摘要
本文采用多种仪器和化学分析方法对酸性矿山废水污染河流中的细微尾矿砂颗粒的物理化学特性,如矿物组成、化学成份、粒径分布及比表面积等进行了表征。同时实验研究了尾矿砂颗粒表面特性,计算求解了颗粒表面双电层结构中的表面电荷密度σ_0,表面总吸附位N_s,pH_(zpc和pH_(lcp),最后,应用表面络合三层模式计算求取了尾矿砂颗粒表面固有常数K_(al)^(int),K_(a3)^(int)及表面络合稳定常数K_(Na)^(int)和K_(NO_3^-)^(int)
Fine-grained ore tailing particles represent a large fraction of substances transported in Dawu-Lo An river containated with acid mine drainage and alkaline waste water from the floatation plant. These particles are also responsible for the transport of many adsorbed pollutant substances from the acid mine drainge. In the paper, characterizations of physical-chemistry and surface properties of ore tailing particles were studied by various experimental methods. Surface charge, adsorption density, intrinsic ionzation and complexation constants of ore tailing particles were determined and calculated by potentiometric titration method and the stoichiometry of surface reactions. These results provide necessary data for the study on the transport process and adsorption of heavy metals by ore tailing particles.
出处
《环境化学》
CAS
CSCD
北大核心
1993年第5期347-355,共9页
Environmental Chemistry
关键词
尾矿砂
表面特征
吸附
颗粒
ore tailing particles, surface properties, adsorption.
