Rapid and easy quantification of elemental sulphur in aqueous samples from biological reactors: the turbidimetric method revisited

Autor(es)

Gouvea De Godoi, Leandro Augusto ^[1] ; Solcia Guerrero, Renata De Bello ^[1] ; Diniz Dos Santos, Carla Eloisa ^[1] ; Foresti, Eugenio ^[1] ; Zaiat, Marcelo ^[1] ; Rissato Zamariolli Damianovic, Marcia Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo EESC USP, Sao Carlos Sch Engn, Ctr Res Dev & Innovat Environm Engn, Lab Biol Proc, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY; v. 99, n. 9, p. 809-823, JUL 15 2019.
• Citações Web of Science: 0

Resumo

Recent developments in wastewater treatment have led to a renewed interest to obtain elemental sulphur (S degrees) as a by-product from bioreactors. However, practical studies are limited by the gap of adequate analytical techniques for its determination. This paper provides a statistical study and matrix effect evaluation of an adapted spectrophotometric method for routine S degrees analyses in aqueous samples, based on a methodology previously described by Hart (1961). Four complex matrices were tested: domestic sewage and effluent samples from three different bioreactors. Tested performance criteria included linearity, matrix effect, limit of detection and quantification and S degrees recovery. Results were linear (R-2 = 0.99994) in the studied range (5 to 100 mg S degrees L-1) and no matrix effect was observed. The accuracy was based on recovery values that varied from 100% to 106%. The colloidal S degrees separation and extraction protocol was also considered suitable for aqueous samples, reaching more than 99.0% of S degrees recovery. (AU)

• Processo FAPESP: 15/18976-0 - Pós-tratamento de águas residuárias para remoção de compostos nitrogenados utilizando um reator misto horizontal anóxico-aeróbio alimentado com biogás e ar
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• Processo FAPESP: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
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