State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
Environ Monit Assess. 2011 Aug;179(1-4):431-42. doi: 10.1007/s10661-010-1746-3. Epub 2010 Oct 27.
The concentrations of Cu, Pb, Zn, Cd, and Ni were measured in surface and core sediments to determine their distribution characteristics and toxicity in the sediments of Lake Chaohu. The results revealed that metal concentrations in the surface sediments had a tendency to increase from the estuarine mouth to the lake center. The distribution characteristics of the five target metals were similar along the sediment profiles at each site. Principal component analysis revealed that all of the measured variables were loaded in the same component, indicating that there was a strong relationship among these measured variables, which was confirmed by the correlation analysis. Two sets of sediment quality guidelines (SQGs): simultaneously extracted metal (SEM) and acid volatile sulfides (AVS) models (including ∑SEM/AVS, ∑SEM-AVS, and ∑SEM-AVS/ f (oc)) and threshold effect level and probable effect level values were used to predict the sediment toxicity. Comparison of the results obtained using these two sets of SQGs revealed that only a small portion of the entire set was identical, while the majority of the results were different and sometimes completely contradictory. These contradictory results would cause a great deal of trouble for environment managers. More accurate and universal SQGs must be developed for environmental researchers and local environmental managers and regulators.
采用同步提取金属（SEM）和酸可挥发性硫化物（AVS）模型（包括∑SEM/AVS、∑SEM-AVS 和∑SEM-AVS/ f（oc））以及阈效应浓度和潜在效应浓度值，对表层和柱状沉积物中的 Cu、Pb、Zn、Cd 和 Ni 浓度进行了测量，以确定其在巢湖沉积物中的分布特征和毒性。结果表明，从河口到湖中心，表层沉积物中的金属浓度有增加的趋势。五个目标金属在每个站位的沉积物剖面上的分布特征相似。主成分分析表明，所有测量变量都加载在同一分量中，表明这些测量变量之间存在很强的关系，这也得到了相关性分析的证实。采用两套沉积物质量基准（SQGs）：同步提取金属（SEM）和酸可挥发性硫化物（AVS）模型（包括∑SEM/AVS、∑SEM-AVS 和∑SEM-AVS/ f（oc））以及阈效应浓度和潜在效应浓度值，对沉积物毒性进行了预测。对这两套 SQGs 得出的结果进行比较后发现，仅有一小部分结果是相同的，而大部分结果是不同的，有时甚至是完全相反的。这些相互矛盾的结果会给环境管理者带来很大的麻烦。为了环境研究人员和当地环境管理者和监管机构的利益，必须开发出更准确和通用的 SQGs。
