Flocculation kinetics: a comparative study on the use of polyaluminium chloride with high and low basicity and alum

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSeneda, Roberta Mitani [UNESP]-
Autor(es): dc.creatorGarcia, Geane Fagundes [UNESP]-
Autor(es): dc.creatorReis, Adriano Goncalves dos [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:56:21Z-
Data de disponibilização: dc.date.available2022-02-22T00:56:21Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-03-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/S1413-415220190297-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209390-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209390-
Descrição: dc.descriptionAluminum sulfate (AS) is widely used as a coagulant in conventional drinking water treatment facilities. Alternative coagulants are commercially available, including polyaluminium chloride (PAC). However, comparative studies between AS and PAC with high (PAC-AB) and low (PAC-BB) basicity regarding flocculation kinetics are still scarce. In this sense, the aim of this work is to compare the use of PAC-BB, PAC-AB, and AS via coagulation, flocculation, and sedimentation as well as to evaluate the effect on electrical conductivity, sludge formation, alkalinity, pH, and turbidity removal based on flocculation kinetic and floc morphology. The results indicated that the increase in electrical conductivity was 8.1% and the sludge formation was 30.6 mg.L-1, and that there was no significant difference between coagulants. PAC-AB presented the lowest alkalinity consumption and, consequently, the lowest pH reduction. Turbidity removal was statistically equal between PAC-BB (91.8 +/- 3.7%) and PAC-AB (91.5 +/- 1.1%), but higher than in AS (82.2 +/- 6.4%). This difference is accentuated with the increase in critical settling velocity. The floc aggregation constant (K-A) is statistically equal among the coagulants, and the better turbidity removal performance of the PACs in relation to the AS is due to the lower floc breaking constant (K-B) and may, therefore, infer that the flocs formed with PAC-AB and PAC-BB are stronger than those formed with SA.-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Ciencia Tecnol, Sao Jose Dos Campos, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Ciencia Tecnol, Sao Jose Dos Campos, SP, Brazil-
Formato: dc.format283-290-
Idioma: dc.languagept_BR-
Publicador: dc.publisherAssoc Brasileira Engenharia Sanitaria Ambiental-
Relação: dc.relationEngenharia Sanitaria E Ambiental-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectcoagulation-flocculation-sedimentation-
Palavras-chave: dc.subjectpolyaluminium chloride-
Palavras-chave: dc.subjectsweep-
Palavras-chave: dc.subjectfloc-
Título: dc.titleFlocculation kinetics: a comparative study on the use of polyaluminium chloride with high and low basicity and alum-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.