Distribution and ecotoxicology of bioavailable metals and As in surface sediments of Paraguacu estuary, Todos os Santos Bay, Brazil

MARINE POLLUTION BULLETIN

卷:99

Article

Pereira, Tais de S.¹  Moreira, Icaro T. A.^1,2  de Oliveira, Olivia M. C.^1,4  Rios, Mariana C.¹  Filho, Wilton A. C. S.³  de Almeida, Marcos¹  de Carvalho, Gilson Correia¹ 

[1] Univ Fed Bahia UFBA, Nucleo Estudos Ambientais, Inst Geociencias, BR-40170290 Salvador, BA, Brazil

[2] Univ Salvador UNIFACS, Escola Engn & TI, Energia, Salvador, BA, Brazil

[3] Fundacao Univ Fed Rio Grande, Inst Oceanog, Lab Estudos Oceanos & Clima, BR-96203900 Rio Grande, RS, Brazil

[4] Univ Fed Bahia UFBA, Dept Geofis Aplicada, Inst Geociencias, BR-40170290 Salvador, BA, Brazil

关键词: Bioavailability;    Metals;    Sediments;    Estuaries;   

DOI  :  10.1016/j.marpolbul.2015.07.031

来源: Elsevier

【 摘 要 】

Surface sediments collected in the intertidal zone of Paraguay estuary in July, 2013, were analyzed for organic matter, nitrogen, phosphorus, grain size fractions and partial concentrations of 16 metals. The USEPA 3051A method and ICP-OES and CV-AAS techniques were chosen to metal analysis. Pollution indices (EF, I-geo and PIN) and a comparison with sediment quality guidelines (UET, ERL, ERM, TEL and PEL of NOAA) were conducted in order to evaluate the potential metal impacts over the area. Principal Component Analysis (PCA) and Pearson correlation results showed the importance of organic matter content and the fine-grained fraction of sediments on the control of the bioavailable metals distribution. The Paraguay estuary already has anthropogenic enrichment relative to the background level, especially for Mn, whose values exceeded almost 30 times the background at one site (Mn: 1197.30 mg kg(-1)). However, metal levels are still below the reference values with the exception of Hg at one site (Hg: 0.25 mg kg(-1), exceeded TEL and ERL). (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free