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Occurrence of veterinary antibiotics in struvite recovery from swine wastewater by using a fluidized bed

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Frontiers of Environmental science & Engineering 2018年第3期12卷 99-105页

作者： Zhi-Long Ye Yujun Deng Yaoyin Lou Xin Ye Shaohua Chen Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiarnen 361021 China

Recovering phosphorus from livestock wastewater has gained extensive attention. The residue of veterinary antibiotics in the wastewater may be present in the recovered products, thereby posing pharmacological threats to the agricultural planting and human health. This study investigated antibiotic occurrence in the struvite particles recovered from swine wastewater by using a fluidized bed. Results revealed that tetracyclines possessed significant residues in the struvite granules, with the values ranging from 195.2μ***^-1 to 1995.0 μ***^-1. As for fluoroquinolones, their concentrations varied from 0.4μg·kg^-1 to 1104.0 μg·kg^-1. Struvite particles were of various sizes and. shapes and displayed different antibiotic adsorption capacities. The data also showed that the smaller granules contained much more antibiotics than the larger ones, indicating that the fluidized granulation process of struvite crystals plays an important role on the accumulation of antibiotics. For tetracyclines, organic matters and struvite adsorption exerted significant impacts on tetracyclines migration. The outcomes underscore the need to consider the residues of antibiotics in resource recovery from wastewater because they exert pharmacological impacts on the utilization of recovered products.

关键词： Antibiotic Struvite Phosphorus recovery Swine wastewater Fluidized bed

Effects of Poria cocos polysaccharide on growth performance,physiological parameters,and lipid metabolism of spotted sea bass Lateolabrax maculatus

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Journal of Oceanology and Limnology 2024年第1期42卷 316-331页

作者： Jing LU Zhangfan HUANG Youling YE Anle XU Zhongbao LI Fisheries College Jimei UniversityXiamen 361021China Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment Xiamen 361021China

The aquaculture industry has developed significantly over the past few decades and has had a substantial impact on the global food supply and marine fisheries ***,some problems arise behind the scenes due to excessive intensive farming,such as slow animal growth,frequent disease,and lipid metabolism *** problems have limited the sustainable development of the aquaculture industry,and a continuable solution is *** use of fungal polysaccharide appears to provide a solution to these ***,different supplemented levels of Poria cocos polysaccharide(PCP)(0,0.4,0.8,1.2,1.6,and 2.0 g/kg,respectively)were fed to spotted sea bass(Lateolabrax maculatus)in similar size(30.28±0.18 g)in current *** effects of PCP on growth,physiological parameters,and lipid metabolism of spotted sea bass were investigated after a 4-week rearing *** showed,fish with PCP intake presented a significantly higher weight gain,specific growth rate,and a significantly lower feed conversion *** higher trypsin activity in liver and intestine were observed in fish with PCP *** superoxide dismutase activity in serum and liver of fish with PCP intake were significantly improved,while significantly higher serum total antioxidant capacity and hepatic catalase activity were also ***,no significant differences in lysozyme and alkaline phosphatase activity were evident among *** with PCP intake showed a significantly lower total cholesterol,but no noteworthy change in triglyceride and lipid-metabolismrelated genes expression were observed among *** indicated that intake of PCP has a positive effect on growth and antioxidant capacity of spotted sea bass,but seems to have a limited effect on the non-specific immunity and lipid metabolism of spotted sea *** on the regression analysis results,1.4 g/kg of PCP is the optimal dose for spotted sea bass in size(30.28±0.18 g).

关键词： spotted sea bass Poria cocos polysaccharide growth lipid metabolism

A ratiometric fluorescent probe for hypoxanthine detection in aquatic products based on the enzyme mimics and fluorescence of cobalt-doped carbon nitride

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Food science and Human Wellness 2024年第2期13卷 879-884页

作者： Xin Wang Chengyi Hong Zhengzhong Lin Zhiyong Huang College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China

A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition to emitting strong fluorescence,the peroxidase activity of Co doped g-C_(3)N_(4)can catalyze the reaction of O-phenylenediamine and H_(2)O_(2)to produce diallyl phthalate which can emit yellow fluorescence at 570 *** the decomposition of Hx by xanthine oxidase,Hx can be indirectly detected by the generating hydrogen peroxide based on the measurement of fluorescent ratio I(F_(570)/F_(370)).The linear range was 1.7-272.2 mg/kg(R^(2)=0.997),and the detection limit was 1.52 mg/kg(3σ/K,n=9).The established method was applied to Hx detection in bass,grass carp,and shrimp,and the data were verified by *** result shows that the established probe is sensitive,accurate,and reliable,and can be used for Hx detection in aquatic products.

关键词： Co doped g-C_(3)N_(4) Ratiometric fluorescent probe Hypoxanthine Freshness Aquatic products

Specific Recognition of Breast Cancer Cells In Vitro Using Near Infrared-Emitting Long-Persistence Luminescent Zn_3Ga_2Ge_2O_(10):Cr^(3+)Nanoprobes

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Nano-Micro Letters 2015年第2期7卷 138-145页

作者： Jinlei Li Junpeng Shi Jiangshan Shen Huizi Man Mingxi Wang Hongwu Zhang School of Biomedical sciences Huaqiao University and Engineering Research Center of Molecular Medicine Ministry of Education Institute of Urban Environment Chinese Academy of Science

In this paper, near-infrared emitting long-persistence luminescent Zn3Ga2Ge2O10:Cr3?(ZGG) nanoparticles with diameters of 30–100 nm and bright luminescence were prepared by a sol–gel synthesis method. After the surface amination, the nanoparticles were further bioconjugated with breast cancer-specific monoclonal antibody(anti-Ep CAM) to form ZGG-Ep CAM nanoprobes which can specifically target breast cancer cell lines(MCF7) in vitro. The results of in vitro images show that the luminescence signals from the cells treated with ZGG-Ep CAM nanoprobes are stronger than those from cells treated with ZGG-unconjugated antibody, indicating that the prepared ZGG-Ep CAM nanoprobes possessed excellent specific recognition capability. Furthermore, due to their long afterglow properties, the imaging could persist more than 1 h. Therefore, these nanoprobes could not only provide a high specificity detection method for cancer cells but also realize the long-time monitoring. Developed near-infrared emitting long-persistence luminescent nanoprobes will be expected to find new perspectives for cell therapy research and diagnosis applications.

关键词： Nanoprobes Long afterglow Near-infrared luminescence Target imaging

Phosphorus recovery from wastewater by struvite crystallization:Property of aggregates

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Journal of Environmental sciences 2014年第5期26卷 991-1000页

作者： Zhilong Ye Yin Shen Xin Ye Zhaoji Zhang Shaohua Chen Jianwen Shi Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences

Struvite crystallization is a promising method to remove and recover phosphorus from wastewater to ease both the scarcity of phosphorus rock resources and water eutrophication worldwide. To date, although various kinds of reactor systems have been developed, supporting methods are required to control the stmvite fines flushing out of the reactors. As an intrinsic property, aggregation is normally disregarded in the struvite crystallization process, although it is the key factor in final particle size and therefore guarantees phosphorus recovery efficiency. The present study developed a method to analyze the characteristics of struvite aggregates using fractal geometry, and the influence of operational parameters on struvite aggregation was evaluated. Due to its typical orthorhombic molecular structure, struvite particles are prone to crystallize into needle or rod shapes, and aggregate at the comers or edges of crystals. The determined fractal dimension （Dpf） of struvite aggregates was 1.52-1.31, with the corresponding range of equivalent diameter （d0.5） at 295.9-85.4 Ixm. Aggregates formed in relatively low phosphorus concentrations （3.0-5.0 mmol/L） and mildly alkaline conditions （pH 9.0-9.5） displayed relatively compact structures, large aggregate sizes and high aggregation strength. Increasing pH values led to continuous decrease of aggregate sizes, while the variation of Dpf was insignificant. As to the aggregate evolution, fast growth in a short time followed by a long steady stage was observed.

关键词： struvite aggregate fractal dimension phosphorus recovery image analysis

Data classification from the inverse nth power gravitation

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science China(Information sciences) 2012年第1期55卷 184-190页

作者： XU HuaRong1,WANG XiaoDong1,ZENG ZhiQiang1&FANG Qiu2 1Department of Computer science and technology,xiamen University of technology,xiamen 361024,China 2Department of Mechanical Engineering,xiamen University of technology,xiamen 361024,China 1. Department of Computer science and technology Xiamen University of Technology Xiamen 361024 China2. Department of Mechanical Engineering Xiamen University of Technology Xiamen 361024 China

By the inverse nth power gravitation in physics,a novel classifier for data classification,called the I-n-PG classifier,is *** the I-n-PG model,training samples from each class are regarded as a system of particles and an I-n-PG field is defined for each class.A test sample belongs to the class whose particle system has the maximum I-n-PG to this test *** on large numbers of real data show that the I-n-PG classifier can provide a good classification *** with the nearest neighbor classifier and SVM,performances of the I-n-PG classifier are always superior/close to the better one of them,and thus the I-n-PG classifier has also a wide range of adaptability to data sets.

关键词： data classification inverse nth power gravitation

Bioinspired design of integral molded Janus silk fibroin-MXene evaporator for efficient solar vapor generation

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Nano Research 2024年第4期17卷 2824-2835页

作者： Ling-Qing Kong Zhi-Cheng Zeng Guang-Zong Min Zhao-Hui Meng Guo-Qing Meng Xiao-Xiao Guo Nai-Bo Lin Xiang-Yang Liu The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Research Center of Biomedical Engineering of XiamenDepartment of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005China The State Key Laboratory of Marine Environmental science(MEL) College of Ocean and Earth SciencesXiamen UniversityXiamen 361005China

Solar vapor generation is a promising sustainable technology that uses solar distillation to produce fresh water from seawater and wastewater,helping relieve global water resource ***,inspired by naturally grown integrally molded mulberry leaves with a Janus hydrophilic and hydrophobic structure,a novel,simple,and efficient integrated molding method is proposed to break through the limitations of the traditional split manufacturing strategy and realizes the integrated formation of Janus *** on the spontaneous sedimentation characteristics of MXene in silk fibroin solution and its regulation of mesoscopic structure and hydrophilicity of silk fibroin,layered structures with different compositions and hydrophilicities were obtained in one ***,ethanol and glutaraldehyde were added to construct a physical crystallization-chemical crosslinking dual stabilization structure in silk *** evaporator has the evaporation rate of 3.07 kg·m^(-2)·h^(-1) and the efficiency of 86.8%under 1 sun and maintains high evaporation performance under various extreme test conditions including vigorous washing,repeated compression,and high-intensity ultraviolet(UV)***,the evaporator performs well in practical application scenarios,its evaporation rate in the simulated Dead Sea seawater exceeds 2.13 kg·m^(-2)·h^(-1),and more than 99.9%of the salt,heavy metal ions,oil pollution,and dyes are purified.

关键词： silk fibroin MXene bioinspired integrated molding Janus structure solar vapor generation

Preparation,characterization and performance of an electrospun carbon nanofiber mat applied in hexavalent chromium removal from aqueous solution

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Journal of Environmental sciences 2019年第3期31卷 75-84页

作者： Zhihua Yuan Xiaoxia Cheng Lubin Zhong Renxiang Wu Yuming Zheng CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences

Hexavalent chromium, Cr(VI), a highly toxic oxyanion known as a carcinogen and mutagen,is an issue of concern due to its adverse impact on human health. Therefore, development of effective technologies and/or materials for Cr(VI) removal from water has been of great interest for researchers. In this study, an electrospun carbon nanofiber(CNF) mat was prepared via electrospinning polyacrylonitrile(PAN), followed by thermal pre-oxidation and carbonization. Scanning electron microscopy(SEM) observation showed that the fiber diameter of the CNF with carbonization temperature of 950°C(CNF_(950)) was about 266 *** titration analysis demonstrated that the point of zero charge p H(pHpzc) of CNF_(950) was around 7.93. CNF_(950) demonstrated high adsorption capacity and fast adsorption kinetics for Cr(VI) at pH < 3. Langmuir isotherm calculations showed that the maximum adsorption capacity of Cr(VI) on CNF_(950) was 118.8 mg/g at pH 2. The adsorption isotherm of Cr(VI) on CNF_(950) was well described by the Redlich–Peterson model, revealing that Cr(VI)adsorption was the result of a combination of monolayer and multilayer adsorption,depending on the initial Cr(VI) concentration. Solution pH greatly affected Cr(VI) adsorption onto CNF_(950) due to the electrostatic interaction, and the adsorption capacity was relatively high when pH was below 3. X-ray photoelectron spectroscopy(XPS) analysis revealed that the removal of Cr(VI) might be the result of a combination of redox reaction and electrostatic adsorption. The adsorption-saturated CNF_(950) could be regenerated by NaOH solution. This study extends the potential applicability of electrospun CNF mats for Cr(VI)-contaminated water purification.

关键词： Adsorption Carbon nanofiber mat Electrospinning Hexavalent chromium Redox reaction

Reconstruction and functionalization of aerogels by controlling mesoscopic nucleation to greatly enhance macroscopic performance

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Chinese Physics B 2023年第3期32卷 25-35页

作者：焦晨璐邵光伟陈宇岳刘向阳 College of Ocean and Earth sciences Shenzhen Research Institute of Xiamen UniversityXiamen UniversityShenzhen/Xiamen 361005China College of Textile and Clothing Engineering Soochow UniversitySuzhou 215006China Engineering Research Center of Technical Textiles Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China

This work presents a strategy for the mesoscopic engineering of hierarchically structured sodium alginate(SA)aerogels to enhance the macroscopic *** strategy was implemented by meso-functionalizing and reorganizing SA aerogels via controlled heterogeneous nucleation,in which microcrystalline cellulose-manganese dioxide(MCC-MnO_(2))nano-crystallites worked as *** to the short rod-like structure and abundant hydroxyl groups of MCC-MnO_(2),the organized mesostructure of SA aerogels was reconstructed during the assembly of SA molecule chains,which gave rise to a significant enhancement in macroscopic performance of SA *** instance,the functionalized and reconstructed MCC-MnO_(2)/SA aerogels acquired a more than 70%increase in mechanical strength with an excellent deformation ***,an almost double enhancement of removal capacity for metal ions(i.e.,Cu^(2+)and Pb^(2+))and organic dyes(i.e.,congo red and methylene blue)was obtained for MnO_(2)/SA aerogels,with an 87%repossession of the pollutants removal performance after 5 operation cycles.

关键词： mesoscopic reconstruction aerogel sodium alginate microcrystalline cellulose MnO_(2)nanoparticles