Abstract
The presence of bromate in water sources generates environmental concern due to its toxicity for humans. Diverse technologies, like membranes, ion exchange, chemical reduction, etc., can be employed to treat bromate-polluted water but they produce waste that must be treated. An alternative to these technologies can be the catalytic reduction of bromate to bromide using hydrogen as a reducing agent. In this review, we analyze the research published about this catalytic technology. Specifically, we summarize and discuss about the state of knowledge related to (1) the different metals used as catalysts for the reaction; (2) the influence of the support on the catalytic activity; (3) the characterization of the catalysts; (4) the reaction mechanisms; and (5) the influence of the water composition in the catalytic activity and in the catalyst stability. Based on published papers, we analyze the strength and weaknesses of this technique and the possibilities of using this reaction for the treatment of bromate-polluted water as a sustainable process.
Highlights
Environmental catalysis is a sustainable and valuable tool for the control of different pollutants
The final aim of this study is to stablish the necessary characteristics to design an active catalyst for the bromate hydrogenation reaction
From the review of the literature, it can be concluded that mainly noble metals (Pd or Pt) are necessary to design active catalysts as they are able to activate hydrogen at room temperature and atmospheric pressure
Summary
Environmental catalysis is a sustainable and valuable tool for the control of different pollutants. Chen et al [61] first reported the use of this reaction for the treatment of bromatepolluted water using noble metal catalysts that activate hydrogen at room temperature and atmospheric pressure. They obtained promising results highlighting the potential of this catalytic reaction as an effective approach to eliminate bromate contamination in drinking water. After this pioneering work, different scientific studies were published employing diverse catalysts for this reaction. We analyze many of them in terms of (1) the different metals used as catalytic active species; (2) the influence of the support on the catalytic activity; (3) the most relevant characterization of the catalysts; (4) the mechanisms proposed for the reaction; and (5) the influence of the water composition in the catalytic behavior and the stability of the materials
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
