Study of adsorption parameters of autochthonous carbon enterosorbents
Закрыть
Articolul precedent
Articolul urmator
340 2
Ultima descărcare din IBN:
2023-06-29 09:39
Căutarea după subiecte
similare conform CZU
54:574+661.183.122 (1)
Химия. Кристаллография. Минералогия (2025)
Общая экология. Биоценология. Гидробиология. Биогеография (779)
Продукты основной химической технологии (90)
SM ISO690:2012
TIMBALIUC, Nina, PETUHOV, Oleg, LUPASCU, Tudor. Study of adsorption parameters of autochthonous carbon enterosorbents. In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, p. 169. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Ecological and environmental chemistry
Ediția 7, Vol.1, 2022
Conferința "Ecological and environmental chemistry 2022"
7, Chișinău, Moldova, 3-4 martie 2022

Study of adsorption parameters of autochthonous carbon enterosorbents

CZU: 54:574+661.183.122

Pag. 169-169

Timbaliuc Nina, Petuhov Oleg, Lupascu Tudor
 
Institute of Chemistry
 
Proiecte:
 
Disponibil în IBN: 17 martie 2022


Rezumat

Anthropogenic factors of environmental pollution are increasingly affecting the health of the human body, being the cause of many diseases with a negative impact on quality of life. Focused on the elimination of endo- and exogenous toxic substances from the human body, research in the field of enterosorption is in a continuous process of identification of new enterosorbent products. At the top of the demands are enterosorbents prepared from activated carbons of vegetal origin (fruit kernels, walnut shells, grape seeds etc.), because their morphological structure favors the obtaining of adsorbents with a high mechanical strength and increased adsorption capacity. In the Ecological Chemistry laboratory of the Institute of Chemistry, using different methods and conditions of activation, a set of activated carbons was obtained in order to identify samples with potential of use as enterosorbents. The testing of the adsorption power of the autochthonous carbon adsorbents was performed with the use of Antipyrine, according to the requirements of the European Pharmacopoeia Monograph (EPM) for enterosorbents. The obtained results allowed us to select two samples of activated carbon (AC-MR and AC-C, obtained from apple wood and apricot kernels) which showed an adsorption power greater than 400 mg/g, which corresponds to the requirements of the EPM. The research of the influence of the granulometric composition of the investigated carbon adsorbents on the adsorption capacity compared to Antipyrine shows a considerable increase (about 30 %) of the adsorption power value with the decrease of the carbon particle sizes (from 800-2000 μm to 90-125 μm). The Quinacrine dihydrochloride (C23H30ClN3O· 2HCl) was used as adsorbate for the study of adsorption parameters of autochthonous activated carbon AC-MR. The adsorption kinetic curves were determined for two concentration values (200 mg/l and 500 mg/l) in a time interval between 15-300 minutes. Adsorption isotherms were measured, modeling the parameters of temperature and pH according to the values of the human body. It has been established that the adsorption of Quinacrine dihydrochloride on AC-MR is an endothermic process but the influence of the temperature factor (studied values: 25ºC, 35ºC and 45ºC) on the degree of immobilization is insignificant. The increase of the pH from 2.0 to 7.0 is accompanied by a practically double increase in the rate of Quinacrine dihydrochloride immobilization. The realized study regarding the adsorption parameters of autochthonous activated carbon AC-MR attested the compliance of the adsorption power against Antipyrine with the requirements of the European Pharmacopoeia Monograph and suggests that this sample of carbon adsorbent is of interest for use as an enterosorbent.