摘要
风化煤具有不同孔径和较大的比表面积,又含有大量腐殖酸,其羧基、羟基等活性含氧官能团具有离子交换和络合能力,对各种含重金属离子废水有良好的净化效果.加之风化煤资源丰富、价格低廉,因而是一种很有希望的吸附剂.我们对风化煤吸附镉的动力学特征及影响吸附净化的因素进行了初步探讨.
A study on adsorption kinetics of Cd on weathered coal and the factors influencing the process revealed that the process can be represented by the following equation:
where effective diffusivity, D, is in a range of 10-6-10-7mm2/s. Relation between temperature and the adsorption velocity is given by:
D = 1.01exp(-46.33/T)(mn2/s) The active energy of diffusion is 92.1 cal/mol.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1990年第1期112-117,共6页
Acta Scientiae Circumstantiae
关键词
风化煤
镉
吸附
动力学
adsorption kinetics
cadmium
weathered coal.
