摘要
通过腐殖酸的Zeta电位和粒径的变化规律研究,探讨化学条件对腐殖酸的荷电状态和聚集状态的影响。结果表明,腐殖酸具有自我凝聚的特性;在pH较低和溶液离子强度较高时,腐殖酸胶粒的Zeta电位绝对值减小而聚合度增大,从而使腐殖酸胶粒聚集而凝聚;随腐殖酸浓度增大,腐殖酸胶粒的Zeta电位绝对值增大,腐殖酸胶粒的缩聚程度降低而使粒径减小。
By studying the changing rules of the Zeta potential and particle size, the effect of chemical con- ditions on the states of the charge and aggregation of the humic acids（HAs） was discussed. It was found that the HAs had the property of self-flocculation. With the lower pH and the relatively higher ionic strength,the absolute values of Zeta potential for the HA colloidal particles decreased with polymerization degree increasing, thereby forming micelle aggregation and coagulation. Moreover,with the increasing of the HA concentration and subse- quently the increasing of the absolute values of Zeta potential, the condensation degree of the HA colloidal parti- cles decreased, which resulting in the state with the smaller particle sizes.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第4期1539-1542,共4页
Chinese Journal of Environmental Engineering
基金
西安建筑科技大学基础研究基金项目(JC1307)
关键词
腐殖酸
荷电特性
聚集特性
humic acid
charged characteristics
aggregation properties
