Effect and mechanism analysis of MnO2 on permeable reactive barrier (PRB) system for the removal of tetracycline

Dong, Guihua; Huang, Lihui; Wu, Xueyuan; Wang, Chuang; Liu, Yangyang; Liu, Gaofeng; Wang, Lisha; Liu, Xiaowei; Xia, Haibing

doi:10.1016/j.chemosphere.2017.11.085

Cited by 65 publications

(16 citation statements)

References 37 publications

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“…It was indicated that MnO 2 NPs/ESM showed a prominent advantage over commercial MnO 2 powder under both conditions. Though removal efficiency of around 80% through MnO 2 decontamination was obtained in previous work [ 38 , 39 ], it could reach up to 98% under pH = 6.5 through a MnO 2 and zero-valent iron (ZVI)-based permeable reactive barrier (PRB) system [ 56 ], which was attributed to the multiple effects from ZVI coupling with MnO 2 . Besides, other materials were also applied to TC decontamination.…”

Section: Resultsmentioning

confidence: 99%

Eggshell Membrane-Templated MnO2 Nanoparticles: Facile Synthesis and Tetracycline Hydrochloride Decontamination

Wang

Tang

et al. 2018

Nanoscale Res Lett

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Taking advantages of reticular proteins and reductive groups on the surface, eggshell membrane (ESM) was selected to synthesize MnO2 nanoparticles from potassium permanganate through a super simple way in which ESM acted as both template and reductant. This process avoided harsh reaction conditions or complicated aftertreatments and thus owned the merits of green synthesis, handy operation, low cost, and easy purification. The ESM-templated MnO2 nanoparticles (MnO2 NPs/ESM) were characterized, and the content of nanomaterials on the template was tested. MnO2 NPs/ESM showed a good capacity for decontamination of tetracycline hydrochloride (TCH). The macroscopical materials can be separated easily by taking the membrane out to stop the degradation instead of centrifugation or filtration. It was studied that 72.27% of TCH (50 mg/L) was decontaminated in 20 min by 0.1920 g/L MnO2 nanoparticles, and removal efficiency could reach 83.10% after 60 min under buffered condition. The kinetics was studied with or without buffer, and it was concluded that the degradation process followed a pseudo-second-order model. The facile synthesis of materials and effective degradation would facilitate the nano-MnO2-based decontamination applications.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2679-y) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Eggshell Membrane-Templated MnO2 Nanoparticles: Facile Synthesis and Tetracycline Hydrochloride Decontamination

Wang

Tang

et al. 2018

Nanoscale Res Lett

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“…The I/I 0 of B,N-GQD in the presence of TC decrease from 0.254 at pH 3 to 0.146 at pH 5 and then gradually increases to 0.296 at pH 10, depicting the excellent quenching effect of TC on the fluorescence of B,N-GQDs at pH 5. It is noteworthy that the triprotonic acid and the dissociation constants (pKa) of tetracycline are 3.3, 7.7 and 9.7 [48], which means that TC will be deprotonated under the acid condition of pH 5. Since B atoms in GQD structures can serve as electron acceptor, the deprotonated TC acts as an electron donor to adsorb onto B,N-GQD surface, resulting in the significant quenching of the fluorescence produced from GQDs.…”

Section: Possible Sensing Mechanism For Tc Detection By B N-gqdsmentioning

confidence: 99%

Ultrasensitive Detection of Tetracycline Using Boron and Nitrogen Co-Doped Graphene Quantum Dots from Natural Carbon Source as the Paper-Based Nanosensing Probe in Difference Matrices

2020

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Herein, the boron and nitrogen co-doped 0-dimensional graphene quantum dots (B,N-GQDs) with high quantum yield (QY) were synthesized via microwave-assisted hydrothermal method at 170 °C for 20 min using fresh passion fruit juice and boric acid as the starting materials. The 3–6 layers of B,N-GQDs with mean particle size of 9 ± 1 nm were then used for ultra-sensitive and selective detection of tetracycline in aqueous and biological media. The hybridization of boron and nitrogen atoms into the GQD structures increases the intensity of electronegative, resulting in the enhancement of QY to 50 ± 1%. The B,N-GQDs show their excellent analytical performance on tetracycline determination after 2 min of reaction under an optimal condition at pH 5. The linear range of 0.04–70 µM and with limits of detection (LOD) of 1 nM in phosphate buffer saline (PBS), 1.9 nM in urine and 2.2 nM in human serum are obtained. Moreover, the high selectivity of tetracycline by B,N-GQDs over the other 23 interferences is observed. The π-π interaction and electron donor-acceptor principle play pivotal roles in enhancing the ultra-sensitivity and selectivity of B,N-GQDs toward TC detection. Moreover, the B, N-GQD based paper nanosensor exhibits an excellent analytical performance on visual detection of 0.1–30 µM TC in human serum. Results of this study clearly indicate the feasibility of synthesis of B,N-GQDs derived from passion fruit juice for ultrasensitive tetracycline detection, which can open an avenue to use natural products for the preparation of environmentally benign and biocompatible carbon nanomaterials for highly sensitive detection of drugs, antibiotics, organic compounds and biomarkers.

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“…There is an agreement on the MnO 2 enhancing decontamination effects in Fe 0 /H 2 O system, but reported disagreement on the actual operating mode of this system. Theoretically, MnO 2 can influence contaminant removal via adsorption, catalysis, and redox activities [14]. MnO 2 participates in oxidation of selected contaminants (e.g., aromatic amines, antibiotics).…”

Section: Introductionmentioning

confidence: 99%

“…Thereby, supplementary amounts of secondary adsorbents and reductants are generated for Cr VI removal and reduction. (iii) Dong et al [14] enhanced electron transfer "on the surface of Fe 0 with the presence of MnO 2 " in the process of tetracycline removal, yielding a more sustainable Fe 0 /H 2 O system to lengthen the lives of the Fe 0 filtration system. There is an urgent need to clarify the real operating mode of the Fe 0 /MnO 2 system.…”

Section: Introductionmentioning

confidence: 99%

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

Cao¹,

Alyoussef²,

Gatcha-Bandjun

et al. 2021

Processes

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The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One of the most promising approaches is the amendment with manganese dioxide (Fe0/MnO2 system). The resulting system is a very complex one where characterization is challenging. The present communication uses methylene blue discoloration (MB method) to characterize the Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. The initial MB concentration was 10 mg L−1 with the following mass loading: [MnO2] = 2.3 g L−1, [sand] = 45 g L−1, and 0 < [Fe0] (g L−1) ≤ 45. The following systems where investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, and Fe0/MnO2/sand. Results demonstrated that MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the test-tubes. Results confirm the complexity of the Fe0/MnO2/sand system, while establishing that both MnO2 and sand improve the efficiency of Fe0/H2O systems in the long-term. The mechanisms of water decontamination by amending Fe0-based systems with MnO2 is demonstrated by the MB method.

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Effect and mechanism analysis of MnO2 on permeable reactive barrier (PRB) system for the removal of tetracycline

Cited by 65 publications

References 37 publications

Eggshell Membrane-Templated MnO2 Nanoparticles: Facile Synthesis and Tetracycline Hydrochloride Decontamination

Eggshell Membrane-Templated MnO2 Nanoparticles: Facile Synthesis and Tetracycline Hydrochloride Decontamination

Ultrasensitive Detection of Tetracycline Using Boron and Nitrogen Co-Doped Graphene Quantum Dots from Natural Carbon Source as the Paper-Based Nanosensing Probe in Difference Matrices

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

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