Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, Harbin, 150025, People's Republic of China.
Ecotoxicology. 2011 Jul;20(5):951-8. doi: 10.1007/s10646-011-0679-0. Epub 2011 May 4.
Polycyclic aromatic hydrocarbons (PAHs) in a sediment core from the north Lianhuan Lake were collected to investigate its historical changes in the last one hundred years and its possible influence on ecological system in the lake. GC-MS was used to determine the concentrations of PAHs, and sediment chronological age was examined by (137)Cs dating approach. The concentrations of 16 different kinds of PAHs in the sediment samples ranged from 297 to 1,327 ng g(-1), and the low molecular weight (LMW) were predominant. The intensification of industrial and anthropogenic activities in the Daqing oil field may play the key role in the increase of PAHs concentrations in the late 1950s. To the early 1980s, the PAHs concentrations significantly decreased due to the grain size coarsening in the sediment samples, which was confirmed by the precipitation information. The 5-6 rings PAHs concentrations increased in the early 1980s may be attributed to the consumption of petroleum, coal and wood. The results showed that both the PAHs historical record and current concentrations may cause some influence on the Lianhuan Lake ecological system. The toxicology research on this ecological system should be done in the further investigations for determining the PAHs damage on human and ecological system health.
多环芳烃（PAHs）在来自连湖湖北部的沉积物岩心中被采集，以研究其在过去一百年中的历史变化及其对湖泊生态系统的可能影响。GC-MS 用于确定 PAHs 的浓度，并且通过（137）Cs 测年方法检查沉积物的年代。在沉积物样品中，16 种不同类型的 PAHs 的浓度范围从 297 到 1327ng g(-1)，并且低分子量（LMW）是主要的。大庆油田工业和人为活动的加剧可能在 20 世纪 50 年代末 PAHs 浓度增加中起关键作用。到 20 世纪 80 年代初，由于沉积物样品中粒径变粗，PAHs 浓度显著降低，这一点得到了降水信息的证实。20 世纪 80 年代初 5-6 环 PAHs 浓度的增加可能归因于石油、煤炭和木材的消耗。结果表明，PAHs 的历史记录和当前浓度都可能对连湖生态系统造成一些影响。在进一步的调查中，应该对这个生态系统进行毒理学研究，以确定 PAHs 对人类和生态系统健康的损害。
