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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.)

Adsorption of organic compounds on mesoporous material from rice husk ash (RHA)

Full text
Author(s):
Costa, Jose Arnaldo S. [1, 2] ; Sarmento, Victor H. V. [3] ; Romao, Luciane P. C. [4] ; Paranhos, Caio M. [2]
Total Authors: 4
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
[3] Univ Fed Sergipe, Dept Chem, BR-49100000 Itabaiana, Sergipe - Brazil
[4] Fed Univ Sergip, Dept Chem, BR-49100000 Sao Cristovao, Sergipe - Brazil
Total Affiliations: 4
Document type: Journal article
Source: BIOMASS CONVERSION AND BIOREFINERY; v. 10, n. 4, p. 1105-1120, DEC 2020.
Web of Science Citations: 6
Abstract

The MCM-41 (TEOS) and MCM-41 (RHA) were synthesized from tetraethyl orthosilicate (TEOS) and rice husk ash (RHA), respectively. The mesoporous materials were used for the removal of the naphthalene (Nap), benzo{[}b]fluoranthene (B{[}b]F), benzo{[}k]fluoranthene (B{[}k]F), and benzo{[}a]pyrene (B{[}a]P) organic compounds from aqueous media. Polycyclic aromatic hydrocarbons (PAHs) are released into the aquatic environments via petroleum spill, industrial discharge, the combustion of fossil fuels, automobile exhaust, and nonpoint sources, such as atmospheric deposition and urban runoff. These compounds can be a threat to environment and humans, since they are recalcitrant, toxic, carcinogenic, and/or mutagenic pollutants. The mesoporous silicas were characterized by FTIR, TGA, SAXS, SEM, and N-2 adsorption/desorption analyses. Removal processes were conducted to evaluate the initial PAHs concentrations and individual adsorption in comparison with the mixture of same, as well as adsorbent amount, solution pH, contact time, and temperature. The nanostructured materials exhibited the textural and structural properties typical of mesoporous materials. The q(e) values found in the kinetic equilibrium for the PAHs mixture followed the same increasing order for the two mesoporous materials: Nap < B{[}a]P < B{[}k]F < B{[}b]F, with removal percentages of 67.71, 94.30, 95.30, and 98.04% for MCM-41 (TEOS) and 79.94, 94.34, 95.32, and 98.25% for MCM-41 (RHA), respectively. (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