High efficiency removal of As(III) from waters using a new and friendly adsorbent based on sugarcane bagasse and corncob husk Fe-coated biochars
| Autor: | Minéia A. de Moraes, Erik S. J. Gontijo, Carolina de Castro Bueno, Adnivia Santos Costa Monteiro, André Henrique Rosa, José Ignácio Z. Montero |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal de Sergipe (UFS), UFZ-Helmholtz Centre for Environmental Research |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Arsenites Health Toxicology and Mutagenesis 02 engineering and technology 010501 environmental sciences Corncob Ferric Compounds Zea mays 01 natural sciences Husk Water Purification Arsenic symbols.namesake Adsorption Desorption Spectroscopy Fourier Transform Infrared medicine Water treatment Cellulose 0105 earth and related environmental sciences Temperature Public Health Environmental and Occupational Health Langmuir adsorption model General Medicine Hydrogen-Ion Concentration Models Theoretical 021001 nanoscience & nanotechnology Pollution Saccharum Modified biochars Chemical engineering Kinetics parameters Charcoal symbols 0210 nano-technology Bagasse Pyrolysis Water Pollutants Chemical Activated carbon medicine.drug |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2018-12-11T16:54:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-10-30 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Water contamination of As is a big issue in many areas around the globe. Therefore, cheap and efficient techniques are essential facing traditional treatment methods. Then, biochars (BC) emerged recently as material that can be used for As removal. However, research about efficiency of BC produced from local feedstock is still needed. The purpose of this study is to assess the efficiency of BC produced from sugarcane bagasse (SB) together with corncob husk (CH) with and without Fe(III) (BCFe) modification to be used for removal of As(III) from waters. The BC and BCFe produced at different pyrolysis temperatures were characterised using FTIR and SEM/EDS. Adsorption capacities of BC and BCFe were evaluated via batch adsorption, desorption and column tests and their performance was compared with adsorption using activated carbon. The results showed that Fe modification improve substantially the As(III) adsorption in a way that both BCFe-SB and BCFe-CH removed from 85% to 99.9% from 1000 µg/L As(III) solutions. Both materials fitted well in Langmuir model and the maximum adsorption capacity was 20 mg/g for BCFe-SB and 50 mg/g for BCFe-CH. The adsorption kinetics of BCFe was fast (≤ 30 min) and it had a better performance than activated carbon. The column tests showed that the process is efficient even at high As(III) concentrations. The fast removal process and good removal results make the BCFe-SB and BCFe-CH attractive for in situ and commercial (filters) use, since time and efficiency are required in new technologies. Sao Paulo State University (UNESP) Institute of Science and Technology, Av. Tres de Marco, 511, Alto da Boa Vista Federal University of Sergipe (UFS) Postgraduate Program in Water Resources, Av. Marechal Rondon, s/n - Jd. Rosa Elze UFZ-Helmholtz Centre for Environmental Research Department Lake Research, Brueckstr 3a Sao Paulo State University (UNESP) Institute of Science and Technology, Av. Tres de Marco, 511, Alto da Boa Vista CNPq: 303189/2013-4 |
| Databáze: | OpenAIRE |
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