In this study, two different kinds of pharmaceutical sludge activated by NaOH were used to prepare biochar. The characteristics of biochar prepared by impregnation method and dry mixing method were analyzed, including N₂ adsorption–desorption isotherms, surface functional group analysis and micromorphological observation. The results showed that the biochar prepared by impregnation method had more micropores, while that prepared by dry mixing activation method had more mesopores. The adsorption reaction of tetracycline on the two different kind of biochar was investigated. Several important factors such as solution initial pH, tetracycline concentration and reaction time on adsorption reaction were investigated. The results show that both kinds of biochar have high tetracycline adsorption efficiency and excellent pH adaptability. The biochar manufactured by dry mixing activation method had better adsorption performance (379.78 mg/g, 25 °C). Regeneration experiments showed that the adsorbent had stable performance in absorbing tetracycline. Direct dry mixing activation method is a simple and effective method used to prepare porous biochar, which can be used for the resourceful utilization of pharmaceutical sludge. This work provides extensive information on the use of biochar derived from pharmaceutical sludge for the removal of TC from hospital and pharmaceutical production wastewater.

在这项研究中，使用NaOH活化的两种不同的药物污泥制备生物炭。分析了浸渍法和干混法制备的生物炭的特性，包括N _2。吸附-解吸等温线，表面官能团分析和微观形态观察。结果表明，浸渍法制备的生物炭具有更多的微孔，而干混活化法制备的生物炭具有更多的中孔。研究了四环素在两种不同生物炭上的吸附反应。研究了溶液的初始pH，四环素浓度和吸附反应时间等重要因素。结果表明，两种生物炭均具有较高的四环素吸附效率和优异的pH适应性。通过干混活化法制备的生物炭具有更好的吸附性能（379.78 mg / g，25°C）。再生实验表明，该吸附剂具有吸收四环素的稳定性能。直接干混活化法是制备多孔生物炭的一种简单有效的方法，可用于药物污泥的资源化利用。这项工作提供了广泛的信息，说明如何使用源自制药污泥的生物炭去除医院和制药生产废水中的TC。