Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Sino-Danish College, University of Chinese Academy of Sciences, Beijing, 100049, China.
School of Water and Environment, Chang'an University, Xi'an, 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region (Chang'an University), Ministry of Education, Xi'an, 710054, China.
Ecotoxicol Environ Saf. 2020 Nov;204:111093. doi: 10.1016/j.ecoenv.2020.111093. Epub 2020 Aug 14.
Phenolic Endocrine Disrupting Chemicals (EDCs) have drawn more and more interest due to their prevalence and persistence in aquatic environment. To study the adsorption of various phenolic EDCs on river sediments under natural conditions, we first sought to analyze the distribution characteristics of phenol and bisphenol A (BPA) in sediment from the Bahe River. The static adsorption experiments contained either single- or dual-contaminant of phenol and/or BPA in the system; they were conducted to characterize the adsorption of these two pollutants in the surface sediments and the main factors affecting the adsorption processes of the dual-contaminant system, including particle size, humic acid (HA) concentration, pH, and temperature. Results showed that in certain seasons, there was a significant correlation between the levels of phenol and BPA in Bahe sediments. When comparing the adsorption behaviors of phenol and BPA on sediments in single- and dual-contaminant systems, we found that the phenol adsorption behavior varied, while that of BPA remained consistent across the different systems. Moreover, different effects were observed with regards to a single factor and the interaction of multiple factors on the adsorption of pollutants. Of the four single factors, only HA concentration had a significant effect on the phenol adsorption in sediment. When considering the interaction of multiple factors, the interaction between HA concentration and temperature significantly promoted the adsorption of phenol. The influence of factors on the adsorption of BPA was in the following order: particle size > HA concentration > pH > temperature. Particle size significantly inhibited BPA adsorption in the sediment, while the interaction between particle size and pH increased BPA adsorption.
由于酚类内分泌干扰化学物质（EDCs）在水生环境中的普遍存在和持久性，它们引起了越来越多的关注。为了研究在自然条件下各种酚类 EDCs 在河流沉积物上的吸附情况，我们首先试图分析巴河沉积物中苯酚和双酚 A（BPA）的分布特征。该静态吸附实验系统中存在单一或双污染物（苯酚和/或 BPA），其目的是表征这两种污染物在表层沉积物中的吸附情况，以及影响双污染物系统吸附过程的主要因素，包括粒径、腐殖酸（HA）浓度、pH 值和温度。结果表明，在某些季节，巴河沉积物中苯酚和 BPA 的水平之间存在显著相关性。在比较单一和双污染物系统中苯酚和 BPA 在沉积物上的吸附行为时，我们发现苯酚的吸附行为发生了变化，而 BPA 的吸附行为在不同系统中保持一致。此外，单一因素和多个因素的相互作用对污染物的吸附有不同的影响。在这四个单一因素中，只有 HA 浓度对沉积物中苯酚的吸附有显著影响。当考虑多个因素的相互作用时，HA 浓度和温度之间的相互作用显著促进了苯酚的吸附。各因素对 BPA 吸附的影响顺序为：粒径>HA 浓度>pH 值>温度。粒径显著抑制了 BPA 在沉积物中的吸附，而粒径和 pH 值之间的相互作用增加了 BPA 的吸附。
