Chromium removal from tannery wastewater through activated carbon produced from Parthenium hysterophorus weed

Bedada, Dinaol; Angassa, Kenatu; Tiruneh, Amare; Kloos, Helmut; Fito, Jemal

doi:10.1007/s40974-020-00160-8

Cited by 56 publications

(58 citation statements)

References 55 publications

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“…Sorption of Cr(VI) ions depends on pH of the solution; the best Cr(VI) uptake was reported at pH 2.0 with a maximum adsorption capacity of 403.2 mg/g, and the removal mechanism was predominantly chemisorption. The same observations were reported by Bedada et al [207] using activated carbon produced from Parthenium hysterophorus weed chemically activated by phosphoric acid. This is to highlight that mostly metal ions (Pb 2+ , Cd 2+ , Cr 3+ , Fe 2+ , Cu 2+ , Ni 2+ , Co 2+ , Hg 2+ , etc.)…”

Section: Timesupporting

confidence: 85%

Current State of Porous Carbon for Wastewater Treatment

et al. 2020

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Porous materials constitute an attractive research field due to their high specific surfaces; high chemical stabilities; abundant pores; special electrical, optical, thermal, and mechanical properties; and their often higher reactivities. These materials are currently generating a great deal of enthusiasm, and they have been used in large and diverse applications, such as those relating to sensors and biosensors, catalysis and biocatalysis, separation and purification techniques, acoustic and electrical insulation, transport gas or charged species, drug delivery, and electrochemistry. Porous carbons are an important class of porous materials that have grown rapidly in recent years. They have the advantages of a tunable pore structure, good physical and chemical stability, a variable specific surface, and the possibility of easy functionalization. This gives them new properties and allows them to improve their performance for a given application. This review paper intends to understand how porous carbons involve the removal of pollutants from water, e.g., heavy metal ions, dyes, and organic or inorganic molecules. First, a general overview description of the different precursors and the manufacturing methods of porous carbons is illustrated. The second part is devoted to reporting some applications such using porous carbon materials as an adsorbent. It appears that the use of porous materials at different scales for these applications is very promising for wastewater treatment industries.

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Section: Timesupporting

confidence: 85%

Current State of Porous Carbon for Wastewater Treatment

et al. 2020

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“…Finally, the band in the range of 780–790 cm −1 , which appeared only after the adsorption of Cr(VI), can be attributed to the formation of Cr–O bond [ 43 , 57 ]. It can be concluded that this comparative FTIR spectrum presented in Figure 2 , clearly indicates the loading of Cr(VI) to the adsorbent [ 58 ].…”

Section: Resultsmentioning

confidence: 98%

Chromium(VI) Removal from Water by Lanthanum Hybrid Modified Activated Carbon Produced from Coconut Shells

et al. 2022

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Cr(VI) is considered to be the most hazardous and toxic oxidation state of chromium and hence the development of effective removal technologies, able to provide water with Cr(VI) below the drinking water limits (US EPA 100 μg/L, European Commission 50 μg/L, which will be reduced to 25 by 2036) is a very important issue in water treatment. This study aimed at examining the performance of activated carbon produced from coconut shells, modified by lanthanum chloride, for Cr(VI) removal from waters. The structure of the formed material (COC-AC-La) was characterized by the application of BET, FTIR and SEM techniques. The effect of the adsorbent’s dosage, pH value, contact time, initial Cr(VI) concentration and water matrix was examined with respect to Cr(VI) removal. The results indicated that the maximum Cr(VI) removal was observed at pH 5; 4 h contact time and 0.2 g/L of adsorbent’s dosage was adequate to reduce Cr(VI) from 100 μg/L to below 25 μg/L. Freundlich isotherm and pseudo-second order kinetic models fitted the experimental data sufficiently. The maximum adsorption capacity achieved was 6.3 μg/g at pH 5. At this pH value, the removal percentage of Cr(VI) reached 95% for an initial Cr(VI) concertation of 30 μg/L. At pH 7 the corresponding efficiency was roughly 60%, resulting in residual Cr(VI) concentrations below the anticipated drinking water limit of 25 μg/L of total chromium, when the initial Cr(VI) concentration was 50 μg/L. Consecutive adsorption and regeneration studies were conducted using 0.01 M of NaOH as an eluent to evaluate the reusability of the adsorbents, Results showed 20% decrease of adsorption capacity after 5 regeneration cycles of operation.

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“…SEM (Model FEI Inspect F50) was used to determine the surface morphology of the pretreated sample, before activation and after adsorption. Standard procedures were followed in preparing the sample and operating the equipment [51,52]. Advances in Materials Science and Engineering 3 XRD (Model Olympus BTXH) was used at a diffraction angle of 2ø from 10 to 80 °to determine the crystalline and amorphous nature of the sample after activation and after adsorption.…”

Section: Characterization Of the Activated Carbonmentioning

confidence: 99%

Synthesis Optimization of Activated Carbon Driven from Scrap Tire for Adsorbent Yield and Methylene Blue Removal under Response Surface Methodology

Kassahun

Tibebu

Tadesse³

et al. 2022

Advances in Materials Science and Engineering

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This study aimed to investigate the synthesis optimization of activated carbon-driven scrap tires for adsorbent yield and methylene blue removal under response surface methodology. The scrap tire sample was activated by KOH using ethanol as a solvent. The optimized activated carbon was characterized using proximate analysis, scanning electron microscope (SEM), X-ray diffraction (XRD), and Brunauer Emmett Teller (BET) method. The activated carbon was demineralized using 5 M NaOH + 98% H2SO4 (1 : 1) as a solvent to enhance the surface area. Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models were used to check the adsorption isotherm. The adsorption kinetics was checked using pseudo-first-order and pseudo-second-order models. Weber-Morris intraparticle diffusion model was used to study the diffusion mechanism. The optimum impregnation ratio, impregnation time, and carbonization temperature for synthesizing the activated carbon were 2 g/g, 12 hr, and 700°C, respectively. The moisture content, volatile matter, ash content, fixed carbon, and bulk density of the activated carbon were 6.13%, 9.42%, 5.34%, 79.11%, and 0.89 mg/L, respectively. The surface area of optimized activated carbon was enhanced by demineralization process and increased from 53 m2/g to 260.26 m2/g. Temkin adsorption isotherm with R2 values of 0.982 and pseudo-second-order adsorption kinetics with R2 values of 0.999 best fits the experimental data respectively. Intraparticle diffusion was not the only rate-controlling step for both optimized and demineralized (NaOH + H2SO4) activated carbon. It can be concluded that the optimized and demineralized activated carbon derived from scrap tires has a promising potential to be used as a low-cost adsorbent in developing countries including Ethiopia. However, further investigation needs to be conducted before scaling up at industrial level.

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Chromium removal from tannery wastewater through activated carbon produced from Parthenium hysterophorus weed

Cited by 56 publications

References 55 publications

Current State of Porous Carbon for Wastewater Treatment

Current State of Porous Carbon for Wastewater Treatment

Chromium(VI) Removal from Water by Lanthanum Hybrid Modified Activated Carbon Produced from Coconut Shells

Synthesis Optimization of Activated Carbon Driven from Scrap Tire for Adsorbent Yield and Methylene Blue Removal under Response Surface Methodology

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