On-site sampling analysis and laboratory-scale experiments were conducted to study the pollution status and release potential of EDCs in Erhai Lake. We found that nitrogen and phosphorus pollution in Erhai Lake sediment were both at a high level, as well as EDCs pollution. The concentrations of BPA, E2α, E1, E2β, EE2, and E3 were 36.84 ng/g(DW), 13.04 ng/g(DW), 128.97 ng/g(DW), 52.57 ng/g(DW), 18.48 ng/g(DW) and 5.36 ng/g(DW), respectively. The concentrations of E2α, E1, E2β and EE2 in the bottom water were higher than the surface water due to the impact of sediment release. The results of the 20 days release test indicated that BPA release from the sediment had a greater correlation with the original concentration and the particle size of sediment, while the steroid EDCs had no obvious correlation with these two factors, probably due to the difference in hydrophobicity between them. Under hydraulic disturbance and aerobic conditions, the release process of EDCs was accompanied by a large amount of microbial degradation, and degradation amount > released amount. BPA was released quickly, 9.56% was released in 20 days, but only 3.37% of steroid EDCs released. In comparison, the release process of steroids was longer and posed a greater threat to aquatic ecology.

进行了现场采样分析和实验室规模的实验，以研究Er海EDCs的污染状况和释放潜力。我们发现Er海沉积物中的氮和磷污染水平都很高，而EDCs污染水平都很高。BPA，E2α，E1，E2β，EE2和E3的浓度分别为36.84 ng / g（DW），13.04 ng / g（DW），128.97 ng / g（DW），52.57 ng / g（DW），18.48 ng / g（DW）和5.36 ng / g（DW）。由于沉积物释放的影响，底水中E2α，E1，E2β和EE2的浓度高于地表水中。20天释放试验的结果表明，沉积物中BPA的释放与原始浓度和沉积物的粒径具有更大的相关性，而类固醇EDC与这两个因素没有明显的相关性，可能是由于它们之间疏水性的差异。在水力扰动和有氧条件下，EDCs的释放过程伴随着大量的微生物降解，降解量>释放量。BPA迅速释放，在20天内释放了9.56％，但仅释放了3.37％的类固醇EDC。相比之下，类固醇的释放过程更长，并且对水生生态构成更大的威胁。