Mahlangu Thembisile, Arunachellan Iviwe, Sinha Ray Suprakas, Onyango Maurice, Maity Arjun
Green Engineering Research Group, Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Durban University of Technology, Durban 4000, South Africa.
DSI/CSIR Centre of Nanostructured and Advanced Materials, 1-Meiring Naude Road, Pretoria 0001, South Africa.
Materials (Basel). 2022 Aug 27;15(17):5939. doi: 10.3390/ma15175939.
This study focuses on a greener approach to synthesizing activated carbon by carbonizing tree fibers (TFSA) with 98% HSO at 100 °C. The resulted TFSA was employed as an effective adsorbent for copper ions in aqueous media, yielding copper decorated TFSA (Cu@TFSA). The successful adsorption of copper onto the TFSA was proven through extensive characterization techniques. Herein, the TEM and XPS showed that copper nanoparticles were formed on the TFSA surface, without the use of additional reducing and stabilizing agents nor thermal treatment. The surface areas of TFSA and Cu@TFSA were 0.0150 m/g and 0.3109 m/g, respectively. Applying the Cu@TFSA as an antimicrobial agent against ( ) and resulted in the potential mitigation of complex secondary pollutants from water and wastewater. The Cu@TFSA exhibited outstanding antimicrobial activity against and in both synthetic and raw water samples. This demonstrated a complete growth inhibition observed within 120 min of exposure. The bacteria inactivation took place through the destruction of the bacteria cell wall and was confirmed by the AFM analysis technique. Cu@TFSA has the potential to be used in the water and wastewater treatment sector as antimicrobial agents.
本研究聚焦于一种更环保的方法，即在100°C下用98%的硫酸对树木纤维进行碳化以合成活性炭（TFSA）。所得的TFSA被用作水介质中铜离子的有效吸附剂，得到铜修饰的TFSA（Cu@TFSA）。通过广泛的表征技术证明了铜成功吸附到TFSA上。在此，透射电子显微镜（TEM）和X射线光电子能谱（XPS）表明，在不使用额外的还原和稳定剂且未经热处理的情况下，TFSA表面形成了铜纳米颗粒。TFSA和Cu@TFSA的比表面积分别为0.0150 m²/g和0.3109 m²/g。将Cu@TFSA用作针对（此处原文括号内容缺失）的抗菌剂，有可能减轻水和废水中复杂的二次污染物。Cu@TFSA在合成水样和原水样中均对（此处原文缺失）表现出出色的抗菌活性。这表明在暴露120分钟内观察到完全的生长抑制。细菌失活是通过破坏细菌细胞壁发生的，并通过原子力显微镜（AFM）分析技术得到证实。Cu@TFSA有潜力作为抗菌剂用于水和废水处理领域。
