The application of GO-Fe3O4 nanocomposite for chromium adsorption from tannery industry wastewater

Moges, Adelegn; Nkambule, Thabo T.I.; Fito, Jemal

doi:10.1016/j.jenvman.2021.114369

Cited by 68 publications

(59 citation statements)

References 43 publications

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“…Compared to many locally prepared activated carbons, the current activated carbon is superior in terms of the specific surface. For instance, the specific surface area of bentonite is 265 m 2 /g 26 , Parthenium hysterophorus-derived activated carbon is 268 m 2 /g 25 , Fe 3 O 4 -GO is 296 m 2 /g 24 and sugarcane bagasse is 2236.93 m 2 /g 58 . However, the surface area of the recently emerged adsorbent metal–organic framework is extremely high in the range of 1000–10,000 m 2 /g with good properties such as superior performances, tunability structure, thermal stability, and mechanically dispersible 59 – 61 .…”

Section: Resultsmentioning

confidence: 99%

“…The sample was scanned by placing it on the carbon tape and running the machine at an 8-mm working distance. The SEM was operated at 10 A current, 10 kV operational energy, and a 1500 times magnification 24 , 45 .…”

Section: Methodsmentioning

confidence: 99%

“…The FTIR spectrophotometer (FTIR, Thermo Nicolet 5700, and Waltham, MA, USA) was subsequently used to perform the plate analysis. A wavelength range of 4000–400 cm −1 was used for the FTIR analysis 24 , 35 .…”

Section: Methodsmentioning

confidence: 99%

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Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

Fito

Abewaa²,

Mengistu³

et al. 2023

Sci Rep

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Methylene blue (MB) is abundantly found in textile industrial effluent which can cause severe health problems for public and environmental ecology. Therefore, this study aimed to remove MB from textile wastewater using the activated carbon developed from Rumexabyssinicus. The adsorbent was activated using chemical and thermal methods, and then it was characterized by SEM, FTIR, BET, XRD, and pH zero-point charge (pHpzc). The adsorption isotherm and kinetics were also investigated. The experimental design was composed of four factors at three levels (pH (3, 6, and 9), initial MB concentration (100, 150, and 200 mg/L), adsorbent dosage (20, 40, and 60 mg/100 mL), and contact time (20, 40, and 60 min)). The adsorption interaction was evaluated using response surface methodology. The characterization of a Rumexabyssinicus activated carbon was found to have multiple functional groups (FTIR), an amorphous structure (XRD), crack with ups and down morphology (SEM), pHpzc of 5.03 and a high BET-specific surface area of 2522 m2/g. The optimization of MB dye removal was carried out using the Response Surface methodology coupled with the Box Behnken approach. The maximum removal efficiency of 99.9% was recorded at optimum conditions of pH 9, MB concentration of 100 mg/L, the adsorbent dosage of 60 mg/100 mL, and contact time of 60 min. Among the three adsorption isotherm models, the Freundlich isotherm model was the best fit with an experimental value at R2 0.99 showing the adsorption process was heterogeneous and multilayer whereas the kinetics study revealed that pseudo-second-order at R2 0.88. Finally, this adsorption process is quite promising to be used at an industrial level.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

Fito

Abewaa²,

Mengistu³

et al. 2023

Sci Rep

Self Cite

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“…To ensure relatively high sulfite oxidation and Cr removal efficiency simultaneously, the typical pH in this study was determined to be 6.0. Cr(VI) was in a predominantly anionic form of HCrO 4 – and CrO 4 − at a typical pH of 6.0. Therefore, the main redox reaction between Cr(VI) and sulfite is presented in eqs and .…”

Section: Resultsmentioning

confidence: 99%

“…Chromium (Cr) is a hazardous pollutant in wastewater originating from electroplating, leather tanning, pigment, metallurgy, and other chemical industries, whose environmental toxicity differs from its valence states. Hexavalent chromium (Cr(VI)) exhibits extremely high mutagenicity, carcinogenicity, and teratogenicity to the human body, − while trivalent chromium (Cr(III)) is less toxic in water and even has favorable therapeutic capabilities for treating diabetes mellitus. , Typically, the remediation of Cr(VI) wastewater has aroused much attention with various effective methods that have been applied, such as chemical precipitation, − induced reduction, , membrane separation, adsorption, , ion exchange, biological processing, etc. However, a promising and feasible state-of-the-art method for Cr(VI) treatment is the adsorption-coupled reduction, − which aims for both attenuation and ultimately control, with low cost and easy operation features.…”

Section: Introductionmentioning

confidence: 99%

In Situ Reconstruction of Active Catalysis Sites Triggered by Chromium Immobilization for Sulfite Oxidation

Zhang

et al. 2023

Environ. Sci. Technol.

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Hexavalent chromium (Cr(VI)) is a highly toxic substance in wastewater, triggering grievous detriment to aquatic life and human health. Magnesium sulfite is spawned along with the desulfurization process in coal-fired power plants, which is usually disposed of as solid waste. Here, a “waste control by waste” method was proposed upon the redox of Cr(VI)–sulfite, in which highly toxic Cr(VI) is detoxicated and sequent enriched on a novel biochar-induced cobalt-based silica composite (BISC) due to the forced electron transfer from chromium to surface hydroxyl. The immobilized Cr on BISC gave rise to the reconstruction of catalytic active sites “Cr–O–Co”, which further enhance its performance in sulfite oxidation by elevating O2 adsorption. As a result, the sulfite oxidation rate increased by 10 times compared with the non-catalysis benchmark together with the maximum chromium adsorption capacity being 120.3 mg/g. Therefore, this study provides a promising strategy to simultaneously control highly toxic Cr(VI) and sulfite, achieving high-grade sulfur resource recovery for wet magnesia desulfurization.

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Removal of Chromium from Aqueous Solution Using Ziziphus jujuba Seed‐Activated Biochar

Manthira Giri,

Parathasarathy

2024

Chem Eng & Technol

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The present study aims to remove chromium (Cr) from a synthetic solution using Ziziphus jujube seed (ZJS)‐activated biochar (ZJSAB) as an adsorbent. Physicochemical characterization was carried out to understand the properties of ZJSAB samples. Adsorption characteristics of ZJSAB were determined using batch experiments for various temperatures, pH, dosage, concentration, and duration. The study reveals ZJSAB has 93 % efficiency in the removal of Cr for an initial concentration of 60 mg L−1 at 30 °C and 2 pH with 0.6 g L−1 dosage and 120 min duration. Freundlich isotherm and pseudo‐second‐order models were best fit with maximum removal efficiency for ZJSAB. When 0.3 N hydrochloric acid was introduced to a desorption study, Cr desorption was 93.47 %. The study reveals that activated biochar from ZJS was efficient for Cr removal from aqueous solutions.

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The application of GO-Fe3O4 nanocomposite for chromium adsorption from tannery industry wastewater

Cited by 68 publications

References 43 publications

Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

In Situ Reconstruction of Active Catalysis Sites Triggered by Chromium Immobilization for Sulfite Oxidation

Removal of Chromium from Aqueous Solution Using Ziziphus jujuba Seed‐Activated Biochar

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