Activated Carbons from Vegetal Raw Materials to Solve Environmental Problems

Мухин, В. М.; Lupaşcu, Tudor; Voropaeva, N. L.; Spiridonov, Yuriy; Bogdanovich, N. G.; Gur’janov, Vasiliy

doi:10.19261/cjm.2014.09(1).03

Cited by 6 publications

(4 citation statements)

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“…[19,20]. The morphological structure of these sources of raw matter favors the obtaining of specimens of activated carbon with high performance values [21] regarding adsorption capacity and increased mechanical resistance [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Capacity of Vitamin B12 and Creatinine on Highly-Mesoporous Activated Carbons Obtained from Lignocellulosic Raw Materials

et al. 2020

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Enterosorbents are widely-used materials for human body detoxification, which function by immobilizing and eliminating endogenous and exogenous toxins. Here, activated carbons, obtained from the lignocellulosic raw vegetal materials of indigenous provenance, have been studied. Walnut shell and wood from local species of nuts and apple-trees were carbonized, and further activated at high temperatures with water vapors in a rotary kiln. A second activation was carried out, in a fluidized bed reactor, but for shorter times. The textural properties of the samples were determined from the adsorption isotherms of nitrogen at 77 K, allowing the obtaining of highly mesoporous materials, while the adsorption capacity permitted an essential rise of six to seven times in the maximal adsorption values of the metabolites, which was determined by the reactivation process. A kinetic study of vitamin B12 and creatinine immobilization was performed, the optimal immobilization time for the apple-tree wood reactivated carbons being 2 times longer than for those originating from walnut shells. An additional investigation was also performed in specific conditions that simulate the real environment of immobilization: the temperature of a febrile human body (at the temperature T = 38 °C) and the characteristic acidity of the urinary tract and stomach (at the pH of 5.68 and 2.53, respectively). The activated carbonic adsorbents studied here, together with the results of the immobilization studies, show that these procedures can conduct a good incorporation of some endogenous metabolic products, such as vitamin B12 and creatinine, therefore presenting a good opportunity for their use as forthcoming commercial enterosorbents.

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Section: Introductionmentioning

confidence: 99%

Adsorption Capacity of Vitamin B12 and Creatinine on Highly-Mesoporous Activated Carbons Obtained from Lignocellulosic Raw Materials

et al. 2020

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“…dqt/dt= K 1 (qe-qt) … (5). specific surface area exceeds 400 m 2 /g (Mukhin et al, 2014) but it is large compared to that found when the bones were calcined at 800 °C for 2 hours (72 m 2 /g) (Ghrab et al, 2017). While the surface of this adsorbent has a pore size is greater than 50nm which explains why the pores are large (macroporous), this is the expected result when using carbonization with chemical activation (Duca et al, 2018).…”

Section: Pseudo First-order Modelmentioning

confidence: 81%

Adsorption of Pb (Ii) in Aqueous Solution on Activated Carbon Prepared From Animal Bones

NAIMA¹

2022

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The objective of this study is the removal of lead (II) from water by adsorption on activated carbon, prepared from animal bones. The adsorption efficiency was evaluated for the carbonized raw material at 400 Â°C and after chemical activation. The adsorption results were about 91.28%, 90.78%, 89.26% at temperatures of 27 Â°C, 35 Â°C, 45Â°C respectively. It was determined that the adsorption system obeyed the pseudo-second order kinetic model by considering the value of the correlationcoefficient (R2 > 0.99) with an adsorption constant of 1.45 minute -1 at an ambient temperature of 27Â°C. The Langmuir isotherm gave a better fit considering the correlation coefficient values (R2 > 0.99). The results indicate that charcoal from carbonized animal bones could be used as an alternative and inexpensive adsorbent for the removal of lead ions from aqueous solutions, when the appropriate conditions are met.

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“…Active carbons obtained by recycling annually renewable plant wastes (the straw of various oilseed brassica crops), represent a black powder [6][7][8][9][10][11]. Powdered activated carbons derived from rape, winter cress, mustard and radish straw according to the developed method (Tables 2, 3) (the product yield level is from 5,7% to 17,9%) have the following characteristics: А с -16,5% wt.…”

Section: Methodsmentioning

confidence: 99%

Innovative Application Technology for Challenging Inducers of Disease Resistance in Spring Rape in (Nano) Chips

Karpachev

Воропаева

Ткачев

et al. 2014

ILCPA

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The present level of development of agricultural science has led to the emergence of a new method of plant protection, it is based on improving the immune potential of plants using elicitors, but not on the destruction of pathogens using pesticides. We have studied the effect of disease resistance inducers based on chitosan, organic acids and other substances with elicitor activity, being part of (nano) chips of different composition (matrix carrier -modified natural minerals, activated carbons, nanotubes, graphene, etc..) for pre-sowing seed treatment and for foliar fertilizing. We have studied their influence on growth, development, the incidence of rape plants, the quantity and quality of their crop. We have also determined the efficiency of (nano) chips depending upon their nature and carrier matrix composition.Keywords: elicitors; (nano) chips; pre-sowing seed treatment; growth; development; the incidence of rape plants; the quantity and quality of their crop

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Activated Carbons from Vegetal Raw Materials to Solve Environmental Problems

Cited by 6 publications

References 0 publications

Adsorption Capacity of Vitamin B12 and Creatinine on Highly-Mesoporous Activated Carbons Obtained from Lignocellulosic Raw Materials

Adsorption Capacity of Vitamin B12 and Creatinine on Highly-Mesoporous Activated Carbons Obtained from Lignocellulosic Raw Materials

Adsorption of Pb (Ii) in Aqueous Solution on Activated Carbon Prepared From Animal Bones

Innovative Application Technology for Challenging Inducers of Disease Resistance in Spring Rape in (Nano) Chips

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