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腐植酸对四溴双酚A在金鱼藻体内的富集及氧化胁迫的影响

Keywords: 四溴双酚A,腐植酸,金鱼藻,生物富集,氧化胁迫

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Abstract:

通过室内静态模拟实验,研究了在不同浓度的腐植酸(Humicacid,HA)条件下,四溴双酚A(tetrabromobisphenolA,TBBPA)在金鱼藻中的生物富集及对金鱼藻氧化胁迫的影响。结果表明,HA的存在降低了TBBPA在金鱼藻中的富集;低浓度HA及0.5mg·L-1TBBPA共存条件下,金鱼藻组织中自由基强度、还原型谷胱甘肽(GSH)含量以及超氧化物歧化酶(SOD)活性均恢复到对照水平;加入高浓度的HA及0.5mg·L-1TBBPA,金鱼藻组织中自由基强度显著增加,GSH含量受到抑制,SOD活性受到显著诱导;氧化型谷胱甘肽含量没有显著差异。考虑TBBPA的生物有效性和生态毒性时,不能忽视环境因子如HA的影响。

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