生物炭
过硫酸盐
零价铁
化学
纳米-
卡马西平
复合数
降级(电信)
膜
热解
化学工程
材料科学
催化作用
复合材料
吸附
有机化学
计算机科学
工程类
生物化学
电信
神经科学
癫痫
生物
作者
Yongtao Xue,Mohammadreza Kamali,Alina Liyakat,M. Bruggeman,Muhammad Zeeshan,Barbara Rossi,Maria Elisabete V. Costa,Lise Appels,Raf Dewil
标识
DOI:10.1016/j.scitotenv.2023.165535
摘要
In this study, novel walnut shell biochar-nano zero-valent iron nanocomposites (WSBC-nZVI) were synthesized using a combined pyrolysis/reduction process. WSBC-nZVI displayed a high removal efficiency (86 %) for carbamazepine (CBZ) compared with walnut shell biochar (70 %) and nano zero-valent iron (76 %) in the presence of persulfate (PS) (0.5 g/L catalyst, 10 mg/L CBZ, 1 mM persulfate). Subsequently, WSBC-nZVI was applied for the fabrication of the membrane using a phase inversion method. The membrane demonstrated an excellent removal efficiency of 91 % for CBZ in a dead-end system (2 mg/L CBZ, 1 mM persulfate). In addition, the effect of various operating conditions on the degradation efficiency in the membrane/persulfate system was investigated. The optimum pH was close to neutral, and an increase in CBZ concentration from 1 mg/L to 10 mg/L led to a drop in removal efficiency from 100 % to 24 %. The degradation mechanisms indicated that oxidative species, including 1O2, OH, SO4-, and O2-, all contribute to the degradation of CBZ, while the role of 1O2 is highlighted. The CBZ degradation products were also investigated, and the possible pathways and the predicted toxicity of intermediates were proposed. Furthermore, the practical use of the membrane was validated by the treatment of real wastewater.
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