Genotoxicity of leachates from highly polluted lowland river sediments destined for disposal in landfill

Magdaleno, Anahí; Mendelson, A.; Iorio, Alicia Fabrizio de; Rendina, A.; Morettón, Juan

doi:10.1016/j.wasman.2007.09.027

Cited by 39 publications

(21 citation statements)

References 18 publications

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“…This suggests that the metal concentrations increased in the middle basin due to urban and industrial activities. However, the Pb and Zn levels in MOM (Pb 57.7 mg /kg, Zn 114 mg /kg) and MAM (Pb 130 mg /kg, Zn 261 mg /kg) were lower than those found by Magdaleno et al (2008) deepest section of the profile ranged between 1.3-1.6 mg/kg, 21.0-22.7 mg/kg, 27.4-37.4 mg/kg, and 67.9-77.0 mg/kg, respectively.…”

Section: Total Metal Concentrations In Top Sediments and Vertical Discontrasting

confidence: 57%

“…This river drains directly into the de La Plata River, a huge binational estuary, which is the main source of Downloaded by [Dokuz Eylul University ] at 11:19 04 November 2014 drinkable water for the city of Buenos Aires and its outskirts (Magdaleno et al, 2008). The Matanza-Riachuelo River system is mainly composed of three tributary streams: Morales, Rodríguez, and Cañuelas.…”

Section: Study Areamentioning

confidence: 99%

“…In addition to industrial activities, leachates from a waste dumpsite located near the main course at MAM may constitute a huge pollution potential. In Argentina, these areas accept demolition materials as well as industrial, commercial, and domestic solid wastes Downloaded by [Dokuz Eylul University ] at 11:19 04 November 2014 (Magdaleno et al, 2008). The co-disposal of industrial and domestic wastes in clandestine dumpsites increases the toxic chemical risk for the environment (Schrab et al, 1993).…”

Section: Partitioning Of Metals In Top Sedimentsmentioning

confidence: 99%

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Heavy Metal Partitioning in Bottom Sediments of the Matanza-Riachuelo River and Main Tributary Streams

Rendina

Iorio

2012

Soil and Sediment Contamination: An International Journal

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This study provides geochemical partitioning, potential bioavailability, and enrichment of Cd, Cu, Pb, and Zn in bottom sediments collected from the Matanza-Riachuelo River and its main tributary streams. A modified Tessier sequential extraction procedure, complemented with acid volatile sulfide (AVS) and simultaneous extracted metals (SEM) measurements, was applied to determine the partitioning of metals into four fractions (metals bound to amorphous sulfide, carbonate, and exchangeable), bound to Fe/Mn oxides (reducible), bound to organic matter/sulfide (oxidizable) and residual. Spatial and vertical distributions of metals were studied. The core sediments show a decreasing concentration of metals with depth. In top sediments, non-residual Cu was mainly associated with oxidizable phase, whereas Pb, Cd, and Zn were mainly associated with amorphous sulfide. Pb exhibited the highest enrichment in all sites. The ratio AVS/SEM was greater than one at sediment sections close to the water column, indicating that metals extracted with hydrochloric acid were mainly associated with the amorphous sulfide. The strong influence of amorphous sulfide in the retention of Cd, Pb, and Zn in anoxic sediments of Matanza-Riachuelo river system suggests that dredging and aeration could lead to the remobilization of metals from sediments to the water column, hence making the metals more available to the biota.

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Section: Total Metal Concentrations In Top Sediments and Vertical Discontrasting

confidence: 57%

Section: Study Areamentioning

confidence: 99%

Section: Partitioning Of Metals In Top Sedimentsmentioning

confidence: 99%

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Heavy Metal Partitioning in Bottom Sediments of the Matanza-Riachuelo River and Main Tributary Streams

Rendina

Iorio

2012

Soil and Sediment Contamination: An International Journal

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“…Também foi observada significante redução da toxicidade subcrônica em algas, após a remoção de metais pelo tratamento de efluentes em diferentes localidades dos EUA (Butler et al, 2011). Em conjunto, estes dados corroboram a importante contribuição dos elementos metálicos no efeito tóxico (Magdaleno et al, 2008;Villatoro-Pulido et al, 2008;Asakura et al, 2009;Yadav & Trivedi, 2009). …”

Section: Discussionunclassified

Toxicity Bioassay Validation as a Support for Monitoring Effluent Discharge

Sousa¹,

Padula

Silva

et al. 2013

Ecotoxicol. Environ. Contam.

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Toxicity Bioassay Validation as a Support for Monitoring Effluent Discharge -The present work aimed evaluating the impact of precipitation with sodium hydroxide and sodium sulfide, that clearly reduce the chemical contaminants of the effluent, leading to toxicity reduction. Metal analysis by ICP/AES (Inductively Coupled Plasma/Atomic Emission Spectroscopy), physicochemical analysis (pH) and toxicological analysis (by measuring the production of micronuclei in Allium cepa) were performed in the effluent studied before and after the precipitation. The analysis before treatment showed the extreme acidity of the effluent (pH<1,0), metals above the acceptable level for discharging according to the standards (especially zinc and iron) and significant mutagenicity. After precipitation with sodium sulfide, there was enough reduction in metals concentration to allow the effluent discharging within the limits specified by Conama Resolutions 357/2005 and 430/2011, and with both precipitants the discharging was possible according to the limits specified by 8468/76 Decree (São Paulo State/Brazil) (for the elements studied). There was also significant reduction in mutagenicity after treatment. The use of mutagenicity bioassay with A. cepa as a supplementary protocol to the ones already recommended for effluent analysis is emphasized in the present work.

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“…Many metallurgic, chemical and petrochemical industries as well as meat processing plants and tanneries are located in the river banks, mainly in the lower basin. In addition, other sources of pollution as residential sewage waters, stormwater, and leachate from illegal solid waste dumps also contribute to pollution of the river waters (Magdaleno et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Assessment of heavy metal contamination and water quality in an urban river from Argentina

Magdaleno

Cabo

Arreghini

et al. 2014

Braz. J. Aquat. Sci. Technol.

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In aquatic ecosystems, the potential effects of toxic compounds are greatly determined by their physicochemical forms and bioavailability. The aim of this work was the assessment of metal toxicity to the green algae Pseudokirchneriella subcapitata in contaminated water samples of an urban river (Matanza-Riachuelo, Argentina). A total of 30 samples were analyzed. Physicochemical parameters and total and dissolved metal (Cd, Cu, Cr, Pb, Ni and Zn) concentrations were measured. Toxicity was related as a function of size fractionation and chemical speciation (using the program Mineql+) in the dissolved fraction (<1.2μm). Percentage inhibition of algal growth (%Iw) was estimated as the differences between cultures with and without EDTA additions in the filtered water samples. Concentrations of Cd (1-85μg.L -1 ), Cr (3-164μg.L -1 ), and Ni (10-99μg.L -1 ) in river waters were always lower than the respective EC50 for P. subcapitata, whereas concentrations of Cu (5-306μg.L -1 ), Pb (13-546μg.L -1 ), and Zn (4-380μg.L -1 ) in dissolved fractions resulted above the EC50 values in many samples. Only 10 samples showed algal growth inhibition (between 11.21% and 42.19%), which 8 of them also showed high concentrations of free ionic forms of Pd or Zn. Free ionic concentrations of Cu were always lower than the EC50 for the algae. Two samples resulted toxic to P. subcapitata in spite of the absence of toxic metal concentrations. Besides, 13 samples no inhibited the algal growth and high concentrations of Pd and Zn were obtained, producing expected %Iw values between 10.03% and 90.51%. The absence of toxicity in most samples with toxic metal concentrations could be related to the presence of organic ligands, colloidal organic matter, and antagonism effects among other metals, which reduce their bioavailability.

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Genotoxicity of leachates from highly polluted lowland river sediments destined for disposal in landfill

Cited by 39 publications

References 18 publications

Heavy Metal Partitioning in Bottom Sediments of the Matanza-Riachuelo River and Main Tributary Streams

Heavy Metal Partitioning in Bottom Sediments of the Matanza-Riachuelo River and Main Tributary Streams

Toxicity Bioassay Validation as a Support for Monitoring Effluent Discharge

Assessment of heavy metal contamination and water quality in an urban river from Argentina

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