cited by 42 publications

References 28 publications

Chitosan-TiO2: A Versatile Hybrid Composite

Chitosan-TiO2: A Versatile Hybrid Composite

Adsorption potential of 2,4-dichlorophenol onto cationic surfactant-modified phoenix tree leaf in batch mode

Adsorption of Organic Dyes by TiO2@Yeast‐Carbon Composite Microspheres and Their In Situ Regeneration Evaluation

Contact Info

Product

Resources

About

Adsorption of Organic Dyes by TiO₂@Yeast‐Carbon Composite Microspheres and Their In Situ Regeneration Evaluation