Adsorption of algal organic matter on activated carbons from alternative sources: Influence of physico-chemical parameters
| Autor: | Maria Teresa Hoffmann, Luiz Antonio Daniel, Fabio S. de Vicente, Luan de Souza Leite, Danilo Vitorino dos Santos |
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| Přispěvatelé: | Universidade de São Paulo (USP), Universidade Estadual Paulista (UNESP) |
| Rok vydání: | 2021 |
| Předmět: |
Natural organic matter
chemistry.chemical_classification Granular activated carbon Process Chemistry and Technology Langmuir adsorption model Context (language use) Sorption symbols.namesake Adsorption chemistry Ionic strength Competitive adsorption Environmental chemistry symbols Humic acid Organic matter Water treatment Safety Risk Reliability and Quality Waste Management and Disposal Trihalomethanes Biotechnology |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 2214-7144 |
| Popis: | Made available in DSpace on 2022-04-28T19:47:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-12-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The algal organic matter (AOM) is a concern for water treatment due to its low removal by traditional technologies. Granular activated carbon (GAC) is used extensively in drinking water treatment in various roles; however, there is little information about GAC performance for AOM removal. In this context, this study investigated the AOM removal by alternative (bovine bone (BO), babassu coconut (BA), and dende coconut (DE)) and traditional (bituminous (BI)) activated carbons in different testing conditions (pH, ionic strength, and adsorbent dosage). Freundlich model fitted better to predict the isotherm data than the Langmuir model for all GACs (R2 > 0.99). High removals were found for BI (86.3 to 99.5%), BA (82.9 to 95.5%), BO (67.2 to 88.2%), and DE (58.0 to 78.8%). The AOM removal followed the order of BI > BA > BO > DE for all conditions tested. The traditional BI showed the best performance for AOM removal; however, BA was also effective and showed efficiencies close to BI. Trihalomethanes formation potential (THMFP) after the adsorption was assessed and high reductions were obtained for BI (86.3 to 99.5%), BA (82.9 to 94.3%), BO (67.2 to 88.2%), and DE (58.0 to 78.8%). The competition between AOM with dissolved humic acid (HA) for sorption sites was also evaluated. The presence of HA in a lower concentration than AOM can increase the AOM removal significantly for all GACs, making their efficiencies very similar. Our findings will allow a better design to improve the affinity of these GACs for AOM removal in water treatment facilities. Department of Hydraulics and Sanitation São Carlos School of Engineering University of São Paulo, Av. Trabalhador São-Carlense, 400 Department of Physics Institute of Geosciences and Exact Sciences Sao Paulo State University (UNESP) Laboratory of Chemical Residues University of São Paulo Department of Physics Institute of Geosciences and Exact Sciences Sao Paulo State University (UNESP) FAPESP: 2019/05759-1 |
| Databáze: | OpenAIRE |
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