PDF(Pubmed)
Abstract：
The historical sedimentary and evolutionary characteristics of persistent organic pollutants and endocrine disruptors in typical regions of the Three Gorges Reservoir are scarcely studied. Herein, the 96-year data on contaminated sediment history were reconstructed using Caesium 137 isotope dating. Polychlorinated biphenyl concentrations in the involved sediment cores ranged from non-detected (ND) to 11.39 ng/g. The concentrations of polycyclic aromatic hydrocarbons ranged from ND to 2075.20 ng/g and peaked in the 1970s owing to natural, agricultural and human activities. Further, phthalate esters (PAEs) and heavy metals (HMs) were detected at concentrations ranging from ND to 589.2 ng/g and 12.10-93.67 μg/g, respectively, with highest values recorded in the 1980s owing to rapid industrialisation and insufficient management during China\'s early reform and development stages. PAE and HM concentrations have increased in recent years, suggesting the need to focus on industrial and agricultural activities that have caused this impact. Although current pollutant concentrations in sediments do not pose a risk to the aquatic ecosystem, they should be continuously monitored.
摘要：
三峡水库典型地区持久性有机污染物和内分泌干扰物的历史沉积和演化特征研究很少。在这里，使用铯137同位素测年重建了96年的受污染沉积物历史数据。所涉及的沉积物核心中的多氯联苯浓度范围从未检测到（ND）到11.39ng/g。多环芳烃的浓度范围从ND到2075.20ng/g，并在1970年代达到峰值，农业和人类活动。Further,邻苯二甲酸酯（PAEs）和重金属（HMs）的检测浓度范围从ND到589.2ng/g和12.10-93.67μg/g，分别,由于快速工业化和中国早期改革和发展阶段的管理不足，记录在20世纪80年代的最高值。PAE和HM浓度近年来有所增加，这表明需要关注造成这种影响的工业和农业活动。尽管目前沉积物中的污染物浓度不会对水生生态系统构成风险，他们应该被持续监控。
