Bibliographic citations
Leyva, M., (2022). “Relación de concentración ácidos húmicos y fúlvicos en la biodisponibilidad de metales pesados en el sedimento del humedal Collotacocha – Ancash” [Universidad Nacional de Trujillo]. https://hdl.handle.net/20.500.14414/20191
Leyva, M., “Relación de concentración ácidos húmicos y fúlvicos en la biodisponibilidad de metales pesados en el sedimento del humedal Collotacocha – Ancash” []. PE: Universidad Nacional de Trujillo; 2022. https://hdl.handle.net/20.500.14414/20191
@phdthesis{renati/1044845,
title = "“Relación de concentración ácidos húmicos y fúlvicos en la biodisponibilidad de metales pesados en el sedimento del humedal Collotacocha – Ancash”",
author = "Leyva Collas, Mario Vladimir",
publisher = "Universidad Nacional de Trujillo",
year = "2022"
}
The purpose of the following investigation is to show the character of bioavailability that heavy metals present, taking into account the percentage distribution ratio of humic and fulvic acids in the sediment of the Collotacocha high Andean wetland. By determining the concentration of organic acids (humic and fulvic) and the speciation of heavy metals in the sediment by Tessier sequential chemical extraction. The collection of samples and analysis were carried out in 8 sampling stations, the analysis of heavy metals: aluminum, arsenic, iron and lead, and speciation by sequential extraction were carried out in the UNASAM laboratories. The data obtained show that the organic acids analyzed have a higher concentration of humic acids in relation to fulvic acids, in the sequential chemical extraction results were found that indicate that the concentration of heavy metals in the fraction that corresponds to exchangeable ions and adsorbed to carbonates is: 27.3%, As 28.0%, Fe 26.3% and Pb 20.9% (maximum values), which corresponds to the bioavailable extract. From the results shown in the investigation, it is concluded that the higher the concentration of humic acids with respect to fulvic acids in the wetland sediment, the bioavailability of metals decreases significantly.
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