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Xu J, Zhang Y, Zhu X, Shen C, Liu S, Xiao Y, Fang Z. Direct evolution of an alkaline fungal laccase to degrade tetracyclines. Int J Biol Macromol 2024; 277:134534. [PMID: 39111464 DOI: 10.1016/j.ijbiomac.2024.134534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 04/06/2024] [Accepted: 08/04/2024] [Indexed: 08/13/2024]
Abstract
A fungal laccase-mediator system capable of high effectively oxidizing tetracyclines under a wide pH range will benefit environmental protection. This study reported a directed evolution of a laccase PIE5 to improve its performance on tetracyclines oxidization at alkaline conditions. Two mutants, namely MutA (D229N/A244V) and MutB (N123A/D229N/A244V) were obtained. Although they shared a similar optimum pH and temperature as PIE5, the two mutants displayed approximately 2- and 5-fold higher specific activity toward the mediators ABTS and guaiacol at pHs 4.0 to 6.5, respectively. Simultaneously, their catalytic efficiency increased by 8.0- and 6.4-fold compared to PIE5. At a pH range of 5-8 and 28 °C, MutA or MutB at a final concentration of 2.5 U·mL-1 degraded 77 % and 81 % of 100 mg·L-1 tetracycline within 10 min, higher than PIE5 (45 %). Furthermore, 0.1 U·mL-1 MutA or MutB completely degraded 100 mg·L-1 chlortetracycline within 6 min in the presence of 0.1 mM ABTS. At pH 8.0, MutA degraded tetracycline and chlortetracycline following the routine pathways were reported previously based on LC-MS analysis.
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Affiliation(s)
- Jie Xu
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China
| | - Yinliang Zhang
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China
| | - Xuelin Zhu
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China
| | - Chen Shen
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China
| | - Shenglong Liu
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China
| | - Yazhong Xiao
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China.
| | - Zemin Fang
- School of Life Sciences, Anhui University, 230601 Hefei, Anhui, China; Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, 230601 Hefei, Anhui, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, 230601 Hefei, Anhui, China.
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2
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He W, Jiang R, Li S, Zhang M, Zhang T, Zhu X, Wang X. Biodegradation mechanism of chlortetracycline by a novel fungal Aspergillus sp. LS-1. CHEMOSPHERE 2023; 340:139792. [PMID: 37579822 DOI: 10.1016/j.chemosphere.2023.139792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/04/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
Chlortetracycline (CTC), a widely used typical tetracycline antibiotic, has raised increasing concerns due to its potential health and environmental risks. Biodegradation is considered an effective method to reduce CTC in environment. In this study, a strain Aspergillus sp. LS-1, which can efficiently degrade CTC, was isolated from CTC-rich activated sludge. Under optimal conditions, the maximum removal efficiency of CTC could reach 95.41%. Temperature was the most significant factor affecting the degradation efficiency of LS-1. The 19 products were identified in the CTC degradation by strain LS-1, and three degradation pathways were proposed. All the degradation pathways for CTC exhibited ring-cleaving, which may accelerate the mineralization of CTC. To gain more comprehensive insights into this strain, we obtained the genome of LS-1, which had high GC content (50.1%) and completeness (99.3%). The gene annotation revealed that LS-1 contains some vital enzymes and resistance genes that may carry functional genes involved in the CTC degradation. In addition, other antibiotic resistance genes were found in the genome of LS-1, indicating that LS-1 has the potential to degrade other antibiotics. This study provides a more theoretical basis for the investigation of CTC degradation by fungi and new insights into the biodegradation of CTC.
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Affiliation(s)
- Wenshan He
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Run Jiang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Siqi Li
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Minglu Zhang
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry,Beijing Technology and Business University,Beijing 100048,China
| | - Tingting Zhang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaobiao Zhu
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Xiaohui Wang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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Meng L, Dong J, Chen J, Lu J, Ji Y. Degradation of tetracyclines by peracetic acid and UV/peracetic acid: Reactive species and theoretical computations. CHEMOSPHERE 2023; 320:137969. [PMID: 36736472 DOI: 10.1016/j.chemosphere.2023.137969] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/20/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
As an environment-friendly oxidant and disinfectant, peracetic acid (PAA) and PAA based-advanced oxidation processes (AOPs) for the treatment of emerging micropollutants have raised increasing interest, owing to their ease of activation and less generation of harmful disinfection byproducts. Tetracyclines (TCs) antibiotics as a group of wide-spectrum antibiotics are frequently detected in sewage effluents, while the knowledge of PAA-based advanced oxidation reactions to remove the substrates is quite limited. In this work, we systematically investigated the kinetics and underlying transformation mechanisms of three TCs including tetracycline (TTC), oxytetracycline (OTC), and chlortetracycline (CTC) in the UV-activated PAA oxidation process. The results indicated that three TCs can be efficiently decayed by UV/PAA. The pseudo-first-order reaction rate constants (kobs) of TCs followed the order: kCTC (0.453 min-1) ≫ kTTC (0.164 min-1) > kOTC (0.158 min-1). Quenching experiments showed that the removal of CTC was mainly ascribed to the direct oxidation of PAA, while TTC and OTC were more susceptible to free radicals. The kobs values of the three TCs by PAA oxidation presented a fairly well correlation to the global nucleophilicity and the activation energies of the TC molecules, highlighting the structure-specific reactions of TCs to PAA. Based on product identification and theoretical calculation, N-demethylation and hydroxylation were proposed as the main pathways for TCs degradation by PAA non-radical oxidation. The combination of PAA and UV irradiation can further improve the degradation efficiency of TCs and contribute to reducing the diffusion and transmission of resistance genes in the environment.
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Affiliation(s)
- Liang Meng
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jiayue Dong
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jing Chen
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China; State Key Laboratory of Pollution Control and Resources Reuse, Nanjing, 210023, China.
| | - Junhe Lu
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuefei Ji
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China
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4
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Yao Y, Li QX. Efficient, fast and robust degradation of chlortetracycline in wastewater catalyzed by recombinant Arthromyces ramosus peroxidase. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159872. [PMID: 36461571 DOI: 10.1016/j.scitotenv.2022.159872] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
Chlortetracycline (CTC), a widely used antibiotic, is recalcitrant and ubiquitous in the environment. Enzymatic degradation of CTC is an economical and efficient bioremediation method. In this work, recombinant Arthromyces ramosus peroxidase (rARP) at a concentration of 3.13 × 10-9 M was used to catalyze rapid degradation of CTC in water. The second-order rate constants of rARP showed up to 62-fold catalytic efficiency of horseradish peroxidase (HRP) toward CTC. The degradation half-life of CTC at the concentrations of 2 and 40 mg L-1 in wastewater under the rARP catalysis was, respectively, 5.3 and 5.7 min at 25 °C, and 2.7 and 3.1 min at 40 °C, which were up to 15-fold and 111-fold faster than HRP and laccase, respectively, but use of 3 % the amount of rARP as HRP. rARP catalyzed degradation of CTC at 2-40 mg L-1 in wastewater completed in 20-24 min, and its catalytic efficiency varied within only 2-fold at 25-40 °C. rARP showed only 2-3-fold discrepancy of catalytic efficiency among pH 5.0, 7.5 and 9.0. CTC under rARP catalysis underwent demethylation and oxidation to form nontoxic N-dedimethyl-9-hydroxy-CTC. The high catalytic efficiency of rARP agreed with a short distance between rARP's δN-His56 and CTC's dimethylamine N as indicated by docking simulation. rARP is a useful enzyme for CTC bioremediation.
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Affiliation(s)
- Yuqun Yao
- School of Medicine, Guangxi University of Science and Technology, Liushi Road 257, Liuzhou 545025, China; Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, HI 96822, USA
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, HI 96822, USA.
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Zhang S, Wang J. Biodegradation of chlortetracycline by Bacillus cereus LZ01: Performance, degradative pathway and possible genes involved. JOURNAL OF HAZARDOUS MATERIALS 2022; 434:128941. [PMID: 35462123 DOI: 10.1016/j.jhazmat.2022.128941] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/06/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Microbial degradation of chlortetracycline (CTC) is an effective bioremediation method. In the present study, an enrichment technique was used to isolate a Bacillus cereus LZ01 strain capable of effectively degrading CTC from cattle manure. Response surface methodology was used to identify optimized conditions under which strain LZ01 was able to achieve maximal CTC removal (83.58%): temperature of 35.77 °C, solution pH of 7.59, CTC concentration of 57.72 mg/L and microbial inoculum of 0.98%. The antibacterial effect of CTC degradation products on Escherichia coli was investigated by the disk diffusion test, revealing that the products by LZ01 degradation of CTC exhibited lower toxicity than parent compound. Shake flask batch experiments showed that the biodegradation of CTC was a synergistic effect of intracellular and extracellular enzymes, and intracellular enzyme had a better degradation effect on CTC (77.56%). Whole genome sequencing revealed that genes associated with ring-opening hydrolysis, demethylation, deamination and dehydrogenation in strain LZ01 may be involved in the biodegradation of CTC. Subsequent seven possible biodegradation products were identified by LC-MS analyses, and the biodegradation pathways were proposed. Overall, this study provides a theoretical foundation for the characterization and mechanism of CTC degradation in the environment by Bacillus cereus LZ01.
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Affiliation(s)
- Sinan Zhang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China
| | - Jihong Wang
- College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China.
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6
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Nickel foam as a new material for chlortetracycline electrochemical oxidation: Biodegradability improvement and biological treatment. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114543] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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7
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Release of manganese and in situ regeneration of manganese dioxide during the degradation of ciprofloxacin. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107600] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kong W, Gao Y, Yue Q, Li Q, Gao B, Kong Y, Wang X, Zhang P, Wang Y. Performance optimization of CdS precipitated graphene oxide/polyacrylic acid composite for efficient photodegradation of chlortetracycline. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:121780. [PMID: 31818661 DOI: 10.1016/j.jhazmat.2019.121780] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/22/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
Here a CdS embedded poly acrylic acid (PAA)/graphene oxide (GO) polymeric composite was prepared for the efficient degradation of chlortetracycline (CTC) driven by visible light irradiation. The structure-activity relationship of GO/PAA-CdS was confirmed through the photocatalytic evaluation of a series of samples prepared by varying GO concentration, molar ratio of Cd:S and the amount of crosslinking agent. Through the composition, morphology, photoelectrochemical characterizations and degradation kinetic studies, it could be confirmed that the enhanced photocatalytic activity is attributed to the controlled growth of CdS nanoparticles by polymer net structure and effective electron transfer along GO nanosheets. The photodegradation of CTC was confirmed to be mainly governed by O2- and OH radicals generated from GO/PAA-CdS. The degradation intermediates of CTC were confirmed by LC-MS, and possible degradation pathways were proposed based on the prediction of radical attacking sites according to Fukui function values obtained through Density Functional Theory (DFT). Moreover, it was found that the catalytic activity of the photocatalyst was maintained after several cycles confirming the enhanced anti-photocorrosion of GO/PAA-CdS. This research provided an efficient approach by a novel photocatalyst for the removal of CTC from wastewater.
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Affiliation(s)
- Wenjia Kong
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Yue Gao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
| | - Qian Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Yan Kong
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Xindong Wang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Ping Zhang
- Shandong Urban Construction Vocational College, Jinan 250103, China
| | - Yu Wang
- Shandong Construction Project Environmental Assessment Service Center, Jinan 250012, China
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Yang S, Liu Y, Shen C, Li F, Yang B, Huang M, Yang M, Wang Z, Sand W. Rapid decontamination of tetracycline hydrolysis product using electrochemical CNT filter: Mechanism, impacting factors and pathways. CHEMOSPHERE 2020; 244:125525. [PMID: 31812051 DOI: 10.1016/j.chemosphere.2019.125525] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 06/10/2023]
Abstract
In this study, electrooxidation of the tetracycline hydrolysis products was investigated using a carbon nanotube (CNT) electrochemical filter and 4-epianhydrochlortetracycline (EACTC) as a model compound. Electrochemical filtration of 10 μmol L-1 EACTC at a voltage of 2.5 V and a flow rate of 1.5 mL min-1 (hydraulic residence time <3 s) provided an oxidation flux of 1251 ± 28 μmol h-1 m-2. Replacement of the Ti cathode with a CNT filter cathode increased the EACTC oxidative flux by 1.3 fold at a voltage of 2.5 V. The electrochemical filtration process is effective for the degradation of EACTC and the reduction of the antimicrobial activity based on liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS) analysis and luminescent bacteria test. The high oxidation flux within 300 min (1212-1263 μmol h-1 m-2) and affordable cost (0.25 kWh m-3) at a voltage of 2.5 V show the potential application of the electrochemical filtration system as a promising unit for EACTC degradation. These findings provided new insights into the rational design principles of novel continuous-flow filtration system aimed to efficiently remove hydrolysis products of the antibiotic tetracycline.
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Affiliation(s)
- Shengnan Yang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
| | - Yanbiao Liu
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China.
| | - Chensi Shen
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China
| | - Fang Li
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China
| | - Bo Yang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
| | - Manhong Huang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China
| | - Ming Yang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Instrumental Analysis Center, Donghua University, Shanghai, 201620, China
| | - Zhiwei Wang
- Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Wolfgang Sand
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Institute of Biosciences, Freiberg University of Mining and Technology, Freiberg, 09599, Germany
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Liu Y, Gao Y, Yao B, Zou D. Removal of chlortetracycline by nano- micro-electrolysis materials: Application and mechanism. CHEMOSPHERE 2020; 238:124543. [PMID: 31450109 DOI: 10.1016/j.chemosphere.2019.124543] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/07/2019] [Accepted: 08/07/2019] [Indexed: 06/10/2023]
Abstract
Nano micro-electrolysis materials (nMETs) have been used to degrade refractory pollutants in batch experiments. The reasonable formation mechanism of nMETs was given through DMXY digital biomicroscopy. Based on the kinetic data of Chlortetracycline (CTC) removal by nMETs in batch experiments, combined with the binomial distribution equation of CTC reduction by nano materials an experimental-scale fluidized bed (ESFB) was designed. The effects of CTC removal performance, pH and iron ion concentration were investigated. Under pure CTC solution environment, the experimental data showed that the average removal rates of CTC by nMET and nano micro-electrolysis material with loading copper (Cu-nMET) are 90.0% and 95.7% in ESFB, respectively. In the presence of nitrate, although the consumption of two kinds of nano-materials increased, their removal efficiencies of pollutants have 2.2%, 0.2% increase compared with the nitrate-free ESFB. At the same time, the CTC degradation pathway and the enhanced removal mechanism by Cu-nMET was proposed. Through microelectrolysis reaction, complexation reaction and the active substances produced, the intermediate products can be degraded completely to NH4+, CO2, H2O and so on. This study aims to provide a theoretical basis for the environmental application of nMETs.
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Affiliation(s)
- Yuzhi Liu
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Yu Gao
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Bing Yao
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Donglei Zou
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China.
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Tunç MS, Hanay Ö, Yıldız B. Adsorption of chlortetracycline from aqueous solution by chitin. CHEM ENG COMMUN 2019. [DOI: 10.1080/00986445.2019.1677628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Müslün Sara Tunç
- Department of Environmental Engineering, Firat University, Elazig, Turkey
| | - Özge Hanay
- Department of Environmental Engineering, Firat University, Elazig, Turkey
| | - Burçin Yıldız
- Department of Environmental Engineering, Firat University, Elazig, Turkey
- Department of Environmental Engineering, Yuzuncu Yil University, Van, Turkey
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Meng L, Lan C, Liu Z, Xu N, Wu Y. A novel ratiometric fluorescence probe for highly sensitive and specific detection of chlorotetracycline among tetracycline antibiotics. Anal Chim Acta 2019; 1089:144-151. [PMID: 31627811 DOI: 10.1016/j.aca.2019.08.065] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 12/17/2022]
Abstract
It is of great importance to detect chlorotetracycline (CTC) in a highly sensitive and specific way because of its wide distribution in aquaculture and animal husbandry. Herein, we propose a novel ratiometric fluorescence strategy to assay CTC by using bovine serum albumin stabilized gold nanoclusters (BSA-AuNCs). The BSA-AuNCs consisting of 25 gold atoms (Au25NCs) display a red emission at 640 nm (λex = 370 nm). In the presence of CTC, a new blue emission at 425 nm is emerged and its intensity dramatically increases with the addition of more the analyte; meanwhile the red emission at 640 nm shows a linear decrease reversely. However, at identical conditions neither the analogues of CTC as tetracycline (TC), oxytetracycline (OTC) or doxycycline (DC) induces similar response of BSA-AuNCs. Such interesting phenomenon is proven related to the conversion from large Au25NCs to smaller nanoclusters composing 8 gold atoms (Au8NCs), which intrinsically originate from the interaction between CTC and the ligand BSA. Therefore, a ratiometric probe is established to sensitively detect CTC in the wide range (0.2-10 μM) with a low limit of detection (LOD) at 65 nM. In addition, this strategy can also be applied to assay CTC in human serum, showing great promise for practical applications in future.
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Affiliation(s)
- Lei Meng
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China; College of Mechanical and Electrical Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Chengwu Lan
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Zhonghu Liu
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Na Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China; College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Yuqing Wu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.
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Weng R, Sun L, Jiang L, Li N, Ruan G, Li J, Du F. Electrospun Graphene Oxide–Doped Nanofiber-Based Solid Phase Extraction Followed by High-Performance Liquid Chromatography for the Determination of Tetracycline Antibiotic Residues in Food Samples. FOOD ANAL METHOD 2019. [DOI: 10.1007/s12161-019-01495-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Degradation of chlortetracycline using nano micro-electrolysis materials with loading copper. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.03.064] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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15
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Barik AJ, Gogate PR. Hybrid treatment strategies for 2,4,6-trichlorophenol degradation based on combination of hydrodynamic cavitation and AOPs. ULTRASONICS SONOCHEMISTRY 2018; 40:383-394. [PMID: 28946437 DOI: 10.1016/j.ultsonch.2017.07.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/21/2017] [Accepted: 07/21/2017] [Indexed: 06/07/2023]
Abstract
Utilization of hybrid treatment schemes involving advanced oxidation processes and hydrodynamic cavitation in the wastewater treatment forms the prime focus of the present work. The initial phase of the work includes analysis of recent literature relating to the performance of combined approach based on hydrodynamic cavitation (HC) for degradation of different pollutants followed by a detailed investigation into degradation of 2,4,6-trichlorophenol (2,4,6-TCP). The degradation of the priority pollutant, 2,4,6-TCP, using combination of HC based on slit-venturi used as the cavitating device, ozone and H2O2 has been investigated. The effect of operating pressure (2-5bar) and initial pH (3-11) have been investigated for the degradation using only HC. The degradation using only ozone (100-400mg/h) and only H2O2 has also been studied. The efficacy of the combined operation of HC+O3 at different ozone flow rates (100-400mg/h) and the combined operation of HC+H2O2 at different loadings of H2O2 (2,4,6-TCP:H2O2 as 1:1-1:7) have been subsequently investigated. The degradation efficacy has also been established for the combined treatment strategies of O3+H2O2 and HC+O3+H2O2 at the optimum conditions of temperature as 30°C, inlet pressure of 4bar and initial pH of 7. Extent of 2,4,6-TCP degradation, TOC and COD removal obtained for HC+O3 process were 97.1%, 94.4% and 78.5% respectively whereas for O3+H2O2 process, the values were 95.5%, 94.8% and 76.2% and for HC+O3+H2O2 process the extent of reduction were 100%, 95.6% and 80.9% in the same order. The combined treatment approach as HC+O3+H2O2 was established as the most efficient approach for complete removal of 2,4,6-TCP with near complete TOC removal.
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Affiliation(s)
- Arati J Barik
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
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Pulicharla R, Brar SK, Rouissi T, Auger S, Drogui P, Verma M, Surampalli RY. Degradation of chlortetracycline in wastewater sludge by ultrasonication, Fenton oxidation, and ferro-sonication. ULTRASONICS SONOCHEMISTRY 2017; 34:332-342. [PMID: 27773254 DOI: 10.1016/j.ultsonch.2016.05.042] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/25/2016] [Accepted: 05/25/2016] [Indexed: 06/06/2023]
Abstract
Residual emerging contaminants in wastewater sludge remain an obstacle for its wide and safe applications such as landfilling and bio-fertilizer. In this study, the feasibility of individual ultrasonication (UlS) and Fenton oxidation (FO) and combined, Ferro-sonication processes (FO) on the degradation of chlortetracycline (CTC) in wastewater sludge was investigated. UlS parameters such as amplitude and sonication time were optimized by response surface methodology (RSM) for further optimization of FS process. Generation of highly reactive hydroxyl radicals in FO and FS processes were compared to evaluate the degradation efficiency of CTC. Increasing in the ratio of hydrogen peroxide and iron concentration showed increased CTC degradation in FO process; whereas in FS, an increase in iron concentration did not show any significant effect (p>0.05) on CTC degradation in sludge. The estimated iron concentration in sludge (115mg/kg) was enough to degrade CTC without the addition of external iron. The only adjustment of sludge pH to 3 was enough to generate in-situ hydroxyl radicals by utilizing iron which is already present in the sludge. This observation was further supported by hydroxyl radical estimation with adjustment of water pH to 3 and with and without the addition of iron. The optimum operating UlS conditions were found to be 60% amplitude for 106min by using RSM. Compared to standalone UlS and FO at 1:1 ratio, FS showed 15% and 8% increased CTC degradation respectively. In addition, UlS of sludge increased estrogenic activity 1.5 times higher compared to FO. FS treated samples did not show any estrogenic activity.
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Affiliation(s)
- Rama Pulicharla
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Satinder Kaur Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada.
| | - Tarek Rouissi
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Serge Auger
- Phytronix Technologies, 4535 Boulevard Wilfrid Hamel, Québec G1P 2J7, Canada
| | - Patrick Drogui
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Mausam Verma
- CO2 Solutions Inc., 2300, Rue Jean-Perrin, Québec, Québec G2C 1T9, Canada
| | - Rao Y Surampalli
- Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA
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