College of Environmental Science and Engineering, Hunan University , Changsha, Hunan 410082, People's Republic of China.
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education , Changsha, Hunan 410082, People's Republic of China.
Environ Sci Technol. 2017 Jun 6;51(11):6352-6359. doi: 10.1021/acs.est.7b00073. Epub 2017 May 19.
Adsorption of two estrogen contaminants (17β-estradiol and 17α-ethynyl estradiol) by graphene nanomaterials was investigated and compared to those of a multi-walled carbon nanotube (MWCNT), a single-walled carbon nanotube (SWCNT), two biochars, a powdered activated carbon (PAC), and a granular activate carbon (GAC) in ultrapure water and in the competition of natural organic matter (NOM). Graphene nanomaterials showed comparable or better adsorption ability than carbon nanotubes (CNTs), biochars (BCs), and activated carbon (ACs) under NOM preloading. The competition of NOM decreased the estrogen adsorption by all adsorbents. However, the impact of NOM on the estrogen adsorption was smaller on graphenes than CNTs, BCs, and ACs. Moreover, the hydrophobicity of estrogens also affected the uptake of estrogens. These results suggested that graphene nanomaterials could be used to removal estrogen contaminants from water as an alternative adsorbent. Nevertheless, if transferred to the environment, they would also adsorb estrogen contaminants, leading to great environmental hazards.
研究了石墨烯纳米材料对两种雌激素污染物（17β-雌二醇和 17α-乙炔基雌二醇）的吸附作用，并与多壁碳纳米管（MWCNT）、单壁碳纳米管（SWCNT）、两种生物炭、粉末状活性炭（PAC）和颗粒状活性炭（GAC）在超纯水中和天然有机物（NOM）竞争中的吸附作用进行了比较。在 NOM 预加载下，石墨烯纳米材料的吸附能力与碳纳米管（CNTs）、生物炭（BCs）和活性炭（ACs）相当或更好。NOM 的竞争降低了所有吸附剂对雌激素的吸附。然而，NOM 对雌激素吸附的影响在石墨烯上比 CNTs、BCs 和 ACs 要小。此外，雌激素的疏水性也影响了雌激素的吸收。这些结果表明，石墨烯纳米材料可以作为一种替代吸附剂，用于从水中去除雌激素污染物。然而，如果转移到环境中，它们也会吸附雌激素污染物，从而带来巨大的环境危害。
