标题: Effectively removing tetracycline from water by nanoarchitectured carbons derived from CO2: Structure and surface chemistry influence

作者: Yang, J (Yang, Juan); Liu, X (Liu, Xiang); Song, KX (Song, Kexin); Li, XY (Li, Xinyue); Wang, DH (Wang, Dihua)

来源出版物: ENVIRONMENTAL RESEARCH 卷: 195 文献号: 110883 DOI: 10.1016/j.envres.2021.110883 出版年: APR 2021

摘要: Understanding of the correlation between physico-chemical property of adsorbent and the adsorption performance of contaminant is very significant for developing high-efficient materials to remove antibiotic contamination from water. In this work, a novel kind of carbon adsorbent (EC) derived from CO2 and activated ECs with modified structure via a facile chemical method using H-2 and KOH were prepared. The synthetic carbon materials (EC, EC-H-2, and EC-KOH) were then applied to remove tetracycline (TC). The kinetics of adsorption for these three carbon materials all well fitted the pseudo-second-order kinetic model. The experimental data of adsorption isotherm had good compatibility with Langmuir and Freundlich models (R-2 > 0.90), but the Temkin model was the most applicable for all adsorbents (R-2 > 0.98). A super-high adsorption capacity of EC-KOH obtained from Langmuir fitting was 933.56 mg g(-1), which was much higher than that of EC-H-2 (538.91 mg g(-1)) and EC (423.30 mg g(-1)), possibly due to its larger specific surface area (SBET), pore volume, and specific surface chemical structure. Moreover, it was found that surface functional groups and large aperture of adsorbents had a positive effect on adsorption rate. More adsorption sites and surface functional groups of adsorbents were beneficial to enhance the adsorption affinity. These results are of great benefit to the directional control of carbon structure to increase the adsorption performance in rate, capacity, and affinity of antibiotics.

作者关键词: Adsorption; Electrolytic carbon; Modification; Tetracycline; CO2; Mechanism

地址: [Yang, Juan; Liu, Xiang; Song, Kexin; Li, Xinyue; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

[Wang, Dihua] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.

通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址: wangdh@whu.edu.cn

影响因子：6.498