Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, China; Environmental and Occupational Health Sciences, School of Public Health, University of Illinois at Chicago, Chicago, 60612, USA; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519080, Zhuhai, China.
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519080, Zhuhai, China.
Environ Pollut. 2020 Aug;263(Pt B):114426. doi: 10.1016/j.envpol.2020.114426. Epub 2020 Mar 20.
As emerging pollutants, the occurrence and risks of organophosphate esters (OPEs) in mariculture farms should be concerned; however, information is limited. Beibu Gulf is one of the essential mariculture zones in China. This study aimed to investigate the occurrence of OPEs in mariculture farms of the Beibu Gulf, their phase distribution and bioaccumulation among sediment, organisms (shrimp, crab, and oyster), water, and feed. Human exposure to OPEs through seafood consumption was also assessed. The total concentrations of the 11 target OPEs (∑OPEs) in the water samples ranged 32.9-227 ng L. It was significantly higher in water from the culture ponds (mean 122 ng L) than in water from the estuaries and nearshore areas (mean 51.1 ng L) (nonparametric test, p < 0.05). ∑OPEs in the feeds averaged 46.0 (range 21.7-84.5) ng g dw, which is similar to the level in the organism samples (mean 55.5, range 21.3-138 ng g dw) and 4.4 times higher than that in the sediment (mean 10.9, range 35-22.1 ng g dw). The ∑OPEs released from the feeds to the culture ponds was estimated to be 49 μg m per three-month period. In the aquaculture ponds, the sediment-water distribution coefficient (log K), and the bioaccumulation factors from the water (log BWAFs) or the feed (log BFAFs) to the organisms, depend linearly on the hydrophobicity (log K) of OPEs. The log BWAFs and log BFAFs increased with increasing log K within the log K range of 1-7. The human exposure to OPEs through consumption of shrimp, crab, and oysters from the mariculture farms does not pose a health risk at present.
作为新兴污染物，海洋养殖农场中有机磷酸酯 (OPEs) 的出现及其风险应引起关注；然而，相关信息有限。北部湾是中国重要的海洋养殖区之一。本研究旨在调查北部湾海洋养殖农场中 OPEs 的存在情况、它们在沉积物、生物（虾、蟹和牡蛎）、水和饲料中的分布和生物蓄积情况。还评估了通过食用海鲜摄入 OPEs 对人体的影响。水样中 11 种目标 OPEs（∑OPEs）的总浓度范围为 32.9-227ng/L。养殖池塘中的 OPEs 浓度（平均值 122ng/L）明显高于河口和近岸海域（平均值 51.1ng/L）（非参数检验，p<0.05）。饲料中∑OPEs 的平均值为 46.0（范围 21.7-84.5）ng/gdw，与生物体样本（平均值 55.5，范围 21.3-138ng/gdw）的水平相似，是沉积物（平均值 10.9，范围 35-22.1ng/gdw）的 4.4 倍。估计每三个月从饲料中释放到养殖池塘的∑OPEs 为 49μg/m。在水产养殖池塘中，沉积物-水分配系数（log K）以及从水（log BWAFs）或饲料（log BFAFs）到生物体的生物蓄积因子，与 OPEs 的疏水性（log K）呈线性关系。在 log K 为 1-7 的范围内，log BWAFs 和 log BFAFs 随 log K 的增加而增加。目前，通过食用海洋养殖农场的虾、蟹和牡蛎摄入 OPEs 不会对人体健康构成风险。
