BIOCHAR PECAN NUTSHELL VIA PYROLYSIS FOR USE AS AN ADSORBENT: AN APPLIED STUDY FOR THE REMOVAL OF HEXAVALENT CHROMIUM

Autor:	A. L. Baierle, Maria Amélia Zazycki, Daniele Perondi, Marcelo Godinho, Edson Luiz Foletto, A. B. Ferreira, Gabriela Carvalho Collazzo, Guilherme Luiz Dotto
Rok vydání:	2020
Předmět:	Exothermic reaction Aqueous solution Mechanical Engineering General Chemical Engineering General Chemistry chemistry.chemical_compound Adsorption chemistry Chemisorption Biochar Surface layer Hexavalent chromium Pyrolysis Nuclear chemistry
Zdroj:	Latin American Applied Research - An international journal. 50:203-208
ISSN:	1851-8796 0327-0793
Popis:	The pyrolysis process was used for the production of biochar and carried out a study for removal of Cr (VI) in aqueous solutions. The maximum removal reached was 94 % for a Cr (VI) solution at 50 mg L-1. The Elovich model described very well the adsorption kinetics of Cr (VI) on the biochar and the adsorption equilibrium was described by Sips model. This suggests that adsorption of Cr (VI) onto biochar was controlled by chemisorption and the biochar was covered by the surface layer of the Cr (VI). The thermodynamic parameters showed that this adsorption process was spontaneous, favorable and exothermic. The results of this study show that this adsorbent material prepared by pyrolysis has a good response when applied to the removal of Cr (VI) in aqueous solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3daa60134961d2b716a08eb9994d1723 https://doi.org/10.52292/j.laar.2020.70 Zobrazit plný text záznamu