A new catalyst CHCP-Fe2O3 for enhanced removal of tetracycline through the Fenton-like process: Economical synthesis, catalytic performance, and practicability

He, Jing; Pei, Baoyou; Deng, Chenglong; Huang, Dongha; Lv, Bihong; Peng, Cheng; Luo, Geng‐Geng; Lin, JinQing

doi:10.1016/j.jwpe.2022.103481

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…However, the degradation rate of TC slightly decreased when the initial concentration of H 2 O 2 was increased to 7%. The excessive amounts of H 2 O 2 may have some side reactions with ·OH, such as those shown in Equations (2) and (3) [ 32 , 55 , 56 ]. The formation of either ·HO 2 with a weak oxidizing capacity or O 2 with no oxidizing properties can decrease the overall TC degradation rate [ 29 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Activated Carbon-Reinforced Composite Beads Based on MnO2/MCM-41@Fe3O4 and Calcium Alginate for Efficient Removal of Tetracycline in Aqueous Solutions

Zheng,

Shi,

Zhang

et al. 2024

Polymers

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Tetracycline (TC) is a common antibiotic; when untreated TC enters the environment, it will cause a negative impact on the human body through the food chain. In the present study, MnO2/MCM-41@Fe3O4 (FeMnMCM) prepared using a hydrothermal and redox method and Camellia oleifera shell-activated carbon (COFAC) prepared through alkali activation were encapsulated using alginate (ALG) and calcium chloride as a cross-linking matrix to give the composite beads COFAC–FeMnMCM–ALG. The resultant COFAC–FeMnMCM–ALG composite beads were then carefully characterized, showing a high immobilization of MnO2/MCM-41@Fe3O4, with porous COFAC as an effective bioadsorbent for enriching the pollutants in the treated samples. These bead catalysts were subsequently applied to the oxidative degradation of TC in a Fenton oxidation system. Several parameters affecting the degradation were investigated, including the H2O2 concentration, catalyst dosage, initial TC concentration, and temperature. A very high catalytic activity towards the degradation of TC was demonstrated. The electron paramagnetic resonance (EPR) and quenching results showed that ·OH and ·O2− were generated in the system, with ·OH as the main radical species. In addition, the COFAC–FeMnMCM–ALG catalyst exhibited excellent recyclability/reusability. We conclude that the as-prepared COFAC–FeMnMCM–ALG composite beads, which integrate MnO2 and Fe3O4 with bioadsorbents, provide a new idea for the design of catalysts for advanced oxidation processes (AOPs) and have great potential in the Fenton oxidation system to degrade toxic pollutants.

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