Du Linlin, Gao Peng, Liu Yuanli, Minami Tsuyoshi, Yu Chuanbai
Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China.
Institute of Industrial Science, the University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8505, Tokyo, Japan.
Nanomaterials (Basel). 2020 Apr 5;10(4):686. doi: 10.3390/nano10040686.
bstract The removal of Cr(VI) in wastewater plays an important role in human health and environment. In this work, polypyrrole/hollow mesoporous silica particle (PPy/HMSNs) adsorbents have been newly synthesized by in-situ polymerization, which prevent the aggregation of pyrrole in the process of polymerization and exhibit highly selective and powerful adsorption ability for Cr(VI). The adsorption process was in good agreement with the quasi-second-order kinetic model and the Langmuir isotherm model. And the maximum adsorption capacity of Cr(VI) was 322 mg/g at 25 °C. Moreover, the removal rate of Cr(VI) by PPy/HMSNs was ~100% in a number of binary systems, such as Cl/Cr(VI), NO/Cr(VI), SO/Cr(VI), Zn/Cr(VI), Fe/Cr(VI), Sn/Cr(VI), and Cu/Cr(VI). Thus, the PPy/HMSNs adsorbents have great potential for the removal of Cr(VI) in wastewater.
摘要 废水中六价铬的去除对人类健康和环境具有重要意义。在本工作中，通过原位聚合新合成了聚吡咯/中空介孔二氧化硅颗粒（PPy/HMSNs）吸附剂，该吸附剂可防止聚合过程中吡咯的聚集，并且对六价铬表现出高选择性和强大的吸附能力。吸附过程与准二级动力学模型和朗缪尔等温线模型吻合良好。在25℃下，六价铬的最大吸附容量为322 mg/g。此外，在多种二元体系中，如Cl/六价铬、NO/六价铬、SO/六价铬、Zn/六价铬、Fe/六价铬、Sn/六价铬和Cu/六价铬体系中，PPy/HMSNs对六价铬的去除率约为100%。因此，PPy/HMSNs吸附剂在去除废水中六价铬方面具有巨大潜力。
