University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Trg Dositeja Obradovica 6, Novi Sad, Serbia.
University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Trg Dositeja Obradovica 6, Novi Sad, Serbia; Environmental Research Institute, North Highland College, University of the Highlands and Islands, Thurso, Scotland KW14 7JD, UK.
J Colloid Interface Sci. 2019 Jul 1;547:350-360. doi: 10.1016/j.jcis.2019.04.011. Epub 2019 Apr 4.
Functionalised biochar (WpOH) was prepared from wild plum kernels using simultaneous pyrolysis and microwave potassium hydroxide (KOH) functionalisation. This was then applied to the removal (from water) of an ionisable pharmaceutical - naproxen (NPX). Characterization of the WpOH was carried out using pH, SEM/EDX, BET, FTIR, XRD, and the principle adsorption mechanisms were thoroughly studied. A pseudo-second order kinetic model best described the reaction kinetic behaviour, and the Langmuir isotherm provided the best fit to the results. The maximum adsorptive interaction (73.14 mg/g) occurred between pH 5 and 7 through electrostatic attraction (the main interaction mechanism) between the negatively charged NPX and the positively charged WpOH functional groups. In addition, hydrogen-bonding and electron-donor-acceptor (EDA) interactions were important. In a competitive study, using NPX and carbamazepine (a basic/amphoteric drug), the different nature/structure of the two compounds resulted in slight competitive adsorption. The results demonstrate the potential for wild plum kernel biochar to be used in the efficient removal of emerging contaminants such as pharmaceuticals from water.
采用同步热解和微波氢氧化钾（KOH）功能化的方法，从野生李核中制备了功能化生物炭（WpOH）。然后将其应用于去除可电离的药物 - 萘普生（NPX）。通过 pH 值、SEM/EDX、BET、FTIR、XRD 对 WpOH 进行了表征，并深入研究了主要的吸附机理。准二级动力学模型最能描述反应动力学行为，Langmuir 等温线最能拟合结果。在 pH 5 到 7 之间，通过带负电荷的 NPX 和带正电荷的 WpOH 官能团之间的静电吸引（主要的相互作用机制），发生了最大的吸附相互作用（73.14 mg/g）。此外，氢键和电子供体-受体（EDA）相互作用也很重要。在竞争性研究中，使用 NPX 和卡马西平（一种碱性/两性药物），两种化合物的不同性质/结构导致了轻微的竞争吸附。结果表明，野生李核生物炭具有从水中有效去除新兴污染物（如药物）的潜力。
