Institute of Environmental Remediation and Human Health, Southwest Forestry University, Kunming, 650224, China.
School of Life Sciences, The Chinese University of Hong Kong, Sha Tin, N.T., Hong Kong, China.
Environ Pollut. 2020 Aug;263(Pt A):114462. doi: 10.1016/j.envpol.2020.114462. Epub 2020 Mar 31.
The seasonal variation and distribution among different matrices of endocrine-disrupting chemicals (EDCs) were investigated in the eutrophic water ecosystem of the Pearl River Delta, Guangdong, China. The chlorophyll a (Chl a) levels were generally higher in summer than in spring; however, the concentrations of 4-tert-octylphenol (OP), 4-nonylphenol (NP), and bisphenol A (BPA) in surface water were generally higher in spring (oligotrophic) than in summer (eutrophic). The levels of EDCs in SPM were lower in spring than in summer, a pattern seen in the seasonal variation of Chl a and particulate organic carbon (POC). The seasonal variations of EDCs in water bodies with different levels of eutrophication were analyzed in several dimensions including sediment, POC, algae and fish bile. The log K for SPM/water was higher in summer than in spring. The log K values for NP, OP, and BPA exhibited the following trends between matrices: colloid/water > sediment/water > SPM/water > algae/water, colloid/water > sediment/water > algae/water > SPM/water, and colloid/water > algae/water > sediment/water > SPM/water. The EDCs levels were different in fish tissues with the order bile > liver > muscle, with the concentrations being an order of magnitude higher in bile than in liver and an order of magnitude higher in liver than in muscle. The sequence of the bioconcentration factor (log BCF) for bile/water and liver/water was NP < OP < BPA in eutrophic conditions, but NP > OP > BPA in oligotrophic conditions. The order in eutrophic conditions was the same as the log BCF and log K for algae/water, indicating that the accumulation of EDCs in water bodies could be affected by algae, which could be one of the reasons of the seasonal variation of EDCs in water.
本研究调查了中国广东珠江三角洲富营养化水域中内分泌干扰物（EDCs）的季节性变化和在不同基质中的分布情况。叶绿素 a（Chl a）的水平通常在夏季高于春季；然而，在表面水中，4-叔辛基酚（OP）、4-壬基酚（NP）和双酚 A（BPA）的浓度通常在春季（贫营养）高于夏季（富营养）。在春季，EDCs 在悬浮颗粒物中的浓度低于夏季，这与 Chl a 和颗粒有机碳（POC）的季节性变化一致。在不同富营养化水平的水体中，EDCs 的季节性变化在沉积物、POC、藻类和鱼类胆汁等几个方面进行了分析。夏季的 SPM/水分配系数（log K）高于春季。NP、OP 和 BPA 的 log K 值在基质之间表现出以下趋势：胶体/水>沉积物/水>SPM/水>藻类/水，胶体/水>沉积物/水>藻类/水>SPM/水，胶体/水>藻类/水>沉积物/水>SPM/水。鱼类组织中 EDCs 的水平不同，顺序为胆汁>肝脏>肌肉，胆汁中的浓度比肝脏高一个数量级，比肌肉高一个数量级。在富营养条件下，胆汁/水和肝脏/水的生物浓缩因子（log BCF）的顺序为 NP<OP<BPA，但在贫营养条件下为 NP>OP>BPA。在富营养条件下的顺序与藻类/水的 log BCF 和 log K 相同，这表明水体中 EDCs 的积累可能受到藻类的影响，这可能是水体中 EDCs 季节性变化的原因之一。
