Peroxo and gold modified titanium nanotubes for effective removal of methyl orange with CWPO under ambient conditions

Drašinac, Nina; Erjavec, Boštjan; Dražić, Goran; Pintar, Albin

doi:10.1016/j.cattod.2016.06.038

Cited by 11 publications

(9 citation statements)

References 36 publications

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“…Orange III (4‐(4‐dimethylaminophenylazo) sodium benzenesulfonate, NaC 14 H 14 N 3 O 3 S, color index number = 13 025, M = 327.3 g mol −1 , λ max = 463 nm) solution with a concentration of 30 μM (10 mg L −1 ) was used in the experiments (TOC 0 = 5.3 ± 1.1 mg L −1 ). This concentration of Orange III was chosen as it falls within the range typically observed for wastewater . The concentrations of both potassium persulfate and iron(II) sulfate were 180 μM.…”

Section: Methodsmentioning

confidence: 99%

UV‐Activated Persulfate Oxidation of Orange III Dye Using KrCl Excilamp

Sizykh

Батоева

Tsydenova

2018

CLEAN Soil Air Water

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The paper demonstrates the possibility of using UV radiation of KrCl excilamps to activate persulfate (PS) in advanced oxidation processes. The model compound—the dye Orange III—is subjected to treatments involving UV radiation, persulfate, and/or ferrous ion, alone or in combinations. According to Orange III oxidation efficiency, the tested oxidative systems can be arranged in the following order: PS/UVex/Fe2+ > PS/UVex > PS/Fe2+ > UVex > PS. Furthermore, the energy efficiencies of the oxidative systems enhanced by UV radiation from a KrCl excilamp (222 nm) and a low‐pressure mercury lamp (254 nm) are compared. The highest energy efficiency and mineralization are achieved by activating persulfate with a combination of a transition metal (Fe2+) and UV radiation of a KrCl excilamp.

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Section: Methodsmentioning

confidence: 99%

UV‐Activated Persulfate Oxidation of Orange III Dye Using KrCl Excilamp

Sizykh

Батоева

Tsydenova

2018

CLEAN Soil Air Water

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“…Au/Al 2 O 3 permitted total discoloration and TOC removal of about 80%, combining further formation of hydroxyl radicals [110]. In the same way, Drašinac et al [107] observed that the morphological properties of the catalysts and gold properties played an important role in methyl orange (MO) dye degradation. These authors reached the best CPWO performance (removals of 83 and 85% for TOC and MO dye, respectively) with gold supported on modified titanium nanotubes with a gold nanoparticle size of 7 nm and 1.1 wt.% loading, which had the highest total pore volume (1.31 cm 3 /g), pore diameter (14.8 nm), and surface area (335 m 2 /g).…”

mentioning

confidence: 88%

“…The degradation of methyl orange decreased from~40 to~10% when the gold loading increased from 1.0 to 4.0 wt.%, in a study dealing with the removal of this dye by CWPO, at 25 • C, using gold supported on modified titanium nanotubes [107]. The authors attributed this decreased of process efficiency to the fact that the catalyst with lower gold content had a smaller particle size and gold was uniformly distributed on the surface of the support [107].…”

Section: Influence Of the Catalyst Propertiesmentioning

confidence: 99%

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

et al. 2019

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Nowadays, there is an increasing interest in the development of promising, efficient, and environmentally friendly wastewater treatment technologies. Among them are the advanced oxidation processes (AOPs), in particular, catalytic wet peroxidation (CWPO), assisted or not by radiation. One of the challenges for the industrial application of this process is the development of stable and efficient catalysts, without leaching of the metal to the aqueous phase during the treatment. Gold catalysts, in particular, have attracted much attention from researchers because they show these characteristics. Recently, numerous studies have been reported in the literature regarding the preparation of gold catalysts supported on various supports and testing their catalytic performance in the treatment of real wastewaters or model pollutants by CWPO. This review summarizes this research; the properties of such catalysts and their expected effects on the overall efficiency of the CWPO process, together with a description of the effect of operational variables (such as pH, temperature, oxidant concentration, catalyst, and gold content). In addition, an overview is given of the main technical issues of this process aiming at its industrial application, namely the possibility of using the catalyst in continuous flow reactors. Such considerations will provide useful information for a faster and more effective analysis and optimization of the CWPO process.

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“…In batch ion exchange-adsorption experiments, the stirring speed could play a key-role in the performance of the system, since the correct stirring speed allows to gain a maximum in the metal loaded in the corresponding solid resin-adsorbent; however, this variable is often neglected in many scientific reports (AlOmar et al, 2017;Drasinac et al, 2017;Kim and Kwak, 2017;Ogden et al, 2017;Wang and Liu, 2017). In the present work, aqueous solutions containing 0.01 gL -1 Ni(II) at pH 5 was put into contact with 0.5 gL -1 of the resin, and the system was stirred at different stirring speeds ranging 200-1000 rpm.…”

Section: Nickel Loading Onto the Resinmentioning

confidence: 99%

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte V: níquel(II))/H<sup>+</sup>/Dowex C400

Alguacil

2017

REVMETAL

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ABSTRACT:The cationic exchange resin Dowex C400 was used to remove nickel(II) from aqueous solutions of different pH values and under various experimental conditions: stirring speed of the aqueous solution/resin system, temperature, resin dosage and aqueous ionic strength. The selectivity of the resin was investigated against the presence of various metals in the aqueous solution, and the removal of nickel(II) from aqueous solutions was also compared with results obtained using multiwalled carbon nanotubes or functionalized (carboxylic groups) multiwalled carbon nanotubes as adsorbents. According to batch experimental data, best fit of the results is obtained with the Freundlich model, whereas the ion exchange process is best explained by the pseudofirst order model. Experimental data fit well to the moving boundary controlled model. Elution of the nickel(II) loaded onto Dowex C400 resin is fully possible using acidic solutions. RESUMEN: La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico.Parte V: níquel(II))/H+/Dowex C400. Se ha empleado la resina de intercambio catiónico Dowex C400 en la eliminación de níquel(II) de disoluciones acuosas de distintos valores de pH y en varias condiciones experimentales: velocidad de agitación del sistema acuoso/resina, temperatura, dosificación de la resina y disoluciones acuosas de distinta fuerza iónica, investigándose la eliminación del níquel de medios acuosos que contenían varios metales, así como las posibilidades de la resina frente a la utilización de otros potenciales adsorbentes como son los nanotubos de carbono de pared múltiple y los nanotubos de carbono de pared múltiple funcionalizados con grupos carboxílicos. Los resultados experimentales indican que la carga del níquel(II) en la resina responde al modelo de Freundlich, mientras que los modelos cinéticos y de control indican que el proceso de intercambio catiónico responde al modelo de pseudo-primer orden y núcleo recesivo. La elución del níquel(II) se realiza con disoluciones acidas.PALABRAS CLAVE: Dowex C400; Efluentes líquidos; Eliminación; Níquel(II); Nanotubos de carbono de pared múltiple ORCID ID: Francisco J. Alguacil (http://orcid.org/0000-0002-0247-3384)

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Peroxo and gold modified titanium nanotubes for effective removal of methyl orange with CWPO under ambient conditions

Cited by 11 publications

References 36 publications

UV‐Activated Persulfate Oxidation of Orange III Dye Using KrCl Excilamp

UV‐Activated Persulfate Oxidation of Orange III Dye Using KrCl Excilamp

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte V: níquel(II))/H<sup>+</sup>/Dowex C400

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