Engineered mesoporous biochar derived from rice husk for efficient removal of malachite green from wastewaters

Tsai, Chen-Yu; Lin, Pei‐Ying; Hsieh, Shu‐Ling; Kirankumar, Rajendranath; Patel, Anil Kumar; Singhania, Reeta Rani; Dong, Cheng–Di; Chen, Chiu-Wen; Hsieh, Shuchen

doi:10.1016/j.biortech.2022.126749

Cited by 74 publications

(24 citation statements)

References 43 publications

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“…Peaks were identified at 2Ɵ values of 32.53°, 35.55°, 38.75°, 48.70°, 58.33°, 65.80°, 66.48°, 68.15°, and 75.28°, respectively, correlating to the crystallographic planes (110), (1̅11), (111), (2̅02), (202), (022), (310), (220), and (2̅22) of CuO nanomaterial 37 . These peaks were coherent with the monoclinic system with an end-centered lattice structure of CuO nanomaterial, as well as the results matched with the previously reported literature (JCPDS 89–5899) presenting the cell parameters of the monoclinic CuO with the space group of Cc 9 , are a = 4.689 Å, b = 3.420 Å, c = 5.130 Å, and β = 99.57° 38 , 39 . Peaks were observed at 2Ɵ values of 18.01°, 28.9°, 31.0°, 32.3°, 36.1°, 44.4°, 58.5°, and 63.2° corresponding to diffraction planes of (101), (112), (200), (103), (211), (220), (321), and (116), respectively and these peaks were consistent with the tetragonal system with body-centered lattice structure of Mn 3 O 4 nanomaterial, and the data best fit with the earlier reported JCPDS file number 89–4837 40 , 41 .…”

Section: Resultssupporting

confidence: 90%

Bandgap engineering approach for designing CuO/Mn3O4/CeO2 heterojunction as a novel photocatalyst for AOP-assisted degradation of Malachite green dye

Gupta

Kulkarni

Ahmaruzzaman

2023

Sci Rep

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A ternary nanohybrid CuO/Mn3O4/CeO2 was developed in the present work using a co-precipitation-assisted hydrothermal method. The designed photocatalyst's structural, morphology, elemental composition, electronic states of elements, and optical properties were studied using corresponding analytical techniques. Results from PXRD, TEM/HRTEM, XPS, EDAX, and PL showed that the desired nanostructure had formed. Using Tauc's energy band gap plot, it was determined that the nanostructures band gap was ~ 2.44 eV, which showed the band margins of the various moieties, CeO2, Mn3O4, and CuO, had modified. Thus, improved redox conditions led to a substantial decrease in the recombination rate of electron–hole pairs, which was further explained by a PL study in that charge separation plays a key role. Under exposure to visible light irradiation for 60 min, it was revealed that the photocatalyst achieved 98.98% of photodegradation efficiency for malachite green (MG) dye. The process of photodegradation proceeded according to a pseudo-first-order reaction kinetic model with an excellent rate of reaction of 0.07295 min−1 with R2 = 0.99144. The impacts of different reaction variables, inorganic salts, and water matrices were investigated. This research seeks to create a ternary nanohybrid photocatalyst with high photostability, visible spectrum activity, and reusability up to four cycles.

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Section: Resultssupporting

confidence: 90%

Bandgap engineering approach for designing CuO/Mn3O4/CeO2 heterojunction as a novel photocatalyst for AOP-assisted degradation of Malachite green dye

Gupta

Kulkarni

Ahmaruzzaman

2023

Sci Rep

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“…It can be seen from Table S2 (Supplementary Material) that different biochars have different adsorption capacities for organic pollutants (MG and TH). According to the current data, the adsorption capacity of magnetic biochar BMFH/Fe 3 O 4 (171.26 mg/g) was slightly lower than that of BMFH (186.15 mg/g), but compared with most biochar adsorbents [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ], BMFH and BMFH/Fe 3 O 4 still showed good adsorption performance for the removal of MG and TH. We speculate that, despite their low surface area, their unique 3D network structure and rich surface chemistry may play a major role.…”

Section: Resultsmentioning

confidence: 83%

One-Step Carbonization Synthesis of Magnetic Biochar with 3D Network Structure and Its Application in Organic Pollutant Control

Chen

Lin

et al. 2022

IJMS

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In this study, a magnetic biochar with a unique 3D network structure was synthesized by using a simple and controllable method. In brief, the microbial filamentous fungus Trichoderma reesei was used as a template, and Fe3+ was added to the culture process, which resulted in uniform recombination through the bio-assembly property of fungal hyphae. Finally, magnetic biochar (BMFH/Fe3O4) was synthesized by controlling different heating conditions in a high temperature process. The adsorption and Fenton-like catalytic performance of BMFH/Fe3O4 were investigated by using the synthetic dye malachite green (MG) and the antibiotic tetracycline hydrochloride (TH) as organic pollutant models. The results showed that the adsorption capacity of BMFH/Fe3O4 for MG and TH was 158.2 and 171.26 mg/g, respectively, which was higher than that of most biochar adsorbents, and the Fenton-like catalytic degradation effect of organic pollutants was also better than that of most catalysts. This study provides a magnetic biochar with excellent performance, but more importantly, the method used can be effective in further improving the performance of biochar for better control of organic pollutants.

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“…Considering the chemical structure of MLG and CFXN ( Figure 1 ), electrostatic attraction plays a significant role in removing these pollutants [ 47 , 48 ]. At low pH, the auxochrome group of MLG (pKa = 10.3) is protonation, resulting in a positive charge density [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

Optimization, Nature, and Mechanism Investigations for the Adsorption of Ciprofloxacin and Malachite Green onto Carbon Nanoparticles Derived from Low-Cost Precursor via a Green Route

et al. 2022

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The spread of organic pollutants in water spoils the environment, and among the best-known sorbents for removing organic compounds are carbonaceous materials. Sunflower seed waste (SFSW) was employed as a green and low-cost precursor to prepare carbon nanoparticles (CNPs) via pyrolysis, followed by a ball-milling process. The CNPs were treated with a nitric–sulfuric acid mixture (1:1) at 100 °C. The scanning electron microscopy (SEM) showed a particle size range of 38 to 45 nm, and the Brunauer–Emmett–Teller (BET) surface area was 162.9 m2 g−1. The elemental analysis was performed using energy-dispersive X-ray spectroscopy, and the functional groups on the CNPs were examined with Fourier transform infrared spectroscopy. Additionally, an X-ray diffractometer was employed to test the phase crystallinity of the prepared CNPs. The fabricated CNPs were used to adsorb ciprofloxacin (CFXN) and malachite green (MLG) from water. The experimentally obtained adsorption capacities for CFXN and MLG were 103.6 and 182.4 mg g−1, respectively. The kinetic investigation implied that the adsorption of both pollutants fitted the pseudo-first-order model, and the intraparticle diffusion step controlled the process. The equilibrium findings for CFXN and MLG sorption on the CNPs followed the Langmuir and the Fredulich isotherm models, respectively. It was concluded that both pollutants spontaneously adsorbed on the CNPs, with physisorption being the likely mechanism. Additionally, the FTIR analysis of the adsorbed CFXN showed the disappearance of some functional groups, suggesting a chemisorption contribution. The CNPs showed an excellent performance in removing CFXN and MLG from groundwater and seawater samples and possessed consistent efficiency during the recycle–reuse study. The application of CNPs to treat synthetically contaminated natural water samples indicated the complete remediation of polluted water using the ball-mill-fabricated CNPs.

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Engineered mesoporous biochar derived from rice husk for efficient removal of malachite green from wastewaters

Cited by 74 publications

References 43 publications

Bandgap engineering approach for designing CuO/Mn3O4/CeO2 heterojunction as a novel photocatalyst for AOP-assisted degradation of Malachite green dye

Bandgap engineering approach for designing CuO/Mn3O4/CeO2 heterojunction as a novel photocatalyst for AOP-assisted degradation of Malachite green dye

One-Step Carbonization Synthesis of Magnetic Biochar with 3D Network Structure and Its Application in Organic Pollutant Control

Optimization, Nature, and Mechanism Investigations for the Adsorption of Ciprofloxacin and Malachite Green onto Carbon Nanoparticles Derived from Low-Cost Precursor via a Green Route

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