Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China.
Environ Sci Pollut Res Int. 2017 Dec;24(34):26574-26585. doi: 10.1007/s11356-017-0272-z. Epub 2017 Sep 26.
A study on the characteristics of heavy metals in surface sediments of typical reservoirs in the hilly area of southern China was carried out. The results showed that contents of heavy metals had great temporal and spatial heterogeneity among studied reservoirs. Zn, Pb, and As presented significant enrichment ratio in reservoirs of Dou Shui (DS) and Feng Tang (FT), as well as Ti in reservoirs of DZ and GT. The content of Cd in reservoir of FT reservoirs was characterized with high health risk with the significantly highest value of 52.43 mg/kg. Furthermore, Pb was identified with high health risk in reservoirs of SFM, Ouyang Hai (OYH), FT, and DS, and As was in OYH and ZX. Multivariate statistical analysis suggested high consistency in the variations of Cr, Ni, and Cu; moreover, Cd, Zn, and Pb were characterized with great homogeneity in their sources. In addition, agricultural activities might exert less effect on variations of heavy metals in studied reservoirs, considered that there was a weak relationship between heavy metals and nutrients. These results could improve our understanding of the spatial variations of heavy metals and their potential sources in reservoirs in this ecologically fragile region.
对中国南方丘陵区典型水库表层沉积物中重金属特征进行了研究。结果表明，研究水库中的重金属含量在时间和空间上存在很大的异质性。Zn、Pb 和 As 在 Dou Shui (DS) 和 Feng Tang (FT) 水库中表现出明显的富集率，而 Ti 在 DZ 和 GT 水库中也有表现。FT 水库中 Cd 的含量具有很高的健康风险，其含量高达 52.43mg/kg。此外，Pb 在 SFM、Ouyang Hai (OYH)、FT 和 DS 水库中被认为具有高健康风险，而 As 在 OYH 和 ZX 水库中也有表现。多元统计分析表明，Cr、Ni 和 Cu 的变化具有高度一致性；此外，Cd、Zn 和 Pb 的来源具有很大的同质性。此外，考虑到重金属与营养物质之间的关系较弱，农业活动对研究水库中重金属的变化影响可能较小。这些结果可以提高我们对生态脆弱地区水库中重金属空间变化及其潜在来源的认识。
