Fang Ting, Lu Wenxuan, Li Jing, Zhao Xiuxia, Yang Kun
Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, China.
Environ Sci Pollut Res Int. 2017 Jun;24(18):15390-15400. doi: 10.1007/s11356-017-9053-y. Epub 2017 May 15.
Chaohu Lake is the fifth largest freshwater lake in China, which tolerates substantial amount of anthropogenic discharge from surrounding cities that resulting in the degradation of water and damage of aquatic ecosystem. Metal analysis of sediment and aquatic organisms can provide important information on the environmental contamination and potential impact of aquatic food consumption. Thus, the concentrations of Cu, Pb, Zn, Cr, Cd, As, and Hg in sediment and fish from Chaohu Lake were analyzed with inductively coupled plasma mass spectrometry and atomic fluorescence spectrometry. The mean content of Cu, Pb, Zn, Cr, Cd, As, and Hg in the sediment samples were 27.4 ± 6.3, 40.5 ± 12.3, 136.8 ± 65.5, 68.5 ± 9.1, 0.357 ± 0.141, 10.8 ± 1.7, and 0.117 ± 0.049 mg/kg, respectively. The results were compared with background values and evaluation methods, to characterize the potential ecological risk. The concentrations of Cu, Pb, Zn, Cr, Cd, As, and Hg in the fish muscle samples were 1.68-5.31, 0.078-0.31, 15.55-372.98, 0.31-0.93, 0.001-0.033, 0.29-1.03, and 0.04-0.197 mg kg of dry mass, respectively. Most of the concentrations of the studied metals in muscles were found to be below the safe limits; however, the concentration of inorganic As (10% of total As) in two specimens exceeded the maximum allowance in fish. The ecological risk evaluation showed that the metals in sediment posed low to medium risk. The health risk assessment suggested that the consumption of fish from Chaohu Lake is currently safe with respect to the metals.
巢湖是中国第五大淡水湖，承受着来自周边城市大量的人为排放，导致水质恶化和水生生态系统受损。对沉积物和水生生物进行金属分析可以提供有关环境污染以及食用水生食物潜在影响的重要信息。因此，采用电感耦合等离子体质谱法和原子荧光光谱法分析了巢湖沉积物和鱼类中铜、铅、锌、铬、镉、砷和汞的含量。沉积物样品中铜、铅、锌、铬、镉、砷和汞的平均含量分别为27.4±6.3、40.5±12.3、136.8±65.5、68.5±9.1、0.357±0.141、10.8±1.7和0.117±0.049毫克/千克。将结果与背景值和评估方法进行比较，以表征潜在的生态风险。鱼肉样品中铜、铅、锌、铬、镉、砷和汞的含量分别为1.68 - 5.31、0.078 - 0.31、15.55 - 372.98、0.31 - 0.93、0.001 - 0.033、0.29 - 1.03和0.04 - 0.197毫克/千克干质量。研究发现，大多数肌肉中所研究金属的含量低于安全限值；然而，两个样本中的无机砷（占总砷的10%）含量超过了鱼类的最大允许量。生态风险评估表明，沉积物中的金属构成低到中等风险。健康风险评估表明，目前食用巢湖的鱼类在金属方面是安全的。
