Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Jilin Province, Northeast Normal University, Changchun 130117, China.
Engineering Lab for Water Pollution Control and Resources Recovery, Jilin Province, Northeast Normal University, Changchun 130117, China.
Int J Environ Res Public Health. 2018 Jul 10;15(7):1454. doi: 10.3390/ijerph15071454.
In the current study, graphene oxide, Fe, and Fe were used for the synthesis of magnetic graphene oxide (MGO) by an in situ chemical coprecipitation method. Scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction were used to characterize the well-prepared MGO. The prepared MGO was used as an adsorbent to remove five typical estrogens (estrone (E1), 17β-estradiol (E2), 17-ethinylestradiol (17α-E2), estriol (E3), and synthetic estrogen (EE2)) at the ppb level from spiked ultrapure water and wastewater treatment plant effluent. The results indicated that the MGO can efficiently remove estrogens from both spiked ultrapure water and wastewater treatment plant effluent in 30 min at wide pH ranges from 3 to 11. The temperature could significantly affect removal performance. A removal efficiency of more than 90% was obtained at 35 °C in just 5 min, but at least 60 min was needed to get the same removal efficiency at 5 °C. In addition, an average of almost 80% of the estrogens can still be removed after 5 cycles of MGO regeneration but less than 40% can be reached after 10 cycles. These results indicate that MGO has potential for practical applications to remove lower levels of estrogens from real water matrixes and merits further evaluation.
在本研究中，通过原位化学共沉淀法使用氧化石墨烯（GO）、Fe 和 Fe 合成了磁性氧化石墨烯（MGO）。采用扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱和 X 射线衍射对制备的 MGO 进行了表征。将制备的 MGO 用作吸附剂，以从加标超纯水和污水处理厂出水的 ppb 水平去除 5 种典型的雌激素（雌酮（E1）、17β-雌二醇（E2）、17-乙炔基雌二醇（17α-E2）、雌三醇（E3）和合成雌激素（EE2））。结果表明，MGO 可以在 3 至 11 的宽 pH 范围内从加标超纯水和污水处理厂出水中在 30 分钟内高效去除雌激素。温度会显著影响去除性能。在 35℃下仅需 5 分钟即可获得超过 90%的去除效率，但在 5℃下则需要至少 60 分钟才能达到相同的去除效率。此外，MGO 再生 5 次后，仍可平均去除近 80%的雌激素，但再生 10 次后，去除率不到 40%。这些结果表明，MGO 具有从实际水基质中去除低水平雌激素的实际应用潜力，值得进一步评估。
