Lam Vivanco, Adriana; Espinoza Carrión, Flor María; Espinoza, Juan José; Aviles Vera, Tatiana; Centeno Sandoval, Máxima
(2021)
In the upper part of the province of El Oro (Por-tovelo- Sector Pache), mining activities are carried out that leave heavy metals in their waste in a free state, such is the case of arsenic, which contaminates the ...