Zhang Xiaorong, Qu Hongyong, Liu Qiaofang, Zhang Yinghong, Hu Deyan, Tian Hua
College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, Shandong, China.
Yantai Ecological Environment Monitoring Center, Yantai, 264001, Shandong, China.
Environ Sci Pollut Res Int. 2023 Jan;30(3):5758-5773. doi: 10.1007/s11356-022-22584-x. Epub 2022 Aug 18.
To obtain systematic knowledge on the waterborne pollution status and ecological and human health risk of total petroleum hydrocarbons (TPHs) and metals in the southeastern Bohai Sea, seawater samples were collected in three seasons from 2014 to 2018. TPHs and mercury (Hg) levels were determined by ultraviolet spectrophotometry and cold atomic absorption spectrometry, respectively, and concentrations of copper (Cu), lead (Pb), and cadmium (Cd) were detected by anodic stripping voltammetry. Spatial distribution patterns indicated that these waterborne pollutants are mainly sourced from terrestrial inputs. Temporal variation showed that Pb contents decreased in the past five years, and summer exhibited higher concentrations of Hg, Cu, and Cd than spring and autumn. Spearman's rank correlation coefficients demonstrated that temperature correlated positively with Cu content, while dissolved oxygen, pH, and suspended particulate material correlated negatively with pollutant concentrations. While hazard quotient values were lower than 1 for TPHs, Hg, Pb, and Cd, the hazard quotient of Cu (4.88) was greater than 1, suggesting potential ecological risks of this element in seawater of the southeastern Bohai Sea. The total target hazard quotients of Hg, Cu, Pb, and Cd in seawater of the southeastern Bohai Sea were all lower than 1, which indicated that there was no noncarcinogenic risk caused by heavy metals in seawater of the southeastern Bohai Sea. However, the carcinogenic risk of Cd (1.54 × 10) was in the range of 10-10, which may lead to the occurrence of cancer. This study sounds an alarm for stricter control of metal emissions into this sea area.
为了系统了解渤海东南部海水中总石油烃（TPHs）和金属的污染状况以及生态和人类健康风险，于2014年至2018年分三个季节采集了海水样本。分别采用紫外分光光度法和冷原子吸收光谱法测定TPHs和汞（Hg）的含量，采用阳极溶出伏安法检测铜（Cu）、铅（Pb）和镉（Cd）的浓度。空间分布模式表明，这些水体污染物主要来源于陆地输入。时间变化表明，过去五年中Pb含量下降，夏季Hg、Cu和Cd的浓度高于春季和秋季。斯皮尔曼等级相关系数表明，温度与Cu含量呈正相关，而溶解氧、pH值和悬浮颗粒物与污染物浓度呈负相关。虽然TPHs、Hg、Pb和Cd的危害商值低于1，但Cu的危害商（4.88）大于1，表明该元素在渤海东南部海水中存在潜在生态风险。渤海东南部海水中Hg、Cu、Pb和Cd的总目标危害商均低于1，这表明渤海东南部海水中重金属不存在非致癌风险。然而，Cd的致癌风险（1.54×10）在10-10范围内，可能导致癌症发生。本研究为更严格控制该海域金属排放敲响了警钟。
