Study on injection of inorganic salts into soil by electrokinetic method
利用电动力学方法向土壤注入无机盐研究

The impacts of electrode manipulation pattern, voltage and time on the distribution of inorganic salts during the electrokinetic injection into soils were studied. The results showed that the inorganic salts were distributed more uniformly when the electric field reversed its direction periodically. The electrokinetic method could inject sulfate into soils effectively in a short period (24~36 h), and the concentration of the sulfate ion increased with time. The loss of effective N-containing nutrients occurred due to the complex transformations between different species of N in electric field. Thus, the injection time for nitrate ion should not be too long, better less than 72 h. In order to keep N-concentration at a high level in soils, the potential of 0.5 V/cm is considered to be appropriate since nitrate moves more quickly.