蔡富才;赵欢;李艳楠;张文龙;杨大佐;周一兵;

• 1:大连海洋大学辽宁省海洋生物资源恢复与生境修复重点实验室

摘要(Abstract)：

为近海岸沉积质中PAHs的生态风险评价及其污染生境的修复提供理论依据,以双齿围沙蚕为研究对象,以芘为暴露污染物,开展双齿围沙蚕对芘的生物可利用性研究,分别考察了芘对双齿围沙蚕抗氧化酶活性的影响以及芘在双齿围沙蚕体内的生物富集特征。结果表明,双齿围沙蚕SOD、CAT和GSH-PX活性均随诱导时间的增加而升高,且SOD活性随芘浓度的增加出现显著性抑制,CAT和GSH-PX活性则随芘浓度的增加出现显著性升高。芘在双齿围沙蚕体内的生物富集特征如下:双齿围沙蚕体内芘的蓄积量随暴露浓度的增加而增加,各处理组双齿围沙蚕体内芘的蓄积量随时间的变化均呈类凸形的二次曲线关系,在第10天达到蓄积的最大值,最大蓄积量依次为(6.18±0.62)mg·kg~(-1)、(12.37±1.23)mg·kg~(-1)和(24.76±1.51)mg·kg~(-1)。生物富集系数BCF随芘浓度的增加而减小,分别为0.0692、0.0684和0.0674。上述研究结果表明,在一定浓度范围内,双齿围沙蚕抗氧化酶活性对芘的暴露具有很好的指示作用;此外,在短期内,双齿围沙蚕对芘具有明显的富集效应。

关键词(KeyWords)： 芘;双齿围沙蚕;生物可利用性;抗氧化酶;生物富集

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(41306138);; 海洋公益性行业专项(201305002,201305043);; 辽宁省教育厅一般项目(L201608)

作者(Author): 蔡富才;赵欢;李艳楠;张文龙;杨大佐;周一兵;

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