一致性沉积物质量基准(CBSQGs)及其在近海沉积物环境质量评价中的应用

CONSENSUS-BASED SEDIMENT QUALITY GUIDELINES(CBSQGs) AND ITS APPLICATION IN COASTAL SEDIMENT QUALITY ASSESSMENT

基于结合几种单个沉积物质量基准的一致性沉积物质量基准(Consensus-Based Sediment Quality Guidelines,CBSQGs),以毒性效应预测准确度高、普适性强等优点近几年来逐渐发展成为主要的沉积物质量评价工具之一.本文阐述了CBSQGs的构建原理,分析了其评价结果的可靠性以及方法的优劣.CBSQGs通过对几种具有相似评价目标的单个基准值取几何平均来获得各种致污物的化学浓度生物效应值,并以此预测沉积物毒性.样品毒性检验结果表明CBSQGs能够可靠地预测样品生物毒性效应的缺失.对于沉积物样品,还可以通过计算平均可能效应浓度商数(mean PEC Quotients,mPECQ)评估CBSQGs的毒性预测能力.同时,本文还针对CBSQGs在世界不同海域的应用情况与存在的不足,提出了相关改进建议,以期为我国近海沉积物环境质量评价方法的研究提供借鉴.

Consensus-based sediment quality guidelines （CBSQGs）, as one of the major evaluation tools in sediment quality assessment, has been extensively used for reliable prediction as well as easy application. This paper reviewed CBSQGs＇s derivation process, advantages, limitations and reliability analysis. CBSQGs concentrate on the reconcilement of a variety of single SQGs by determining the geometric mean of selected SQGs, which have the similar assessment purpose. Sediment toxicity test results demonstrated that CBSQGs have reliable prediction ability. For each sediment sample, a mean probable effect concentration quotient （mPECQ） was also calculated to enhance CBSQGs＇ predictive ability in combination with toxicity classification, mPECQ can be used to assess sediment pollution magnitude as well. Moreover, applications in coastal ecosystems in recent years were also summarized, and relevant recommendations were proposed for further study of sediment quality assessment in China.