Ionisable emerging pharmaceutical adsorption onto microwave functionalised biochar derived from novel lignocellulosic waste biomass

被引:102
作者
Paunovic, Olivera [1 ]
Pap, Sabolc [1 ,2 ]
Maletic, Snezana [3 ]
Taggart, Mark A. [2 ]
Boskovic, Nikola [1 ]
Sekulic, Maja Turk [1 ]
机构
[1] Univ Novi Sad, Fac Tech Sci, Dept Environm Engn & Occupat Safety & Hlth, Trg Dositeja Obradovica 6, Novi Sad, Serbia
[2] Univ Highlands & Isl, North Highland Coll, Environm Res Inst, Thurso KW14 7JD, Scotland
[3] Univ Novi Sad, Fac Sci, Dept Chem Biochem & Environm Protect, Trg Dositeja Obradovics 3, Novi Sad, Serbia
关键词
Microwave functionalised biochar; Emerging pharmaceutical compounds; Adsorption; Mechanisms; Competitive adsorption; PERSONAL CARE PRODUCTS; ACTIVATED CARBON; AQUEOUS-SOLUTIONS; ASSISTED PREPARATION; INDUSTRY WASTE; DYE ADSORPTION; REMOVAL; WATER; NAPROXEN; CONTAMINANTS;
D O I
10.1016/j.jcis.2019.04.011
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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(pzc), 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. (C) 2019 Elsevier Inc. All rights reserved.
引用
收藏
页码:350 / 360
页数:11
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