Data/hora: 11/06/2024 12:40:29

Provedor de dados: | 70
País: | Brazil
Título: | MERCURY IN THE SEDIMENT OF THE UPPER PARNAÍBA RIVER
Autores: | Remor,Marcelo B.; Sampaio,Silvio C.; Rosa,Danielle M.; Model,Kathleen J.; Paloschi,Cristiane L.; Conceição,Fagner G. da.
Data: | 2018-09-01
Ano: | 2018
Palavras-chave: | Trace elements; Agricultural frontier; Heavy metal.
Resumo: | ABSTRACT The contamination of aquatic environments with chemical trace elements can be evaluated by their accumulation in sediments of the water body. Studies on mercury require the use of exclusive extraction techniques that have relatively high costs when compared to the analysis of other trace elements. This study was conducted aiming at determining the mercury concentration in sediments of the Upper Parnaíba River basin, located in a region of agricultural expansion between the states of Piauí and Maranhão. The sediment was collected at 12 sites in the basin. After drying, the quantification of total mercury was performed by the Zeeman atomic absorption spectrometry coupled to a pyrolysis reactor. Mercury concentrations in sediments of the Parnaíba River ranged from 4.2 to 58.5 ng g−1 and presented a low probability of adverse effects on biota. Mercury had no correlation with the variables clay, silt, sand, total organic carbon, iron, and aluminum, demonstrating its possible anthropogenic origin. Although mercury concentrations have a low probability to disturb the balance of the local ecosystem, there is a need for monitoring the region in order to quantify the risks to biota and human health.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000500760
Editor: | Associação Brasileira de Engenharia Agrícola
Relação: | 10.1590/1809-4430-eng.agric.v38n5p760-767/2018
Formato: | text/html
Fonte: | Engenharia Agrícola  v.38 n.5 2018
Fonte: | info:eu-repo/semantics/openAccess