Carbon microspheres derived from walnut shell: Rapid and remarkable uptake of heavy metal ions, molecular computational study and surface modeling

Zbair, Mohamed; Ahsaine, Hassan Ait; Anfar, Zakaria; Slassi, Amine

doi:10.1016/j.chemosphere.2019.05.120

Cited by 45 publications

(11 citation statements)

References 41 publications

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“…Studies have demonstrated that biochars derived from a variety of sources such as paper mill waste, corn, willow, hazelnut, pine, oak, and manure have potential to remove a number of contaminants in wastewaters such as dyes, pharmaceuticals, anions, pesticides and heavy metals [7]. Table 1 reports studies that used biochar originating from a variety of sources to remove metals [12,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. From the Table 1, according to Chen et al [17], hardwood and corn stalk biochar showed 95% of copper and 90% of zinc removals.…”

Section: Introductionmentioning

confidence: 99%

The effect of pyrolysis temperature and feedstock on date palm waste derived biochar to remove single and multi-metals in aqueous solutions

Sızırıcı

Fseha

Yildiz

et al. 2021

Sustain Environ Res

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In this study, leaf and frond date palm waste as feedstock was used to derive biochars. The effects of pyrolysis temperatures on their physical and chemical properties, and their capacity to remove copper, iron, nickel and zinc from single and multi-metal solutions at various pH values were investigated. Analytical and spectroscopic techniques such as scanning electron microscopy, energy dispersive X-ray, Fourier transform infrared spectroscopy, X-ray diffraction, carbon, hydrogen, nitrogen, sulfur elemental analysis, Brunauer Emmett Teller analysis were conducted for characterization. The pore volume, surface area, pH, and total carbon content of date palm leaf and frond biochar increased while functional groups and hydrogen, nitrogen and oxygen content of biochar decreased with increasing pyrolysis temperature compared to feedstock. The removal efficiencies and sorption capacity for single and mixed metal ions were found between 98 and close to 100% and 2.4 and 3.0 mg g− 1 by leaf and frond biochar samples at pH > 6, respectively. Biochar obtained from different feedstock at different pyrolysis temperature did not show any statistically significant improvements on the removal of single or mixed metals from aqueous solutions. The date palm leaf or frond biochar obtained at low pyrolysis temperature is as effective to remove metals as the ones obtained at high pyrolysis temperatures. Therefore, to consume less energy to produce biochar at lower temperature which exhibits same effective removal efficiency will be a win-win solution in terms of sustainability and economy. As a result, date palm waste biochar can be effectively used to remove metals in water and wastewater.

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Section: Introductionmentioning

confidence: 99%

The effect of pyrolysis temperature and feedstock on date palm waste derived biochar to remove single and multi-metals in aqueous solutions

Sızırıcı

Fseha

Yildiz

et al. 2021

Sustain Environ Res

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“…The Δ H value was less than 25 kJ·mol –1 indicates that MB adsorption onto TDAW@alginate involves mainly van der Waals type forces and confirms the physisorption nature of the adsorption. 74,75 Δ S > 0 indicates an increase in the disorder degree of the adsorbed layer at the solid/solution interface.…”

Section: Resultsmentioning

confidence: 99%

Combined Methane Energy Recovery and Toxic Dye Removal by Porous Carbon Derived from Anaerobically Modified Digestate

et al. 2019

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Valorization of agri-food organic waste in order to reach zero waste using cleaner methods is still a challenge. Therefore, both anaerobic co-digestion (ACD) (biological process) and adsorption (physicochemical process) were used in combination for this objective. ACD allows the activation of biodegradable organic matter by microbial action and produces a digestate (co-product). This coproduct was used as a raw material to produce porous carbon having a high specific surface area after chemical treatment using sulfuric acid and thermal activations at temperature T = 350 °C. The resulted material was used for the preparation of core–shell particles with a core made of porous carbon and a shell consisting mainly of alginate and a calcium ion layer. The final core–shell particles were then used for dye treating wastewater and solving the solid–liquid separation problem in the adsorption process. We show here that in the ACD process, significant bio-methane potential (BMP) was produced. Furthermore, the data indicate that 153 L CH 4 kg·SV –1 of BMP was produced under optimum conditions of pH = 8 and inoculum/load ratio = 1.2. The overall results concerning the methylene blue (MB) adsorption from water onto the core–shell particles show the occurrence of a maximum adsorbed amount equal to 26.178 mg g –1 , and good agreement was found between the experimental adsorption data with pseudo-second-order and Langmuir theoretical models. The response surface methodology coupled with the central composite design has allowed the identification of optimal conditions for MB removal and has led to the elucidation of adsorption mechanism and the regeneration of the adsorbent without the occurrence of the solid/liquid separation problem.

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“…In all experiments, the adsorption efficiency of AC was calculated from Eq. (10):Herein, C 0 and C e (mg•L −1 ) are the concentrations at the start of reaction and concentration at the steady-state Hg(II) concentrations in solution, respectively (Zbair et al 2019;Awual, 2017).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Preparation and characterization of powdered and granular activated carbon from Palmae biomass for mercury removal

et al. 2021

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Two forms of activated carbon (i.e., granular and powdered forms) used to test mercury removal in solution. These activated carbons were obtained from the shells of a palmae biomass and used in mercury ion removal in aquatic systems. The African palmae shell taken out from a broadly and simply full-fledged palm tree. This biomass serves as a precursor in the formulation of activated carbons not documented. The powdered and granular fractions of activated carbons described for chemical composition, isoelectric point, and surface area. The mechanism of reactions and the kinetics involved were studied using the results of protonation and rate limitations. The parameters used in the batch mode study included pH, contact time, initial concentration of the adsorbate and the dose of the activated carbons. A comparison of performances, contact time demonstrated the highest adsorption efficiency of 93% for the powdered activated carbon and 92% for the granular activated carbon. The dosage recorded the lowest adsorption efficiency of 84% using granular activated carbon. Comparatively, this study brought to the fore that activated carbon derived from the Plamae biomass remains a novel bio-sorbent

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Carbon microspheres derived from walnut shell: Rapid and remarkable uptake of heavy metal ions, molecular computational study and surface modeling

Cited by 45 publications

References 41 publications

The effect of pyrolysis temperature and feedstock on date palm waste derived biochar to remove single and multi-metals in aqueous solutions

The effect of pyrolysis temperature and feedstock on date palm waste derived biochar to remove single and multi-metals in aqueous solutions

Combined Methane Energy Recovery and Toxic Dye Removal by Porous Carbon Derived from Anaerobically Modified Digestate

Preparation and characterization of powdered and granular activated carbon from Palmae biomass for mercury removal

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