High adsorption and high catalyst regeneration kinetics observed for Flyash-Fe3O4-Ag magnetic composite for efficient removal of industrial azo reactive dyes from aqueous solution via persulfate activation

Krishnamoorthy, Sriram; Ajala, F.; Mohammed, Shahansha; Asok, Adersh; Shukla, Satyajit

doi:10.1016/j.apsusc.2021.149265

Cited by 19 publications

(4 citation statements)

References 64 publications

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“…So XPS studied confirmed the presence of Fe3O4 in the composite. The peak Fe2p1/2 exhibits peak at 723.5 eV was allotted to Fe2O3 (Krishnamoorthy et al, 2021). After adsorption of Cr (VI) peaks shifted slightly to higher binding energy and appeared peaks represented at 709.0eV, 710.0, 711.1, 712.0 and 723.7eV was assigned to Fe 2+ such as FeCr2O4, Fe 3+ and Fe2O3 respectively as illustrated in Fig.…”

Section: Mechanism Behind Mitigation Of Cr (Vi)mentioning

confidence: 90%

Mitigation of Cr (VI) from aqueous solution using jute charcoal iron composite (JC-FeCs): Response surface methodology (RSM)

Kumari

Tiwary

Yadav

2022

Preprint

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In this study potential adsorbent jute charcoal iron composite (JC-FeCs) was synthesized via co precipitation of iron composite on jute charcoal and utilized it for Cr (VI) removal from water. The surface morphology of composite were performed with advance techniques such as BET, FESEM, EDX, FTIR, XPS, AFM and HR-TEM to analyzed the surface functional groups and elements on the prepared composite. The influence of pH, JC-FeCs dose, time, and concentration on % removal of Cr (VI) were examined. Noteworthy, the JC-FeCs reveals excellent removal capacity of Cr (VI) (Qmax 92.33 mg/g) at 303K which is much better than those adsorbent reported in the literature. XPS analysis of adsorbent shows the existence of both Cr (VI) and Cr (III) peaks on JC-FeCs surface, which implied that Cr (VI) adsorption occurs on composite. Herein Cr (VI) was first adsorbed on JC-FeCs via electrostatic force of attraction, later it was partially reduced to Cr (III). Non-linear isotherm study suggests monolayer adsorption occurs on homogenous surface of JC-FeCs adsorbent due to greater value of R2 than other isotherm. Kinetic studies suggest that adsorption followed pseudo second order model with greater R2 value. Thermodynamic study indicate endothermic, spontaneous and physisorption adsorption process. The predicted result of Cr (VI) removal obtains from RSM model and the observed % removal were found close to each other indicate that quadratic model best explain the adsorption process. Desorption study shows the good regeneration ability of adsorbent in alkaline medium. Thus, this bio-composite could work as an effective adsorbent for mitigation of Cr (VI) from water in environmental pollution cleanup.

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Section: Mechanism Behind Mitigation Of Cr (Vi)mentioning

confidence: 90%

Mitigation of Cr (VI) from aqueous solution using jute charcoal iron composite (JC-FeCs): Response surface methodology (RSM)

Kumari

Tiwary

Yadav

2022

Preprint

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Section: Application Of Aops For Dye-activated Saturated Carbon Regen...mentioning

confidence: 99%

“…Basically, AOPs generate reactive oxygen species (ROS) in situ , e.g., the superoxide (O 2 • ) and the hydroxyl (•OH) radicals, which are nonselective and highly oxidizing [ 70 , 79 , 90 , 91 ]. Techniques for generating the ROS include ultrasound cavitation, ozone, the Fenton, Fenton-like, UV/Fenton processes and various combinations of these [ 90 , 92 ]. The catalytic generation of ROS can be accomplished by the AC surface on its own, or by homogeneous or heterogeneous catalysis using Fenton reagents, which significantly enhance the production efficiency [ 91 ].…”

Section: Application Of Aops For Dye-activated Saturated Carbon Regen...mentioning

confidence: 99%

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Santos

Xiao

Chaukura

et al. 2022

Heliyon

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“… Sillanpää et al (2023) investigated the adsorption of Acid Orange 7 (AO7) by the Polypyrrole/nanosilica composite (PPN/SiO 2 ), by exploring various parameters. The successful degradation of industrial azo reactive dyes, including Corafix Red ME4B, Corazol Golden Yellow, and Corazol Black BX, has been demonstrated by Sriram Krishnamoorthy et al (2021) . This achievement was realized through the activation of persulfate (S 2 O 8 2− ) using Flyash (FA)-Fe 3 O 4 , FA-Fe 3 O 4 -Ag, and FA-Fe 3 O 4 -Ag-Cu magnetic composites as activators, showcasing their effectiveness in the dye degradation process.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver and iron nano composites using aqueous extract of zanthoxylum armatum seeds and their application for removal of acid black 234 dye

Bashir,

Gulzar,

Shad

2024

Front. Toxicol.

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Green nanotechnology has gained attraction in recent years due to the growing awareness of the environmental and health risks associated with traditional methods of nanomaterial synthesis. In the present study, nanocomposite (NCs) of silver and Iron were prepared using Zanthoxylum Armatum seeds aqueous extract which acts as a reducing, stabilizing, and capping agent. The synthesized NCs were characterized using UV/Vis Spectroscopy, powder X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and EDX. The UV/Vis spectroscopy analysis of the NCs revealed the presence of a surface plasmonic resonance band occurring at 420 nm. Examination of the NCs through SEM demonstrated that they exhibited a nearly spherical morphology, with an average particle diameter measuring 54.8 nm. The crystalline nature of these NCs was verified through X-ray diffraction (XRD), and the calculation of crystallite size using the Scherrer-Debye equation yielded a value of 12.6 nm. The adsorption ability of newly synthesized nanocomposites was investigated against Acid Black 234 Dye. The results showed that a 0.5 g of NCs dose at pH 4 removed 99.3% of 10 mg/L of Acid Black 234 Dye within 60 min. Based on the findings of this research, it can be inferred that the that Ag-Fe NCs synthesized from Zanthoxylum Armatum seeds aqueous extract hold significant potential for addressing environmental pollution caused by Acid Black 234 Dye. The NCs were used as adsorbent for the removal of Acid Black 234 dye from the wastewater sample and showed 98% removal of dye from the commercial sample within 60 min. In this context, the research highlights that the environmentally friendly synthesis of Ag-Fe nanocrystals (Ag-Fe NCs) using Zanthoxylum Armatum as a mediator offers an efficient and cost-effective solution for mitigating environmental pollution.

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High adsorption and high catalyst regeneration kinetics observed for Flyash-Fe3O4-Ag magnetic composite for efficient removal of industrial azo reactive dyes from aqueous solution via persulfate activation

Cited by 19 publications

References 64 publications

Mitigation of Cr (VI) from aqueous solution using jute charcoal iron composite (JC-FeCs): Response surface methodology (RSM)

Mitigation of Cr (VI) from aqueous solution using jute charcoal iron composite (JC-FeCs): Response surface methodology (RSM)

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Green synthesis of silver and iron nano composites using aqueous extract of zanthoxylum armatum seeds and their application for removal of acid black 234 dye

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