Characterization and ecotoxicological risk assessment of sewage sludge from industrial and non-industrial cities

Human and ecotoxicological risk assessment of heavy metals in polymer post treatment sludge from Barekese Drinking Water Treatment Plant, Kumasi

“…According to [23] , sorption, inner and outer sphere complexation, and precipitation processes cause metals to accumulate in the PTS during the water treatment process at Barekese WTPs. The composition of the polymer post-treatment sludge may vary depending on the quality or characteristics of the source of water for treatment obtained directly from the river and lake sources, rainfall, and season.…”

“…Through exposure routes such as ingestion, inhalation, and dermal contact, toxic metals in sludge can also pose significant health risks to humans, including cancer (skin, lungs, liver, bladder) and non-carcinogenic effects like gastrointestinal and kidney dysfunction, respiratory issues, diarrhea, fatigue, weakness, nausea, vomiting, and throat irritation [15] , [24] . Several studies attest to the bioaccumulation of potentially hazardous metals brought on by the cheaper and alternative use of sludge as organic fertilizer from WTPs, which ends up in the food chain [20] , [23] , [25] . The nature and composition of the polymer post-treated sludge, features of the sources, duration and consistency of application, soil physicochemical parameters, plant species, and management strategies all influence the degree to which the food chain becomes bioaccumulated from its use for agricultural farming [23] .…”

“…Several studies attest to the bioaccumulation of potentially hazardous metals brought on by the cheaper and alternative use of sludge as organic fertilizer from WTPs, which ends up in the food chain [20] , [23] , [25] . The nature and composition of the polymer post-treated sludge, features of the sources, duration and consistency of application, soil physicochemical parameters, plant species, and management strategies all influence the degree to which the food chain becomes bioaccumulated from its use for agricultural farming [23] . Therefore, it is crucial to determine the heavy metal concentrations of polymer sludges and assess the risks before applying them to the soil and as feedstock for the aquatic community.…”

Avaliação da toxicidade do retardador de chamas Tetrabromobisfenol A em matriz de efluente doméstico sintético e isolado

“…Apesar da ausência de especificações, o fato da legislação apontar para a necessidade do efluente não apresentar nenhum efeito adverso sobre os organismos dos corpos hídricos receptores em exposição aguda ou crônica ressalta a importância do uso desta ferramenta (bioensaios) para monitorar a qualidade dos tratamentos. Zagatto; Goldstein; Bertoletti (1988) O monitoramento de efluentes deve ser contínuo e específico para cada caso, uma vez que a composição dos efluentes industriais e domésticos variam ao longo do tempo (LAQUAZ et al, 2018;PEREAO;AKHARAME;OPEOLU, 2021;SUNDHA et al, 2022).…”

“…Além disso, efluentes industriais contêm maiores concentrações de compostos com potencial de toxicidade na biota aquática. Um estudo realizado na Índia com foco na presença de metais no lodo de ETEs, revelou que o potencial de risco ecológico de efluentes de áreas industriais é aproximadamente 30 vezes maior que o de áreas não industriais (SUNDHA et al, 2022).…”