Influência da velocidade da agitação sobre a dispersão de argila e eficiência de concentrações de sódio como dispersante químico

• Main Authors: Matheus Vinicius Abadia Ventura, Patrícia Carolline dos Santos Chagas, Lucas da Silva Alves, Marcio Moacir Bessa
• Format: Article
• Language: English
• Published: Universidade Federal do Tocantins 2016-12-01
• Series: Desafios
• Subjects: granulometry; rpm; agitator
• Online Access: https://sistemas.uft.edu.br/periodicos/index.php/desafios/article/view/2784/9291

The particle size of the soil is a very important parameter for characterizing and understanding the physical dynamics of the soil, being one of the main analysis that determines the characteristics of the soil. The Nitossolos Red Eutrophic (NVE) are strongly developed soils, an agronomically important soil and with high risk of erosion. The objective of this study was to test the speed most appropriate vertical agitation in determining the clay dispersion and the efficiency of different concentrations of NaOH as chemical dispersant on the particle size analysis. NVE samples were collected, placed to air dry and sieved / destorroadas, heavy 36 samples of 25 g, 4x3 factorial design was used, 4 NaOH concentration and agitation speeds 3 with 3 repetitions. There are 4 treatments, the concentrations were 0.0; 0.5; 1.0 and 1.5 mol NaOH, and the speeds 9000, 12000 and 18000 rpm. The results showed that the stirring speed of 9000 rpm using a concentration of 0.5 mol of sodium hydroxide was larger percentage of the clay dispersion. Sodium hydroxide at a concentration of 0.5 mol is more efficient in the chemical dispersion of soils analyzed independent of the stirring rate.