Impacts of the Residual Trace Metals of Aquaculture in Net Cages on the Quality of Sediment

Anthropogenic pollution by trace metals in aquatic environments in semiarid zones is a critical area of investigation. The objective of this study was to investigate the concentration and spatial distribution of trace metals in surface sediments in the Rosário reservoir, which is affected by the int...

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Published in:	Life (Basel, Switzerland) Vol. 13; no. 2; p. 338
Main Authors:	Melo Júnior, Hênio do Nascimento, de Paula Filho, Francisco José, Menezes, Jorge Marcel Coelho, de Araújo, José Augusto Soares, Gonçalves Santana, Jorge Ederson, Melo, Hênio Vitor Sobral, Vieira, Rosimara de Sales, de Morais Oliveira-Tintino, Cícera Datiane, Tintino, Saulo Relison, Coutinho, Henrique Douglas Melo, Teixeira, Raimundo Nonato Pereira
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 27-01-2023 MDPI
Subjects:	Analysis Anthropogenic factors Aquaculture Aquaculture industry Aquatic environment Brazil Cadmium Causes of Chromium Clay loam Cluster analysis Contamination Copper Distribution Dry season Ecological effects Ecotoxicology Environmental aspects Environmental impact Equipment and supplies Farms Feeds Fish fish farming Fish farms Fish-culture Fisheries Fishes Fishing Food contamination & poisoning Geochemistry Human influences Iron Lead Manganese Mariculture Metal concentrations Metals Micropollutants Multivariate analysis net cage Nickel Oreochromis Organic matter Principal components analysis Reservoirs River sediments Seafood industry sediment Sediment pollution Sediment samplers Sedimentation & deposition Sediments Sediments (Geology) semi-arid Semiarid environments Spatial distribution Statistical analysis Tilapia Trace metals Water pollution Zinc Brazil Ghana trace metals semi-arid fish farming net cage Oreochromis sediment
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Summary:	Anthropogenic pollution by trace metals in aquatic environments in semiarid zones is a critical area of investigation. The objective of this study was to investigate the concentration and spatial distribution of trace metals in surface sediments in the Rosário reservoir, which is affected by the intensive aquaculture of Tilápia-do-Nilo ( ). Sediment samples were collected in three different areas, postculture (PCTV), cultivation (CTV) and control (CTRL) in the dry season in 2019. The granulometric composition, organic matter and concentrations of Fe, Mn, Zn, Cu, Cr, Cd, Pb and Ni metals were determined. Multivariate statistics were used. Geochemical and ecotoxicological indices and a comparison with sediment quality guidelines (SQG) were used. The sediment was characterized by silty clay loam with an average organic matter of 18.76 ± 4.27. The analytical merit figures demonstrated accuracy (metal recoveries in certified standards) between 89 to 99% and high precision (RSD < 5%). The concentration ranges for the metals were Fe: 0.11-0.85 (%), Mn: 14.46-86.91, Zn: 2.6-220.56, Cu: 26.89-98.75, Cr: 60.18-76.06, Cd: 0.38-0.59, Pb: 18.13-43.13, and Ni: 34.4-46.75, all in (mg/kg ). The highest concentration values were found in the CTV areas (Fe: 40 ± 0.22, Mn: 66.48 ± 19.11, Zn: 114.83 ± 59.75 and Cr: 70.85 ± 2.62) and PCTV (Cd: 0.53 ± 0.04, Cu: 71.83 ± 21.20, Pb: 33.71 ± 4.34 and Ni: 44.60 ± 1.79). Pearson's correlation, hierarchical cluster analysis and principal component analysis confirmed the influence of fish farming on metals. Only Ni presented concentration values higher than the reference value established in the SQG. Thus, considering the probable geochemical and ecotoxicological effects, they comprise the two lowest levels of impact.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2075-1729 2075-1729
DOI:	10.3390/life13020338