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Inhibitive effects of chlortetracycline on performance of the nitritation-anaerobic ammonium oxidation(anammox)process and strategies for recovery

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Journal of Environmental Sciences 2018年第8期30卷 29-36页

作者： Hong Yao Huayu Li Jing Xu Lushen Zuo Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard Department of Municipal and Environmental Engineering Beijing Jiaotong University

The short-and long-term effects of chlortetracycline（CTC） on the nitritation-anaerobic ammonium oxidation（anammox） process were evaluated. The half maximal inhibitory concentration of CTC in the batch tests of the nitritation-anammox process was 278.91 mg/L at an exposure time of 12 hr. The long-term effects of CTC on the process were examined in a continuous-flow nitritation-anammox reactor. Within 14 days, the nitrogen removal rate significantly decreased from 0.61 to 0.25 kg N/m^3/day with 60 mg/L CTC in the *** performance suppressed by CTC barely recovered, even after CTC was removed from the influent. Furthermore, the inhibition of CTC also reduced the relative abundance of ammonium oxidizing bacteria（AOB） and anaerobic ammonium oxidizing bacteria（An AOB）in the reactor, resulting in both a decreased amount of and an imbalance between AOB and An AOB. When fresh anammox sludge was reseeded into the nitritation-anammox reactor,the nitrogen removal rate recovered to 0.09 ± 0.03 kg N/m3/day.

关键词： Nitritation-anammox process Anaerobic ammonium oxidizing bacteria (AnAOB) Ammonium oxidizing bacteria (AOB) chlortetracycline

Effects of chlortetracycline,Cu and their combination on the performance and microbial community dynamics in swine manure anaerobic digestion

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Journal of Environmental Sciences 2018年第5期30卷 206-215页

作者： Rui Wang Junya Zhang Jibao Liu Dawei Yu Hui Zhong Yawei Wang Meixue Chen Juan Tong Yuansong Wei State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China. Institute of Energy Jiangxi Academy of SciencesNanchang 330096China University of Chinese Academy of Sciences Beijing 100049China

Swine manure was typical for the combined pollution of heavy metals and antibiotics. The effects of widely used veterinary antibiotic chlortetracycline（CTC）, Cu and their combination on swine manure anaerobic digestion performance and microbial community have never been investigated. Thus, four 2 L anaerobic digestion reactors were established including reactor A（control）, B（CTC spiked by 0.5 g/kg dry weight, dw）, C（Cu spiked by 5 g/kg dw） and D（combination of CTC, 0.5 g/kg dw, and Cu, 5 g/kg dw）, and dynamics of bacterial and archaeal community structure was investigated using high throughput sequencing method. Results showed that addition of CTC and Cu separately could increase the total biogas production by21.6% and 15.8%, respectively, while combination of CTC and Cu severely inhibited anaerobic digestion（by 30.3%）. Furthermore, corresponding to different stages and reactors, four kinds of microbes including bacteria and archaea were described in detail, and the effects of CTC, Cu and their combination mainly occurred at hydrolysis and acidification phases. The addition of Cu alone changed the dynamics of archaeal community significantly. It was genus Methanomassiliicoccus that dominated at the active methane production for A, B and D, while it was genus Methanobrevibacter and Methanoculleus for C.

关键词： chlortetracycline Cu Anaerobic digestion Swine manure Microbial community

Photolysis of chlortetracycline in aqueous solution:Kinetics,toxicity and products

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Journal of Environmental Sciences 2012年第2期24卷 254-260页

作者： Yong Chen Hua Li Zongping Wang Tao Tao Dongbin Wei Chun Hu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China.

The aqueous photodegradation of the widely used antibiotic chlortetracycline（CTC） was investigated under simulated *** quantum yield of photodegradation increased from 3.3 × 10-4 to 8.5 × 10-3 within the pH range of 6.0 to *** presence of Ca2＋,Fe3＋,and NO3-enhanced the photodegradation of CTC,whereas Mg2＋,Mn2＋,and Zn2＋ inhibited the degradation with the order Mn2＋ Zn2＋ Mg2＋ at pH *** monovalent cations（Na＋ and K＋） had negligible effect on the photolysis of *** acid（FA） decreased the photodegradation of CTC due to light screening *** peroxide（H2O2） was formed concurrently with direct photodegradation of *** generation rate of H2O2 increased from 0.027 to 0.086 μmol/（***） when the pH ranged from 6.0 to *** CTC solution was about three-fold more toxic to the Photobacterium phosphoreum bacteria after irradiation,suggesting that the photoproducts and H2O2 formed in the CTC solution exhibited high risk on the *** LC-ESI（＋）-MS,the photoproducts of CTC were *** direct photodegradation of CTC was involved in hydroxylation and N-demethyl/dedismethyl *** main photoproducts included the iso-CTC analog containing hydroxyl groups（m/z 511.4 and 495.4）,and the N-demethyl/dedismethyl products of the photoproduct m/z 495.4（m/z 481.3 and 467.4）.In addition,the photochemical dechlorination of CTC led to tetracycline（m/z 445.5）.

关键词： chlortetracycline direct photodegradation phototoxicity photoproducts

Natural capsicum extract replacing chlortetracycline enhances performance via improving digestive enzyme activities,antioxidant capacity,anti-inflammatory function,and gut health in weaned pigs

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Animal Nutrition 2021年第2期7卷 305-314页

作者： Shenfei Long Sujie Liu Jian Wang Shad Mahfuz Xiangshu Piao State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing100193China

The objective of this study was to investigate the effects of natural capsicum extract(NCE,containing 2%natural capsaicin,the rest is carrier)replacing chlortetracycline(CTC)on performance,digestive enzyme activities,antioxidant capacity,inflammatory cytokines,and gut health in weaned pigs.A total of 108 weaned pigs(Duroc×[Landrace×Yorkshire],initial body weight-8.68±1.34 kg;weaned on d 28)were randomly allotted into 3 treatments with 6 replicate pens per treatment(3 barrows and 3 gilts per pen).The treatments include a corn-soybean meal basal diet as a control group(CON),a CTC group(basal diet+CTC at 75 mg/kg),and a NCE group(basal diet--NEC at 80 mg/kg).Compared with CON and CTC,NCE had increased(P<0.05)average daily gain in phase 2(d 15 to 28)and overall(d 1 to 28),and higher(P<0.05)apparent total tract digestibility of gross energy,dry matter,crude protein,and organic matter in phase 1(d 1 to 14).These pigs also had increased(P<0.05)pancrelipase activity in pancreas,α-amylase,lipase and protease activities in the jejunal mucosa,and lipase activity in the ileal mucosa on d ***,NCE had increased(P<0.05)the contents of growth hormone,β-endorphin,5-hydroxytryptamine,total antioxidant capacity,total superoxide dismutase,catalase,and IL-10,as well as decreased(P<0.05)contents of malondialdehyde,tumor nuclear factor-a,interferon-y,and interleukin-6 in serum on d 28 compared with CON and *** showed higher(P<0.05)propionic acid,butyric acid and total volatile fatty acids(VFA)contents,and increased(P<0.05)relative abundance of Faecalibacterium in colon,as well as higher(P<0.05)propionic acid and total volatile fatty acids in cecum on d 28 compared with *** conclusion,NCE replacing CTC could enhance performance via improving digestive enzyme activities,antioxidant capacity,anti-inflammatory function,gut VFA composition and microbiota community in weaned pigs,and it could be used as a potential target for the development of feed additives.

关键词： Antioxidant capacity chlortetracycline Natural capsicum extract Performance Weaned pig

Adsorption of chlortetracycline from Water by Rectories

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Chinese Journal of Chemical Engineering 2012年第5期20卷 1003-1007页

作者：吕国诚吴丽梅王晓龙廖立兵王小雨 School of Materials Sciences and Technology China University of Geosciences School of Engineering and Technology China University of Geosciences

The removal of antibiotics from water by clay minerals has become the focus of research due to their strong adsorptive ability. In this study, adsorption of chlortetracycline (CTC) onto rectories was conducted and the effects of time, concentration, temperature and pH were investigated. Experimental results showed that adsorption equilibrium was reached in 8 h. Based on the Langmuir model, the maximum adsorption capacity of CTC on rectories was 177.7 mg·g 1 at room temperature. By the study on adsorption dynamics, it is found that the kinetic date fit the pseudo-second-order model well. The adsorption of CTC by rectories is endothermic and the free energy is in the range of 10 to 30 kJ·mol 1 . The pH value of solution has significant effects on adsorption and the optimal pH is at acidity (pH 2-6). At concentration of 2500 mg·L 1 , the intercalated CTC produces an interlayer space with a height of 1.38 nm, which is 1.12 nm in raw rectories, suggesting that the adsorption occurs between layers of rectories.

关键词： adsorptxon rectory chlortetracycline

Macleaya cordata helps improve the growth-promoting effect of chlortetracycline on broiler chickens

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2018年第10期19卷 776-784页

作者： Bin LI Jin-qiu ZHANG Xian-gan HAN Zheng-lei WANG Yuan-yuan XU Jin-feng MIAO Key Laboratory of Animal Physiology and Biochemistry College of Veterinary MedicineNanjing Agricultural University National Research Center for Veterinary Vaccine Engineering and Technology of China Jiangsu Academy of Agricultural Sciences Shanghai Veterinary Research Institute Chinese Academy of Agricultural Sciences

chlortetracycline （CTC）, one kind of common antibiotic for prevention and treatment of various diseases, also exhibits good performance in accelerating the growth of livestock. Macleaya cordata, a traditional Chinese medicine, is usually used as a natural additive in livestock because of its anti-microbial, anti-fungal, anti-inflammatory, and pesticidal activity. In this work, we studied whether M. cordata helps regulate the growth-promoting effect of CTC on broiler chickens. It is demonstrated that M. cordata improves the growth-promoting effect of CTC on growth per- formance indices of broiler chickens, such as survival rate, daily weight, and feed to weight rate. M. cordata also delays the maximum of CTC residues in plasma. It may depend on the higher values of operational taxonomic unit （OTU） and the indices of o diversity driven by simultaneous use of CTC and M. cordata.

关键词： chlortetracycline Macleaya cordata Broiler chicken Growth promotion Gut flora

Green remediation of tetracyclines in soil-water systems

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Health 2013年第12期5卷 2039-2044页

作者： Om Prakash Bansal Chemistry Department D.S. College Aligarh India

The presence of tetracyclines in soil and surface water is an emerging concern. The present study was undertaken to investigate remediation of tetracylines (tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC)) from aqueous solution using vetiver grass, water lettuce, and sunflower and root exudates of water lettuce, sunflower and from soil by tomato, Indian mustard and carrot plant. The data of this study denote that vetiver grass, water lettuce, sunflower remedy tetracyclines from water. The remediation % after 63 days of treatment was 87-61 for TC;88-68 for OTC and 87-68 for CTC. The remediation of tetracyclines at lower concentration of antibiotics in presence of root exudates of water lettuce and sunflower was more than 99% and remediation was faster than water lettuce or sunflower. The remediation of tetracyclines from aqueous solution may be due to oxidation of-OH group(s) of tetracycline through a process that is thought to involve reactive oxygen intermediates and/or role of peroxidase enzyme. The plant crops viz., tomato, Indian mustard and carrot can remedy 41%-72% of amended tetracyclines. The maximum bioaccumulation of TC and CTC was in Indian mustard and OTC was maximally bioaccumulated in tomato.

关键词： Soil Antibiotics Tetracycline chlortetracycline Oxytetracycline Remediation Root Exudates Vetiver Grass Sunflower