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(es)

Montero, Jose Ignacio Z. ^[1] ; Monteiro, Adnivia S. C. ^{[1, 2]} ; Gontijo, Erik S. J. ^{[3, 1]} ; Bueno, Carolina C. ^[1] ; de Moraes, Mineia A. ^[1] ; Rosa, Andre H. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ Unesp, Inst Sci & Technol, Av Tres Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[2] Fed Univ Sergipe UFS, Postgrad Program Water Resources, Av Marechal Rondon S-N, BR-49100000 Sao Cristovao, SE - Brazil

^[3] UFZ Helmholtz Ctr Environm Res, Dept Lake Res, Brueckstr 3a, D-39114 Magdeburg - Germany

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; v. 162, p. 616-624, OCT 30 2018.
• Citações Web of Science: 5

Resumo

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 mu g/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. (AU)

• Processo FAPESP: 12/17727-8 - Distribuição, complexação e mobilidade de íons arsênio em águas superficiais do Quadrilátero Ferrífero-MG/Brasil: ênfase nas interações com substâncias húmicas aquáticas
• Beneficiário: Erik Sartori Jeunon Gontijo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/08215-4 - Reaproveitamento de resíduos e descontaminação de águas residuais: avaliação do potencial de aplicação de biochar para remoção de contaminantes emergentes e metais potencialmente tóxicos
• Beneficiário: André Henrique Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/24168-8 - Agricultura sustentável: preparação e caracterização de microesferas poliméricas contendo biochar para imobilização e liberação lenta de fósforo e bactérias promotoras de crescimento de plantas
• Beneficiário: André Henrique Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 13/08373-0 - Engenharia de Biochar - Preparação e Caracterização de Microesferas para Liberação Lenta de Nutrientes e Bactérias
• Beneficiário: Carolina de Castro Bueno
• Modalidade de apoio: Bolsas no Brasil - Doutorado