Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Kebede, Abayneh; Kedir, Kassim; Melak, Fekadu; Asere, Tsegaye Girma

doi:10.1155/2022/7554133

Cited by 19 publications

(8 citation statements)

References 45 publications

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“…These results confirmed that the pseudo-second-order kinetic model was applicable and implied that electron sharing or electron transfer between PSD and Cr(VI) might be involved in this process. Similar kinetic fitting results have been reported for Cr(VI) adsorption [ 6 , 19 ].…”

Section: Resultssupporting

confidence: 86%

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Huang

Pan

et al. 2022

BMC Chemistry

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This study was aimed to evaluate the performance of DESs functionalized peanut shell (PSD) as biosorbent for removing Cr(VI) from water. The effects of pretreatment, initial concentration, adsorption temperature, kinetics, adsorption isotherm, and thermodynamics were investigated. Scanning electron microscopy (SEM) and Point of Zero charge (pHpzc) techniques were used for characterization of the adsorbents. The results showed that the rigid structure of peanut shell was broken down after DESs modification and the point of zero charge was 6.02 for peanut shell and 6.84 for PSD, which exhibited a slightly acid character. Based on the comparisons of linear and nonlinear analysis of four kinetic models and four isotherms, the pseudo-second-order kinetic model was found to be suitable for describing the adsorption process. The presence of a boundary effect was observed within the range of research, indicating that internal diffusion was not the only rate-controlling step. The equilibrium data were well represented by the Langmuir model rather than the Freundlich, Temkin, and Dubinin–Radushkevich models. The maximum capacity derived was 5.36 mg g−1. Changes in Gibb’s free energy, enthalpy, and entropy revealed that Cr(VI) adsorption onto modified peanut-shell powders was a spontaneous and endothermic process. However, the highest desorption efficiency was only 8.77% by using NaOH as a desorbing agent. Graphical abstract

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Section: Resultssupporting

confidence: 86%

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Huang

Pan

et al. 2022

BMC Chemistry

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“…Biowaste materials such as avocado (Persea americana) seed (AS), enset (Ensete ventricosum) midrib leaf (EVML), barley (Hordeum vulgare L. (Poaceae) bran (BB), coffee (Coffea arabica L) residue (CR), "Tella" residue (TR), eucalyptus tree ash (ETA), acacia tree charcoal (ATC), pea (Pisum sativum) seed shell (PSS), and Erythrina abyssinica bark (EAB) locally called "Korch" were obtained from various locations of Jimma city, Ethiopia. "Tella" residue (TR) and the pea (Pisum sativum) seed shell (PSS) were treated as in literature [16]. Both AS and CR were obtained from local cafeterias, whereas BB, TR, ETA, ATC, and PSS were collected from local household wastes.…”

Section: Preparation Of Biowaste Materialsmentioning

confidence: 99%

“…Barley, maize, wheat, hops, and other spices are among the commonly used raw materials in the preparation of "Tella." Preparation of "Tella" requires 5-7 days, wherein the final stage, the potable "Tell" is filtered to remove any suspended solid while the settled residue is used to feed cows or discard [16].…”

Section: Preparation Of Biowaste Materialsmentioning

confidence: 99%

Adsorptive Removal of Methylene Blue Dye Using Biowaste Materials: Barley Bran and Enset Midrib Leaf

Mekuria

Diro

Melak

et al. 2022

Journal of Chemistry

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In this study, several biowaste materials are screened for adsorptive removal of methylene blue (MB) from synthetic water. Among the tested adsorbents, barley (Hordeum vulgare) bran (BB) and enset (Ensete ventricosum midrib leaf, EVML) were selected for further evaluation of MB (a model cationic dye) adsorption. Batch MB adsorption performance of BB and EVML adsorbents was significantly high in a wide pH range (4-9). The well fitting of experimental data with pseudosecond-order kinetic model suggests a monolayer adsorption of MB. The MB adsorption onto both adsorbents was fit well with the Langmuir isotherm model with maximum MB adsorption capacities of 63.2 mg/g (BB) and 35.5 mg/g (EVML). The biowaste materials exhibit considerable adsorption capacity for cationic dye (MB), perform well under acidic and basic conditions, and are reusable. Therefore, the use of these materials as adsorbents may have an environmental benefit in terms of the conversion of wastes into valuable materials. Further studies are suggested to investigate the performance of these adsorbents in a continuous mode using real wastewater.

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“…The filtrate was measured by AAS. The amount of chromium ions adsorbed per gram of adsorbent (mg/g) was calculated by the equation (Kebede et al 2022).…”

Section: Implementation Of C-oxw and C-oxds As An Adsorbentmentioning

confidence: 99%

Carbon-Oxalate (C-Ox) Practicum Waste as an Adsorbent Material Candidate in the Chemistry Laboratory

Lasia

2022

molekul

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This study aims to treat carbon and oxalate practicum waste as an adsorbent material candidate in the Chemistry Laboratory. Practicum waste was used to synthesise carbon-oxalate (C-Ox) by using wet (C-OxW) and semi-wet (C-OxDs) impregnation methods. The products were tested by SEM and FTIR. The adsorption was tested by contacting each 1 gram of C-Ox with various concentrations of chromium ions waste for 24 hours while shaking. The filtrate was measured by AAS. The data obtained were compared with standard activated carbon (CC) as control and analyzed with Freundlich and Langmuir isotherm equations. The results showed that C-Ox can be used as an adsorbent in the chemistry laboratory. Based on the SEM test, the pores of C-OxW were seen to be most than C-OxDs and CC. Adsorption of chromium ions of C-OxW and C-OxDs were more effective than CC. C-Ox test by FTIR showed very sharp wavenumbers appeared at 3674.5 and 3705.41 cm-1 for the hydroxyl groups; 1697.4 cm-1 for C=O; and 1141.8 cm-1 for C-O. The determination coefficient (R2) of Freundlich isotherm of CC and C-Ox were higher than Langmuir isotherm, and on the other hand, R2 of C-OxDs was shown oppositely.

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Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Cited by 19 publications

References 45 publications

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Adsorptive Removal of Methylene Blue Dye Using Biowaste Materials: Barley Bran and Enset Midrib Leaf

Carbon-Oxalate (C-Ox) Practicum Waste as an Adsorbent Material Candidate in the Chemistry Laboratory

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