Characterization and evaluation of factors influencing microcystin-LR removal by granular activated carbon produced from different raw materials

Autor: Araujo, Larissa Sene, Coutinho, Aparecido dos Reis, Alvarez-Mendez, Manoel Orlando, Moruzzi, Rodrigo Braga [UNESP], Calijuri, Maria do Carmo, Fernandes Cunha, Davi Gasparini
Přispěvatelé: Universidade de São Paulo (USP), Univ Metodista Piracicaba, Universidade Estadual Paulista (Unesp)
Jazyk: portugalština
Rok vydání: 2018
Předmět:
Zdroj: Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1413-4152
Popis: Made available in DSpace on 2019-10-05T04:50:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-11-01. Added 1 bitstream(s) on 2021-07-15T15:05:02Z : No. of bitstreams: 1 S1413-41522018000601131.pdf: 257055 bytes, checksum: bdc282dc27d0aae1e2552ea64ff9f922 (MD5) Microcystins (MC), which are among the cyanotoxins more commonly found in cyanobacterial blooms, are not efficiently removed by full-cycle water treatment technologies. As an additional barrier, there is the adsorption process with granular activated carbon (GAC). This research compared the efficiency of MC-LR removal by seven GACs produced from different raw materials, analyzing these samples properties: moisture, ash content, pH and textural characteristics. Initially, the results indicated that the GAC properties were influenced by the source material, as well as by the production method. In the adsorption assays, the Langmuir model indicated that in 4h, with 100 mg.L-1 dosage, the granular activated carbon of lignite (CGLIN) had the highest MC-LR (C-o:115.1 mu g.L-1) removal capacity (972%), with q(e,max) of 10.6 mg.g(-1). The volume of mesopores significantly influenced the adsorption capacity of microcystin by the evaluated GACs (r=0.98, Pearson). These results can support the application of the MC-LR adsorption process in water treatment plants to minimize intoxication with contaminated water. Univ Sao Paulo, Sao Carlos, SP, Brazil Univ Metodista Piracicaba, Santa Barbara Doeste, SP, Brazil Univ Estadual Paulista, Rio Claro, SP, Brazil Univ Estadual Paulista, Rio Claro, SP, Brazil
Databáze: OpenAIRE
Externí odkaz: