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Isolation,Identification,and Characterization of an Aluminum-Tolerant Bacterium Burkholderia ***1 from an Acidic Red Soil

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Pedosphere 2018年第6期28卷 905-912页

作者： HUANG Shoucheng WANG Xiaodong LIU Xu HE Genhe WU Jichun School of Life Sciences Key Laboratory of Biology Diversity and Ecological Engineering of Jiangxi ProvinceJinggangshan UniversityJi'an 343009(China) School of Life Sciences Anhui Science and Technology UnzversityFengyang 233100(China) Jiangxi Academy of Forestry Nanchang 330013(China) Department of Hydrosciences State Key Laboratory of Pollution Control and Resources ReuseNanjing UniversityNanjing 210093(China)

Aluminum(Al) toxicity usually occurs in acidic soils worldwide, which is detrimental to the growth of organisms. An Al-tolerant bacterium, SB1, was isolated from an acidic red soil of Chingkang Mountain, located in Jiangxi province of China. Polyphasic analysis,including a 16 S rDNA phylogenetic tree as well as morphological and physicochemical properties, revealed that the isolate was a gramnegative, rod-shaped bacterium, which was recognized as Burkholderia sp. SB1 and had extreme acidity tolerance(pH 2.2) and excellent Al resistance(270 mg L^(-1) Al^(3+)). It could remove Al by up to 97.7% at a concentration of 54 mg L^(-1) Al^(3+). SB1 behavior under different temperatures and antibiotics was also examined. SB1 preferred moderate temperature conditions, ranging from 25 to37?C, and exhibited notable resistance to multiple antibiotics(including ampicillin, streptomycin, and tetracycline), except for being sensitive to chloramphenicol. Therefore, as the first reported bacterium to possess favorable Al resistance and excellent Al removal,Burkholderia sp. SB1 can potentially be used as an agent for bioremediation of Al-contaminated acidic red soils.

关键词： antibiotics bioremediation Al resistance Al toxicity microbial community plant growth-promoting bacteria temperature

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Experimental Determination and Modeling of Drying Process of Woody Biomass

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IOP Conference Series: Earth and Environmental Science 2020年第1期552卷

作者： Xiao He Lianjun Wang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing Jiangsu Province 210094 China

Birch is a kind of readily available woody biomass resource, which can be used to crush and manufacture fuel particles and animal bedding. One of the important aspects during the production system is the drying of biomass prior to storage or processing. Moisture migration in wood is a particularly important factor in determining the drying process. The objectives of this study are to investigate the drying characteristics of Birch and develop a model to simulate moisture diffusion in Birch during the drying process. Experiments were conducted in a controlled environment chamber. Different temperatures and relative humidity were set to simulate the different drying conditions. The mechanism of moisture movement in Birch samples during the drying process was represented by a diffusion model according to Fick's second law. A computer program in Matlab software was developed to simulate the infinite element model. Moisture diffusivity of Birch was determined by minimising the sum of squares of the residuals between experimental results and numerically predicted data. Results showed that the moisture diffusion coefficients of Birch ranged from 1.2×10−7m2/hr to 9.6×10−7m2/hr with temperature varying from 20°C to 60°C. And the trend of diffusion coefficient versus temperature was in accordance with the Arrhenius equation.

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Field-scale performance of microelectrolysis-Fenton oxidation process combined with biological degradation and coagulative precipitation for landfill leachate treatment 4

Field-scale performance of microelectrolysis-Fenton oxidatio...

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2019 4th International Conference on Advances in Energy and Environment Research, ICAEER 2019

作者： Zhao, Yuan-Yuan Xu, You-Ze Zhou, Shuang Liu, Jiao-Mei Cheng, Yingxiang Fu, Guang-Yi He, Xiao-Song Key Laboratory of Water Pollution Control Technology Hunan Province Hunan Research Academy of Environmental Sciences Changsha410004 China Chinese Research Academy of Environmental Sciences Beijing100012 China China Railway Fifth Survey and Design Institute Group CO. Ltd Beijing China Railway Ecology and Environment Densign Institute CO. Ltd Beijing102600 China

In order to verify the feasibility of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application, this study conducted the treatment processes at full-scale by physicochemical and spectral characterization. The full-scale studies showed that 48.17% of the dissolved organic carbon (DOC) and 42.27% of the dissolved organic nitrogen (DON) were removed by the microelectrolysis-Fenton oxidation process, respectively. Spectra analysis further suggested that the mature leachate was mainly composed of tryptophan-like and fulvic-like compounds. The combination of microelectrolysis and Fenton oxidation efficiently decomposed the aromatic C=C into carboxyl-C and decreased the molecular size of DOC, resulting in a dramatic reduce (97.1%-98.3%) of the fluorescence intensity. The DON removal by microelectrolysis-Fenton oxidation likely associated with the NH2-decomposition of tryptophan-like and aromatic compounds into NO3-N. The tryptophan-like compounds may play a dominant role in Ba binding, while Pb and Cd were likely bound to both the tryptophan-like and fulvic-like compounds. Above 60% of the heavy metals were removed in the microelectrolysis-Fenton oxidation section. Results above confirmed the effectiveness of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application. © The Authors, published by EDP Sciences, 2019.

关键词： Aromatic compounds

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Experimental Determination of Moisture Diffusivity of Birch

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IOP Conference Series: Earth and Environmental Science 2020年第4期546卷

Birch is one of the renewable biomass resources. The high moisture content of raw materials increases the cost of transportation and pelletization. Drying is an effective approach to reduce the moisture content of biomass before storage and other operations to a safe and manageable level. Moisture diffusion in wood could affect the drying process significantly. In this study, the drying process of Birch materials was modeled by Fick's second law. Results from the experiment were utilized to determine the moisture diffusivity with parameter estimation. It showed that the diffusion coefficients of Birch increased from 1.2×10-7 to 9.6×10-7 m2 h-1 with the temperature ranging of 20-60°C. The trend of moisture diffusion coefficients followed Arrhenius equation with respect to temperature. For high-temperature drying, this model can help to terminate the drying process in a timely manner, thus conserving energy consumption.

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Core-shell [email protected] 2 O encapsulated Ag NPs nanocomposites for photooxidation-adsorption of iodide anions under visible light

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Separation and Purification technology 2021年 262卷

作者： Jiuyu Chen Aotian Gu Elvis Djam Miensah Ying Liu Peng Wang Ping Mao Chunhui Gong Yan Jiao Kai Chen Zongxiang Zhang Yi Yang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing 210094 China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Faculty of Chemical Engineering Huaiyin Institute of Technology Huaian 223003 China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) Nanjing University of Information Science & Technology Nanjing 210044 China Jiangsu Environmental Protection Key Laboratory of Monitoring for Organic Pollutants in Soil Taizhou Environmental Monitoring Center Taizhou 225300 China

Iodide anion (I − ) is one of the most-problematic radioactive nuclides in used nuclear fuel due to its intrinsic characteristics of a high toxicity and environmental mobility. Therefore, effective and selective elimination of I − from nuclear contaminated solution is highly beneficial for the pollution remediation purposes in the development of nuclear power, but is of significant challenge owing to the extreme conditions of the high acidity, strong ionizing radiation field and high concentration of competing anions. Herein, a novel core–shell [email protected] 2 O (ZC) encapsulated Ag nanoparticles (Ag NPs) nanocomposites have been fabricated via a facile one step self-assembly process and an environmentally friendly technique. The as-fabricated [email protected] @Cu 2 O (ZAC) nanocomposites were characterized and applied to capture of I − from aqueous solution. Adsorption studies revealed that the ternary nanocomposites showed fast removal kinetics, high photooxidation-adsorption capacity (up to 217.4 mg g −1 at pH = 3 for ZAC-2), satisfactory selectivity and high acidity resistance. Furthermore, the nanocomposites also exhibited a good reusability, as no significant change in the uptake capacity was observed even after five adsorption-regeneration cycles. Inspired by the superior features, a possible mechanism (chemical adsorption coupled with photooxidations) was proposed based on XRD, XPS and Raman spectra analysis for the pre- and post-adsorbed samples as well as the detailed adsorption experimental evidence.

关键词： Iodide anions Core–shell [email protected] 2 O [email protected] @Cu 2 O Photooxidation-adsorption

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Rationally designed/constructed MnO_x/WO_3 anode for photoelectrochemical water oxidation

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Chinese Chemical Letters 2018年第6期29卷 811-814页

作者： Xiaohu Cao Xiangyu Zang Xichen Zhou Mindong Chen Yong Ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) Nanjing University of Information Science & Technology

Photoelectrocatalytic water splitting is an effective way to utilize the solar energy to solve the energy shortage. The valence band edge of WO3 located at 3V vs. normal hydrogen electrode（NHE）, which can offer enough potential to kinetically oxidize water for oxygen evolution reaction. However, water oxidation reaction kinetics is sluggish when only WO3 is used as the photoanode. It is highly desirable to use cocatalyst to promote the kinetics. Mn Oxloaded on the WO3 photoanode through photodeposition methods improves the photoelectrochemical water oxidation performance. A maximum photocurrent density of composite photoanode is achieved with a deposition time of 3 min, which is higher than that of pristine WO3 photoanode around 40%. Mn O2 is not only a cocatalyst for water splitting but also for improving oxidation selectivity. We tried to use two means to load Mn Oxon WO3 photoanode material. It is observed that loading a moderate amount of Mn Oxon the WO3 by photodeposition can promote the performance of the WO3 photoanode.

关键词： Photoelectrochemical water oxidation Tungsten oxide Manganese oxide Photodeposition Hydrothermal method

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Study on adsorption of lead and cadmium by non-burning ceramic granules from waterworks residual sludge

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IOP Conference Series: Earth and Environmental Science 2020年第1期601卷

作者： Haiyun Tang Yuanyuan Zhao Yaoyu Li Danni Liu Yuehui Chen Youze Xu Hunan Research Academy of Environmental Science Hunan Province Key Laboratory of Water Pollution Control Technology Changsha Hunan 410004 China College of Environment and Resources Xiangtan University Xiangtan 411105 China

In this experiment, the unburned ceramiste water treatment residuals (UCWTR) was prepared by the burning-free method to study its adsorption performance on Pb and Cd. Adsorption experiments show that the quality of ceramsite improved with the height of the filler layer in the reaction column, and its penetration and depletion time are prolonged. On the contrary, the driving force of mass transfer increases with the initial concentration of water in the reaction column, and the penetration and exhaustion time is shortened. The dynamic adsorption process of Pb and Cd by UCWTR is more consistent with the Thomas model and Yoon-Nelson model, and the correlation coefficient R2 is greater than 0.9. Under the condition that the initial flow rate v is 10 mL/min, the height of the packing layer h is 10 cm, and the initial concentration C0 is 150 mg/g, the fitted dynamic saturated adsorption capacities of UCWTR for lead and cadmium are 9.22 mg/g, 11.52 mg/g, the static adsorption capacity of lead and cadmium are 1.48 times and 155 times respectively. kT decreases as the height of the filler layer and the initial concentration increase; kYN decreases as the height of the filler layer increases, and increases as the initial concentration increases; the time t required to penetrate 50% of the adsorbent increases with the height of the filler layer and decreases with the increase of the initial concentration, which indicated that the solution did not reach full contact with UCWTR during the dynamic adsorption process.

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Nanoparticles for improving biogas production and effluent biofertilizer

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Scientific reports 2025年第1期15卷 19233页

作者： Taha Abdelfattah Mohammed Abdelwahab Junting Pan Ji-Qin Ni Chunping Yang Mahendra Kumar Mohanty Elwan Ali Darwish Samir Hafez Mohamed Desoky Haiping Yang Ahmed Elsayed Mahmoud Fodah Faculty of Agricultural Engineering Al-Azhar University Cairo Egypt. State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China. Department of Agricultural and Biological Engineering Purdue University West Lafayette IN 47907 USA. Academy of Environmental and Resource Sciences School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming 525000 Guangdong China. Key Laboratory of Environmental Biology and Pollution Control (Hunan University) College of Environmental Science and Engineering Ministry of Education Hunan University Changsha 410082 Hunan China. School of Environmental Science and Engineering Hainan University Haikou 570228 Hainan China. College of Agriculture Engineering and Technology Odisha University of Agriculture & Technology Bhubaneswar Odisha 751003 India. State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China. Faculty of Agricultural Engineering Al-Azhar University Cairo Egypt. ahmedfodah@azhar.edu.eg. State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China. ahmedfodah@azhar.edu.eg.

The impact of nanoparticles (NP) mixtures (Fe + Ni + Co, Fe + Ni, Fe + Co, and Ni + Co) on the anaerobic digestion (AD) of cow manure was examined through kinetic modelling (Modified Gompertz, Logistic, and First-order kinetic) and experimental observations. The NPs mixture significantly enhanced biogas production rate and yield potential. The variation between predicted and actual biogas yields was smaller with the Modified Gompertz model (1.37% to 5.30%) and First-order kinetic model (0.04% to 3.83%) compared to the Logistic model (1.99% to 7.04%). Additionally, digestates containing NPs showed strong fertility properties (5.16% to 5.36%). The combined use of kinetic models and experiments offers an effective way to quantify the influence of NPs mixture on AD performance, aiding in industrial application.

关键词： Anaerobic digestion Digestate Fertilizer Kinetic model Nanoparticle mixture

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Study on Occurrence Speciation and Activity of Uranium Tailing Contaminants in the Presence of *** MR-1 under Anaerobic Conditions 2

Study on Occurrence Speciation and Activity of Uranium Taili...

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2018 2nd International Symposium on Resource Exploration and Environmental Science, REES 2018

作者： Zhang, Xichen Xie, Shuibo Liu, Hongjuan Liu, Yingjiu Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology University of South China Hengyang China Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy University of South China Hengyang China Institute of Nuclear Science and Technology University of South China Hengyang China

Taked a uranium tailings pond in hunan province as the research object, three groups of reaction systems including min (mineral group), min-dbio (mineral-dead bacteria) and min-bio (mineral-viable bacteria) were set up for the sequential batch experiments. The metal elements of U, Fe, Cd, and Pb in the uranium tailings which have reacted with S. oneidensis MR-1 for 2d, 4d, 10d, and 20d were studied by the sequential chemical extraction methods, to analyzed the effect of species of contaminants in Uranium Tailings by S. oneidensis MR-1. The results showed that the residual state is the main occurrence mode of each metal element. The release of contaminants from tailings is mainly attributed to the dissolution of exchangeable state. The complexation or adsorption of the dead bacteria and metal elements leads to the increase of the organic matter. The effect of *** MR-1 promoted the release of each metal elements in the exchangeable state, carbonate binding state, organic matter binding state and the amorphous iron manganese oxide binding state of tailings sample, and the reduction of S. oneidensis MR-1 caused U6+ to produce U4+, resulting in an increase in the content of residuals, while Fe3+ was reduced to Fe2+, resulted in an increase in the binding state of crystalline iron-manganese oxides. © Published under licence by IOP Publishing Ltd.

关键词： Bacteria

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Immobilizing laccase on kaolinite and its application in treatment of malachite green effluent with the coexistence of Cd (П)

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Chemosphere 2019年 217卷 843-850页

作者： Xiaofeng Wen Chunyan Du Jia Wan Guangming Zeng Danlian Huang Lingshi Yin Rui Deng Shiyang Tan Jinfan Zhang College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China. Electronic address: wenxf0105@***. School of Hydraulic Engineering Changsha University of Science &Technology Changsha 410114 PR China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114 PR China. Electronic address: cydu@***. College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China. Electronic address: wanjia@***. College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China. Electronic address: zgming@***. College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China. Electronic address: huangdanlian@***. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114 PR China. Electronic address: yin@***. College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China. Electronic address: dengrui703@***. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114 PR China. Electronic address: tan_shiyang0518@***. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114 PR China. Electronic address: yiyangzjf@***.

Malachite green effluent with the Coexistence of Cd (П) was efficiently decolorized by kaolinite-laccase (Kaolin-Lac). Laccase from Trametes versicolor was immobilized onto the kaolinite through physical adsorption contact. The optimal conditions were 180 min of immobilization time and 0.8 mg/mL of enzyme solution. Kaolin-Lac could obtain a loading efficiency of 88.22%, a loading capacity of 12.25 mg/g, and the highest activity of 839.01 U/g. Moreover, the process of immobilization increased its pH stability and operational stability. Kaolin-Lac retained above 50% of the original activity and nearly 80% decolorization for MG after 5 cycles. In the presence of 3, 5-Dimethoxy-4-hydroxybenzaldehyde (SA), Kaolin-Lac could degrade over 98% of malachite green. The coexistence of Cd (П) was beneficial to the decolorization of malachite green by Kaolin-Lac. The structural and morphological features of kaolinite, Kaolin-Lac and Kaolin-Lac after degradation were determined by scanning electron microscopy-energy spectrum analysis (SEM-EDS) and Fourier transform infrared spectroscopy (FTIR). Cadmium appeared on the Kaolin-Lac after degradation. After immobilization and degradation, the surface groups on kaolinite were changed. Kaolin-Lac showed its more potential continuous employment than free laccase in practical malachite green dyes effluent mixed with Cd (П).

关键词： Cd (П) Coexistence Kaolinite Laccase immobilization Malachite green Removal

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