Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China.
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541006, PR China.
Ecotoxicol Environ Saf. 2019 Jun 15;174:377-383. doi: 10.1016/j.ecoenv.2019.01.129. Epub 2019 Mar 5.
17β-estradiol (E2) is a steroid estrogen able to affect the reproduction of aquatic organisms even at extremely low concentrations. The behavior of E2 in the presence of chlorella algae was investigated in laboratory experiments. The results showed that the algae's growth was inhibited by 26% after 7 days of culturing in a 2.0 mg L solution of E2. The 96 h EC value of 21.46 mg L reflected moderate toxicity. Even low concentrations of E2 were found to affect total chlorophyll and carotenoid levels after 7 and 10 days and to alter stress-generated enzymatic activity in the algae. The efficiency of chlorella's E2 degradation decreased with the increasing of E2 concentration, but 92% of the E2 can be removed from a 0.5 mg L solution over 10 days. The degradation mechanism was speculated. The microalgae suffered relatively less growth inhibition at low E2 concentrations, and their removal effectiveness was then better. The data help to elucidate the interaction between chlorella algae and E2 in an aquatic environment.
17β-雌二醇（E2）是一种甾体雌激素，即使在极低浓度下也能影响水生生物的繁殖。在实验室实验中研究了 E2 在小球藻存在下的行为。结果表明，在 2.0 mg/L 的 E2 溶液中培养 7 天后，藻类的生长受到抑制 26%。96 h 的 EC 值为 21.46 mg/L，反映出中度毒性。即使低浓度的 E2 也被发现会在 7 天和 10 天后影响总叶绿素和类胡萝卜素水平，并改变藻类中应激产生的酶活性。随着 E2 浓度的增加，小球藻降解 E2 的效率降低，但在 10 天内可从 0.5 mg/L 的溶液中去除 92%的 E2。推测了降解机制。小球藻在低浓度 E2 下受到的生长抑制相对较小，然后去除效果更好。这些数据有助于阐明小球藻和 E2 在水生环境中的相互作用。
