Engineering TiO2 supported CTAB modified bentonite for treatment of refinery wastewater through simultaneous photocatalytic oxidation and adsorption

Ulhaq, Ihtisham; Ahmad, Waqas; Ahmad, Imtiaz; Muhammad, Yaseen; Ilyas, Mohammad

doi:10.1016/j.jwpe.2021.102239

Cited by 30 publications

(9 citation statements)

References 56 publications

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“…As can be seen, NaTaO 3 has a broad band between 500 cm −1 and 800 cm −1 , attributed to Ta-O stretching and Ta-O-Ta bridging stretching mode [30,36]. For CTAB, the peak at 2916 cm −1 and 2848 cm −1 corresponds to asymmetric and symmetric vibrations of -(CH 2 )-respectively, while the peaks at 1472 cm −1 and 1383 cm −1 are attributed to asymmetric and symmetric -C-H vibrations of the quaternary ammonium moiety, respectively [17,37,38]. When analyzing the spectra of AgBr and Br/NTO(20%), it can be seen that both have the same peaks indicated for CTAB, which confirms that both materials have an undetermined amount of CTAB on their surface.…”

Section: Photocatalytic Properties Of the Synthesized Samplesmentioning

confidence: 99%

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Puga

Navı́o

Hidalgo

2022

Photochem Photobiol Sci

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AgBr/NaTaO3 composites, with different molar % of NaTaO3 (Br/NTO(X%)), have been synthesized by simple precipitation methods; bare NaTaO3 was synthesized by hydrothermal procedure, while AgBr was synthesized by a precipitation procedure using cetyl-tri-methyl-ammonium bromide (CTAB) and AgNO3. Samples have been characterized by X-ray diffraction (XRD), N2 adsorption, UV–vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Photocatalytic activity of the as-prepared photo-catalysts was evaluated through photocatalytic degradation of rhodamine B (RhB), methyl orange (MO) and caffeic acid (CAFA) under UV and visible illumination. Single AgBr material and Br/NTO(X%) composites displayed the ability to absorb light in the visible region, while NaTaO3 is only photoactive under UV irradiation. Based on the position of conduction and valence bands of AgBr and NaTaO3, the heterojunction between these two photo-catalysts corresponds to a type II junction. In the case of photocatalytic degradation of RhB and CAFA, Br/NTO(x%) composites have highest photocatalytic activity than that obtained by both parental materials under the same operational conditions. AgBr and Br/NTO(x%) composites achieve a fast degradation of MO, together with a considerable adsorption capacity, attributed to the presence of a remaining amount of residual CTAB on the AgBr surface. In summary, coupling AgBr with NaTaO3 improves the photocatalytic activity under both UV and visible illumination with respect to the parental components, but the performance of the composites is highly dependent on the type of substrate to be degraded and the illumination conditions.

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Section: Photocatalytic Properties Of the Synthesized Samplesmentioning

confidence: 99%

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Puga

Navı́o

Hidalgo

2022

Photochem Photobiol Sci

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“…Heavy metals are common pollutants found in various industrial effluents, which have represented a serious threat to the environment and the human being because of their toxic and lethal effects, and adsorption technique is a promising method that is very important to remove the refractory pollutants from solution system because of its facile operation processes and high efficiency. Therefore, efficient adsorbents become the decisive factor in the adsorption process of heavy metals ions, and the researches on exploring the novel adsorbents with high efficiency for heavy metals adsorption become very essential 4–15 . The development of double network polymer adsorbents for heavy metals adsorption, generally which are prepared by using poly‐blending two kinds of polymer precursor, is highly desirable and is a main challenge in recent years 16–18 .…”

Section: Introductionmentioning

confidence: 99%

Construction of a novel double network polymer composite and evaluation of its highly efficient adsorption properties for copper ions

Song

Yin

et al. 2022

J of Applied Polymer Sci

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To explore more efficient heavy metal copper ions adsorbents with double network polymers, this work has presented the novel fabrication processes of the polymer composite diatomaceous earth/polydopamine‐polyethyleneimine/alginate DE@PDA‐PEI@SA, which was characterized by FT‐IR, SEM, EDS, XPS, and was efficiently utilized for copper ions adsorption. The relevant adsorption behaviors of DE@PDA‐PEI@SA for copper ions such as the effect of pH, the effect of adsorbent dosage, adsorption kinetics, adsorption isotherm etc. have been investigated. The results reveal that the adsorption kinetics of DE@PDA‐PEI@SA for copper ions at different temperatures can be modeled by the pseudo second‐order rate equation, the experimental data fit well with the Langmuir isotherm model, indicating a homogeneous monolayer adsorption, and the maximum adsorption capacity of DE@PDA‐PEI@SA for copper ions could reach 454.55 mg/g at 35°C that is very high compared to other reported adsorbent materials. The research results indicate that DE@PDA‐PEI@SA is a novel efficient adsorbent with high efficiency in wastewater treatment and water purification, which could provide a facile processing for copper adsorption.

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“…So, effective and practical wastewater treatment methods for petroleum refineries are necessary. Biodegradation [8,9], ultrafiltration [10], adsorption [11], and coagulation [12] are some of these processes. The techniques used in electrochemical processes include electroflotation (EF) [13], Electro-fenton Oxidation (EO) [14], electrocoagulation (EC) [12], and sequential EC and EO processes [15].…”

Section: Introductionmentioning

confidence: 99%

Refinery Wastewater Treatment by a Novel Three-Dimensional Electrocoagulation System Design

Theydan¹,

Mohammed²

2022

Eng. Technol. Appl. Sci. Res.

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A novel three-dimensional electrocoagulation method was used in the current work to explore the treatment of refinery wastewater. Metal-Impregnated Granular Activated Carbon (MIGAC) was employed as a third particle electrode in the inventive design. A comprehensive investigation has been conducted to evaluate its performance. BET-specific surface area, total pore volume, X-ray Fluorescence (XRF), Energy-Dispersive X-ray spectroscopy (EDS), and Scanning Electron Microscopy (SEM) were employed for the characterization of MIGAC particle electrodes at pH=7, 30V applied voltage, 10g of particle electrodes, 175mL/min flow rate, and a supporting electrolyte (0.063M NaCl + 0.025M Na2SO4). The findings indicate that the effectiveness of Chemical Oxygen Demand (COD) elimination increased quickly after 20min to 66.93, 69.88, 77.59, 74.14, 81.26, 79.87, and 87.14% for Conventional Electrocoagulation (CEC). Three-dimensional electrocoagulation with granular activated carbon (TEC-RGAC), TEC-MIGAC (Al), TEC-MIGAC (Fe), and TEC-MIGAC (Al:Fe) with molar ratios of (1:1), (1:2), and (2:1) respectively were utilized. While turbidity removals were 99.04, 98.87, 99.23, 94.89, 92.42, 98.85, and 99.21% for CEC ,TEC-RGAC, TEC-MIGAC(Al), TEC-MIGAC(Fe), TEC-MIGAC(1:1), TEC-MIGAC(1:2), and TEC-MIGAC(2:1) respectively. The results demonstrated that the metal impregnation of GAC is an interesting method for achieving effective turbidity and COD removal from refinery wastewater. In both batch and repeat recycling tests, MIGAC with a mixture of aluminum and iron oxides removed turbidity and COD more effectively and efficiently than RGAC.

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Engineering TiO2 supported CTAB modified bentonite for treatment of refinery wastewater through simultaneous photocatalytic oxidation and adsorption

Cited by 30 publications

References 56 publications

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Construction of a novel double network polymer composite and evaluation of its highly efficient adsorption properties for copper ions

Refinery Wastewater Treatment by a Novel Three-Dimensional Electrocoagulation System Design

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