Combination tanning mechanism inspired environmentally benign catalyst for efficient degradation of tetracycline

Meng Xiao, Shuangmei Liu, Wenqian Qi, Yu Peng, Qingyu Yan, Hui Mao
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Abstract

The utilization of chelation reaction between metals and tannins is a common tanning method in leather chemistry. Herein, a novel combination tanning mechanism inspired environmentally benign catalyst (CMBT-Fe0) was synthesized by immobilizing Fe nanoparticles onto bayberry tannin (BT) grafted chitosan microfibers (CM). The obtained catalyst featured a well-defined microfibrous structure, on which Fe0 nanoparticles were highly dispersed to exhibit exceptional catalytic activity for the degradation of tetracycline (TC). The catalytic activity of CMBT-Fe0 was 1.72 times higher than that of the commercial Fe0 nanoparticles without immobilization, with 95.03% of TC degraded within 90.0 min. The CMBT-Fe0 catalysts were recycled 6 times, with the removal rate of TC maintained at 82.56%. Furthermore, a possible mechanism responsible for the catalytic removal of TC was provided by analyzing the catalytic degradation products via liquid chromatography-mass spectrometry. Therefore, our investigation successfully developed efficient catalysts to address the concerned environmental issue of antibiotic pollution.

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组合鞣制机理启发的环境良性催化剂高效降解四环素
利用金属与单宁之间的螯合反应制革是皮革化学中常用的制革方法。本文以杨梅单宁(BT)接枝壳聚糖微纤维(CM)为载体,将铁纳米颗粒固定在杨梅单宁(BT)接枝壳聚糖微纤维(CM)上,合成了一种新型的环境友好型复合鞣催化剂(CMBT-Fe0)。所制备的催化剂具有良好的微纤维结构,Fe0纳米颗粒高度分散,对四环素(TC)的降解表现出优异的催化活性。CMBT-Fe0的催化活性比未固定化的商用Fe0纳米颗粒高1.72倍,在90.0 min内降解了95.03%的TC。CMBT-Fe0催化剂循环使用6次,TC的去除率保持在82.56%。此外,通过液相色谱-质谱联用技术对催化降解产物进行分析,提出了催化脱除TC的可能机理。因此,我们的研究成功地开发了有效的催化剂,以解决抗生素污染这一令人关注的环境问题。图形抽象
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来源期刊
Journal of Leather Science and Engineering
Journal of Leather Science and Engineering 工程技术-材料科学:综合
CiteScore
12.80
自引率
0.00%
发文量
29
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