Adsorption performance of CuFe2O4/rGO nanocomposites towards organic dye

Tang, Manshu; Li, Xichuan; Gao, Chunjuan; Li, Xianxian; Qiu, H.

doi:10.1016/j.matchemphys.2016.10.012

Cited by 30 publications

(8 citation statements)

References 41 publications

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“…The above analysis clearly suggested that pseudo-first-order model can adequately fit the patulin adsorption onto WICF, which means that the sorption process appears to be controlled by diffusion step of adsorbate from the liquid phase to the adsorbent surface (Tang et al, 2016).…”

Section: Adsorption Kinetic Studiesmentioning

confidence: 78%

“…A series of solutions were shaken in a thermostatically controlled shaker under three different temperatures (4, 25, and 37 °C) for the required time intervals. According to Figure b, it was noted that the adsorption of patulin increased rapidly in the initial 5 hr and this period contributed 25.54, 55.30, and 69.03% to the removal rate at 4, 25, and 37 °C, which may be attributed to high initial concentration of patulin and the accessibility of abundant binding sites on WICF surface (Albadarin et al, ; Tang, Li, Gao, Li, & Qiu, ). Then removal efficiency slowed down, and for all temperatures, graphically, it is characterized by a plateau, achieving the adsorption equilibrium.…”

Section: Resultsmentioning

confidence: 97%

“…Similarly, the comparison made between the experimental adsorption capacity ( q e‐exp ) values and the calculated adsorption capacity ( q e‐cal ) values demonstrated that q e‐cal values agree well with q e‐exp values for the pseudo‐first‐order model. The above analysis clearly suggested that pseudo‐first‐order model can adequately fit the patulin adsorption onto WICF, which means that the sorption process appears to be controlled by diffusion step of adsorbate from the liquid phase to the adsorbent surface (Tang et al, ).…”

Section: Resultsmentioning

confidence: 98%

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Assessment of patulin adsorption efficacy from aqueous solution by water‐insoluble corn flour

Guo

Zhang

et al. 2017

Journal of Food Safety

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This study investigated water-insoluble corn flour (WICF) as a novel biosorbent for removing patulin from aqueous solutions, including contaminated fruit juices. Batch adsorption experiments were performed to assess the effect of granularity of WICF, adsorbent dosage, contact time, temperature, pH, and initial patulin concentration. The results showed that the maximum removal percentage of 92.21% was achieved at 37 8C, pH value of 4.0 in 100 mg/L patulin concentration for 25 hr. The adsorption data could be well fitted with the Freundlich isotherm model and the pseudo-first order model. Thermodynamic parameters indicated that mycotoxin adsorption is an endothermic and spontaneous process. Subsequently, scanning electron microscopy images showed obvious morphological changes in WICF after adsorbing patulin. Fourier transform infrared spectroscopy spectroscopic evidence demonstrated that the main functional groups involved in the adsorption were O-H, C 5 O and C-O groups. Practical applicationsPatulin was found as a contaminant in various fruit juices, which raised serious concerns about developing an effective and cheap adsorbent for detoxification of patulin toxin in fruit juice and their products. Water-insoluble corn flour was applied to strengthen the control of patulin for the first time. Results of this study indicated that water-insoluble corn flour has a strong ability to remove patulin from aqueous solutions and various fruit juices. Therefore, using water-insoluble corn flour as an adsorbent and combining the filtration process could be potentially applied in fruit juice industry for detoxification of patulin.

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Section: Adsorption Kinetic Studiesmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

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Assessment of patulin adsorption efficacy from aqueous solution by water‐insoluble corn flour

Guo

Zhang

et al. 2017

Journal of Food Safety

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“…As a continuation of the last study, this study focuses on the use of spinel copper ferrite (CuFe 2 O 4 ) for producing a novel magnetic biochar composite for enhanced removal ability of the heavy metal ions from the aqueous solutions. To date, CuFe 2 O 4 and its derived composites have been extensively used for the abatement of various pollutants such as organic dyes [ 27 , 28 , 29 , 30 , 31 ], anions [ 31 , 32 , 33 , 34 ], arsenic [ 31 , 35 , 36 ], heavy metal ions, and organic toxicants [ 30 , 31 , 37 , 38 ], thus, implying that CuFe 2 O 4 exhibits optimal properties for environmental applications. Therefore, introducing CuFe 2 O 4 modifier into biochar may reach the expected requirements for adsorbents such as good magnetic separability, good adsorption capacity, eco-friendly character, and low budget.…”

Section: Introductionmentioning

confidence: 99%

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Zhao

Cai

et al. 2020

Molecules

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A series of the magnetic CuFe2O4-loaded corncob biochar (CuFe2O4@CCBC) materials was obtained by combining the two-step impregnation of the corncob biochar with the pyrolysis of oxalate. CuFe2O4@CCBC and the pristine corncob biochar (CCBC) were characterized using XRD, SEM, VSM, BET, as well as pHZPC measurements. The results revealed that CuFe2O4 had a face-centered cubic crystalline phase and was homogeneously coated on the surface of CCBC. The as-prepared CuFe2O4@CCBC(5%) demonstrated a specific surface area of 74.98 m2·g−1, saturation magnetization of 5.75 emu·g−1 and pHZPC of 7.0. The adsorption dynamics and thermodynamic behavior of Pb(II) on CuFe2O4@CCBC and CCBC were investigated. The findings indicated that the pseudo-second kinetic and Langmuir equations suitably fitted the Pb(II) adsorption by CuFe2O4@CCBC or CCBC. At 30 °C and pH = 5.0, CuFe2O4@CCBC(5%) displayed an excellent performance in terms of the process rate and adsorption capacity towards Pb(II), for which the theoretical rate constant (k2) and maximum adsorption capacity (qm) were 7.68 × 10−3 g·mg−1··min−1 and 132.10 mg·g−1 separately, which were obviously higher than those of CCBC (4.38 × 10−3 g·mg−1·min−1 and 15.66 mg·g−1). The thermodynamic analyses exhibited that the adsorption reaction of the materials was endothermic and entropy-driven. The XPS and FTIR results revealed that the removal mechanism could be mainly attributed to the replacement of Pb2+ for H+ in Fe/Cu–OH and –COOH to form the inner surface complexes. Overall, the magnetic CuFe2O4-loaded biochar presents a high potential for use as an eco-friendly adsorbent to eliminate the heavy metals from the wastewater streams.

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“…Similarly, it has been previously reported that polysaccharides and peptidoglycans on the cell wall surface were the main components for the binding of mycotoxins [ 13 , 14 , 17 , 25 ]. The results of kinetic studies showed that the pseudo-first order adsorption kinetic model was a more suitable model for predicting the PAT adsorption reaction onto the HI cells and spores of A51, which suggests that the biosorption process is controlled by the diffusion process [ 28 , 29 ]. Moreover, Qiu et al [ 29 ] reported similar results: that the kinetics of PAT adsorption by nano-Fe 3 O 4 modified inactivated yeast followed a pseudo-first order adsorption kinetics model.…”

Section: Discussionmentioning

confidence: 99%

Effective Adsorption of Patulin from Apple Juice by Using Non-Cytotoxic Heat-Inactivated Cells and Spores of Alicyclobacillus Strains

Sajid

Mehmood

Niu

et al. 2018

Toxins

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Patulin (PAT) is a major threat to many food products, especially apple and apple products, causing human health risks and economic losses. The aim of this study was to remove PAT from apple juice by using the heat-inactivated (HI) cells and spores of seven Alicyclobacillus strains under controlled conditions. The HI cells and spores of seven strains adsorbed PAT effectively, and the HI cells and spores of Alicyclobacillus acidocaldarius DSM 451 (A51) showed maximum PAT adsorption capacity of up to 12.6 μg/g by HI cells and 11.8 μg/g by HI spores at 30 °C and pH 4.0 for 24 h. Moreover, the PAT adsorption process followed the pseudo-first order kinetic model and the Freundlich isotherm model; thermodynamic parameters revealed that PAT adsorption is a spontaneous exothermic physisorption process. The results also indicated that PAT adsorption is strain-specific. The HI cells and spores of Alicyclobacillus strains are non-cytotoxic, and the bioadsorption of PAT did not affect the quality of the juice. Furthermore, the cell wall surface plays an important role in the adsorption process.

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Adsorption performance of CuFe2O4/rGO nanocomposites towards organic dye

Cited by 30 publications

References 41 publications

Assessment of patulin adsorption efficacy from aqueous solution by water‐insoluble corn flour

Assessment of patulin adsorption efficacy from aqueous solution by water‐insoluble corn flour

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Effective Adsorption of Patulin from Apple Juice by Using Non-Cytotoxic Heat-Inactivated Cells and Spores of Alicyclobacillus Strains

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