磷矿浮选剂S-808及其尾矿水对鱼类和胚胎的毒性

S-808是我国选矿科技工作者研制的一种新型磷矿浮选剂。湖北省荆襄磷矿矿务局王集矿,在选矿过程中采用S-808作为抑制剂直接浮选中低品位钙质磷块岩,获得特殊的选矿效果。为此化工部矿山局委托我们开展磷矿浮选剂S-808对鱼类的毒性和毒理学的研究。

Toxicity of Floatation Agent S-808 of Phosph-atie Ore and Mineral Wastewater to Fishes and Embryos

Toxic test determining larvae of grass carp and guppy for 96-hour LC₅₀ was 18 mg/L and 35 mg/L respectively, 10-day LC₅₀ of grass carp embryo was 3.69 mg/L. For fish embryos in 1 mg/L, there appeared deformation. Deformation percentage and concentration were of positive correlation. In fish toxic test, deformed index was more sensitive than dead index. The toxic test showed that, according to classfication standard, S-808 was a "poisonous grade" of fish toxicity. S-808 in floating process was treated with physiochemical method and toxicity of dressing mineral wastewater decreased, to the value of LC₅₀ in the test could not be determined, and there didn't appear deformation of fishes.