期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 587, 期 -, 页码 271-278出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.12.014
关键词
Pharmaceutical sludge; NaOH activating; Tetracycline; Biochar; Adsorption
资金
- National Key Research and Development Program of China [2019YFC1906504]
- Guangxi Major Projects of Science and Technology [GXMPSTAA18118013]
The study prepared biochar from two different types of pharmaceutical sludge activated by NaOH using impregnation and dry mixing methods, analyzing their characteristics and adsorption efficiency for tetracycline. The results showed that biochar prepared by dry mixing activation method had better adsorption performance for tetracycline. The study provides valuable information on the use of biochar derived from pharmaceutical sludge for tetracycline removal from wastewater.
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 N-2 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 degrees 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. (c) 2020 Elsevier Inc. All rights reserved.
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