University of Oulu

Cruz, J.F.; Cruz, G.J.F.; Ainassaari, K.; Gómez, M.M.; Solís, J.L.; Keiski, R.L. Microporous activation carbon made of sawdust from two forestry species for adsorption of methylene blue and heavy metals in aqueous system : case of real polluted water Revista Mexicana de Ingeniería Química Vol. 17, No. 3 (2018) 847-861. https://doi.org/10.24275/uam/izt/dcbi/revmexingquim/2018v17n3/Cruz

Microporous activation carbon made of sawdust from two forestry species for adsorption of methylene blue and heavy metals in aqueous system : case of real polluted water

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Author: Cruz, J.F.1; Cruz, G.J.F.1; Ainassaari, K.2;
Organizations: 1Universidad Nacional de Piura, Departamento de Química, Campus Universitario s / n Miraflores, Piura, Perú
2University of Oulu, Faculty of Technology, Environmental and Chemical Engineering, P.O.Box 4300, FI-90014 University of Oulu, Finland
3Universidad Nacional de Ingeniería, Facultad de Ciencias, Av. Túpac Amaru 210, Lima 25, Perú
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2018100137027
Language: English
Published: Universidad Autonoma Metropolitana, 2018
Publish Date: 2018-10-01
Description:

Abstract

Activated carbon samples were prepared and characterized from two novel forestry precursors by one-step chemical activation with ZnCl₂. The adsorption capacities of the adsorbents were tested with methylene blue in monocomponent synthetic solution and with heavy metals from polluted river water. The specific surface areas (S BET ) of the produced activated carbons were 1278 and 1404 m²/g. Further characterization was carried out by FTIR, RAMAN spectroscopy, XRD and FESEM analysis. The pore structure of both activated carbons was predominantly microporous with presence of mesopores. The maximum methylene blue (MB) adsorption capacities for both activated carbons were 250 mg/g and 357 mg/g. MB kinetic experiments were carried out and the influence of the initial MB concentration and the activated carbon dosage was evaluated. The samples reached removal levels close to 100% during the first 5 min of experiments with dissolved As(V) and Pb(II) in the polluted river water, reducing the concentration of these elements until levels below the local water quality standards.

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Resumen

Se prepararon carbones activados a partir de dos precursores de la actividad forestal utilizando activación química en un solo paso con ZnCl₂. Las capacidades de adsorción se determinaron con azul de metileno en soluciones sintéticas y con metales pesados de agua de un río contaminado. Las áreas superficiales específicas de los carbones activados se calcularon entre 1278 y 1404 m²/g. Una caracterización de los materiales se realizó mediante FTIR, espectroscopía RAMAN, difracción de rayos X y microscopía electrónica de barrido. La estructura porosa de ambos carbones activados fue predominantemente microporosa con presencia de mesoporos. La máxima adsorción de azul de metileno por ambos carbones fue de entre 250 mg/g y 357 mg/g. La cinética de adsorción de azul de metileno con diferentes concentraciones iniciales del colorante y diferentes dosis de carbón activado, también fue evaluada. Las muestras alcanzaron una capacidad de remoción de As(V) y Pb(II) disueltos en agua de un río contaminado cercanas 100 % durante los primeros 5 min, reduciendo los valores de estos contaminantes a niveles por debajo de los estándares de calidad de agua locales.

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Series: Revista mexicana de ingenieria quimica
ISSN: 1665-2738
ISSN-E: 2395-8472
ISSN-L: 1665-2738
Volume: 17
Issue: 3
Pages: 847 - 861
DOI: 10.24275/uam/izt/dcbi/revmexingquim/2018v17n3/Cruz
OADOI: https://oadoi.org/10.24275/uam/izt/dcbi/revmexingquim/2018v17n3/Cruz
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
218 Environmental engineering
Subjects:
Funding: The Academy of Finland is acknowledged for research funding to the AdMatU project (DNo: 269631) from the Development funds. The National University of Piura, the National University of Tumbes provided important financial support (Proyecto Canon - Resolución N° 0252-2016/UNT-R) and the Peruvian National Council for Science and Technology (CONCYTEC) (Contract N° 024-2016-FONDECYT) are gratefully recognized for their support.
Copyright information: © 2018 The Authors and Academia Mexicana de Investigación y Docencia en Ingeniería Química A.C. Published in this repository with the kind permission of the publisher.