化工进展 ›› 2022, Vol. 41 ›› Issue (1): 427-434.DOI: 10.16085/j.issn.1000-6613.2021-0127

• 资源与环境化工 • 上一篇    下一篇

生物炭/地聚物复合膜的制备及其对四环素的去除

黄嘉绮(), 葛圆圆(), 李志礼, 王艺频, 崔学民   

  1. 广西大学化学化工学院,广西 南宁 530004
  • 收稿日期:2021-01-19 修回日期:2021-03-11 出版日期:2022-01-05 发布日期:2022-01-24
  • 通讯作者: 葛圆圆
  • 作者简介:黄嘉绮(1995—),女,硕士研究生,研究方向为环境功能材料。E-mail: 980950006@qq.com
  • 基金资助:
    广西自然科学基金(2020GXNSFAA159039)

Preparation of biochar/geopolymer composite film and its removal of tetracycline

HUANG Jiaqi(), GE Yuanyuan(), LI Zhili, WANG Yipin, CUI Xuemin   

  1. School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China
  • Received:2021-01-19 Revised:2021-03-11 Online:2022-01-05 Published:2022-01-24
  • Contact: GE Yuanyuan

摘要:

以碱木质素、偏高岭土、矿渣为原料,通过原位炭化同步自活化的方法制备了一种低成本、易回收、绿色无污染的生物炭/地聚物复合膜(BC/GM)用于催化H2O2产生?OH以降解水中的四环素。通过SEM、XRD、FTIR、XPS等一系列的表征手段分析了BC/GM的形貌结构和理化性质,并且探究了水玻璃模数、碱木质素溶液添加量、煅烧温度对BC/GM催化H2O2降解盐酸四环素效率的影响。结果表明,地聚物无机膜(GM)不仅充当了一种便于生物炭回收利用的多孔载体,防止生物质前体直接炭化结焦,而且有助于碱木质素前体在原位炭化过程中实现同步自活化;在水玻璃模数为1.2、碱木质素溶液添加量为0.2 mL、煅烧温度为600℃时,BC/GM催化H2O2降解盐酸四环素的去除率达到了92.55%,比纯生物炭作为催化剂时提升了近40%。BC/GM具有更高的比表面积和更丰富的含氧官能团,有助于催化H2O2产生?OH,从而实现盐酸四环素的高效降解。

关键词: 生物炭, 地质聚合物, 盐酸四环素, 催化降解, 失活

Abstract:

A low-cost, easy-to-recycle, green and pollution-free biochar/geopolymer composite film (BC/GM) was prepared by in-situ synchronous carbonization and self-activation with alkali lignin, metakaolin and slag for the catalytic degradation of tetracycline antibiotics in water. The morphology and physical and chemical properties of BC/GM were analyzed by SEM, XRD, FTIR and XPS. The effects of water glass modulus, alkali lignin content and calcination temperature on the degradation efficiency of tetracycline hydrochloride by H2O2 were investigated. The results showed that the geopolymer inorganic film (GM) not only acted as a porous carrier to facilitate the recycling of biochar and prevent the biomass precursors from direct carbonization and coking , but also helped to realize synchronous self-activation of alkali lignin precursor in the process of in-situ carbonization. When the water glass modulus was 1.2, the removal rate of alkali lignin was 0.2mL and the calcination temperature was 600℃, the removal rate of H2O2 catalyzed degradation of tetracycline hydrochloride by BC/GM reaches 92.55%, which was 40% higher than that of biochar. The graphitized carbon in BC/GM had a porous structure, which contributes to the generation of ?OH, and eventually realized the efficient degradation of tetracycline hydrochloride.

Key words: biochar, geopolymer, tetracycline hydrochloride, catalytic degradation, deactivation

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