Synthesis of functionalized mesoporous material from rice husk ash and its application in the removal of the polycyclic aromatic hydrocarbons

Author(s)

Costa, Jose Arnaldo S. ^{[1, 2]} ; Sarmento, Victor H. V. ^[3] ; Romao, Luciane P. C. ^[4] ; Paranhos, Caio M. ^[2]

Affiliation

^[1] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro - Portugal

^[2] Univ Fed Sao Carlos, Polymer Lab, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sergipe, Dept Chem, BR-49100000 Itabaiana, Sergipe - Brazil

^[4] Univ Fed Sergipe, Dept Chem, BR-49100000 Sao Cristovao, Sergipe - Brazil

• Document type: Journal article
• Source: Environmental Science and Pollution Research; v. 26, n. 25, p. 25476-25490, SEP 2019.
• Web of Science Citations: 2

Abstract

The rice husk ash (RHA) was used as an alternative source of silica for the synthesis of the functionalized mesoporous material, which was used in the removal of the PAHs naphthalene (Nap), benzo{[}b]fluoranthene (B{[}b]F), benzo{[}k]fluoranthene (B{[}k]F), and benzo{[}a]pyrene (B{[}a]P) from aqueous media. The PABA-MCM-41 (RHA) was characterized using FTIR, TGA, SAXS, and N-2 adsorption-desorption analyses. Removal experiments were performed to determine the initial concentrations, individual adsorption in comparison with the mixture of the PAHs, PABA-MCM-41 (RHA) amount, pH, time, and temperature, and the results obtained were statistically analyzed. The PABA-MCM-41 (RHA) presented the S-BET, V-T, and D-BJH values of 438 m(2) g(-1), 0.41 cm(3) g(-1), and 3.59 nm, respectively, and good thermal stability. The q(e) values found in the kinetic equilibrium for the PAHs mixture followed increasing order: Nap < B{[}a] P < B{[}k]F < B{[}b]F, with removal percentages of 89.08 +/- 0.00, 93.85 +/- 0.28, 94.54 +/- 0.10, and 97.80 +/- 0.05%, 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