Huang Hua, Niu Zhirui, Shi Ruru, Tang Jingchun, Lv Lei, Wang Jian, Fan Yimo
School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an 716000, Shaanxi, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; Yan'an Key Laboratory of Environmental Monitoring and Remediation, Yan'an 716000, Shaanxi, China.
School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an 716000, Shaanxi, China.
Bioresour Technol. 2020 Jun;306:123096. doi: 10.1016/j.biortech.2020.123096. Epub 2020 Mar 3.
Poplar hydrochar (RHC) was activated by thermal oxidation (TA-O) in air at 300 °C (O300) and in air + N (0.5% O) at 500 and 700 °C (O500 and O700), respectively, and in N at 300-700 °C (N300-N700) as control. Samples characterized by various methods were used to analyze their effect on tetracycline adsorption. The results showed that TA-O greatly increased adsorption capacity q (mg·g, C = 100 mg·L) from 6.29 for RHC to 33.32, 96.23 and 60.90 for O300, O500 and O700, respectively. The O300 increased carboxyl and aromaticity whereas little influenced on porosity. The O500, with the highest S and S, enhanced adsorption probably by micropore filling and π-π interactions. The O700 fused micropore into mesopore but decreased the S, S and q. Thus, thermal oxidation at 500 °C and 0.5% O is recommended for hydrochar activation to absorb tetracycline.
分别在300℃的空气中（O300）、500℃和700℃的空气+氮气（0.5%氧气）中（O500和O700）以及300 - 700℃的氮气中（N300 - N700）通过热氧化（TA - O）对杨树水炭（RHC）进行活化，其中N300 - N700作为对照。使用多种方法对样品进行表征，以分析它们对四环素吸附的影响。结果表明，热氧化极大地提高了吸附容量q（mg·g，C = 100 mg·L），从RHC的6.29分别提高到O300、O500和O700的33.32、96.23和60.90。O300增加了羧基和芳香性，而对孔隙率影响较小。具有最高比表面积（S）和总孔容（V）的O500，可能通过微孔填充和π - π相互作用增强了吸附。O700使微孔融合为中孔，但降低了比表面积（S）、总孔容（V）和吸附容量（q）。因此，建议在500℃和0.5%氧气条件下进行热氧化以活化水炭来吸附四环素。
