Enhanced Fenton-like process over Cu/L(+)-ascorbic acid co-doping mesoporous silica for toxicity reduction of emerging contaminants

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Yuhang Liu, Wenxuan Deng, Xiaojun Wu, Chun Hu, Lai Lyu
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引用次数: 0

Abstract

Effective removal of emerging contaminants (ECs) to minimize their impacts on human health and the natural environment is a global priority. For the removal of ECs in water, we fabricated a seaweed spherical microsphere catalyst with Cu cation-π structures by in situ doping of Cu species and ascorbic acid in mesoporous silica (Cu-C-MSNs) via a hydrothermal method. The results indicate that bisphenol A (BPA) is substantially degraded within 5 min under natural conditions, with its biological toxicity considerably weakened. Moreover, industrial wastewater could also be effectively purified by Cu-C-MSNs/H2O2 system. The presence of metal sites and the complexation of ECs via cation-π interaction and π-π stacking on the catalyst surface were directly responsible for the polarization distribution of electrons, thus activating H2O2 and dissolved oxygen (DO). The removal of contaminants could be attributed primarily to 1) the activation of H2O2 into OH to attack the contaminants and 2) self-cleavage because of the transfer of electrons from the contaminants to the catalysts. This study provides an innovative solution for the effective treatment of ECs and has positive implications for easing global environmental crises.

Abstract Image

在 Cu/L(+)-抗坏血酸共掺杂介孔二氧化硅上强化类似芬顿的过程,以降低新出现污染物的毒性
有效去除新出现的污染物(ECs)以尽量减少其对人类健康和自然环境的影响是全球的当务之急。为了去除水中的ECs,我们通过水热法在介孔二氧化硅(Cu-C-MSNs)中原位掺入Cu物种和抗坏血酸,制备了一种具有Cu阳离子-π结构的海藻球形微球催化剂(Cu-C-MSNs)。结果表明,在自然条件下,双酚 A(BPA)可在 5 分钟内被大量降解,其生物毒性大大减弱。此外,Cu-C-MSNs/H2O2 系统还能有效净化工业废水。催化剂表面金属位点的存在以及通过阳离子-π相互作用和π-π堆积作用络合的导电率,直接导致了电子的极化分布,从而激活了 H2O2 和溶解氧(DO)。污染物的去除主要归因于:1)H2O2 被活化为 -OH 来攻击污染物;2)由于电子从污染物转移到催化剂上而产生自裂解。这项研究为有效处理有机污染物提供了一种创新解决方案,对缓解全球环境危机具有积极意义。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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