State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, China.
Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental & Chemical Engineering, Nanchang University, Nanchang 330031, China.
Sci Total Environ. 2022 Feb 20;808:151892. doi: 10.1016/j.scitotenv.2021.151892. Epub 2021 Nov 24.
Poyang Lake is the first freshwater lake in China, which is an important drinking water source. In recent years, industrial pollution has led to the increased phthalate acid esters (PAEs) in Poyang Lake. PAEs are a class of typical endocrine disruptors that can accumulate in organisms and interfere with their secretion systems. Thus, the accurate determination of PAEs in Poyang Lake is important for health risk prediction and the development of corresponding control means. Monitoring organic pollutants in water using the diffusive gradient in thin films technique (DGT) has attracted much attention due to more accuracy and convenience than the traditional methods. This study used an inexpensive amphiphilic cyclodextrin polymer (PBCD) as the sorbent for the binding gel. This new binding gel has an ultra-high specific surface area and excellent adsorption performance. Diffusion coefficients of the five PAEs were determined, and the performance of DGT such as adsorption capacity and deployment time (1-4 days) was tested using five PAEs as models. The assembled PBCD-DGT was used to examine the performance in a complex simulated water environment. The sampling capability of PBCD-DGT was verified in Yangshan Lake, and a large-scale field application was conducted in Poyang Lake basin. The results of 11 sampling points showed that the concentration ranges of dimethyl phthalate, diethyl phthalate, diallyl phthalate, dipropyl phthalate, and dibutyl phthalate were 434-2594 ng/L, 40-314 ng/L, 80-527 ng/L, 45-308 ng/L, and ND-182 ng/L, respectively. The health risk index (HI) and ecological risk quotient (RQ) values of PAEs in the Poyang Lake watershed were far below 1, indictating a lower health and ecological risk. Considering that PAEs are bioaccumulative and persistent, it is very necessary to continue to pay attention to its pollution status and health and ecological risk changes in Poyang Lake Basin in the future.
鄱阳湖是中国第一大淡水湖，是重要的饮用水源地。近年来，工业污染导致鄱阳湖酞酸酯（PAEs）含量增加。PAEs 是一类典型的内分泌干扰物，可在生物体内蓄积并干扰其分泌系统。因此，准确测定鄱阳湖 PAEs 对于健康风险预测和相应控制措施的制定具有重要意义。与传统方法相比，采用扩散梯度薄膜技术（DGT）监测水中有机污染物具有更高的准确性和便利性，引起了广泛关注。本研究采用一种廉价的两亲性环糊精聚合物（PBCD）作为结合凝胶的吸附剂。这种新型结合凝胶具有超高的比表面积和优异的吸附性能。测定了 5 种 PAEs 的扩散系数，以 5 种 PAEs 为模型，测试了 DGT 的吸附容量和部署时间（1-4 天）等性能。组装的 PBCD-DGT 用于在复杂模拟水环境中检验其性能。在羊山湖水体中验证了 PBCD-DGT 的采样能力，并在鄱阳湖流域进行了大规模的野外应用。11 个采样点的结果表明，邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二烯丙酯、邻苯二甲酸二丙酯和邻苯二甲酸二丁酯的浓度范围分别为 434-2594ng/L、40-314ng/L、80-527ng/L、45-308ng/L 和 ND-182ng/L。鄱阳湖流域 PAEs 的健康风险指数（HI）和生态风险商（RQ）值均远低于 1，表明健康和生态风险较低。考虑到 PAEs 具有生物蓄积性和持久性，因此非常有必要在未来继续关注鄱阳湖流域 PAEs 的污染状况及其健康和生态风险变化。
