Effects of Temperature, Solution pH, and Ball-Milling Modification on the Adsorption of Non-steroidal Anti-inflammatory Drugs onto Biochar
Effects of Temperature, Solution pH, and Ball-Milling Modification on the Adsorption of Non-steroidal Anti-inflammatory Drugs onto Biochar
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DOI：
10.1007/s00128-020-02948-0
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发表时间：
2020-08
影响因子：
2.7
通讯作者：
R. Luo;Xiaohui Li;Hongxia Xu;Yuanyuan Sun;Jichun Wu
中科院分区：
文献类型：
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作者：
R. Luo;Xiaohui Li;Hongxia Xu;Yuanyuan Sun;Jichun Wu
研究了生物炭对非甾体抗炎药(NSAIDs)、对乙酰氨基酚(AP)、布洛芬(IB)和水杨酸(SA)的吸附作用。吸附动力学用6种常用的动力学模型进行拟合，吸附等温线用Langmuir和Freundlich模型都能很好地描述。热解时间越长的生物炭对AP、IB和SA的最大吸附容量分别为196 mg/g、132 mg/g和48.8 mg/g。温度的变化对吸附性能几乎没有影响，而pH的影响对非甾体抗炎药和生物炭的物理化学性质都表现出明显的依赖性。然后，在不同的球磨条件下生产了18个球磨(BM)生物炭，并检测了非甾体抗炎药的去除情况。与未研磨的生物炭相比，在最佳条件下生产的BM-生物炭具有更高的去除效率。静电相互作用和生物炭的孔宽对非甾体抗炎药在生物炭上的吸附有很大影响。
This study explored the adsorption of representative non-steroidal anti-inflammatory drugs (NSAIDs), acetaminophen (AP), ibuprofen (IB), and salicylic acid (SA) by biochars. The sorption kinetics were fitted with six commonly used kinetic models, and the isotherm data was well described by both Langmuir and Freundlich models. Biochars of longer pyrolysis time showed better performance with the Langmuir maximum sorption capacities for AP, IB, and SA of 196 mg/g, 132 mg/g, and 48.8 mg/g, respectively. Variation in temperature hardly affected the adsorption performances, while the influence of pH exhibited pronounced dependency on physicochemical properties of both NSAIDs and biochars. Eighteen ball-milled (BM) biochars were then produced under different ball-milling conditions and examined for NSAIDs removal. Compared with unmilled biochars, BM-biochars produced under optimum conditions showed higher removal efficiencies. Electrostatic interaction and pore width of biochars greatly affected the NSAIDs adsorption onto biochars.