Adsorption of Reactive Red 195 dye from industrial wastewater by dried soybean leaves modified with acetic acid

Mahanna, Hani; Azab, M. S.

doi:10.5004/dwt.2020.24960

Cited by 38 publications

(14 citation statements)

References 41 publications

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“…Thus, the higher proportional dye removal at lower initial concentration can be attributed to increased probability of binding all dye molecules to vacant adsorbent sites. Mahanna & Samy (2020) reported similar results in reactive red 195 dye removal using acid-modified soybean leaves.…”

Section: Effect Of Initial Dye Concentrationmentioning

confidence: 61%

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Adane

Adugna

Alemayehu

2021

Water Practice and Technology

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Adsorption offers efficient, cost-effective, and eco-friendly method for the treatment of dye-laden wastewater. This work presents, reactive red 198 (RR198) removal by adsorption using bentonite clay (BC) blended with sugar cane bagasse ash (SCBA). The adsorbent's surface morphologies, crystalline phase structures, functional groups, and specific surface before and after adsorption were examined using SEM, XRD, FTIR, and BET respectively. Central composite design (CCD) under response surface methodology (RSM) was applied to optimize independent and dependent variable values. The optimal parameters for RR198 removal using the blended adsorbent were 107 minutes contact time, 0.934 g/L adsorbent dose, and 15 mg/L initial dye concentration, and 85.2% RR198 removal efficiency was achieved. The sorption isotherms and kinetics were evaluated using various existing models. The Freundlich isotherm model (R2 = 0.95) and the pseudo-second-order equation best described the adsorption parameters and the RR198 adsorption kinetic mechanism, respectively. Desorption and reusability experiments in batch study confirmed that BC blended with SCBA can be used multiple times for dye removal from wastewater.

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Section: Effect Of Initial Dye Concentrationmentioning

confidence: 61%

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Adane

Adugna

Alemayehu

2021

Water Practice and Technology

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“…Therefore, O 2 − could react with H2O molecules to produce hydroperoxy radical (HO 2 ) and hydroxyl radical (OH), which are strong oxidizing agents, to decompose the organic molecule of MG dye [ 47 , 48 , 49 , 50 ]. O 2 − + H 2 O → HO 2 ∙+ OH …”

Section: Resultsmentioning

confidence: 99%

“…e CB − + h VB + → PC (8) ZnO cannot absorb much of the sunlight directly due to its large bandgap of 3.37 eV, but colored organic MG dye adsorbed on its surface and acts as a photosensitive matrix. Besides, the inclusion of the polymeric matrix with semiconductor polypyrrole (PPy) polymer with the π-orbital, which possesses highest occupied molecular orbital (HOMO) in the combined system, found that the lowest unoccupied molecular orbital (LUMO) levels of the polymer were energetically higher than the conduction band edge of ZnO [47]. Therefore, the suggested electron transfer paths for MG dye degradation are illustrated in Figure 11.…”

Section: Suggested Mechanism Of Malachite Green Dye Degradation Using Zno Polymeric Nanofibersmentioning

confidence: 99%

“…− could react with H2O molecules to produce hydroperoxy radical (HO 2 ) and hydroxyl radical (OH), which are strong oxidizing agents, to decompose the organic molecule of MG dye[47][48][49][50].The organic molecules of MG dyes will be oxidized and converted to CO2 and H 2 O according to the following equation: OH•+ organic molecules (MG dye) + O 2 → products (CO 2 and H 2 O) (7)…”

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confidence: 99%

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Photocatalytic Degradation of Malachite Green Dye from Aqueous Solution Using Environmentally Compatible Ag/ZnO Polymeric Nanofibers

Elkady

Shokry

2021

Polymers

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An efficient, environmentally compatible and highly porous, silver surface-modified photocatalytic zinc oxide/cellulose acetate/ polypyrrole ZnO/CA/Ppy hybrid nanofibers matrix was fabricated using an electrospinning technique. Electrospinning parameters such as solution flow rate, applied voltage and the distance between needles to collector were optimized. The optimum homogenous and uniform ZnO/CA/Ppy polymeric composite nanofiber was fabricated through the dispersion of 0.05% wt ZnO into the dissolved hybrid polymeric solution with an average nanofiber diameter ranged between 125 and 170 nm. The fabricated ZnO-polymeric nanofiber was further surface-immobilized with silver nanoparticles to enhance its photocatalytic activity through the reduction of the nanofiber bandgap. A comparative study between ZnO polymeric nanofiber before and after silver immobilization was investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and thermal gravimetric analysis (TGA). The photocatalytic degradation efficiency of the two different prepared nanofibers before and after nanosilver immobilization for malachite green (MG) dye was compared against various experimental parameters. The optimum degradation efficiency of nanosilver surface-modified ZnO-polymeric nanofibers was recorded as 93.5% for malachite green dye after 1 h compared with 63% for ZnO-polymeric nanofibers.

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“…However, ARE values are rather high for the Freundlich isotherm at temperatures of 10 and 20 °C, and the Langmuir isotherm at temperatures of 30 and 40 °C. Therefore, for describing the experimental data using two-parameter isotherms, the Langmuir model is The q m value calculated by the Langmuir equation increases with the adsorption temperature and is in the range of 257.07-297.27 mg g −1 , suggesting that the CFH-AC has a good adsorption capacity for RR 195 removal and is comparable with TiO 2 nanoparticles (87 mg g −1 ), 36 poly-pyrrole composite (204.08 mg g −1 ), 37 dried soybean leaves modified with acetic acid (12 mg g −1 ), 38 chitosan particles (82.1 mg g −1 ), 39 and AC (1.2 mg g −1 ). 40 For all the three-parameter models investigated, including Radke-Prausnitz, Redlich-Peterson, Sips, and Tóth, the isotherms are illustrated in Figure 14, and the corresponding parameters are summarized in Table 8.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

Thi

Ван

2020

Journal of Chemical Research

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Activated carbons are prepared from coffee husks by chemical activation with ZnCl2 and are characterized by employing Brunauer, Emmett and Teller, scanning electron microscopy, Fourier-transform infrared spectroscopy, and Boehm titrations. The effects of ZnCl2/coffee husks, activation temperature, and activation time are studied, and the results show that the sample ACZ3-600-2 has a high surface area of 1383 m2 g−1, a high pore volume of 1.6482 cm3 g−1, and numerous surface functional groups. The adsorption of reactive red 195 onto the prepared coffee husk activated carbon can be well-described by the pseudo-second-order kinetic model and is found to be controlled by film diffusion followed by intra-particle diffusion. The adsorption isotherm data obtained at 10–40 °C are analyzed and found to follow the Sips model at lower temperatures (10 and 20 °C) and the Redlich–Peterson model at higher temperatures (30 and 40 °C). The obtained thermodynamic parameters (Δ G° < 0, Δ H° = 33.487 kJ mol−1, and Δ S° = 202.30 J K−1 mol−1) suggest that the adsorption of reactive red 195 onto the prepared activated carbon is spontaneous, endothermic, and demonstrates an increasing of randomness at the adsorbate–adsorbent interface. The investigated results show that coffee husk activated carbon is an efficient adsorbent for the removal of reactive red 195 from aqueous solutions.

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Adsorption of Reactive Red 195 dye from industrial wastewater by dried soybean leaves modified with acetic acid

Cited by 38 publications

References 41 publications

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Bentonite blended with bagasse ash as an adsorbent for reactive red 198 dyes

Photocatalytic Degradation of Malachite Green Dye from Aqueous Solution Using Environmentally Compatible Ag/ZnO Polymeric Nanofibers

Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

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