State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, The Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
College of Agronomy and Biotechnology, China Agriculture University, Beijing, 100193, China.
Environ Res. 2024 Jun 1;250:118376. doi: 10.1016/j.envres.2024.118376. Epub 2024 Feb 12.
Antibiotic mycelial dreg (AMD) has been categorized as hazardous waste due to the high residual hazardous contaminants. Inappropriate management and disposal of AMD can cause potential environmental and ecological risks. In this study, the potential of pleuromutilin mycelial dreg (PMD) as a novel feedstock for preparing tetracycline hydrochloride (TC) adsorbent was explored to achieve safe management of PMD. The results suggested that residual hazardous contaminants were completely eliminated after pyrolysis. With the increase of pyrolysis temperature, the yields, H/C, O/C, (O + N)/C, and pore size in PMD-derived biochars (PMD-BCs) decreased, while BET surface area and pore volume increased, resulting in the higher stability of the PMD-BCs prepared from higher temperatures. The TC adsorption of the PMD-BCs increased from 27.3 to 46.9 mg/g with the increase of the pyrolysis temperature. Surprisingly, pH value had a strong impact on the TC adsorption, the adsorption capacity of BC-450 increased from 6.5 to 71.1 mg/g when the solution pH value increased from 2 to 10. Lewis acid-base interaction, pore filling, π-π interaction, hydrophobic interaction, and charge-assisted hydrogen bond (CAHB) are considered to drive the adsorption. This work provides a novel pathway for the concurrent detoxification and reutilization of AMD.
抗生素菌丝废渣 (AMD) 由于含有高浓度的残余危险污染物而被归类为危险废物。AMD 的不当管理和处置可能会对环境和生态造成潜在风险。在本研究中，探索了利用腐植菌素菌丝废渣 (PMD) 作为一种新型原料来制备盐酸四环素 (TC) 吸附剂，以实现 PMD 的安全管理。结果表明，热解后残余危险污染物被完全去除。随着热解温度的升高，PMD 衍生生物炭 (PMD-BC) 的产率、H/C、O/C、(O+N)/C 和孔径减小，而 BET 比表面积和孔体积增加，导致更高温度下制备的 PMD-BC 更稳定。PMD-BC 的 TC 吸附量从 27.3 增加到 46.9 mg/g，随着热解温度的升高而增加。令人惊讶的是，pH 值对 TC 吸附有很强的影响，当溶液 pH 值从 2 增加到 10 时，BC-450 的吸附容量从 6.5 增加到 71.1 mg/g。路易斯酸碱相互作用、孔填充、π-π 相互作用、疏水相互作用和电荷辅助氢键 (CAHB) 被认为是驱动吸附的因素。这项工作为 AMD 的同时解毒和再利用提供了一条新途径。
