Citas bibligráficas
Velásquez, M., (2017). Metales en suelos explotados por la pequeña minería aurífera aluvial en Madre de Dios, Perú [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2893
Velásquez, M., Metales en suelos explotados por la pequeña minería aurífera aluvial en Madre de Dios, Perú [Tesis]. : Universidad Nacional Agraria La Molina; 2017. https://hdl.handle.net/20.500.12996/2893
@mastersthesis{renati/1113871,
title = "Metales en suelos explotados por la pequeña minería aurífera aluvial en Madre de Dios, Perú",
author = "Velásquez Ramírez, Manuel Gabriel",
publisher = "Universidad Nacional Agraria La Molina",
year = "2017"
}
Madre de Dios is the region considered the "Capital of Peruvian Biodiversity"; however, it suffers deforestation, soil erosion and possible mercury contamination caused by the alluvial gold mining. The research was carried out at an alluvial gold mining concession in Fortuna community of Madre de Dios. The main objective were the evaluation of soil contamination degree by heavy metals and the evaluation of morphological, physical and chemical characteristics of impacted soils by the alluvial gold mining. It was determined 13 ha with potential interest. There were three types of sub-areas: recently impacted, impacted (6 to7 years ago) and non-impacted. The impacted soils fertility is low. Its chemical characteristics are strong acid reaction (4.24 pH to 5.19 pH), without salt problems (0.03 dS / m to 0.11 dS / m) and carbonates. The levels of organic matter (0.03% to 2.08%), cation exchange capacity (6.88 Cmol (+) kg-1 to 23.84 Cmol (+) kg-1) and potassium are low (18 mg kg -1 to 86 mg kg- 1), and phosphorus is high (55 mg kg -1 to 171 mg kg -1). There is coarse textured with no structure. It was applied multivariate and geostatistical analyzes which indicated that the total average content of As, Ba, Pb, Cu, Cr, Ni, V and Zn were respectively 1.90, 29.80, 4.60, 7.93, 7.95, 12.67, 12.03 and 26.65 mg kg -1, without any contamination according to Peruvian (DS 0022013 MINAM) and Canadian (CCME, 1997) environmental quality standards. These result might be caused by volatilization (Hg), reduced metal retention capacity due to the low clay content, organic matter of these soils and the intense rainfall that activates leaching processes.
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