Aqueous tetracycline degradation by H2O2 alone: Removal and transformation pathway

Chen, Y.; Ma, Yulong; Jin, Yang; Wang, Yu; Lv, Junmin; Ren, Cui-Juan

doi:10.1016/j.cej.2016.08.046

Cited by 264 publications

(49 citation statements)

References 22 publications

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“…The predominant five flow peaks can be found at retention time of 1.31, 1.87, 2.08, 2.21 and 2.62 minutes, corresponding to five degradation intermediates with m/z value of 397, 381, 415, 358 and 274, respectively. By combining the identified intermediates and previous studies, a possible pathway of TC decomposition was proposed as illustrated in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…Tetracyclines (TCs), a group of broad‐spectrum antibiotics, are widely used as pharmaceuticals and feed additives owing to their high antimicrobial activity and low cost . TC was found to be present in surface water, ground water, drinking water and soil at the level of μg L −1 . The TC residues may promote the appearance of resistant bacterial strains, which has become a threat to human health and ecological environment .…”

Section: Introductionmentioning

confidence: 99%

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Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

Luo

Xie

Niu

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Tetracycline (TC) residues in water and soil have received wide attention due to their adverse effects on human health and ecosystem. Layer-structured biogenic manganese oxides (BMOs) could be obtained from fungi Pleosporales sp. Y-5 culture. Cobalt doping into BMOs (Co-BMOs) was conducted by a facile impregnation-calcination method to eliminate TC residues through activation of peroxymonosulfate (PMS). RESULTS: TheTC in aqueous solution could be nearly completely removed in about 10 minutes under the optimal condition ([TC] = 50 mg L −1 , [catalyst] = 0.2 g L −1 , [PMS] = 0.4 g L −1 , 25 ∘ C). The electron paramagnetic resonance (EPR) identified the coexistence of SO 4 − • and OH• during PMS activation. The Co-BMOs catalyst remained great catalytic activity after five runs. Possible mechanism of PMS activation and TC degradation pathway were proposed. Preliminary biological toxicity test using green algae Chlorella vulgaris (FACHB-8) as ecological indicator confirmed that TC degradation solution was less toxic than the original solution. CONCLUSION: This study demonstrated high catalytic activity and stability of Co-BMOs for degradation of TC by PMS activation. The Co-BMOs/PMS system is helpful in new efforts for TC degradation without generation of more toxic intermediates. Industry 0.4 g L −1 PMS followed by adjustment of pH to 7.0. Then the Chlorella vulgaris was treated with 50 mL fresh TC solution and degraded solution, respectively. Cultures were incubated on an orbital shaker (180 rpm, 30 ∘ C) for 120 hours. The concentration J Chem Technol Biotechnol 2019; 94: 752-760

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

Luo

Xie

Niu

et al. 2018

J of Chemical Tech & Biotech

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“…Whereas, the poor absorption and low metabolic rate of TC by humans and animals lead to a discharge of a large amount of TC in the original form or metabolites into the environment [3,4]. Hence, extraction or degradation of TC is a critical issue for water control, environmental protection, and methods such as adsorption, biological treatment, photocatalysis, and more have been proposed [5][6][7][8]. Biodegradation is quite promising because organic matters can be converted into inorganic molecules by certain bacteria, but the process is time consuming [9].…”

Section: Introductionmentioning

confidence: 99%

Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

Feng

Wei

et al. 2020

Nanomaterials

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A recyclable photoelectrode with high degradation capability for organic pollutants is crucial for environmental protection and, in this work, a novel CeO2 quantum dot (QDs)/Ag2Se Z-scheme photoelectrode boasting increased visible light absorption and fast separation and transfer of photo-induced carriers is prepared and demonstrated. A higher voltage increases the photocurrent and 95.8% of tetracycline (TC) is degraded by 10% CeO2 QDs/Ag2Se in 75 minutes. The degradation rate is superior to that achieved by photocatalysis (92.3% of TC in 90 min) or electrocatalysis (27.7% of TC in 90 min). Oxygen vacancies on the CeO2 QDs advance the separation and transfer of photogenerated carriers at the interfacial region. Free radical capture tests demonstrate that •O2−, •OH, and h+ are the principal active substances and, by also considering the bandgaps of CeO2 QDs and Ag2Se, the photocatalytic mechanism of CeO2 QDs/Ag2Se abides by the Z-scheme rather than the traditional heterojunction scheme. A small amount of metallic Ag formed in the photocatalysis process can form a high-speed charge transfer nano channel, which can greatly inhibit the photogenerated carrier recombination, improve the photocatalytic performance, and help form a steady Z-scheme photocatalysis system. This study would lay a foundation for the design of a Z-scheme solar photocatalytic system.

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“…have attracted scientific interest for their ability to completely destroy pharmaceuticals . According to the work of Chen et al . TC can be efficiently removed only by the addition of hydrogen peroxide in alkaline solutions (i.e in the absence of iron).…”

Section: Introductionmentioning

confidence: 99%

The role of operating parameters and irradiation on the electrochemical degradation of tetracycline on boron doped diamond anode in environmentally relevant matrices

Frontistis

Meriç

2018

J of Chemical Tech & Biotech

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BACKGROUND: Nowadays, due to the inappropriate use of antibiotics, significant quantities have been detected in environmental samples. Therefore there is a need for a technology to eliminate the accumulation of pharmaceuticals in receiving water bodies. In recent years electrochemical oxidation showed superior efficiency for the purification of water from pharmaceuticals. RESULTS: boron doped diamond (BDD) showed better efficiency than platinum electrode and stainless steel for the degradation of 500 g L−1 tetracycline (TC) with 0.1 mol L −1 ·Na 2 SO 4 . The presence of 200 mg L −1 bicarbonates decreased the apparent kinetic constant from 0.328 to 0212 min −1 . Instead, the addition of 200 mg L −1 NaCl increased the kinetic constant by almost four times, while the presence of 10 mg L −1 of humic acid decreased the kinetic constant by 18%. The process was favored in real environmental matrices like bottled water and wastewater in comparison with ultrapure water. The use of BDD as both anode and cathode enhanced the efficiency by almost 20%. The presence of UVA or solar radiation increased the decomposition of tetracycline by 14%. Changes in toxicity to Vibrio fisheri bacteria during treatment of TC in the secondary effluent are mainly attributed to the formation of intermediates of the water matrix itself and does not follow the TC removal. CONCLUSIONS: Electrochemical oxidation was favored for removal of TC in real water matrices due to the presence of chlorides. The use of BDD as both anode and cathode with simultaneous solar irradiation is a promising technology for water remediation from TC.

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Aqueous tetracycline degradation by H2O2 alone: Removal and transformation pathway

Cited by 264 publications

References 22 publications

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

The role of operating parameters and irradiation on the electrochemical degradation of tetracycline on boron doped diamond anode in environmentally relevant matrices

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