5种酚类化合物对3种水生生物的毒性作用
THE TOXIC EFFECTS OF FIVE PHENOL COMPOUNDS TO THREE DIFFERENT AQUATIC ORGANISMS
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摘要: 通过测定藻细胞密度和溞数量的变化,研究了5种酚类化合物对蛋白核小球藻 (Chlorella pyrenoidosa)、斜生栅藻 (Scenedesmus obliquus)和多刺裸腹溞 (Moina macrocopa) 3种水生生物的影响.结果表明,在实验第6天,随酚类化合物浓度增加,藻细胞密度与对照组相比明显下降,多刺裸腹溞48 h死亡率增高,呈现剂量-效应关系.对苯二酚、间苯二酚、2,4-二氯酚、2,4-二硝基酚和2,4,6-三硝基酚5种酚类化合物在第6天对蛋白核小球藻的半抑制效应浓度(ErC50)值依次为:7.73 、25.21、33.19、38.51和25.08 mg·L-1;对斜生栅藻依次为:9.13、30.28、40.77、48.09和16.09 mg·L-1;在48 h,对苯二酚、间苯二酚、2,4-二氯苯酚、2,4-二硝基酚和2,4,6-三硝基酚对多次裸腹溞的半致死效应浓度(LC50)值分别为:1.92、10.75、15.53、15.68 和9.87mg·L-1.5种酚类化合物对3种水生生物的毒性研究表明,对苯二酚的毒性最强,2,4-二硝基酚的毒性最弱.Abstract: Based on the measurement of algae cell density and daphnia quantity, the inhibitory activities of five phenol compounds against three different aquatic organisms, i.e. Chlorella pyrenoidosa Chick, Scenedesmus obliquus and Moina macrocopa were tested. The results showed that the algal cell density was reduced significantly on the sixth day and the quantity of Moina macrocopa decreased sharply in 24 h with increasing phenol concentration, exhibiting a good concentration-effect relationship. On the sixth day, ErC50 of hydroquinone, resorcinol, 2,4-dichlorophenol, 2,4-dinitrophenol and 2,4,6-nitro-phenol on Chlorella pyrenoidosa were 7.73,25.21,33.19,38.51 and 25.08 mg·L-1 respectively, and those on Scenedesmus obliquus were 9.13,30.28,40.77,48.09 and 16.09 mg·L-1 respectively. The 48 h LC50 of hydroquinone, resorcinol, 2,4-dichlorophenol, 2,4-dinitrophenol, and 2,4,6-nitro-phenol on Moina macrocopa were 1.92, 10.75, 15.53, 15.68 and 9.87mg·L-1 respectively. The results showed that hydroquinone had the strongest toxicity while 2,4-dinitrophenol had the weakest toxicity in the five phenol compounds.
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Key words:
- aquatic organisms /
- phenol compounds /
- acute toxicity
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