Study on the exothermic characteristics of Fe2+/H2O2 homogeneous Fenton degradation of o-phenylenediamine wastewater

Yan, Yuntao; Zhang, Ke; Mao, Yanpeng; Dong, Yong

doi:10.5004/dwt.2021.27345

Cited by 3 publications

(1 citation statement)

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“…Although the active site of Fe 2 O 3 @CSAC is inhibited by -OH, some of the H 2 O 2 molecules are still catalytically decomposed when adsorbed onto the surface of Fe 2 O 3 @CSAC; however, the amount of free radicals catalyzed is small as radical quenching [39] occurs before diffusion. Due to the quenching reaction, free radicals themselves also release heat [40], resulting in a local temperature increase on the Fe 2 O 3 @CSAC surface and the pores within, and this increase improves the molecular activity and diffusion rate. Although a higher -OH concentration reduces the probability of collision between H 2 O 2 molecules and the active site, the increase in molecular activity can also increase the number of collisions between the active site and H 2 O 2 molecules per unit of time.…”

Section: Effect Of Solution Phmentioning

confidence: 99%

Exothermic Reaction in the Cleaning of Wastewater by a Fe2O3/Coconut Shell Activated Carbon/H2O2 Heterogeneous Fenton-like System

Zhang,

Yan

2024

Sustainability

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Energy utilization in wastewater degradation has important implications for sustainability; however, efficient multiphase Fenton-like catalysts are still needed. In this study, a heterogeneous Fe2O3/coconut shell activated carbon (CSAC) Fenton-like catalyst was prepared and evaluated with respect to degradation performance and exothermic reaction for the treatment of organic wastewater. Fe2O3@CSAC retained the porous morphology of CSAS, and Fe2O3 was uniformly loaded on the surface of CSAS. In the reaction system, the degradation rate of wastewater was higher and a large amount of heat was released; therefore, it could be applied to the energy recovery from wastewater source heat pump technology. The degradation rate of 300 mL of o-phenylenediamine solution with a concentration of 0.04 mol·L−1 was 89.0% under 0.25 mol·L−1 H2O2, 532 g·L−1 Fe2O3@CSAC, pH 7.1, and an initial reaction temperature of 30 °C, elevated to 7.9 °C. These findings clearly demonstrate the degradation performance and exothermic laws of the Fe2O3@CSAC/H2O2 multiphase Fenton-like system.

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Section: Effect Of Solution Phmentioning

confidence: 99%