Autor(es)

Leite, Luan de Souza ; Daniel, Luiz Antonio ; Bond, Tom

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY; v. 9, n. 11, p. 16-pg., 2023-10-06.

Resumo

Algal organic matter (AOM) is a major precursor of disinfection by-products (DBPs) during disinfection. The goal of this study was to critically review available literature about DBP formation from AOM chlor(am)ination. Fifty-six documents from 2010 to 2022 were selected from Web of Science and Scopus databases for further analysis. Previous AOM characterization can indicate DBP formation, but there are no universal predictive parameters and extensive characterization is beneficial. Disinfection parameters (e.g., disinfectant type, dose and contact time), AOM characteristics (e.g., algal species and growth phase), and water quality (e.g., pH, temperature, concentrations of bromide and iodide) all impact DBP yields. Formation of DBPs from AOM is often dominated by trihalomethanes (THMs) and haloacetic acids (HAAs), which reached maximum yields of THMs 177 and 52 mu g mg DOC-1, respectively, during formation potential tests. However, yields of haloacetonitriles (HANs) and haloacetamides (HAcAms) can be notably high on occasion, as indicated by respective maximum yields of 103 and 160 mu g mg DOC-1 during chlorination of Synechococcus sp. of algae. AOM treatment methods require careful evaluation, considering that some can increase DBP formation, notably ozone (22-781%) and UV (5-95%). Conventional treatment processes resulted in AOM removal typically <65%, thus additional processes, such as ultrafiltration and/or adsorption, downstream of clarification are likely required to effectively control DBP formation from AOM. (AU)

• Processo FAPESP: 19/05759-1 - Estudo da remoção da Matéria Orgânica Algal (MOA) por coagulação-floculação e emprego de pré-tratamentos
• Beneficiário: Luan de Souza Leite
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/12202-0 - Formação de subprodutos da desinfecção a partir da cloração e cloraminação da matéria orgânica algal
• Beneficiário: Luan de Souza Leite
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado