Contamination risks and impacts caused by the disposal of dairy effluent in red-yellow latosol
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.001.0006Keywords:
Reuse, Leaching Column, Mobility of IonsAbstract
Objective with this study, was to determine the risk of contamination and the impacts that the sodium, potassium, calcium and magnesium ions present in dairy waste water can cause by leach column tests. For this, columns were assembled from the successive deposition of layers of soil with two centimeters of thickness and their subsequent compaction in the interior of the PVC tube until formation of a column with 0,15 m of height, later they were saturated with distilled water and using Mariotte vials the doses corresponding to zero, 250; 625; 1250; 2500 mg L-1 Na of effluent from dairy products. The leachates were collected, determining the concentrations of Na, Ca, Mg and K by atomic absorption spectrophotometry. The results of the tests in leach columns showed the interaction preference of K> Ca> Na> Mg, regardless of the dilution of the effluent, following the order of reactivity of the ions. These results alert the care of the disposition of this, since the interaction between the solutes present in the wastewater of dairy with the soil in case of inadequate application, can result in the salinization of the soil and even in salinization of the water table due to leaching of sodium.
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