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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of rice husk ash in adsorption of Remazol Red dye from aqueous media

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Author(s):
Santana Costa, Jose Arnaldo [1, 2] ; Paranhos, Caio Marcio [2]
Total Authors: 2
Affiliation:
[1] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro - Portugal
[2] Univ Fed Sao Carlos, Dept Chem, Polymer Lab, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SN APPLIED SCIENCES; v. 1, n. 5 MAY 2019.
Web of Science Citations: 3
Abstract

The rice husk ash (RHA) extracted from the rice husk (RH) was measured on the removal of the Remazol Red dye. Adsorption variables such as solution pH, dye concentration, adsorbent amount, contact time, and reuse of the RHA were measured. The adsorption equilibrium was achieving in approximately 30 min, due to the rapid electrostatic attraction between the OH2+ groups of the RHA surface and the sulfonic groups of the dye, which occurred mainly at a pH= 2 value. The removal efficiency of the RHA decreased when the initial dye concentrations were higher, due to pore-filling within of the RHA structure with the migration dye molecules. However, the removal percentage increased with increasing adsorbent amount. The adsorption data were suitable with the Freundlich isotherm and pseudo-second order models. {[}GRAPHICS] . (AU)

FAPESP's process: 18/18894-1 - Synthesis of mesoporous bioactive materials for use in regenerative biomedicine
Grantee:José Arnaldo Santana Costa
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 14/05679-4 - Development of silica-based mesoporous materials from biomass for use as remediation system for polycyclic aromatic hydrocarbon (PAH's)
Grantee:José Arnaldo Santana Costa
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/06775-5 - Development of tunable hybrid polymeric membranes for polycyclic aromatic hydrocarbons (PAHs) remediation from petroleum
Grantee:José Arnaldo Santana Costa
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC