Estudio de diferentes activantes químicos en la obtención de carbón activado a partir de la cáscara de Hymenaea courbaril L. para la remoción de cadmio (Il)

Translated title of the contribution: Study of different chemical activatings on obtaining activated- Carbon from Hymenaea courbanil L shell for cadmium (II) rentoval

Nelson Poleo, Solaida Oliveros, Marinela Colina, Nancy Rincón, Johan Mesa, Gilberto Colina

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The use of ZnCl2 . H3PO4 H 2S04. HNO3 and HCl for algarrobo frult shell activatlon (Hymenaea courbaril L) permitted lo evaluate and compare tl1e adsorptive capacity of the corresponding carbons pre-pared. The precursor was impregnaled with the chemlcal agents mentioned. separately and it was pyrolized at 500°C in each case. The superficial characteri tics of lhe activated carbons pr par d were det rmined through the Brunnauer-Emmet-Teller (S BET) conv ntional method. obtaining adsorption Iso therms of N 2 at 77K and were compared to those of the Norit-A (CAC) commerclal actlvated carbono The balance determination at liquid phase of the process was carried out by llsing cadmium (II) solutions in load essays at initial concenlrations (Co) of 25. 50 and 100 mg/Lduring 1 h ontact time. The cadrnlum (II) balance concentration was determined by flame atomic adsorption spectrophotometry (EAA). The activatecl carbons with H3P04 and ZnCb presented specific superfi lal area values (SBET) of 1262 and 968 m2/ g. respectively. The Freundlich and Langmuir models were applled to the experimental results. The ls therms showed better adsorplion conditions at solu tions with a cadmium (II) CO of 25 mg/ L for all the carbons preparecl. The correlation coefficient values (R2) and the ad orptlon constant Kr for activaled carbon with H3P04 fit Freundlich's moclel better.

Translated title of the contributionStudy of different chemical activatings on obtaining activated- Carbon from Hymenaea courbanil L shell for cadmium (II) rentoval
Original languageSpanish
Pages (from-to)29-38
Number of pages10
JournalRevista Tecnica de la Facultad de Ingenieria Universidad del Zulia
Volume33
Issue number1
StatePublished - 2010
Externally publishedYes

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