| 海洋沉积物中Zn对底栖端足类生物的毒性 |
| 摘要点击 2447 全文点击 2119 投稿时间：2003-01-23 修订日期：2003-05-18 |
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| 中文关键词 Grandidierella japonica 生物毒性 Zn 酸溶挥发性硫化物 同步提取金属 沉积物 |
| 英文关键词 Grandidierella japonica biotoxicity zinc acid-volatile sulfide simultaneously extracted metals sediments |
| 作者 | 单位 | | 韩建波 | 国家海洋环境监测中心,大连,116023 | | 马德毅 | 国家海洋环境监测中心,大连,116023 | | 闫启仑 | 国家海洋环境监测中心,大连,116023 | | 王菊英 | 国家海洋环境监测中心,大连,116023 | | 许道艳 | 国家海洋环境监测中心,大连,116023 | | 陈淑梅 | 国家海洋环境监测中心,大连,116023 | | 陈红星 | 国家海洋环境监测中心,大连,116023 | | 阎吉成 | 国家海洋环境监测中心,大连,116023 |
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| 中文摘要 |
| 通过分析Zn加标沉积物中酸溶挥发性硫化物与同步提取金属的摩尔浓度差值解释Zn对底栖生物的毒性作用,受试生物种选择端足类底栖生物日本大螯蜚(Grandidierella japonica),使用实验室沉积物10-day急性毒性生物检验方法进行检验分析结果表明,当酸溶挥发性硫化物与同步提取金属的差值＜0μmol/g干重时,Zn在沉积物间隙水中的浓度非常低,而且在生物急性毒性试验中也很少发现生物致死的现象相反,当二者的差值＞0μmol/g时,Zn在沉积物间隙水中的浓度则明显升高,而且在生物急性毒性试验中受试生物致死率迅速增加.本研究通过将化学数据与生物短期暴露的观察结果相比较,支持了使用酸溶挥发性硫化物作为归一化因子预测金属沾污沉积物毒性的方法. |
| 英文摘要 |
| The utility of simultaneously extracted metals/acid-volatile sulfide (SEM-AVS) differences was investigated to explain the biological toxicity of zinc in the sediments to benthic organisms exposed in the laboratory to sediments. Amphipod Grandidierella japonica was selected to 10-day acute toxicity test for this purpose. The investigation results showed that when the molar difference between SEMZn} and AVS (i.e., SEMZn}-AVS) was <0μmol/g, the concentration of zinc in the sediment interstitial water was low and few toxic effects were observed. Conversely, when SEMZn}-AVS exceeded 0μmol/g, a dose-dependent increase in the relative concentration of zinc in the pore water was detected and apparent organisms toxic effects were observed. Together, the chemical data from this study compare with observations made in short-term exposures and thus support the use of AVS as a normalization phase for predicting toxicity in metal-contaminated sediments. |
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