Photocatalytic degradation of textile dyeing wastewater under visible light irradiation using green synthesized mesoporous non-metal-doped TiO2

Helmy, Elsayed T.; Nemr, Ahmed El; Arafa, Esam; El-Dafrawy, Shady; Mouśa, M. A.

doi:10.1007/s12034-020-02322-0

Cited by 18 publications

(11 citation statements)

References 31 publications

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“…The harmful and carcinogenic consequences of these colored effluents’ discharge onto living organisms make them a serious environmental issue [ 7 , 8 ]. Globally, roughly 7 × 10 5 tons of dyes (seven distinct types of dyes) are produced each year, and about 10–15% of the dye used in the process is lost in the discharged effluent [ 9 , 10 ]. Due to the hazardous and carcinogenic nature of these effluents, they should never be released into the environment.…”

Section: Introductionmentioning

confidence: 99%

Microporous Activated Carbon from Pisum sativum Pods Using Various Activation Methods and Tested for Adsorption of Acid Orange 7 Dye from Water

El‐Nemr

Nemr²,

Hassaan³

et al. 2022

Molecules

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This work demonstrates the preparation of high-surface-area activated carbon (AC) from Pisum sativum pods using ZnCl2 and KOH as activating agents. The influence of CO2 and N2 gases during the carbonization process on the porosity of AC were studied. The highest specific surface area of AC was estimated at 1300 to 1500 m2/g, which presented characteristics of microporous materials. SEM micrographs revealed that chemical activation using an impregnation reagent ZnCl2 increases the porosity of the AC, which in turn leads to an increase in the surface area, and the SEM image showed that particle size diameter ranged between 48.88 and 69.95 nm. The performance of prepared AC for adsorption of Acid Orange 7 (AO7) dye was tested. The results showed that the adsorption percentage by AC (2.5 g/L) was equal to 94.76% after just 15 min, and the percentage of removal increased to be ~100% after 60 min. The maximum adsorption capacity was 473.93 mg g−1. A Langmuir model (LM) shows the best-fitted equilibrium isotherm, and the kinetic data fitted better to the pseudo-second-order and Film diffusion models. The removal of AO7 dye using AC from Pisum sativum pods was optimized using a response factor model (RSM), and the results were reported.

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Section: Introductionmentioning

confidence: 99%

Microporous Activated Carbon from Pisum sativum Pods Using Various Activation Methods and Tested for Adsorption of Acid Orange 7 Dye from Water

El‐Nemr

Nemr²,

Hassaan³

et al. 2022

Molecules

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“…There are numerous methods of dye-house effluent treatment like coagulation/flocculation 25 , oxidation with chemical 26 , biological treatment 27 , advanced oxidations [28][29][30][31] , electrochemical treatment 32 , photo-degradation [33][34][35][36] and adsorption treatment 6,8,20,37,38 . One of these methods with the highest preference is the adsorption method for dye removal using activated carbon 39 .…”

mentioning

confidence: 99%

Isotherm and kinetic studies of acid yellow 11 dye adsorption from wastewater using Pisum Sativum peels microporous activated carbon

El‐Nemr

Yılmaz

Ragab

et al. 2023

Sci Rep

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In this study, Pea Peels-Activated Carbon (PPAC), a novel biochar, was created from leftover pea peels (Pisum sativum) by wet impregnation with ZnCl2 and subsequent heating to 600, 700, and 800 °C in a CO2 atmosphere. Investigated how the newly acquired biochar affected the capacity to extract the AY11 dye from the aqueous solution. Through the use of FTIR, XRD, SEM, BJH, BET, DSC, EDX, and TGA studies, the prepared PPAC was identified. It was found that a pH of 2 is optimum for the AY11 dye elimination. The highest removal percentage of AY11 dye was 99.10% using a beginning AY11 dye concentration of 100 mg/L and a 1.0 g/L dose of PPAC. The highest adsorption capacity (Qm) of the PPAC was 515.46 mg/g. Freundlich (FIM), Halsey (HIM), Langmuir (LIM), Tempkin (TIM), and Gineralize (GIM) isotherm models were useful in examining the adsorption results. A variety of error functions, including the average percent errors (APE), root mean square errors (RMS), Marquardt's percent standard deviation (MPSD), hybrid error function (HYBRID), Chi-square error (X2) and a sum of absolute errors (EABS) equations, were also applied to test the isotherm models data. The PPAC experimental data were best suited by the HIM and FIM isotherm models. Elovich (EM), Pseudo-first-order (PFOM), Intraparticle diffusion (IPDM), Pseudo-second-order (PSOM), and Film diffusion (FDM) models were applied to study the kinetic adsorption results. The PSOM had a strong correlation coefficient (R2 > 0.99), and it was principally responsible for controlling the adsorption rate. Anions are typically absorbed during the adsorption mechanism of AY11 dye by PPAC owing to attractive electrostatic forces created with an increase in positively charged areas at acidic pH levels. The regenerated PPAC was used in six successive adsorption/desorption cycles. This study's outcomes show that PPAC successfully removes the AY11 dye from the aqueous solution; as a result, PPAC can be used repeatedly without experiencing considerable loss in effectiveness.

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“…with 50 ml of DW, and the un-adsorbed metal ion in the filtrate was then titrated against 0.01 mol L -1 EDTA using the appropriate buffer solution and indicator as listed in Table 1 [49,69,70]. The pH value more than 7 led to metal precipitation; therefore, no pH values beyond 7 were investigated.…”

Section: Effect Of Phmentioning

confidence: 99%

New magnetic cellulose nanobiocomposites for Cu(II), Cd(II) and Pb(II) ions removal: kinetics, thermodynamics and analytical evaluation

Nemr

El-Assal

El-Sikaily

et al. 2021

Nanotechnol. Environ. Eng.

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Magnetic cellulose nanobiocomposites have been designed and synthesized from sugarcane bagasse to develop new and adequacy adsorbents for heavy metals adsorption from water. In this study, three different ways were followed for three nanocomposites' preparation: (1) coating Fe 3 O 4 through preparation of dissolved cellulose in (7% NaOH and 12% urea) aqueous solution (NFC1), (2) coating Fe 3 O 4 with cellulose through the co-precipitation (NFC2) and (3) crosslinking the cellulose and Fe 3 O 4 with formaldehyde (NFC3). The high-resolution transmission electron microscope (HR-TEM) images confirmed the particle size was ranged from 6 to 25 nm. The three novel nanocomposites' characterization was accomplished by study of surface area, Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA) and X-ray diffraction (XRD). The sorption feature of NFC1, NFC2 and NFC3 toward Cu(II), Cd(II) and Pb(II) ions was explored using the batch equilibrium technique with various experimental controlling parameters. The efficiency of NFC1 appears to be the best for removal of Pb(II) and Cu(II) (3150 and 2150 μmol g −1 ) and NFC2 more adequate nanocomposite for removal of Cd(II) 800 μmol g −1 . The optimum time was proceeded via fast sorption equilibrium at 5-30 min and better fitted with the pseudo-second order kinetic model. Adsorption isotherm obeys Langmuir isotherm that provides better model than the Freundlich isotherm model. According to the thermodynamic parameters, the adsorption was dominated by enthalpic rather than the entropic changes.

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Photocatalytic degradation of textile dyeing wastewater under visible light irradiation using green synthesized mesoporous non-metal-doped TiO2

Cited by 18 publications

References 31 publications

Microporous Activated Carbon from Pisum sativum Pods Using Various Activation Methods and Tested for Adsorption of Acid Orange 7 Dye from Water

Microporous Activated Carbon from Pisum sativum Pods Using Various Activation Methods and Tested for Adsorption of Acid Orange 7 Dye from Water

Isotherm and kinetic studies of acid yellow 11 dye adsorption from wastewater using Pisum Sativum peels microporous activated carbon

New magnetic cellulose nanobiocomposites for Cu(II), Cd(II) and Pb(II) ions removal: kinetics, thermodynamics and analytical evaluation

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