Polymer-cellulosic-clay and polymer-cellulosic-zeolitic biocomposites for the removal of methylene blue in aqueous solut
- PDF / 1,160,521 Bytes
- 5 Pages / 432 x 648 pts Page_size
- 101 Downloads / 179 Views
MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.423
Polymer-cellulosic-clay and polymer-cellulosiczeolitic biocomposites for the removal of methylene blue in aqueous solution Ana Teresa Espinosa-Navarro1, María del Carmen Díaz-Nava1, Yolanda Alvarado-Pérez1, Claudia MuroUrista1, José Juan García Sánchez2 1 Laboratorio de Investigación en Ingeniería Ambiental, División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca, Av. Tecnológico S/N, Col. Agrícola Bellavista, C.P. 52149. Metepec, Estado de México
2
Instituto Tecnológico de Estudios Superiores de Jocotitlán. Carretera Toluca-Atlacomulco km 44.8, Ejido de San Juan y San Agustín, Jocotitlán, Edo. México.
ABSTRACT In the present investigation, biocomposites were synthesized from a polymeric alginate matrix in which the carrot residue and a natural bentonite (ANat / Bio) or an iron-modified clinoptilolite-type zeolite (ZFe / Bio) were supported. Their properties were evaluated adsorbents in contact with aqueous solutions of methylene blue (MB). In the first hour of contact, 46% removal was obtained for the ZFe / Bio biocomposite and 60% for the ANat / Bio biocomposite; reaching 100% removal for the ZFe / Bio biocomposite and 98% for the ANat / Bio biocomposite after 24 hours. The biocomposites were characterized by Scanning Electron Microscopy (SEM) and Fourier Transformed Infrared Spectroscopy (FTIR).
INTRODUCTION Pollution in water bodies has increased and has become a worldwide problem [1]. The presence of dyes in industrial liquid effluents, even in very small concentrations, cause a large adverse impact on the receiving water bodies, since due to their characteristics, they provide a high concentration of BOD 5, COD, color (visible even at low concentrations), dissolved salts, suspended solids, lignin and derivatives of organochlorinated compounds, from the decomposition of some dyes, the latter are potentially toxic to aquatic organisms. These pollutants are present in the effluents of the textile, paper, cosmetic, pharmaceutical, paint, and other industries. The methylene blue
Downloaded from https://www.cambridge.org/core. Cambridge University Main, on 01 Dec 2019 at 20:09:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2019.423
dye is an aromatic heterocyclic chemical compound (phenothiazine) with molecular formula: C16H18N3ClS [2]. It is a cationic dye, commonly used in medicine, in the paper industry and as a dye for cotton and wool fibers [3]. In the development of processes for the treatment of textile effluents in the removal of dyes, biological, chemical and physical processes have been used, such as flocculation, coagulation, oxidizing and electrochemical agents, among others, which have high costs and rare industry once applied [4]. Within the methods of removal of contaminants from water, adsorption is the most important, because it has proven to be very effective and versatile. That is why they have sought adsorbents
Data Loading...
