摘要
研究了土壤的一些理化性质对土壤动电修复过程的影响,结果表明该土壤的酸碱缓冲能力较强,在动电过程不易被酸化或碱化,该零电位点约为pH=3.3,动电过程土壤pH的改变将影响电渗流的大小和方向,进而影响污染物迁移方向和去除效率,同时Cr(Ⅵ)在土壤上的解吸率随pH增大而增大,吸附量随着pH的增加而变小且在pH>5.5吸附量急剧下降。因此提高Cr(Ⅵ)动电去除效率可考虑尽量提高土壤中的pH值。
The effect of physical and chemistry property on electrokinetic prcess was studied. Acid/base buffer capacity of the soil was bigger, and the soil was not aeidifieated or alkalized easily. The zero potential of the soil was pH = 3.3, the pH variation of soil would effect the the direction and dimension of electroosmosis, and effect the migration of pollutant and removal efficiency, meantime, the desorption rate of Cr（Ⅵ） increased as the value of pH increased, conversely adsorptive capacity was fell down sharply when the value of pH was less than 5.5. The removal efficiency of Cr（Ⅵ） could improved by increasing the value of pH of soil.
出处
《广州化工》
CAS
2009年第9期138-140,共3页
GuangZhou Chemical Industry
关键词
动电过程
酸碱缓冲
ZETA电位
吸附
eleetrokinetic prcess
acid/base buffer capacity
zeta potential
absorption
