Environmental Research Center, Department of Chemistry, State University of New York at Oswego, Oswego, NY, 13126, USA.
Environmental Research Center, Department of Chemistry, State University of New York at Oswego, Oswego, NY, 13126, USA.
Environ Res. 2020 May;184:109329. doi: 10.1016/j.envres.2020.109329. Epub 2020 Mar 4.
Our study is the first comprehensive, multi-year assessment of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), organochlorine pesticides (OCPs), polychlorinated naphthalenes (PCNs), polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans (PCDD/Fs) lake trout concentrations and trends in Lake Champlain (LC). Lake trout whole-fish, fillets, and eggs were collected over the 2012-2018 study period. Total PCB concentrations (395.7 ng/g wet weight (ww)) were the highest average concentration of any contaminant grouping reported in this study. Whole-fish lake trout modeling revealed highly significant (p < 0.05) log-linear correlations for all dioxin-like contaminants measured. Overall contaminant decreases for the 2012-2018 period ranged from 20.9% (total PCNs) to 39.3% (2378-TCDD). Contaminant decreases for total PCBs and total-5-PBDEs were 30.9% and 48.3%, respectively. Of particular significance were the measured total PBDE concentrations (74.3 ng/g ww) found in LC whole-fish lake trout. Log-linear forecasting indicates that whole-fish lake trout TEQs will be below the guidelines protective of wildlife thresholds during the periods 2035-2047 (TRG) and 2062-2088 (TRG). Based on current USEPA guidelines, all lake trout fillets from Lake Champlain analyzed for this study exceed the human health cancer screening value of 0.15 pg-TEQ/g ww by a substantial margin (average = 8.61 pg-TEQ/g ww). Dioxin-like trend data collected for Lake Champlain indicates that the mechanisms of contaminant uptake, trends, and yearly percent decline reflect those found in the Great Lakes.
我们的研究首次全面、多年评估了多氯联苯 (PCBs)、多溴二苯醚 (PBDEs)、有机氯农药 (OCPs)、氯化萘 (PCNs)、二恶英和呋喃 (PCDD/Fs)在尚普兰湖 (LC) 中的鲱鱼浓度和趋势。在 2012-2018 年的研究期间，采集了鲱鱼全鱼、鱼片和鱼卵。总 PCB 浓度（395.7ng/g 湿重（ww））是本研究报告的任何污染物组别的最高平均浓度。全鱼鲱鱼模型显示，所有测量的类似二恶英污染物均呈高度显著（p<0.05）对数线性相关。2012-2018 年期间，总体污染物减少幅度从总 PCNs 的 20.9%到 2378-TCDD 的 39.3%不等。总 PCBs 和总-5-PBDEs 的减少幅度分别为 30.9%和 48.3%。特别值得注意的是，在 LC 全鱼鲱鱼中测量到的总 PBDE 浓度（74.3ng/g ww）。对数线性预测表明，在 2035-2047 年（TRG）和 2062-2088 年（TRG）期间，全鱼鲱鱼 TEQs 将低于保护野生动物的指南阈值。根据美国环保署目前的指南，对本研究中分析的尚普兰湖所有鱼片进行分析，超过了人类健康癌症筛查值 0.15pg-TEQ/g ww 的很大幅度（平均值=8.61pg-TEQ/g ww）。为尚普兰湖收集的类似二恶英趋势数据表明，污染物吸收、趋势和每年的百分比下降机制反映了在大湖地区发现的机制。
