期刊论文详细信息
Bioscience Journal
Electrochemical attributes of soils influenced by sugarcane vinasse
José Maria Lima1  Nilton Curi1  Geraldo César Oliveira1  Bruno Teixeira Ribeiro2 
[1] Universidade Federal de Lavras;Universidade Federal de Uberlândia;
关键词: Soil chemistry;    Zeta potential;    Soil pH;   
DOI  :  
来源: DOAJ
【 摘 要 】

The electrochemistry at the surface of colloidal particles in soils is related to important physical and chemical phenomena, such as flocculation and dispersion of soil particles, cation-exchange-capacity, anion adsorption, pesticides and heavy metals adsorption. Sorption of organic compounds on the surface of soil components may cause important changes on their electrochemical attributes. The vinasse has been applied in soils, mainly in sugarcane crops, as organic fertilizer. Its effects on physical, chemical and biological attributes of soils are well documented; however, little is known about the effects on electrochemical attributes. This work aimed to evaluate the effects of sugarcane vinasse on soil pH and zeta potential of the clay fraction of two Latosols (Oxisols) and an Argisol (Ultisol). The pH of soils amended with vinasse was measured in water and 1M KCl solution (ratio soil:water 1:2.5), and estimated the ΔpH (pH 1M KCl - pH in water). The zeta potential (ζ) of the clay fraction was determined by electrophoretic mobility in 0,01M NaCl solution adjusted to different pH values (2, 3, 5, 6, 7, 9 and 11), and estimated the point of zero charge (PZC) (ζ = 0). The soil pH and net charge of soils were clearly influenced by vinasse. These changes may influence important chemical and physical phenomena in soils and also help future studies involving vinasse in soils.

【 授权许可】

Unknown   

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