Efficient removal of Orange G using Prussian Blue nanoparticles supported over alumina

Doumic, Lucila I.; Salierno, Gabriel; Cassanello, Miryan; Haure, Patricia M.; Ayude, María Alejandra

doi:10.1016/j.cattod.2014.03.064

Cited by 37 publications

(21 citation statements)

References 19 publications

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“…Important differences are observed between these results and those of the control trials as shown in Table 4. This difference in the results of the adsorption test corresponds to differences in a number of compounds adsorbed on the surface of the catalyst, before and after impregnation of the active phase [28]. Several authors attribute this high amount of organic adsorbed compounds onto the active phase/ γ-Al 2 O 3 system to the crystalline structure of the active phase (dependent on the impregnated copper load and the calcination temperature), which could exhibit vacant, to accommodate neutral molecules or compounds with anionic characteristics, while γ-Al 2 O 3 has a virtually zero adsorption capacity [72].…”

Section: Estimation Of Toc Reduction By Adsorptionmentioning

confidence: 99%

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Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

et al. 2018

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This work proposes a kinetic model for the reactions involved in the heterogeneous copper-based Fenton-type oxidation of mixed recalcitrant compounds in a real industrial effluent from the alkaline sulfite treatment of wood. This kind of treatment is unusual in this industry due to the complexity of the effluents and the high costs involved in total mineralization of the organic matter. Nevertheless, conversion of recalcitrant to degradable compounds and catalyst recovery can make the difference. The complexity of the effluent and the great number of compounds formed as intermediates, make extremely difficult the identification and quantification of the individual reactions that occur during oxidation. To solve this drawback TOC parameter was used as a representative measurement. To verify the level of TOC degradation produced by the heterogeneous catalysis reaction, experiences of homogeneous catalysis and adsorption were accomplished. The studied temperature range was 45-80 °C. A "two-step" kinetic model was applied to TOC reduction in heterogeneous and homogeneous oxidations, admitting two sequential steps of oxidation: a first fast stage ("seconds stage") followed by a slow one ("minutes stages"). Kinetic constants were obtained for both processes and activation energies were also determined for the "minutes stage" step (33.17 kJ/mol and 15.13 kJ/mol, respectively). Homogeneous catalysis studies confirm mass transfer limitations in heterogeneous oxidations. Experiences of adsorption of organic matter on CuO/γ-Al 2 O 3 catalyst demonstrated that this phenomenon is exothermic and cannot be neglected. The activation energy of adsorption was determined as 7.32 kJ/mol. Catalysts were characterized through SEM, EDS, XRD, FTIR, and TGA. Graphical Abstract

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Section: Estimation Of Toc Reduction By Adsorptionmentioning

confidence: 99%

“…Adsorption on the support as result of attractive forces is always possible [28], so it is also important to verify whether TOC reduction is only produced by oxidation or if there is any adsorption component, and how it varies at different temperature and pH conditions.…”

Section: Introductionmentioning

confidence: 99%

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

et al. 2018

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“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] www.deswater.com doi: 10.1080/19443994.2015.1074621 can also induce skin cancer and allergies even at low concentrations [6,7]. To alleviate environmental damages and improve water quality, a lot of techniques have been recently employed to remove hazardous dyes from waste effluents [8,9].…”

Section: Desalination and Water Treatmentmentioning

confidence: 98%

“…Techniques such as electrochemical [10], biological treatment [9], solvent extraction [11], oxidation [12], and adsorption [13] have been used to remove dyes from aqueous effluents. However, the most preferred method for wastewater treatment is the adsorption technique because of its simplicity, rapidness, effectiveness, cheapness, and availability of low-cost adsorbents [14][15][16].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Bazzo

Adebayo

Dias

et al. 2016

Desalination and Water Treatment

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2015): Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions, Desalination and Water Treatment,This study presents removal of crystal violet (CV) dye from aqueous solutions using solid food waste, avocado kernel seed powder (ASP). ASP was used in the native form for biosorption study. The effects of different experimental conditions such as pH of the solution, initial dye concentration, contact time, and temperature were investigated using batch study. Maximum removal of CV (95.9 mg g −1 ) by ASP (100 mg) was observed at pH 7 and 55˚C. The kinetics data were evaluated using pseudo-first-order, pseudo-second-order, and general-order kinetic adsorption models. The general-order kinetic adsorption model gave the best description of the biosorption kinetic of CV onto ASP biosorbent. Similarly, the intraparticle diffusion plots showed three linear portions during biosorption process. Freundlich, Langmuir, and Liu models were used to analyze the isothermal data; Liu equilibrium model gave the best fit of the isothermal data of CV biosorption onto ASP. The calculations from thermodynamic studies showed that CV biosorption onto ASP was an exothermic process and a feasible process. The combined data showed that avocado seed powder could be efficiently utilized for the treatment of dyes-rich wastewaters.

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“…6,7 However, typical PB NPs prepared by nanoprecipitation have intrinsic problems of aggregation and dissolution in aqueous solution, especially in alkaline media, 8,9 which limit their direct use in the large-scale environmental remediation. To meet the dilemma, PB NPs have been stabilized on a variety of materials, such as mesoporous silica, 10 g-Al 2 O 3 , 11 chitin, 12,13 CNTs, 14,15 rGO, 16 etc. Among these supports, the appropriate matrix with tunable structures and high-quality functions become very attractive since it can not only protect PB NPs against instability and agglomeration but also enable integration characteristics to extend potential of the hybrids.…”

Section: Introductionmentioning

confidence: 99%

Microbial synthesis of hollow porous Prussian blue@yeast microspheres and their synergistic enhancement of organic pollutant removal performance

Chen

Bai

et al. 2019

RSC Adv.

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Efficient removal of Orange G using Prussian Blue nanoparticles supported over alumina

Cited by 37 publications

References 19 publications

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Microbial synthesis of hollow porous Prussian blue@yeast microspheres and their synergistic enhancement of organic pollutant removal performance

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