Online ISSN: 2515-8260

Keywords : Selectivity


ADSORPTION HEAVY METALS THROUGH THE USE OF A NATURAL BIOPOLYMER, (COCOA SHELL). FRON CONTAMINATED WATERS

Walther B. Aparicio Aragón; Tania Deza Ramos

European Journal of Molecular & Clinical Medicine, 2021, Volume 8, Issue 1, Pages 1366-1373

The heavy metals found in contaminated waters are dangerous for the environment and human health, so it is necessary to seek and apply techniques to remove these pollutants, using adsorption techniques with natural biopolymers such as cocoa shells,characterizing the adsorption by infrared spectroscopy, obtaining values of (k) Freundlich's constant whose highest value is for the lead cation and the lowest for the more hydrated cation such as copper, presenting an opposite behavior for the exponent "n" of Freundlich's equation. The use of the cocoa shell as an adsorbent is an alternative to remove these contaminants from the water

DEVELOPMENT OF SELECTIVE SENSORS FOR DETERMINATION OF ETHYL ALCOHOL VAPORS

Ergashboy Abdurakhmanov; Zulfiya Begmuradovna Murodova; Farrukh Fakhriddinovich Kholmurzaev; Bakhtiyor Bakhodir ugli Akhmedov

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 9, Pages 2769-2779

The paper establishes the regularities of the oxidation of combustible substances in the presence of catalytic systems of different nature and on their basis the catalysts for measuring and compensation sensitive elements of a thermocatalytic ethanol vapor sensor are selected. The possibility of creating highly sensitive and selective sensors with the use of measuring and compensating thermosensitive elements of the sensor containing catalysts of different activity to the components of complex gas-air mixtures has been experimentally confirmed.The main metrological characteristics and operational parameters of the developed selective thermocatalytic ethanol sensors are estimated. The developed utensils allow the determination of ethyl alcohol vapors in wide ranges of its concentrations and have the best metrological characteristics and operational parameters.