Article
Agronomy
Ziyi Feng, Yongxiang Yu, Huaiying Yao, Chaorong Ge
Summary: This study found that the presence of ZnO nanoparticles can increase N2O emissions in soil, especially when coupled with C and N substrate amendments. The action of ZnO NPs promotes nitrification and denitrification processes, further impacting the functional genes associated with N2O emissions.
Article
Agriculture, Multidisciplinary
Junichi Takahashi, Makoto Shoda, Jianhua Li, Ning Li
Summary: This study examined the ability of heterotrophic bacteria Alcaligenes faecalis strain No.4 to remove ammonia from sewage sludge, with the aim of mitigating ammonia pollution from piggery wastewater and preventing pollution in adjacent rivers. The study found that A. faecalis strain No.4 had a significantly higher removal rate for high-strength ammonium compared to conventional aerobic nitrification and anaerobic denitrification processes. Therefore, using A. faecalis strain No.4 can efficiently remove ammonia and phytopathogens from piggery wastewater and prevent water pollution in nearby rivers.
JOURNAL OF AGRICULTURAL SCIENCE
(2022)
Article
Environmental Sciences
Tanya Valkova, Vanessa Parravicini, Ernis Saracevic, Joseph Tauber, Karl Svardal, Jorg Krampe
Summary: N2O emissions in activated sludge tanks are mainly influenced by the activity of nitrifying bacteria and the efficiency of heterotrophic denitrification. Low-loaded plants achieving high nitrogen removal exhibit lower N2O emission intensity. The regression analysis shows a negative linear correlation between the N2O emission factor and the total nitrogen removal degree of the plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Xinyi Yang, Pengpeng Duan, Guitong Li, Xiaorong Zhao, Qimei Lin, Kun Zhu
Summary: In this study, the application modes of organic fertilizer and chemical nitrogen fertilizer in soil were investigated, with the finding that spatial heterogeneous granulation of these fertilizers may increase the risk of nitrous oxide emissions, while a higher proportion of maize residues could potentially mitigate such increased emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
T. D. S. Pereira, R. H. Spindola, C. A. B. S. Rabelo, N. C. Silveira, M. A. T. Adorno, A. Kunz, E. C. Pires, M. H. R. Z. Damianovic
Summary: This study investigated the influence of COD and nitrite/ammonium ratio on N2O emissions from anammox-granular sludge reactor, finding that N2O emissions were minimized by controlling the NO2--N/NH4+-N ratio in the influent and maintaining COD concentration below 100 mgO(2) L-1. The TN removal efficiencies were higher than 70% in all conditions tested.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Kang Song, Yunpeng Xue, Lu Li, Min Deng, Xiaoli Zhao
Summary: Contamination by nanoplastics in urban water has raised increasing concerns. This study examined the impact of continuous nanoplastic exposure on wastewater treatment processes and found that it does not significantly inhibit total nitrogen removal. However, it does lead to a decrease in ammonia oxidation and denitrification rates. Nanoplastic exposure also affects microbial structure and bacterial functions.
Article
Engineering, Environmental
Shengjie Li, Shuo Wang, Guodong Ji
Summary: This study investigated the influence of different carbon sources on N2O production and reduction, isotopic signatures, microbial populations, and enzymes during denitrification in freshwaters. The results demonstrated a link between carbon sources, N2O production and reduction, isotopic signatures, microbial populations, and enzymes during denitrification.
Article
Soil Science
Lei Song, Shuli Niu
Summary: Nitrification and denitrification, driven by microbes, play important roles in regulating soil nitrogen availability and nitrogen oxide (N2O) emissions. This study found that enhanced nitrogen deposition generally stimulates both nitrification and denitrification rates, particularly with longer durations of nitrogen addition. The abundances of functional genes AOB amoA and narG were crucial for these responses. These findings challenge the traditional understanding that long-term nitrogen deposition diminishes the positive response of N2O emissions by dampening microbial activity.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Environmental Sciences
Huoqing Wang, Jia Miao, Yuepeng Sun
Summary: This study compared nitrogen removal and N2O emissions from lab-scale anoxic/aerobic sequencing batch reactor (AOSBR) and intermittent aeration sequencing batch reactor (IASBR), finding that IASBR showed enhanced nitrogen removal efficiency and lower N2O emission factors compared to AOSBR. N2O emissions were significantly higher during simultaneous nitrification and denitrification (SND) compared to aerobic nitrification and denitrification, with different emission factors for oxidized ammonium in each phase.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Siqi Li, Yu Zhen, Ye Chen, Tiezhu Mi, Zhigang Yu
Summary: This study investigated a hotspot for N2O production on the continental margins and found that spatial heterogeneity is the primary factor influencing N2O concentration differences in sediments.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Environmental
Shunan Zhang, Junli Chen, Feng Liu, Shuangtong Lv, Jinshui Wu
Summary: Free ammonia and free nitrous acid can inhibit the nitrogen removal ability of strain WT14, especially in alkaline conditions where strain WT14 exhibits higher tolerance and removal rates.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Lei Yang, Shen Cui, Yong-Xiang Ren, Lin-Kai Guo, Huan-Huan Liu, Zhi-Hao Zhang, Li-Xin Tu, Jia Wang, Xiao-Tong Li
Summary: Pseudomonas aeruginosa YL isolated from activated sludge showed high-efficiency simultaneous nitrification and denitrification abilities, with strong flocculation and sedimentation performance. Its denitrification pathway was proposed as a sequential heterotrophic nitrification-aerobic denitrification process, indicating good potential for treating ammonium-rich wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Soil Science
Zheng-Rong Kan, Qihang Wei, Ruoyan Yang, Yanling Li, Jiajia Zhou, Jianying Qi, Feng-Min Li, Haishui Yang
Summary: Earthworms and arbuscular mycorrhizal fungi (AMF) both play important roles in soil nitrogen (N) cycling. Earthworms increase N2O emissions through changes in soil organic carbon (SOC) and NH4+ concentration, while AMF can mitigate earthworm-induced N2O emissions by decreasing nitrification intensity. This study enhances our understanding of the soil N cycle in terms of N2O production in the presence of AMF and earthworms.
APPLIED SOIL ECOLOGY
(2023)
Article
Agricultural Engineering
Jinyu Ye, Huan Gao, Carlos Domingo-Felez, Junkang Wu, Manjun Zhan, Ran Yu, Barth F. Smets
Summary: Cerium dioxide nanoparticles have a significant impact on nitrogen transformation processes and N2O emission in wastewater treatment systems, decreasing NH4+ -N removal efficiency and increasing N2O emission. Although NH4+ -N removal efficiency can recover after a period of restoration, N2O emission levels remain higher.
BIORESOURCE TECHNOLOGY
(2022)
Article
Soil Science
Zengming Chen, Ye Li, Yehong Xu, Shu Kee Lam, Longlong Xia, Nan Zhang, Michael J. Castellano, Weixin Ding
Summary: Nitrification inhibitors have shown effectiveness in reducing soil nitrous oxide and nitric oxide emissions from nitrogen-fertilized croplands, but their impact is limited during the spring thaw period, resulting in overall neutral effects for the whole year.
Article
Agriculture, Dairy & Animal Science
Y. Dini, J. I. Gere, C. Cajarville, Veronica S. Ciganda
ANIMAL PRODUCTION SCIENCE
(2018)
Article
Soil Science
M. Lopez-Aizpun, C. Arango-Mora, C. Santamaria, E. Lasheras, J. M. Santamaria, V. S. Ciganda, L. M. Cardenas, D. Elustondo
SOIL BIOLOGY & BIOCHEMISTRY
(2018)
Article
Soil Science
Guillermo Guardia, Antonio Vallejo, Laura M. Cardenas, Elizabeth R. Dixon, Sonia Garcia-Marco
SOIL BIOLOGY & BIOCHEMISTRY
(2018)
Article
Microbiology
Hans Halbwachs, Gary L. Easton, Roland Bol, Erik A. Hobbie, Mark H. Garnett, Derek Persoh, Liz Dixon, Nick Ostle, Peter Karasch, Gareth W. Griffith
ENVIRONMENTAL MICROBIOLOGY
(2018)
Article
Agronomy
Veronica S. Ciganda, Maria Lopez-Aizpun, Miguel A. Repullo, Di Wu, Jose A. Terra, David Elustondo, Tim Clough, Laura M. Cardenas
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
(2019)
Article
Biochemical Research Methods
Antonio Castellano-Hinojosa, Nadine Loick, Elizabeth Dixon, G. Peter Matthews, Dominika Lewicka-Szczebak, Reinhard Well, Roland Bol, Alice Charteris, Laura Cardenas
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2019)
Article
Agriculture, Multidisciplinary
Deborah V. Gaso, Andres G. Berger, Veronica S. Ciganda
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2019)
Review
Biodiversity Conservation
Maria Lopez-Aizpun, Claire A. Horrocks, Alice F. Charteris, Karina A. Marsden, Veronica S. Ciganda, Jess R. Evans, David R. Chadwick, Laura M. Cardenas
GLOBAL CHANGE BIOLOGY
(2020)
Article
Multidisciplinary Sciences
Ian M. Clark, Qingling Fu, Maider Abadie, Elizabeth R. Dixon, Aimeric Blaud, Penny R. Hirsch
SCIENTIFIC REPORTS
(2020)
Article
Soil Science
Andrew S. Gregory, Adrian Joynes, Elizabeth R. Dixon, Deborah A. Beaumont, Phil J. Murray, Mike W. Humphreys, Goetz M. Richter, Jennifer A. J. Dungait
Summary: The study showed that root traits selected for increased depth, density, and diameter may enhance SOC in grasslands. Two high-yielding forage grass cultivars were found to have positive effects on root and SOC stocks, with fast-growing cultivars enhancing these stocks compared to typical pasture. Lipid biomarkers confirmed that root inputs were the main carbon source for the soil.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Daniel Santander, Juan Clariget, Georgget Banchero, Fabiano Alecrim, Claudia Simon Zinno, Julieta Mariotta, Jose Gere, Veronica S. Ciganda
Summary: This study evaluated the impact of different fiber content diets on methane emissions from beef steers and compared different models for predicting these emissions. The results showed that a moderate fiber diet improved performance and reduced the intensity of methane emissions. The IPCC 2006 model had the best accuracy and precision.
Article
Agriculture, Dairy & Animal Science
Yoana Dini, Cecilia Cajarville, Jose Gere, Sofia Fernandez, Martin Fraga, Maria Isabel Pravia, Elly Ana Navajas, Veronica S. Ciganda
TRANSLATIONAL ANIMAL SCIENCE
(2019)
Article
Soil Science
A. M. Carswell, P. W. Hill, D. L. Jones, M. S. A. Blackwell, P. J. Johnes, E. R. Dixon, D. R. Chadwick
BIOLOGY AND FERTILITY OF SOILS
(2018)