环糊精及其衍生物对降低铅和菲的藻类毒性研究  

Effects of cyclodextrin and its derivatives on decreasing toxicity of Pb and phenanthrene to algae

作　　者：徐兰[1] 李青[1] 章绍康 王光辉[1] 

机构地区：[1]东华理工大学水资源与环境工程学院,江西南昌330013

出　　处：《环境污染与防治》2016年第9期68-72,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41261078;No.40861017);江西省自然科学基金资助项目(No.20114BAB203029);江西省教育厅科技项目(No.GJJ12374);江西省研究生创新专项(No.YC2014-S334)

摘　　要：研究了环糊精(CD)及其衍生物对重金属铅和有机物菲及其复合污染胁迫下斜生栅藻(Scenedesmus obliquus)的毒性影响。结果表明,天冬氨酸-β-CD(ACD)具有促进斜生栅藻生长的作用。在单一铅或菲胁迫下,低浓度时能促进斜生栅藻的生长作用,但当铅质量浓度≥0.10mg/L或菲质量浓度≥10μg/L时,斜生栅藻的生长都受到了不同程度的抑制。100 mg/L的ACD加入后,在相同浓度的铅或菲胁迫下,斜生栅藻抑制率明显降低。其中,铅对斜生栅藻96h的半数效应浓度(EC50)由0.96mg/L增加到了3.79mg/L,菲对斜生栅藻96h的EC50由40μg/L增加到了104μg/L,毒性明显降低。复合污染时,铅和菲对斜生栅藻的毒性表现出协同作用。不同CD(α-CD、β-CD和γ-CD)及其衍生物(ACD和羟丙基-β-CD)中,对降低斜生栅藻毒性效果最好的为ACD。The effects of cyclodextrin(CD)and its derivatives on decreasing toxicity of Pb,phenanthrene and their combined pollution to Scenedesmus obliquus were studied.Results showed that aspartate-β-CD(ACD)had effect to promote the growing of Scenedesmus obliquus.Stressed by Pb or phenanthrene,the growth of Scenedesmus obliquus was promoted with low concentrations,but restrained with Pb mass concentration over 0.10mg/L or phenanthrene mass concentration over 10μg/L.When 100mg/L ACD was added,the inhibition rate of Scenedesmus obliquus decreased obviously under the same concentrations of Pb or phenanthrene.The 96 hhalf effect concentraion(EC50)of Pb increased from 0.96mg/L to 3.79mg/L,and the 96hEC50 of phenanthrene increased from 40μg/L to 104μg/L.Under the condition of combined pollution,the toxicity of Pb and phenanthrene showed a synergistic effect.The effect of ACD on decreasing toxicity was the best among different CD(α-CD,β-CD andγ-CD)and its derivatives(ACD and hydroxypropyl-β-CD).

关 键 词：斜生栅藻 铅 菲 毒性效应 环糊精 

分 类 号：X171.5[环境科学与工程—环境科学] X592