3 documents found, page 1 of 1
O impacto industrial na composição química das águas subterrâneas com enfoque d...
Mirlean,Nicolai; Machado,Maria Isabel; Osinaldi,Guillermo Martinez; Demoliner,Adriana; Baisch,PauloThe alteration in the quality of groundwater in the industrial zone of Brazil's southernmost state was assessed by a hydrogeochemical study. In 70-85% of the studied area, fluoride, nitrate and phosphate in groundwater surpass the maximum limits for human consumption according to Brazilian environmental legislation. The chemical spectrum of contaminants and their spatial distribution show that fertilizer produc...
Avaliação de poluição do ar por chumbo particulado: uma abordagem geoquímica
Vanz,Argeu; Mirlean,Nicolai; Baisch,PauloHigh lead concentrations up to 5478 mg kg-1 were detected in dry atmospheric precipitations in Rio Grande city and adjacent area. Lead anomalies cover up to 30% of the study area. Lead concentration measurement in dry atmospheric precipitation and suspended particulate matter provides a possibility to detect concentrations above lead threshold in the air. The most impacted areas are fishermen's villages. The mo...
Níveis e origem da acidificação das chuvas na região do Rio Grande, RS
Mirlean,Nicolai; Vanz,Argeu; Baisch,PauloThe current article presents the first data on physical-chemical parameters of wet precipitation collected at single collection point in the city of Rio Grande, during the period of 12 months in 1997-1998. The employed technique of rainwater separation into several portions made clear the process of the atmosphere self-purification during a precipitation event. The pH of rainwater depends on the extent of indus...