含银废水中浮游动物的调查研究

A Study on Zooplankton in the Wastewater Containing Silver.

本文调查了无锡电影胶片厂含银废水中浮游甲壳类的季节变化情况.结果表明,种类和生物量大小与水体中银浓度有一定关系,银浓度高时,种类数和生物量小;银浓度低时,则相反.主要优势种有多刺裸腹溞、长肢秀体溞、台湾温剑水蚤、广布中剑水蚤.利用凤眼莲净化含银废水之后,水体中微型动物的种类、数量和生物量有明显变化.种类和生物量大小依次为:凤眼莲根系>凤眼莲下水柱>对照水体(未种凤眼莲).

Zooplanktonic Crustacea in some water bodies containing silver in Wuxi Cinefilm Factory was investigated. According to the seasonal sample analysis, there are 3 species in the balance pool, 7 species in the oxidizing ditch, 10 species in the oxidizing pond, 11 species in the inlet tothe Taihu Lake. The changes of silver concentrations in the waters have caused the differences of species composition, dominant species and biomass. Correlation between species amount, biomass and silver concentration appears negative. Moina macrocopa, Diaphanosoma leuch-tenbegianum, Thermocyclops taihokuensis, Mesocyclops leu-ckri are considered to be the dominant species. According to the analysis of samples collected up Moina macrocopa in the vvastewater, its silver content is 101.5 ppm(DM). When the wastewater was purified with water hyacinth, zooplankton species, amounts and biomass would have an apparent change. Their order is as follows: on water hyacinth root> in wastewater below below the hyacinth> in wastewater without the hyacinth.