Modeling of heterogeneous fenton process using catalyst produced from date palm waste for dye removal: Catalyst characterization and process optimization

Moslemi Faeze,Ehrampoush Mohammad Hassan,Mehralian Mohammad,Dalvand Arash 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.11

This study evaluated the efficiency of the heterogeneous Fenton process using magnetic activated carbon catalyst produced from date palm waste in removing direct dye from aqueous solutions. The experimental runs and optimal conditions for the effect of contact time, solution pH, catalyst dose, and persulfate dose were determined based on the Box-Behnken design under response surface methodology (RSM). FTIR, FESEM, XRD, EDS, BET, and VSM analyses were used to investigate the characteristics of the catalyst. The analysis of variance (ANOVA) verified that the selected statistical model with R2 0.95, p-value<0.0001, and F-value 58.67 was significant. The results of optimal conditions showed that at a dye concentration of 50 mg/L, catalyst dose 0.96 g/L, persulfate dose 9.7 mM, pH 7 and contact time 84 min, maximum removal efficiency of DR80, DB80, DBw103 and COD was 92.69, 97.07, 73.85, and 60%, respectively. After five cycles of catalyst regeneration, the results showed that the catalyst could be utilized several times effectively for dye removal.

LiFePO ₄ microcrystals as an efficient heterogeneous Fenton-like catalyst in degradation of rhodamine 6G

Li, Zhan Jun,Ali, Ghafar,Kim, Hyun Jin,Yoo, Seong Ho,Cho, Sung Oh Springer 2014 NANOSCALE RESEARCH LETTERS Vol.9 No.1

<P>We present a novel heterogeneous Fenton-like catalyst of LiFePO<SUB>4</SUB> (LFP). LFP has been widely used as an electrode material of a lithium ion battery, but we observed that commercial LFP (LFP-C) could act as a good Fenton-like catalyst to decompose rhodamine 6G. The catalytic activity of LFP-C microparticles was much higher than a popular catalyst, magnetite nanoparticles. Furthermore, we found that the catalytic activity of LFP-C could be further increased by increasing the specific surface area. The reaction rate constant of the hydrothermally synthesized LFP microcrystals (LFP-H) is at least 18 times higher than that of magnetite nanoparticles even though the particle size of LFP is far larger than magnetite nanoparticles. The LFP catalysts also exhibited a good recycling behavior and high stability under an oxidizing environment. The effects of the experimental parameters such as the concentration of the catalysts, pH, and the concentration of hydrogen peroxide on the catalytic activity of LFP were also analyzed.</P>

Efficient degradation of azo dye by dual-doped photo-enhanced Fentonlike catalysts in magnetic suspension reactor

Ting Dai,Chang Li,Ning Wang,Li Yu,Meng Zhang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-

Fenton-like catalysts have sparked enormous interest from academic to industrial fields because of theirexcellent degradability and offered a promising platform for the effective treatment of wastewater. However, it remains a grand challenge to balance their catalytic performance and corrosion resistancefor industrial application. To address this issue, we report Cr and C dual-doped photo-enhancedFenton-like catalysts (Cr, C-FeSiB) in which Cr functions as a corrosion inhibitor to improve recycling performanceand C acts as an electron transfer accelerator to raise the cycle efficiency of iron ions duringcomplex Fenton-like reactions. Moreover, we design a low energy-consumption magnetic-suspensionlikereactor in which Fenton-like catalysts can work as micro-scaled stirrers to enhance the mass transferefficiency during the Fenton-like reactions owing to their soft magnetic property.

Degradation of Phenol with Fenton-like Treatment by Using Heterogeneous Catalyst (Modified Iron Oxide) and Hydrogen Peroxide

Lee, Si-hoon,Oh, Joo-yub,Park, Yoon-chang Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.4

Goethite, hematite, magnetite and synthesized iron oxide are used as catalysts for Fenton-type oxidation of phenol. The synthesized iron oxides were characterized by X-ray diffraction (XRD), BET, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR). The catalytic activity of these materials is classified according to the observed rate of phenol oxidation. The effectiveness of the catalysts followed the sequence: ferrous ion > synthesized iron oxide >> magnetite hematite > goethite. According to these results, the most effective iron oxide catalyst had the structure similar to natural hematite. The surface oxidation state of the catalyst was between magnetite and hematite (+2.5 ~ +3.0). Phenol degraded completely in 40 min at neutral pH (pH = 7). Soluble ferric and ferrous ions were not detected in the filtrate from Fenton reaction solution by AAS. The formation of hydroxyl radicals was confirmed by EPR.

Role of sol with iron oxyhydroxide/sodium dodecyl sulfate composites on Fenton oxidation of sorbed phenanthrene in sand

Park, J.Y.,Kim, J.H. Academic Press 2013 Journal of environmental management Vol.126 No.-

In situ Fenton oxidation has been recently used to oxidize sorbed organic contaminants in soil. The objective of present contribution was to study the role of sodium dodecyl sulfate (SDS) as anionic surfactant and sol with iron oxyhydroxide/SDS for Fenton oxidation of sorbed phenanthrene in sand. The most effective experimental condition for phenanthrene oxidation was the Fenton-like reaction system with 0.35% H<SUB>2</SUB>O<SUB>2</SUB>, 30 mM SDS, and 4 mM FeCl<SUB>2</SUB>. The Fenton-like reactions under these experimental conditions resulted in the production and sustenance of a stable sol with iron oxyhydroxide/SDS composites over 24 h. The formation of iron oxyhydroxide/SDS composites resulted in stabilization of H<SUB>2</SUB>O<SUB>2</SUB>, and then the Fenton-like reactions were sustained over 24 h. Furthermore, the sol of iron oxyhydroxide/SDS composites gave suitable sites to sustain oxidations of dissolved phenanthrene over a prolonged reaction span, which is required for in situ chemical oxidation.

Removal of Eriochrome Black T by sulfate radical generated from Fe-impregnated biochar/persulfate in Fenton-like reaction

박종환,Jim J. Wang,Negar Tafti,Ronald D. Delaune 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.71 No.-

A new heterogeneous Fenton catalyst, Fe-impregnated biochar catalyst (Fe-BC) was synthesized andevaluated in detail for its catalytic activity with sulfate radical under various conditions. The optimumconditions for the removal of Eriochrome Black T (EBT) by Fe-BC were determined as 0.27 g/L K2S2O8 (PS)and 0.5 g/L Fe-BC for 0.1 g/L EBT, and which resulted 85–88% removal efficiency within 2 h. The effectiveoxidation of EBT was observed over a pH range of 2–4 and temperature of 25–45 C and maintained EBTremoval efficiency of 77.6–92.7%. Under optimum conditions, the catalytic activity was faster in the orderof PS > PS + HP > H2O2 (HP) >>Fe-BC (without oxidants). The catalytic activity of Fe-BC for EBT can beidentified in two stages, which occur rapidly within 30 min (1st stage) and followed by slow oxidationuntil 120 min (2nd stage). Catalytic activity by sulfate radical was also dominantly influenced by otherpollutant such as iodide, phosphate and humic acid. Overall, the sulfate radical generated from Fe-BC/PSwas found more economical with strong oxidation efficiency for use in Fenton-like reaction for treatingorganic pollutants compared with conventional Fenton reaction with H2O2.

Iron-loaded Natural Clay as Heterogeneous Catalyst for Fenton-like Discoloration of Dyeing Wastewater

Xu, Huan-Yan,Ha, Xiu-Lan,Wu, Ze,Shan, Lian-Wei,Zhang, Wei-Dong Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.10

The clay-based Fe-bearing catalyst was successfully prepared through ion-exchange reaction and applied as heterogeneous catalyst for discoloration of acid fuchsine (AF) in an aqueous solution by Fenton-like reaction. Experimental results demonstrated that the AF discoloration ratios increased by increasing Fe-loaded clay dosage and initial $H_2O_2$ concentration, and by decreasing the pH, respectively. The lower the initial AF concentration, the shorter the reaction time needed to achieve complete discoloration of AF. Comparative studies indicated that AF discoloration ratios were much higher in presence of Fe-loaded clay and $H_2O_2$ than those in presence of $H_2O_2$, raw natural clay or Fe-loaded clay only and raw natural clay and $H_2O_2$ jointly. After AF discoloration, there existed no new phases in the clay samples detected by XRD and no change in the clay crystal morphology observed by SEM. A mechanism proposed suggested adsorption and Fenton-like reaction were responsible for discoloration of AF.

Iron-loaded Natural Clay as Heterogeneous Catalyst for Fenton-like Discoloration of Dyeing Wastewater

Huan-Yan Xu,Xiu-Lan He,Ze Wu,Lian-Wei Shan,Wei-Dong Zhang 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.10

The clay-based Fe-bearing catalyst was successfully prepared through ion-exchange reaction and applied as heterogeneous catalyst for discoloration of acid fuchsine (AF) in an aqueous solution by Fenton-like action.Experimental results demonstrated that the AF discoloration ratios increased by increasing Fe-loaded clay dosage and initial H2O2 concentration, and by decreasing the pH, respectively. The lower the initial AF concentration, the shorter the reaction time needed to achieve complete discoloration of AF. Comparative studies indicated that AF discoloration ratios were much higher in presence of Fe-loaded clay and H2O2 than those in presence of H2O2, raw natural clay or Fe-loaded clay only and raw natural clay and H2O2 jointly. After AF discoloration, there existed no new phases in the clay samples detected by XRD and no change in the clay crystal morphology observed by SEM. A mechanism proposed suggested adsorption and Fenton-like reaction were responsible for discoloration of AF.

Degradation of Phenol with Fenton-like Treatment by Using Heterogeneous Catalyst (Modified Iron Oxide) and Hydrogen Peroxide

Sihoon Lee,Jooyub Oh,Yoonchang Park* 대한화학회 2006 Bulletin of the Korean Chemical Society Vol.27 No.4

Reduced graphene oxide-loaded-magnetite: A Fenton-like heterogeneous catalyst for photocatalytic degradation of 2-methylisoborneol

Moztahida, Mokrema,Nawaz, Mohsin,Kim, Jiho,Shahzad, Asif,Kim, Seonghun,Jang, Jiseon,Lee, Dae Sung Elsevier 2019 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.370 No.-

<P><B>Abstract</B></P> <P>A reduced-graphene-oxide-loaded magnetite (rGOF) composite was successfully synthesized by co-precipitation method for photocatalytic degradation of an odorous water contaminant 2-methylisoborneol (MIB). This heterogeneous Fenton-like catalyst degraded the recalcitrant MIB under both UV and solar light irradiations at neutral pH without the addition of other chemicals. Bare magnetite (Fe<SUB>3</SUB>O<SUB>4</SUB>) degraded only 22.5% of MIB because of rapid charge recombination. In comparison, the degradation efficiency increased to 99% for 10% (by weight) reduced graphene oxide (rGO) loading in magnetite. The addition of the rGO not only increased the adsorption capacity by increasing surface area but also increased the photodegradation efficiency synergistically by separating the electron–hole pairs, indicated by the photoluminescence spectra. The reduction in aggregation of Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles was explained by the increase in d-spacing and with FE-SEM images. The impedance and photocurrent data also proved the transfer of electron in presence of light in the hybrid composite. The rGOF composite presented excellent ferromagnetism, which made its recovery very easy. The recycled composite showed significantly high photocatalytic activity even after the fifth cycle with increased adsorption capacity of the recycled composite. Degradation mechanism and degradation pathway have been proposed and intermediates were identified.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A Fenton-like composite (rGOF) was synthesized by co-precipitation. </LI> <LI> rGOF degraded 2-methylisoborneol (MIB) under both UV and visible light. </LI> <LI> rGO loading in Fe<SUB>3</SUB>O<SUB>4</SUB> enhanced the photodegradation of MIB. </LI> <LI> A loading of 10 wt% rGO (rGOF-10) was optimum. </LI> <LI> rGOF composite showed great reusability up to five cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>