The biochar-supported iron-copper bimetallic composite activating oxygen system for simultaneous adsorption and degradation of tetracycline

Liu, Jiale; Luo, Kui; Li, Xiaoming; Yang, Qi; Wang, Dongbo; Wu, You; Chen, Zhuo; Huang, Xiaoding; Pi, Zhoujie; Du, Wenjie; Guan, Zhiling

doi:10.1016/j.cej.2020.126039

Cited by 98 publications

(20 citation statements)

References 48 publications

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“…It showed that Fe 3+ and Fe 2+ were 61.7% and 38.3% before the reaction, respectively, and Fe 3+ and Fe 2+ were 49.2% and 50.8% after the reaction. Therefore, it can be seen that 12.5% of Fe 3+ was As shown in Figure 2c, the nitrogen adsorption-desorption isotherm of MBC showed the phenomenon of adsorption lag in the middle segment, which conformed to the characteristic of IV isotherm [30]. The average pore diameter of MBC was below 10 nm (Figure 2d).…”

Section: Xps Analysismentioning

confidence: 63%

Section: The Possible Removal Mechanismmentioning

confidence: 98%

“…The carbon base acted as a medium for electron transfer from CIP (electron donor) to H2O2 (electron acceptor) [59]. Meanwhile, in the O1s XPS spectra (Figure 3c), the decrease in Fe-O/Cu-O from 55% to 52.4% showed that the electron transfer of iron and copper also contributed to the degradation of CIP [30]. It was generally accepted that hydrogen peroxide was activated by the catalyst to produce the surface-bound hydroxyl radicals (on catalyst surface) (•OH surf ) to degrade the CIP.…”

Section: Determination Of Free Radicals In the Degradation Processmentioning

confidence: 99%

“…The desorption experiments were performed to study the contribution of adsorption and catalytic oxidation on the removal of CIP. After 360 min of the reaction in the MBC/H 2 O 2 condition, the catalyst was separated by an external magnetic field, and then 0.1 M NaOH solution was used as the desorption experiment for 24 h [30]. In the end, the absorbance was measured to obtain the adsorption efficiency.…”

Section: The Contribution Of Adsorption and Degradationmentioning

confidence: 99%

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Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Liu

et al. 2022

Nanomaterials

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An economical corncob biochar-based magnetic iron–copper bimetallic nanomaterial (marked as MBC) was successfully synthesized and optimized through a co-precipitation and pyrolysis method. It was successfully used to activate H2O2 to remove ciprofloxacin (CIP) from aqueous solutions. This material had high catalytic activity and structural stability. Additionally, it had good magnetic properties, which can be easily separated from solutions. In MBC/H2O2, the removal efficiency of CIP was 93.6% within 360 min at optimal reaction conditions. The conversion of total organic carbon (TOC) reached 51.0% under the same situation. The desorption experiments concluded that adsorption and catalytic oxidation accounted for 34% and 66% on the removal efficiency of CIP, respectively. The influences of several reaction parameters were systematically evaluated on the catalytic activity of MBC. OH was proved to play a significant role in the removal of CIP through electron paramagnetic resonance (EPR) analysis and a free radical quenching experiment. Additionally, such outstanding removal efficiency can be attributed to the excellent electronic conductivity of MBC, as well as the redox cycle reaction between iron and copper ions, which achieved the continuous generation of hydroxyl radicals. Integrating HPLC-MS, ion chromatography and density functional theory (DFT) calculation results, and possible degradation of the pathways of the removal of CIP were also thoroughly discussed. These results provided a theoretical basis and technical support for the removal of CIP in water.

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Section: Xps Analysismentioning

confidence: 63%

Section: The Possible Removal Mechanismmentioning

confidence: 98%

Section: Determination Of Free Radicals In the Degradation Processmentioning

confidence: 99%

Section: The Contribution Of Adsorption and Degradationmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Liu

et al. 2022

Nanomaterials

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“…Biochar was used for environmental remediation and received extensive attention in regards to the removal of organic pollutants in water [58,108,109]. To achieve an easy separation in application, magnetic biochar has been extensively studied.…”

Section: Biochar-based Mcsmentioning

confidence: 99%

Application of Magnetic Composites in Removal of Tetracycline through Adsorption and Advanced Oxidation Processes (AOPs): A Review

et al. 2021

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Water pollution induced by the tetracycline (TC) has caused global increasing attention owing to its extensive use, environmental persistence, and potential harm for human health. Adsorption and advanced oxidation processes (AOPs) have been promising techniques for TC removal due to ideal effectiveness and efficiency. Magnetic composites (MCs) which exploit the combined advantages of nano scale, alternative sources, easy preparation, and separation from wastewater are widely used for catalysis and adsorption. Herein, we intensively reviewed the available literature in order to provide comprehensive insight into the applications and mechanisms of MCs for removal of TC by adsorption and AOPs. The synthesis methods of MCs, the TC adsorption, and removal mechanisms are fully discussed. MCs serve as efficient adsorbents and photocatalysts with superior performance of photocatalytic performance in TC degradation. In addition, the TC can be effectively decomposed by the Fenton-based and SO4•− mediated oxidation under catalysis of the reported MCs with excellent catalytic performance. Based on the existing literature, we further discuss the challenge and future perspectives in MCs-based adsorption and AOPs in removing TC.

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Application of Biochar for Wastewater Treatment

Abd-Elhamid

Emran

2021

Biochar and Its Application in Bioremediation

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The biochar-supported iron-copper bimetallic composite activating oxygen system for simultaneous adsorption and degradation of tetracycline

Cited by 98 publications

References 48 publications

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Application of Magnetic Composites in Removal of Tetracycline through Adsorption and Advanced Oxidation Processes (AOPs): A Review

Application of Biochar for Wastewater Treatment

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