CAJ | 학술논문

以大型溞为模式生物,研究了自然光照(光暗比为12 h:12 h)和黑暗条件下纳米ZnO对水生生物的急性毒性效应.实验结果表明,在自然光照条件下,不同粒径纳米ZnO对大型溞的毒性顺序为(25±5)和(10±1)>(90±10)nm,其EC50分别为12.21,9.96和167.36 mg/L;黑暗条件下,(10±1),(25±5)和(90±10)am ZnO时大型溞抑制的EC50分别为19.64,206.70和409.84 mg/L.由此可以看出,纳米ZnO在光照条件下对大型溞的影响大于黑暗条件,且粒径大小影响其毒性强弱.
이대형소위모식생물,연구료자연광조(광암비위12 h:12 h)화흑암조건하납미ZnO대수생생물적급성독성효응.실험결과표명,재자연광조조건하,불동립경납미ZnO대대형소적독성순서위(25±5)화(10±1)>(90±10)nm,기EC50분별위12.21,9.96화167.36 mg/L;흑암조건하,(10±1),(25±5)화(90±10)am ZnO시대형소억제적EC50분별위19.64,206.70화409.84 mg/L.유차가이간출,납미ZnO재광조조건하대대형소적영향대우흑암조건,차립경대소영향기독성강약.
The ecotoxieity of nanoscale ZnO water suspensions for Daphnia magna was used as the testing organisms under both conditions of natural light and darkness was examined using a method developed based on the standard OECD guide-lines for the testing of chemicals (i. e. OECD 201,202). The results showed that different nanoscale ZnO exhibited differ-ent toxieities to the testing organisms. The EC50 of (10±1), (25±5) and (90±10) nm ZnO were 12.21, 9.96 and 167.36 mg/L in 48 hours under the natural light, respectively. Based on the results, their toxicity ranked as (25 ± 5),(10±1)>(904±10) nm. The EC50 of (10±1), (25±5) and (90±10) nm ZnO were 19.64,206. 70 and 409. 84 mg/L in 48 hours under the darkness, respectively. The toxicity results indicated that nanoscale ZnO was more danger to daphnia magna in natural light than that of in darkness, and the toxicity was affected by nanopartiele size.