State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
Environ Sci Process Impacts. 2015 Jun;17(6):1150-6. doi: 10.1039/c5em00025d. Epub 2015 May 13.
Seasonal distribution of organochlorine pesticides (OCPs) and polycyclic aromatic hydrocarbons (PAHs) and their possible interactions with phytoplankton species in water from Lake Taihu were investigated. OCP concentrations ranged from 69.95 to 223.08 ng L(-1) in winter and from 80.95 to 376.03 ng L(-1) in summer, while PAHs ranged from 45.40 to 232.74 ng L(-1) in winter and 49.53 to 197.72 ng L(-1) in summer. Such physicochemical and biological parameters as the larger amounts of pollutants taken up by phytoplankton, the increased atmospheric wet deposition, the discharge of wastewater, and the resuspension of polluted sediments in summer time were responsible for the higher residues of both OCPs and PAHs than in winter. Canonical correspondence analysis (CCA) between phytoplankton biomass and micropollutants indicated high affinity of OCPs to Bacillariophyta and Cryptophyta and PAHs to Cyanophyta and Chlorophyta, documenting the ecological effects of phytoplankton on the biogeochemical processes of OCPs and PAHs and thus should be further investigated especially in hyper-eutrophic lakes.
研究了太湖水中有机氯农药 (OCPs) 和多环芳烃 (PAHs) 的季节分布及其与浮游植物物种的可能相互作用。冬季 OCPs 浓度范围为 69.95 至 223.08 ng/L，夏季浓度范围为 80.95 至 376.03 ng/L；冬季 PAHs 浓度范围为 45.40 至 232.74 ng/L，夏季浓度范围为 49.53 至 197.72 ng/L。夏季浮游植物吸收更多污染物、大气湿沉降增加、废水排放以及污染沉积物再悬浮等理化和生物学参数是导致 OCPs 和 PAHs 残留量高于冬季的原因。浮游植物生物量与微污染物之间的典范对应分析 (CCA) 表明，OCPs 与硅藻和甲藻具有高亲和力，而 PAHs 与蓝藻和绿藻具有高亲和力，这证明了浮游植物对 OCPs 和 PAHs 生物地球化学过程的生态影响，因此应进一步研究，尤其是在富营养化湖泊中。
