Orbital - Vol. 7 No. 4 - October-December 2015
FULL PAPERS

Environmental Implications of a Stabilization Pond Effluent Released in Paraná River at Ilha Solteira, Brazil: The Quality of Water and Sediment

PDF
  • Douglas P. Pedroso,
  • Felipe A. Santos,
  • Alexandre O. Jorgetto,
  • João G. T. Queluz,
  • Bruno P. Rocha,
  • Sônia M. A. Jorge,
  • Marco Antonio U. Martines,
  • Gustavo R. Castro
Douglas P. Pedroso
Institute of Bioscience, São Paulo State University
Felipe A. Santos
Institute of Chemistry, Federal University of Mato Grosso do Sul
Alexandre O. Jorgetto
Institute of Bioscience, São Paulo State University
João G. T. Queluz
Institute of Bioscience, São Paulo State University
Bruno P. Rocha
Institute of Bioscience, São Paulo State University
Sônia M. A. Jorge
Institute of Bioscience, São Paulo State University
Marco Antonio U. Martines
Institute of Chemistry, Federal University of Mato Grosso do Sul
Gustavo R. Castro
Institute of Bioscience, São Paulo State University
Published December 25, 2015
Keywords
  • BCR sequential extraction,
  • metal species,
  • benthic organisms
How to Cite
(1)
Pedroso, D. P.; Santos, F. A.; Jorgetto, A. O.; Queluz, J. G. T.; Rocha, B. P.; Jorge, S. M. A.; Martines, M. A. U.; Castro, G. R. Environmental Implications of a Stabilization Pond Effluent Released in Paraná River at Ilha Solteira, Brazil: The Quality of Water and Sediment. Orbital: Electron. J. Chem. 2015, 7, 348-357.

Copyright (c) 2015 Orbital: The Electronic Journal of Chemistry

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Sewage treatment plants in Ilha Solteira City, which consist of stabilization ponds, have been modifying water and sediment characteristics around sewage outfall area. Water quality parameters such as dissolved oxygen (OD) and conductivity were directly influenced by the sewage outfall. OD values were reported before (6.36 mg L-1) and after (2.94 mg L-1) the sewage outfall. Measurement of organic matter content in the sediment showed the same pattern, with values of 1.34% and 4.80% for the SP1 and SP3 samples, respectively. A copper and zinc analysis indicated that metals are being transported through the water column, and SP3 is an important sedimentation zone. The total concentrations reported for copper are 6.48, 26.97, 37.54, 27.12 and 18.55 mg kg-1 for SP1, SP2, SP3, SP4 and SP5, respectively, and the total concentrations for zinc are 11.21, 48.53, 67.41, 58.62 and 24.76 mg kg-1. Bureau Community of Reference (BCR) sequential extraction indicated the following bioavailability order of copper and zinc: SP1 < SP5 < SP4 < SP3 < SP2. At SP2, more than 70% of the copper and zinc is found in bioavailable fractions. Benthic organism’s analysis indicates that the Oligochaetes correlation with organic matter content is related to the decrease in water quality.

DOI: http://dx.doi.org/10.17807/orbital.v7i4.777

PDF