Mesoporous carbon derived from a biopolymer and a clay: Preparation, characterization and application for an organochlorine pesticide adsorption

Autor(es)

Eufrasio Pinto, Marina de Carvalho ^[1] ; Lima Goncalves, Rosembergue Gabriel ^[1] ; Menezes dos Santos, Rodrigo Morais ^[1] ; Araujo, Emiliane Andrade ^[1] ; Perotti, Gustavo Frigi ^[2] ; Macedo, Rafael dos Santos ^[2] ; Bizeto, Marcos Augusto ^[3] ; Leopoldo Constantino, Vera Regina ^[2] ; Pinto, Frederico Garcia ^[1] ; Tronto, Jairo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Vicosa, Inst Ciencias Exatas & Tecnol, Campus Rio Paranaiba, Rodovia BR 354, Km 310, BR-38810000 Rio Paranaiba, MG - Brazil

^[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Ave Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

^[3] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microporous and Mesoporous Materials; v. 225, p. 342-354, MAY 1 2016.
• Citações Web of Science: 14

Resumo

The production of carbon-based materials is a field of intense scientific research due to the diversity of potential applications that this kind of material presents. In this paper, it is reported the synthesis of porous carbonaceous material (PCM) based on the pyrolysis at 850 degrees C of a composite made of Laponite (commercially available synthetic clay) and Cassava starch, followed by clay removal through acid digestion. The Laponite presence influenced the structural order and textural properties of the pyrolytic carbon formed. After pyrolysis and acid digestion of clay, it was obtained a material with a partial graphitic structure containing majorly sp(2) bounded carbon atoms, that has almost twice the specific surface area and up to 20 times more mesopore volume than the carbonaceous material obtained without the clay. The adsorbent potential of PCM was evaluated by adsorption of Dicamba, an organochlorine pesticide, from aqueous solutions. The PCM exhibits a high Dicamba removal efficiency, with a maximum adsorption capacity of 251.9 mg g(-1) related to a pseudo-second-order kinetic adsorption model with a strong pH dependence. (C) 2016 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 11/50318-1 - Desenvolvimento de compostos com interesse farmacológico ou medicinal e de sistemas para seu transporte, detecção e reconhecimento no meio biológico
• Beneficiário: Ana Maria da Costa Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Temático