摘要
天然水体中泥沙组成具有非恒定性和非均匀性,而不同粒径泥沙的吸附能力差异很大。因此。讨论天然水体中泥沙对重金属污染物的自净能力,必须研究不同粒径泥沙共存(即非均匀沙)的吸附模式。通过系统室内静态试验,研究了不同粒径泥沙共存吸附的吸附动力学模式。它表明,不同粒径泥沙共存吸附体系各粒径之间不存在竞争和干扰,共存体系单位重量泥沙的吸附量等于各粒径泥沙单独存在,在相同条件下单位重量泥沙的吸附量乘以其在共存体系中所占份额的和。这在一定程度上解决了天然河流水体泥沙吸附量的计算问题。
The composition of sediment in natural rivers has non-steadiness and non-uniformity, and adsorption capacity of different grain sizes is different. Therefore, when self-purify abilities of sediment in natural waters for heavy metal pollutants are discussed, concurrent adsorption kinetics model of sediment with different grain sizes must be studied. This paper presents the concurrent adsorption kinetics model by sediment with different grain sizes through systematic laboratory experiments. It indicates that there is no competition or interference.among different grain sizes, the adsorption content of heavy metal pollutants by non-uniform sediment equals to the sum of the adsorption contens of each grain sizes under the same conditions, which can be used as the basis of predicting the adsorption of non-uniform sediment in natural rivers, to some extent,
出处
《水科学进展》
EI
CAS
CSCD
1996年第2期138-143,共6页
Advances in Water Science
基金
国家自然科学基金
中国博士后科学基金
关键词
非均匀泥沙
共存吸附
动力学模式
non-uniform sediment
concurrent adsorption
kinetics model.
