Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China.
Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China.
Bioresour Technol. 2021 Oct;337:125442. doi: 10.1016/j.biortech.2021.125442. Epub 2021 Jun 22.
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(CH) 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.
聚氯乙烯（PVC）在共水热碳化（Co-HTC）过程中被混入竹粉中，以了解其对水热炭理化性质和吸附能力的影响。通过 Zeta 电位、元素分析、BET、FTIR、XPS、Boehm 滴定和 SEM 对水热炭的性质进行了表征。在 Co-HTC 中，将 PVC 添加到竹粉中会降低水热炭的 BET 表面积、孔体积和半径，但会增加表面羟基和羧基的含量。在 473 K 下，添加 PVC 的水热炭对亚甲基蓝（MB）的吸附能力显著提高。主要的吸附机制是 MB 的 -N(CH) 和水热炭的羧酸盐之间的静电吸引，以及 MB 中苯并噻嗪的 N 原子和水热炭的 C-OH 之间的氢键相互作用。因此，Co-HTC 为将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法。
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