New method to estimate total elements of chromium (VI), nickel and iron to analyze their mobility and spatial distribution from an open dump

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Carrera-Villacré, D.V.^1,2 ; Merizalde-Mora, M.J.^1 ; Viera-Torres, R.M.^1

Departamento de Ciencias de la Tierra y Construcción, Carrera de Ingenieria Geográfica y Del Medio Ambiente, Ecuador^1

Universidad Central Del Ecuador, Facultad de Ingenieria Geologia Minas Petróleo y Ambiental, Quito, Ecuador^2

关键词: Aqueous extracts;    Chemical characterization;    Concentration limits;    Contamination problem;    Ecuador;    Global problems;    Know-that;    Planning studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012090/pdf
DOI  :  10.1088/1755-1315/191/1/012090

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Open dumps are a global problem due to their scant planning studies. In Ecuador, many of the dumps are of this type, operating for several years, as in the case of the open dump of Portoviejo, which is in its technical closure stage. The current study determined the physical-chemical characterization of the soils around the dump, and the concentration in aqueous extracts of Chromium (Cr (VI)), Nickel (Ni) and Iron (Fe). Therefore, a methodology for the estimation of total, soluble and fixed elements based on the theory of maximums and minimum through leaching curves have been proposed. The results have been compared with the permissible concentration limits of the Ecuadorian Regulation where Ni presents serious enrichment. Finally, the spatial distribution of the soluble elements have been performed in order to relate to the processes of mobility and availability in the soil, this let know that soils with possible contamination problems are oriented to the southern part of the dump towards the city of Portoviejo and could possibly be causing pollution in that area.