ACKNOWLEDGMENT This work was financed by CONCYTEC-FONDECYT within the call for projects E041-01 [Contract Number 031-2019]

In this work it is proposed the usage of montmorillonile for zinc and copper ion removal from electrochemicai effluents. The initial concentrations of zinc etfluents analyzed in this work, varied between 1O and 94 ppm in Zn2+, being the pH between values 6-7. The obtained percentage of removal with calcic and sodic montmorillonite surpassed in all the cases 98%. The initial concenlrations of copper effluents oscillated between 16 and 160 ppm. in Cu2•. In the treatment of these effluents with calcic montmorillonite an elimination between 98.5 and 85.5% was reached al pH values between 4-5. In both cases it was used a relation of 5 grams ot clay 1200 milliliters of effluent for one hour agitation .

In this work it is proposed the usage of montmorillonile for zinc and copper ion removal from electrochemicai effluents. The initial concentrations of zinc etfluents analyzed in this work, varied between 1O and 94 ppm in Zn2+, being the pH between values 6-7. The obtained percentage of removal with calcic and sodic montmorillonite surpassed in all the cases 98%. The initial concenlrations of copper effluents oscillated between 16 and 160 ppm. in Cu2•. In the treatment of these effluents with calcic montmorillonite an elimination between 98.5 and 85.5% was reached al pH values between 4-5. In both cases it was used a relation of 5 grams ot clay 1200 milliliters of effluent for one hour agitation .

The reduced acceleration of the organic matter in the soil has been affecting its properties, making it necessary to repeat the use and management of organic fertilizers. The objective of research was to evaluate the effect of two fertilizers application, Island Guano (IG) and sheep manure (SM), on the following three physical properties of the soil: bulk density, water-stable aggregates and penetration resistance, under quinoa (Chenopodium quinoa Willd) cultivation, Hualhuas variety. These properties were determined by beveled cylinder, Yoder wet-sieving and dynamic cone penetrometer methods and under a completely randomized block design, with factorial arrangement of two factors (IG and SM) and three levels per factor (0; 0.5 and 1 t*ha-1 for IG and 0; 2.5 and 5 t*ha-1 for SM), nine treatments were evaluated, with three repetitions, so 27 total experimental units. Results showed that c...

The reduced acceleration of the organic matter in the soil has been affecting its properties, making it necessary to repeat the use and management of organic fertilizers. The objective of research was to evaluate the effect of two fertilizers application, Island Guano (IG) and sheep manure (SM), on the following three physical properties of the soil: bulk density, water-stable aggregates and penetration resistance, under quinoa (Chenopodium quinoa Willd) cultivation, Hualhuas variety. These properties were determined by beveled cylinder, Yoder wet-sieving and dynamic cone penetrometer methods and under a completely randomized block design, with factorial arrangement of two factors (IG and SM) and three levels per factor (0; 0.5 and 1 t*ha-1 for IG and 0; 2.5 and 5 t*ha-1 for SM), nine treatments were evaluated, with three repetitions, so 27 total experimental units. Results showed that c...