Article
Agricultural Engineering
Tengxia He, Mengping Chen, Chenyu Ding, Qifeng Wu, Manman Zhang
Summary: The key denitrifying gene nirB of Pseudomonas taiwanensis J488 was determined through draft genome sequencing. The nitrification of ammonium by the strain was not affected by high concentrations of divalent metal ions, and the efficiency of nitrate removal was significantly enhanced by the addition of various doses of divalent metal ions, promoting bacterial growth in both nitrifying and denitrifying processes. Overall, the results indicate that divalent metal ions do not severely limit the strain's capacity to purify nitrogen-polluted wastewater.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Min Deng, Xiaoli Zhao, Yeerken Senbati, Kang Song, Xugang He
Summary: Pseudomonas sp. DM02 demonstrates efficient nitrogen removal capabilities in aquaculture wastewater treatment, with quick removal of total ammonia nitrogen and nitrates. Optimal environmental conditions and the presence of functional genes play a crucial role in water quality treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yuanyuan Miao, Liang Zhang, Deshuang Yu, Jianhua Zhang, Wenke Zhang, Guocheng Ma, Xinchao Zhao, Yongzhen Peng
Summary: Intermittent aeration is an effective strategy for biological wastewater treatment, allowing for advanced nitrogen removal and reduced energy consumption. It is suitable for partial nitrification and denitrification processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Yumeng Xie, Xiangli Tian, Yu He, Shuanglin Dong, Kun Zhao
Summary: Recently, functional microorganisms capable of eliminating nitrogenous waste have been used in mariculture systems. Strain DN3, a potential candidate for treating mariculture wastewater, showed a high efficiency in removing ammonia, nitrate, and nitrite at various concentrations and conditions. The nitrogen assimilation pathway and bacterial nitrification pathway were investigated, and the results provide important insight into the nitrogen metabolism of Halomonas sp. and support the use of strain DN3 for treating mariculture wastewater.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Fengxing Xie, Myat Thiri, Hui Wang
Summary: Six bacterial strains with simultaneous nitrification-denitrification abilities were isolated from a Beijing sewage treatment plant to improve nitrogen biodegradation efficiency. The strain X49, identified as Pseudomonas mendocina, was found to be the best strain for rapidly degrading high concentrations of inorganic nitrogen. X49 demonstrated efficient removal of ammonia, nitrite, and nitrate under aerobic conditions, achieving high degradation rates.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Liuqin Huang, Junyue Luo, Linxin Li, Hongchen Jiang, Xiaoxi Sun, Jian Yang, Weiyu She, Wen Liu, Liqing Li, Allen P. Davis
Summary: Bioretention systems are environmentally friendly measures for managing urban stormwater runoff. This study investigated the fate of inorganic nitrogen (NH4+ and NO3-) in bioretention systems under different configurations and stormwater conditions. The results showed that NH4+ was efficiently converted to NO3- by ammonia-oxidizing and nitrite-oxidizing bacteria in the oxic media. However, the pathways for NO3- removal varied depending on the configuration of the bioretention columns. Vegetation improved NO3- reduction through root assimilation and enhancement of microbial activity in the rhizosphere. The presence of an organic-rich saturation zone stimulated chemolithotrophic NO3- reduction coupled with oxidation of reductive sulfur compounds, while an organic-poor saturation zone allowed for multiple oligotrophic NO3- reduction pathways. These findings emphasize the importance of considering the variation in N transformation pathways for designing bioretention systems.
Article
Biotechnology & Applied Microbiology
Min Liao, Yixin Luo, Na Xu, Xiaomei Xie, Xinjun Gan, Dan Cao
Summary: A heterotrophic nitrifier and aerobic denitrifier, identified as Enterobacter cloacae DK-6, was isolated from chaff bedding of a pig farm. Strain DK-6 showed efficient nitrogen removal abilities under aerobic condition, achieving removal efficiencies of 86.98%, 94.66%, and 100% for ammonium-N, nitrate-N, and nitrite-N, respectively. The study also found that strain DK-6 preferred to utilize nitrite-N when mixed nitrogen sources were present, leading to improved nitrate-N removal efficiency. The results suggested that strain DK-6 has significant potential in treating multiple nitrogen pollutants in wastewater under aerobic condition and lower carbon/nitrogen ratio.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Xiaoying Zhang, Yuxiang Xia, Yiwei Zeng, Xia Sun, Ruidong Tao, Yunjun Mei, Mengjie Qu
Summary: Pseudomonas sp. Y-5 is a strain with simultaneous nitrification and denitrification capacity, capable of rapidly removing high concentrations of inorganic nitrogen. It can adapt to high concentrations of ammonia or organic nitrogen, and exhibits nitrification ability even in aerobic conditions, with high removal efficiencies for nitrate and nitrite.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Manping Zhang, Jung-Chen Huang, Shanshan Sun, Muhammad Muneeb Ur Rehman, Shengbing He, Weili Zhou
Summary: Constructed wetlands are effective in removing nitrogen from water, with potential activities of DNRA, anammox, denitrification, and nitrification contributing to nitrogen removal. Planted mesocosms showed better performance in nitrogen removal compared to unplanted mesocosms, with higher values of potential activities of nitrogen-cycling pathways observed in the planted mesocosms.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Shiqi Wu, Na Lv, Yu Zhou, Xiufen Li
Summary: This study presents a novel Lysinibacillus fusiformis B301 strain that effectively removes nitrogenous pollutants via heterotrophic nitrification and aerobic denitrification (HN-AD) in one aerobic reactor. Under optimal conditions, it achieved high nitrogen removal rates for ammonium, nitrate, and nitrite. The strain preferentially consumed ammonium nitrogen and converted 83.25% of it to gaseous nitrogen.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Agricultural Engineering
Linhui Wu, Xiaoyu Ding, Yan Lin, Xingshun Lu, Hang Lv, Manping Zhao, Ruihong Yu
Summary: A newly identified bacterial strain, Acinetobacter calcoaceticus TY1, efficiently metabolized nitrogen from ammonium at low temperatures, indicating its potential for wastewater management.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Bohui Wei, Xiao Luo, Wenkai Ma, Pengyi Lv
Summary: In this study, a cold-resistant Rhizobium strain W57 was isolated and identified, showing significant de-nitrogenation efficiency at 15℃. The nitrogen metabolic pathways and enzyme activities were determined for strain W57. The findings suggest that W57 has potential application in cold sewage treatment.
BIORESOURCE TECHNOLOGY
(2022)
Review
Biotechnology & Applied Microbiology
Basanta Kumar Biswal, Kuppusamy Vijayaraghavan, Max Gerrit Adam, Daryl Lee Tsen-Tieng, Allen P. Davis, Rajasekhar Balasubramanian
Summary: Bioretention systems are effective low-impact development technologies that can manage high runoff volumes and reduce nitrogen pollutants through various mechanisms. Denitrification is the major pathway of permanent nitrogen removal and factors like multilayer biofilter media and wet storm events can significantly improve nitrogen removal efficiency.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
Mengping Chen, Tengxia He, Qifeng Wu, Manman Zhang, Kai He
Summary: Different carbon sources were evaluated for nitrogen removal by Glutamicibacter arilaitensis EM-H8, showing the strain's ability to rapidly remove NH4+-N, NO3--N, and NO2--N. The highest removal rates were achieved with sodium citrate for NH4+-N, sodium succinate for NO3--N, and sucrose for NO2--N. The presence of NH4+-N increased the removal rate of NO2--N. Enzyme assays detected the activities of ammonia mono-oxygenase, nitrate reductase, and nitrite oxidoreductase, highlighting strain EM-H8's potential for efficient nitrogen removal.
Article
Engineering, Chemical
Masashi Nishida, Syuhei Matsuo, Karin Yamanari, Masayoshi Iwahara, Katsuki Kusakabe
Summary: In this study, it was found that Rhodotorula graminis NBRC0190 immobilized on calcium alginate hydrogel beads can efficiently remove nitrate-nitrogen in simulated groundwater. The denitrification performance of the beads can be maintained even after repeated treatments. When applied to actual groundwater, it can improve water quality.
Article
Energy & Fuels
Bangxin Li, John T. S. Irvine, Jiupai Ni, Chengsheng Ni
Summary: The study demonstrates that adding Ce and Ni elements in solid oxide fuel cells can improve performance under ethanol fuel, reduce coke deposition issues, making the fuel cell more stable and efficient.
Article
Environmental Sciences
Chong Wang, Tianai Zhang, Lifeng Yin, Chengsheng Ni, JiuPai Ni, Li-An Hou
Summary: This study demonstrated the electrochemical degradation of PFOA using Ti3+ self-doping TiO2 nanotube arrays (Ti3+/TiO2-NTA) anode, showing high efficiency and low energy consumption compared to traditional methods. The possible degradation mechanism of PFOA involved enhanced oxidation through direct electron transfer on the anode, leading to rapid mineralization into CO2 and F-.
Article
Agronomy
Lei Liu, Wenxuan Lu, Zhongyi Li, Chaofu Wei, Deti Xie, Jiupai Ni, Chengsheng Ni
Summary: The study shows that hydrothermally treated soils can produce light-emitting carbon dots that can indicate the content of soil organic matter. The research explores the correlation between light absorbance and photoluminescence of carbon dots with soil organic matter, demonstrating a potential method for monitoring SOM.
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
(2022)
Article
Engineering, Chemical
Shenglin Liu, Wu Menglin, Lanying Lu, Jiupai Ni, Chengsheng Ni, John T. S. Irvine
Summary: The perovskite La0.5Ba0.5CuxFe1-xO3-delta was studied as a cathode for a protonic solid oxide fuel cell (H-SOFC), showing potential for improved performance. The introduction of Fe in the composition enhanced certain conductivity parameters but reduced proton conductivity, while mixed cations in La0.5Ba0.5Cu0.5Fe0.5O3-delta achieved a low thermal expansion coefficient.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Chong Wang, Tianai Zhang, Jinlin Luo, Menglin Wu, Junfeng Niu, Enxiang Shang, Chengsheng Ni, Jiupai Ni
Summary: In this study, the TiO2 nanotube array intercalated PbO2 material was applied in the piezoelectro-catalytic removal of ciprofloxacin (CIP). The synergistic process of piezocatalysis and electrochemical oxidation was found to be an effective way to promote degradation efficiency of CIP at ultralow current density and ultrasonic power.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yuan Zhang, Xuelin Zhang, Jiupai Ni, Chengsheng Ni
Summary: The doping of variable-valence Mn4+/3+2+ on the B site of stable SrTiO3 is explored as both the cathode and the anode for an SSOFC. The additional Pr3+/4+ donor on the Sr site of SrTi0.5Mn0.5O3 enhances the structure stability, electric conductivity, and electrocatalysis. The performance under CH4/H2 fuel can be boosted by loading Ni/ceria onto the anode.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Environmental Sciences
Shaojun Tan, Deti Xie, Chengsheng Ni, Guangyao Zhao, Jingan Shao, Fangxin Chen, Jiupai Ni
Summary: This study assessed the spatiotemporal distribution characteristics and influential factors of air pollutants in the Chengdu-Chongqing urban agglomeration (CCUA) by combining air quality monitoring data and wavelet analysis. The results showed that air quality in the CCUA has been improving year by year, with higher pollutant concentrations in autumn and winter compared to summer. The spatial distribution of air pollutants was concentrated in Chengdu, Chongqing, Zigong, and Dazhou. The research results have important implications for pollution prevention and control in the CCUA.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Menglin Wu, Haoyang Yu, Jiupai Ni, Chengsheng Ni
Summary: In this study, perovskite-type La0.8Ce0.2FeO3 is utilized as a host oxide for the exsolution of ceria in air, and further doped with Pr3+ or Gd3+ to achieve the exsolution of PrOx- and Gd2O3- doped ceria for potential anode materials in solid oxide fuel cells. The LPCF anode with 1 wt% Ni infiltration demonstrates the lowest polarization resistance and highest cell performance at 800 degrees C in H2 fuel, while LCF and LGCF anodes show stability under hydrocarbon fuel conditions.
JOURNAL OF POWER SOURCES
(2022)
Article
Biodiversity Conservation
Shaojun Tan, Guangyao Zhao, Chao Peng, Wei Ye, Deti Xie, Fangxin Chen, Chengsheng Ni, Jingan Shao, Liping Zheng, Jiupai Ni
Summary: Studying the relationship between water body nutrients and landscape elements in an agricultural watershed helps to understand the process of non-point source pollution. In this study, the Qi River basin was selected as the research area and various methods were used to analyze the effects of landscape elements on nitrogen and phosphorus. The results showed higher nitrogen and phosphorus concentrations in the dry season compared to the rainy season, and significant spatial differences in the watershed.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Shaojun Tan, Deti Xie, Jiupai Ni, Lei Chen, Chengsheng Ni, Wei Ye, Guangyao Zhao, Jingan Shao, Fangxin Chen
Summary: Although physical models have achieved important results in assessing non-point source pollution (NPSP), their application is limited due to the need for large volumes of data and accuracy. Constructing a scientific evaluation model of N and P output in NPSP is significant for identifying sources and preventing pollution. We constructed an input-migration-output (IMO) model based on the export coefficient model (ECM) and identified the main drivers of NPSP using geographical detector (GD) in Three Gorges Reservoir area (TGRA). The results showed that the improved model increased the prediction accuracy for total nitrogen (TN) and total phosphorus (TP) and had implications for NPSP prevention and control.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Debo He, Yizhu Gong, Jiupai Ni, Chengsheng Ni
Summary: This study explores the in-situ decoration of CeO2 and Ni nanoparticles on the surface of a chromite anode in order to enhance the performance and stability of solid oxide fuel cells (SOFCs). The exsolution of CeO2 and Ni0 nanoparticles significantly improves the performance of the Ce-LCN anode under propane and H2 fuel conditions. Injecting 20% H2 in volume into CH4 has been found to effectively enhance the coking resistance of the anode, resulting in a CH4 conversion rate of approximately 85% and close to unity selectivity for CO. This study provides a viable solution for the simultaneous production of electricity and syngas from CH4 using complex perovskite SOFCs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Agricultural Engineering
Dan Shi, Ram Kumar Shrestha, Hikmatullah Obaid, Nader Saad Elsayed, Shouqin Zhong, Mohammad Hanif Hashimi, Yongyi Cheng, Deti Xie, Chengsheng Ni, Jiupai Ni
Summary: Maize is significant for biofuel and bio-based products, and a clean maize production system can reduce environmental pollution and achieve sustainable development. Melamine, as a nitrogen-rich source, can be used as a slow-release nitrogen fertilizer, promoting melamine waste recycling and reducing nitrogen loss.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Environmental
Jingwen Chen, Chong Wang, Jibiao Li, Jiupai Ni, Yu Tang, John T. S. Irvine, Chengsheng Ni
Summary: A wide bandgap CaTiO3-delta (CTO) with oxygen vacancy (VO) was studied for its sensitization or photochromism properties, and the photocatalytic performance of CTO under visible light was investigated. The adsorption of CO2 created an intermediate gap state in CTO, increasing the light absorption peak at 482 nm (A482). The VO on the surface enhanced the adsorption and oxidation of NO2 intermediates during photocatalytic NO oxidation in air. The gas sensitization and photochromism of CTO contributed to the activation of O2 in dry air. These findings deepen our understanding of the chemisorption of gaseous species in the electronic structural tunability of semiconductors and its impact on photocatalytic reactions at the gas/solid interface.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Jingwen Chen, Menglin Wu, Jiupai Ni, Chengsheng Ni
Summary: Photocatalytic oxidation of NOx using visible light is an environmentally friendly method. This study found that Cs3Bi2-xPbxBr9-x (x = 0.0443), with Br vacancy (V-Br) induced by Pb2+ doping, exhibits significant NO oxidation efficiency under visible light. Moreover, the di-azo coupling was found to passivate the activation of NO on V-Br.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Xuelin Zhang, Yuan Zhang, Jiupai Ni, John T. S. Irvine, Chengsheng Ni
Summary: Solid oxide fuel cells (SOFCs) are efficient devices for converting chemical energy to electricity. Traditional Ni(O) anodes suffer from coking and instability issues, requiring exploration of alternative oxide anodes. This study investigates the use of n-type transparent conductive oxides (TCOs) as low-temperature SOFC anodes, demonstrating high conductivity and stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)