College of Architecture Engineering, Beijing University of Technology, Beijing, 100124, China.
College of Architecture Engineering, Beijing University of Technology, Beijing, 100124, China.
Chemosphere. 2019 Dec;236:124254. doi: 10.1016/j.chemosphere.2019.06.224. Epub 2019 Jul 1.
Application of biochar as an adsorbent for wastewater treatment has obtained a tremendous research interest owning to their low cost and surface functionality. In this research, an iron loaded sludge biochar was successfully prepared through a simple and economical one-step modification hydrothermal method. The iron loaded sludge biochar possesses large amounts of surface organic functional groups (such as hydroxy, carboxyl and aromatic ring, etc.), smaller particle size (about 10 nm) as well as relative higher surface area (82.780 m g) than of the pristine one. The selective removal of two kinds of antibiotics by the prepared products was demonstrated. Experimental data was fitted to isotherm and kinetic models, and thermodynamic parameters were also calculated. In the single antibiotic system, the maximum adsorption amount of tetracycline (TC) and doxycycline (DOX) could reach 104.86 and 128.98 mg g at 293.15 K, respectively. In the binary antibiotics system, there was an antagonistic effect between TC and DOX. Furthermore, the adsorption of TC was much more inhibited than that of DOX owning to its deferent steric hindrance of molecular structure.
生物炭作为一种吸附剂在废水处理中的应用由于其低成本和表面功能而引起了极大的研究兴趣。在这项研究中，通过简单经济的一步水热改性法成功制备了负载铁的污泥生物炭。与原生物炭相比，负载铁的污泥生物炭具有大量的表面有机官能团（如羟基、羧基和芳环等）、更小的粒径（约 10nm）和相对较高的表面积（82.780m²/g）。结果表明，所制备的产品对两种抗生素具有选择性去除能力。通过实验数据拟合了等温线和动力学模型，并计算了热力学参数。在单一抗生素体系中，四环素（TC）和强力霉素（DOX）的最大吸附量分别在 293.15K 时达到 104.86 和 128.98mg/g。在二元抗生素体系中，TC 和 DOX 之间存在拮抗作用。此外，由于其分子结构的空间位阻不同，TC 的吸附受到了更大的抑制。
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