College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, Liaoning, China.
Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Ministry of Education, Shenyang, 110044, China.
Chemosphere. 2020 Sep;255:126917. doi: 10.1016/j.chemosphere.2020.126917. Epub 2020 Apr 30.
The hybrid nanocomposites of zero-valent iron loaded the activated carbon derived from the corn stalk (ZVI@ACCS) was prepared and used to remove the antibiotics of tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC) from aqueous solution. The adsorption amounts of three antibiotics (103.1 mg g for CTC, 72.9 mg g for OTC and 81.5 mg g for TC) were sensitive to the temperature and independent of pH in the range of 4.2-7.1 at 298 K through the synergistic interactions of the electrostatic attraction, the bridging complexation and the surface complexation. The equilibrium was performed within 20 min at 298 K. The spontaneous (ΔG<0) and endothermic (ΔH>0) adsorption of three antibiotics onto the ZVI@ACCS nanocomposites gave a better matching (r > 0.99) with Langmuir and pseudo-second-order models.
负载零价铁的活性炭（ZVI@ACCS）的杂化纳米复合材料被制备出来，并用于从水溶液中去除抗生素四环素（TC）、土霉素（OTC）和金霉素（CTC）。三种抗生素（CTC 的吸附量为 103.1mg/g，OTC 的吸附量为 72.9mg/g，TC 的吸附量为 81.5mg/g）对温度敏感，在 298K 时，在 4.2-7.1 的 pH 范围内，通过静电吸引、桥联络合和表面络合的协同作用，吸附量与 pH 值无关。在 298K 下，平衡在 20min 内完成。三种抗生素自发（ΔG<0）和吸热（ΔH>0）吸附到 ZVI@ACCS 纳米复合材料上，与朗缪尔和准二级模型更好地匹配（r>0.99）。
