应用平衡分配模型评价渤海湾和莱州湾沉积物重金属潜在生物毒性

李力; 王小静; 白亚之; 孙翌; 刘季花

doi:10.3969/j.issn.0253-4193.2015.02.008

应用平衡分配模型评价渤海湾和莱州湾沉积物重金属潜在生物毒性

doi: 10.3969/j.issn.0253-4193.2015.02.008

1.
国家海洋局第一海洋研究所, 山东青岛 266061
2.
青岛市城市排水监测站, 山东青岛 266002

基金项目: 国家海洋局第一海洋研究所基本科研业务专项资金项目(GY2011T09,GY2014G28);海洋公益性行业专项经费资助项目(201105003).

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出版历程
- 收稿日期: 2014-04-22
- 修回日期: 2014-10-29

Application of equilibrium partitioning model to assess the metal toxicity in sediments of Bohai Bay and Laizhou Bay

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061
2.
Qingdao City Sewage Monitoring Station, Qingdao 266002, China

摘要

摘要: 为探讨渤海沉积物中重金属的生物毒性,采集了渤海湾和莱州湾共72个站点的表层沉积物,测定了酸可挥发性硫化物(AVS)、同步萃取金属(SEM)、有机碳(TOC)等参数,应用平衡分配模型(EqP Model)评价了沉积物中重金属的潜在生物毒性.研究显示,有8个站点超过了EqP Model的毒性阈值,显示潜在生物毒性,而61%的站点应无生物毒性.本研究同时测定了沉积物的总含量,应用几种常用的沉积物质量基准进行了评价虽然有部分站点的Cu、Ni、Cr超过了基准值,但与渤海的背景值比较,这些基准值可能并不适用于评价渤海沉积物.研究显示,EqP Model可以更有效的评价沉积物中重金属的活性和生物毒性,尤其针对我国近岸海域的沉积物,TOC和AVS含量偏低而重金属生物毒性偏高的情况可能普遍存在,更应积极考虑应用EqP Model进行重金属生物毒性的评价.
- 酸可挥发性硫化物 /
- 平衡分配模型 /
- 重金属 /
- 生物毒性 /
- 渤海湾 /
- 莱州湾
Abstract: In order to assess the metal toxicity in sediments in Bohai Sea, seventy-two surface sediment samples have been collected in Bohai Bay and Laizhou Bay. The acid volatile sulfide (AVS), simultaneously extracted metals (SEM) and total organic carbon (TOC) were determined, and the equilibrium partitioning model (EqP Mode) were applied to assess the sediment toxicity. The results showed that, eight stations have exceeded the toxicity threshold of the EqP Model, indicating potential metal toxicity in sediments, while 61% stations were in absence of toxicity. Meanwhile, the total (bulk) metal content has also been determined and several empirical sediment quality guidelines (SQGs) were applied to assess the quality of the sediments. Although the Cu, Ni and Cr concentrations at some stations exceeded the SQGs, the SQGs, however, may not be suitable for use in the Bohai Sea owing to the background concentrations. In the end, it is concluded that the EqP Model is a more effective method to assess the metal bioavailability and toxicity in sediments, especially for the Chinese nearshore sediments, which may contain relatively low TOC and AVS concentrations and therefore result higher metal toxicity. The EqP Model should be paid more attention and applied more often to assess the sediment metal toxicity in China.
- acid volatile sulfide /
- equilibrium partitioning model /
- heavy metals /
- toxicity /
- Bohai Bay /
- Laizhou Bay

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