Enhanced photocatalytic degradation of tetracycline and real pharmaceutical wastewater using MWCNT/TiO2 nano-composite

Ahmadi, Mehdi; Motlagh, Hojjatallah Ramezani; Mostoufi, Azar; Saeedi, Reza; Barzegar, Gelavizh; Jorfi, Sahand

doi:10.1016/j.jenvman.2016.09.088

Cited by 341 publications

(125 citation statements)

References 35 publications

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“…No previous publications applied composite materials for the treatment of pollutants in RO concentrate. A few cycles of pollutant removal were carried out in studies using TiO2-coconut shell powder composite [47], polyacrylic acid-grafted-carboxylic graphene/titanium nanotube composite [48], multi-walled carbon nanotubes/Fe3O4 composites [49], multi-walled carbon nanotube/TiO2 composites [50] and nitrogen-doped-TiO2/activated carbon composite [51] similar to that in this study. The stability of the photocatalyst and reusability of these materials were confirmed, thus making them promising cost-effective water purification materials.…”

Section: Cyclic Use Of the Hsz-385/p25 Composite Sheetmentioning

confidence: 99%

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

et al. 2017

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Abstract:Reverse osmosis (RO) concentrate from wastewater reuse facilities contains concentrated emerging pollutants, such as pharmaceuticals. In this research, a paper-like composite sheet consisting of titanium dioxide (TiO 2 ) and zeolite was synthesized, and removal of the antipruritic agent crotamiton from RO concentrate was studied using the TiO 2 /zeolite composite sheet. The RO concentrate was obtained from a pilot-scale municipal secondary effluent reclamation plant. Effective immobilization of the two powders in the sheet made it easy to handle and to separate the photocatalyst and adsorbent from purified water. The TiO 2 /zeolite composite sheet showed excellent performance for crotamiton adsorption without obvious inhibition by other components in the RO concentrate. With ultraviolet irradiation, crotamiton was simultaneously removed through adsorption and photocatalysis. The photocatalytic decomposition of crotamiton in the RO concentrate was significantly inhibited by the water matrix at high initial crotamiton concentrations, whereas rapid decomposition was achieved at low initial crotamiton concentrations. The major degradation intermediates were also adsorbed by the composite sheet. This result provides a promising method of mitigating secondary pollution caused by the harmful intermediates produced during advanced oxidation processes. The cyclic use of the HSZ-385/P25 composite sheet indicated the feasibility of continuously removing crotamiton from RO concentrate.

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Section: Cyclic Use Of the Hsz-385/p25 Composite Sheetmentioning

confidence: 99%

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

et al. 2017

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“…Considering the above-mentioned statements 7 , the removal of toxic heavy metals in an environmentally friendly and cost-effective manner is very important 2 . The use of adsorbents such as activated carbon, inorganic materials such as zeolite and clay, biological adsorbents and industrial wastes for removal of metal ions has been increasingly studied 8,9 . In recent years, researchers have paid considerable attention on the use of natural wastes as an effective alternative for adsorption of heavy metals 2 .…”

mentioning

confidence: 99%

Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics

Jorfi

Ahmadi

Pourfadakari

et al. 2017

Polish Journal of Chemical Technology

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The main aim of this study was to evaluate the effi ciency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modifi cation of adsorbent, the effect of operational parameters including pH (2-10), adsorbent dosage (2-20 g/L), contact time (5-150 min) and Cr(VI) concentration (10-50 mg/L) were studied according to one-factor-at-a-time procedure. The maximum Cr(VI) removal of 99.53% was obtained at initial pH of 2, contact time of 30 min, adsorbent dosage of 8 g/L and initial chromium concentration of 10 mg/L. The Freundlich isotherm was best fi tted with experimental data (R2 = 0.951). Also, type 1pseudo second order kinetic model showed the most correlation (R2 = 1) with the experimental data. According to obtained results, it can be concluded that the application of clay-like adsorbents such as natural clinoptilolite zeolite can be considered as an effi cient alternative for fi nal treatment of effl uents containing Cr(VI).

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“…[40][41][42][43][44][45][46][47] Among the reports, the photocatalytic degradation of 4-chlorophenol, [41] nitrobenzene, [42] and benzene; [43] the photocatalytic degradationo fd yes such as methylene blue (MB), [43,44,46] methyl orange (MO), [45] and RhB; [44,47] and photocatalytic hydrogen evolution [44,45] have been described. [40][41][42][43][44][45][46][47] Among the reports, the photocatalytic degradation of 4-chlorophenol, [41] nitrobenzene, [42] and benzene; [43] the photocatalytic degradationo fd yes such as methylene blue (MB), [43,44,46] methyl orange (MO), [45] and RhB; [44,47] and photocatalytic hydrogen evolution [44,45] have been described.…”

Section: Titaniumd Ioxide/graphene/carbon Nanotubes Nanostructuresmentioning

confidence: 99%

Graphitic Carbon Nitride and Titanium Dioxide Modified with 1 D and 2 D Carbon Structures for Photocatalysis

et al. 2018

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Enhancing the photocatalytic performance of graphitic carbon nitride (g-C N , GCN) and titanium dioxide (TiO ) has played a key role in the energy and environmental protection research community. Therefore, it is necessary to explore the synergy of both materials with carbon nanostructures for photocatalysis. Among the variety of carbon materials, graphene flakes and nanotubes, as nanoadditives to improve electron charge transfer and the optical absorption behavior in the visible-light region, have been widely explored. Thus, flake-like (2 D) and tubular (1 D) carbon structures in composition with GCN and/or TiO are reviewed, as are their photocatalytic response. Current trends clearly indicate that this type of molecular hybrids can be efficiently exploited in this field. This Minireview covers state-of-the-art research over the period of 2015 to 2018.

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Enhanced photocatalytic degradation of tetracycline and real pharmaceutical wastewater using MWCNT/TiO2 nano-composite

Cited by 341 publications

References 35 publications

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics

Graphitic Carbon Nitride and Titanium Dioxide Modified with 1 D and 2 D Carbon Structures for Photocatalysis

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