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de Carvalho VS, Felix CSA, da Silva Junior JB, de Oliveira OMC, de Andrade JB, Ferreira SLC. Determination and evaluation of the ecological risk of mercury in different granulometric fractions of sediments from a public supply river in Brazil. MARINE POLLUTION BULLETIN 2023; 192:115083. [PMID: 37245321 DOI: 10.1016/j.marpolbul.2023.115083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 05/30/2023]
Abstract
This work reports the quantification of total mercury in sediments collected in periods with and without rain from the Joanes River, Bahia, Brazil. Determinations were made using Direct Mercury Analysis (DMA), the accuracy of which was confirmed with two certified reference materials. The highest total mercury concentrations were found at the sampling point close to commercial areas and large residential condominiums. On the other hand, the lowest levels were found in the site close to a mangrove region. The geoaccumulation index was applied to the total mercury results, evidencing low contamination in the region studied. The contamination factor showed that of the seven stations investigated, four samples collected in the rainy season showed moderate contamination. The results of the ecological risk assessment were utterly consistent with the contamination factor data. This study showed that the smaller sediment particles concentrate more mercury, corroborating what has been predicted by the adsorption processes.
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Affiliation(s)
- Vanessa S de Carvalho
- Universidade Federal da Bahia, Instituto de Química, Campus Ondina, 40170-270 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto Nacional de Ciência e Tecnologia de Energia & Ambiente, INCT, 40170-115 Salvador, Bahia, Brazil
| | - Caio S A Felix
- Universidade Federal da Bahia, Instituto Nacional de Ciência e Tecnologia de Energia & Ambiente, INCT, 40170-115 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Centro Interdisciplinar de Energia & Ambiente, CIEnAm, 40170-115 Salvador, Bahia, Brazil.
| | - Jucelino B da Silva Junior
- Universidade Federal da Bahia, Instituto Nacional de Ciência e Tecnologia de Energia & Ambiente, INCT, 40170-115 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto de Geociências, Campus Ondina, 40170-270 Salvador, Bahia, Brazil
| | - Olivia M C de Oliveira
- Universidade Federal da Bahia, Instituto de Geociências, Campus Ondina, 40170-270 Salvador, Bahia, Brazil
| | - Jailson B de Andrade
- Universidade Federal da Bahia, Instituto Nacional de Ciência e Tecnologia de Energia & Ambiente, INCT, 40170-115 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Centro Interdisciplinar de Energia & Ambiente, CIEnAm, 40170-115 Salvador, Bahia, Brazil; Centro Universitário SENAI, CIMATEC, Avenida Orlando Gomes, 1845, 41650-000 Salvador, Bahia, Brazil
| | - Sergio L C Ferreira
- Universidade Federal da Bahia, Instituto de Química, Campus Ondina, 40170-270 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto Nacional de Ciência e Tecnologia de Energia & Ambiente, INCT, 40170-115 Salvador, Bahia, Brazil.
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