Organophosphate ester (OPE) flame retardants and plasticizers in surficial sediments were collected in Liao River estuarine wetland during the dry, flood, and level periods to understand the seasonal variation, potential sources, and environmental risks. The concentrations of ∑₁₃OPEs ranged from 19.5 to 67.0 ng g⁻¹ dry weight (dw), with an average concentration of 30.6 ng g⁻¹ dw. OPEs pollution displayed a seasonal variation, the concentrations of OPEs in dry period > level period > flood period. Tributyl-n-phosphate was the predominant OPEs, which accounts for 29.7% of ∑₁₃OPEs. Principal component analysis and positive matrix factorization suggested that the pollution sources of OPEs also varied seasonally. The ecological risk of OPEs to aquatic organisms was low, and the non-carcinogenic and carcinogenic risks to human beings were also far below the acceptable level. 2-Ethylhexyl diphenyl phosphate was the major compound causing ecological and non-carcinogenic risk, while tris-(2-chloroethyl) phosphate had the highest carcinogenic risk.

收集辽河口湿地干、涝、平期表层沉积物中有机磷酸酯（OPE）阻燃剂和增塑剂，以了解其季节变化、潜在来源和环境风险。∑ ₁₃ OPE的浓度范围为 19.5 至 67.0 ng g ^-1干重 (dw)，平均浓度为 30.6 ng g ^-1 dw。OPEs污染呈现季节性变化，枯水期>平季>汛期OPEs浓度。磷酸三丁酯是主要的 OPE，占 ∑ _{13 的}29.7%运营商。主成分分析和正矩阵分解表明OPEs的污染源也存在季节性变化。OPEs对水生生物的生态风险较低，对人类的非致癌和致癌风险也远低于可接受水平。2-乙基己基二苯基磷酸酯是引起生态和非致癌风险的主要化合物，而三（2-氯乙基）磷酸酯的致癌风险最高。