Biosortion of Cr(VI) from Aqueous Solutions Using Chemically Modified Okra Powder

Autor:	null Joelington do C. Conceição, null Antônio Santos Silva, null Antônio Wilson M. de C. Costa, null Edilson de Jesus, null Victor Hugo S. Ramos
Rok vydání:	2021
Předmět:	Absorbance Langmuir chemistry.chemical_compound Adsorption Aqueous solution Chromatography Chemistry Freundlich equation Fourier transform infrared spectroscopy Citric acid Stock solution Nuclear chemistry
Zdroj:	Journal of Basic & Applied Sciences. 10:73-79
ISSN:	1927-5129 1814-8085
DOI:	10.6000/1927-5129.2014.10.11
Popis:	The main objective of this work was to use the okra powder modified with citric acid as biosorbent for the removal of Cr(VI) from aqueous solutions. Samples of Cr(VI) solution were prepared by diluting the 100 ppm solution diluted from the 1000 ppm stock solution prepared with K2Cr2O7. The determination of Cr(VI) was performed spectrophotometrically by the method of complexation with 1,5-diphenylcarbazide, measuring the absorbance at a 540 nm wavelength. The experiments were conducted at 25 ± 1 °C; 2, 5, 7 and 8 initial pH; 10-240 minutes contact time and 0.05 g of adsorbent. The Freundlich and Langmuir models were used to fit the experimental data. The Freundlich model provided R2=0.9599, indicating adsorption on heterogeneous conditions. Analysis of fluorescence of X-rays, SEM and FTIR were used to prove the okra powder efficiency in the removal of Cr(VI) from aqueous solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::830f51a616d2fa1eeca4549aefd9fc5b https://doi.org/10.6000/1927-5129.2014.10.11 Zobrazit plný text záznamu