© 2020 Elsevier B.V. All rights reserved. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. This strategy provides a guidance to design efficient photocatalysts for selective catalytic oxidation. Initial persulfate was 1000 μM. This site needs JavaScript to work properly. Catalytic oxidation of benzene with ozone over alumina-supported manganese oxides was carried out at room temperature (295 K) to investigate the behavior of benzene oxidation and CO x formation. This work may serve as a guide in designing efficient photocatalysts for selective catalytic oxidation. Liu Y, Lang J, Wang T, Jawad A, Wang H, Khan A, Chen Z, Chen Z. Environ Sci Pollut Res Int. Mechanisms on the Impacts of Alkalinity, pH, and Chloride on Persulfate-Based Groundwater Remediation. Rates of production of SO4(•-) or hydroxyl radical (HO(•)) generated from radical chain reactions were affected by the concentration of benzene, with rates of S2O8(2-) decomposition increasing as the benzene concentration increased. Under conditions selected to minimize the loss of initial transformation products through reaction with radicals, the production of phenol only accounted for 30%-60% of the benzene lost in the presence of O2. Dissolved O 2 concentrations were measured as the reaction proceeded using a YSI Model 58 oxygen probe (YSI Inc., Yellow Springs, OH). To address these shortcomings, we assessed the stoichiometric efficiency and products of transition metal-catalyzed persulfate oxidation of benzene with pure iron- and manganese-containing minerals, clays, and aquifer solids. Oxidation of Benzene by Persulfate in the Presence of Fe(III)- and Mn(IV)-Containing Oxides: Stoichiometric Efficiency and Transformation Products. Sulfate … The evidence for direct oxidation of benzene by O2 was obtained using 18O and 2H isotopes. Copyright © 2004 Elsevier Inc. All rights reserved. 2017;7(5):1129-1140. doi: 10.1039/C6CY02355J. Generation of hydroxyl radicals from reactions between a dimethoxyhydroquinone and iron oxide nanoparticles. Minerals were present at 50 g/L, and pH was buffered at 8.0 with 50 mM borate. It deals with the combustion, hydrogenation and sulphonation of benzene and methylbenzene (toluene), and with the oxidation of side chains attached to benzene rings. Here, we report the FeCl3 and mesoporous carbon nitride hybrid (FeCl3/mpg-C3N4) as an active and selective photocatalyst to activate H2O2 for the oxidation of benzene … 2014 Sep 2;48(17):10330-6. doi: 10.1021/es502056d. Clipboard, Search History, and several other advanced features are temporarily unavailable. 2017 Nov 1;327:573-583. doi: 10.1016/j.cej.2017.06.128. Existing phenol production mostly by cumene processes is a three-step route with unwanted acetone as by-product. Copyright © 2020 Elsevier B.V. or its licensors or contributors. Liu H(1), Bruton TA, Li W(1), Buren JV, Prasse C, Doyle FM, Sedlak DL. Mn-based catalysts for sulfate radical-based advanced oxidation processes: A review. Water Res. Environ Sci Technol. Sulfate radical (SO4(•-)) is a strong, short-lived oxidant that is produced when persulfate (S2O8(2-)) reacts with transition metal oxides during in situ chemical oxidation (ISCO) of contaminated groundwater. USA.gov. Sulfate and oxygen are the final products of persulfate activation. https://doi.org/10.1016/j.cej.2020.124248. Selective oxidation benzene to phenol can be realized by using air as oxidant in H2O. Lyngsie G, Krumina L, Tunlid A, Persson P. Sci Rep. 2018 Jul 17;8(1):10834. doi: 10.1038/s41598-018-29075-5.  |  In the absence of O2, the concentration of the ring-cleavage product increased relative to phenol. Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. The high phenol selectivity of 87.18% can be obtained over Zn 2 Ti-LDH in water under light irridation.. The weakly bound compounds were removed by heat treatment at 573 K in the O2 flow. Pu M, Ma Y, Wan J, Wang Y, Wang J, Brusseau ML. The ratio of the decomposition rate for ozone to that for benzene was found to be 6, independent of ozone concentration, reaction times, and the amount of Mn loading. However, efficient controlling the selectivity of products and avoiding over-oxidation under mild conditions remain to be challenging. See this image and copyright information in PMC. The high phenol selectivity of 87.18% can be obtained over Zn2Ti-LDH in water under light irridation. ACS Omega. When present, benzene was 1000 μM. Environ Int. Carbon balance was in the range of 26–37% due to the formation of two types of intermediates, weakly bound compounds including formic acid and strongly bound surface formate and carboxylates. We use cookies to help provide and enhance our service and tailor content and ads. For most metal-containing solids, the stoichiometric efficiency, as determined by the loss of benzene relative to the loss of persulfate, approached the theoretical maximum. This strategy provides a guidance to design efficient photocatalysts for selective catalytic oxidation. Kinetics and efficiency of H2O2 activation by iron-containing minerals and aquifer materials. Catalyst was significantly deactivated due to the buildup of the intermediates on the catalyst surface during the course of benzene oxidation. NIH Epub 2017 Mar 17. Proposed radical chain reactions involving S. Environ Sci Technol. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Photocatalytic selective oxidation of benzene to phenol in water over layered double hydroxide: A thermodynamic and kinetic perspective. The mechanism was proposed on the basis of these results and … By continuing you agree to the use of cookies. Relationship between phenol concentration and the UV peak intensity of the unknown oxidation product. Changes of persulfate concentrations during…, Changes of persulfate concentrations during mineral-catalyzed activation. Initial [benzene]=1000 μM, initial [S, Impacts of dissolved oxygen concentration on the rate of (A) persulfate activation and (B) benzene degradation in the presence of persulfate and solids. 2018 Sep;25(26):26394-26404. doi: 10.1007/s11356-018-2637-3.  |   |  The strongly bound surface formate and carboxylates were oxidized to COx by further heating up to 723 K. The deactivated catalyst was regenerated by the heat treatment.