摘要
8种浮选药剂对大型溞的48小时LC_(50)值在2.40—102.30毫克/升之间。它们的毒性顺序为:MPA>2号油>Fu>0145>Yx>S808>甘苄油>10号油。浮选药剂0145对大型溞21天慢性毒性试验结果:NOEC为2毫克/升,LOEC为3毫克/升,其应用因子在0.15—0.22之间。磷矿选矿厂废水毒性甚低。磷矿选矿过程中加入的4种选矿药剂其毒性单位分别为:S808 50.00,亚硫酸化皂26.67,Na_2CO_3 6.66,Na_2SiO_3 0.35。文中提出化学物按溞类48小时LC_(50)值(mg/L)毒性分级建议基准:剧毒<0.1,高毒0.1—1,中等毒1—10,低毒10—100,微毒或无毒>100。
The purpose of this study is to evaluate the effects of mineral floatation reagents on Daphnia. The toxicity of eight kinds of floatation reagent was studied under renewed static conditions at 25±1℃. The 48hr LC_(50) of floatation reagents for 12±12h old Daphnia magna Straus was estimated to be between 2.40 and 102.30 mg/L. The acute toxicites are in the order of MPA>No.2 oil>Fu>0145>Yx>S808>Ganbian oil>No. 10 oil. Chronic No-Observed Effect Concentration (NOEC) of mineral floatation reagent 0145 was 2 mg/L and Lowest-Observed-Effects Concentration (LOEC) was 3 mg/L. The application factors were within the range of 0.15-0.22. The test of toxicity of phosphoromineral dressing effluent to Daphnia carinata King indicates that the toxicity is low. The iso-toxic units of four mineral dressing reagents were calculated to be 50.00 for S808, 26.67 for sulfitating soap, 6.66 for Na_2CO_3 and 0.35 for Na_2SiO_3, respectively. A classification of the toxicity of chemicals to Daphnia is proposed as: very high, <0.1 (×48 LC_(50)); high, 0.1-1; moderate, 1-10; low, 10-100; slight or non-toxic,>100.
出处
《水生生物学报》
CAS
CSCD
北大核心
1989年第3期240-249,共10页
Acta Hydrobiologica Sinica
关键词
zhao类
浮选药剂
毒性
Daphnia magna, Daphnia carinata, acute toxicity, chronic toxicity, mineral floatation reagent
