Preparation of hydrochar with high adsorption performance for methylene blue by co-hydrothermal carbonization of polyvinyl chloride and bamboo
Preparation of hydrochar with high adsorption performance for methylene blue by co-hydrothermal carbonization of polyvinyl chloride and bamboo
复制标题
聚氯乙烯与竹子共水热碳化制备对亚甲基蓝具有高吸附性能的水炭
DOI：
10.1016/j.biortech.2021.125442
复制
发表时间：
2021-06-25
影响因子：
11.4
通讯作者：
Li, Bing
中科院分区：
文献类型：
--
作者：
Li, Hao-Zhe;Zhang, Yu-Nan;Li, Bing
将聚氯乙烯（PVC）掺入竹粉中进行共水热碳化（Co-HTC），研究其对水热炭理化性质和吸附性能的影响。采用Zeta电位、元素分析、BET、FTIR、XPS、Boehm滴定和SEM等手段对水热炭的性质进行了表征。在Co-HTC中加入PVC使水热炭的比表面积、孔容和孔径减小，但表面羟基和羧基含量增加。在473 K下，PVC的加入使水热炭对亚甲基蓝（MB）的吸附能力显著提高。吸附机理主要是MB和水热炭的羧酸根-N（CH 3）2 +之间的静电吸引和MB中吩噻嗪的N原子与水热炭的C-OH之间的氢键作用。因此，Co-HTC为废物转化为高价值吸附剂提供了一种简便、绿色和经济的替代方案。
Polyvinyl chloride (PVC) was blended into bamboo powder during co-hydrothermal carbonization (Co-HTC) to understand the effects on the physicochemical properties and adsorbing ability of hydrochar. The properties of hydrochar were characterized by Zeta potential, elemental analyses, BET, FTIR, XPS, Boehm titration and SEM. The addition of PVC into bamboo in Co-HTC decreased the BET area, and pore volume and radius of hydrochar, but increased the contents of surface hydroxyl and carboxyl groups. The adsorption ability of hydrochar produced by addition of PVC at 473 K over methylene blue (MB) increased significantly. The main adsorption mechanism was electrostatic attraction by -N(CH3)2 + of MB and carboxylate of hydrochar, and hydrogen-bonding interaction through N atom of phenothiazine in MB and C-OH of hydrochar. Thus, Co-HTC offers a facile, green and economical alternative for conversion of waste into high-value adsorbents.