Article
Agriculture, Multidisciplinary
Xiao Pu, Yanjia Hu, Hongguang Cheng, Jing Xie, Yuhu Zhang, Xingyong Li, Wenlong Song, Huan Xu, Shaokang Meng
Summary: This study investigated the effects of different land uses on dissolved nitrogen export in Baijiang soil area and found increased export of dissolved nitrogen through base flow and storm flow after conversion from dry croplands to paddy fields.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Forestry
Mark B. Burnham, Martin J. Christ, Mary Beth Adams, William T. Peterjohn
Summary: The study investigated the impact of forest species composition changes on NO3- export. It was found that with the increase of maple tree importance, nitrification increased, but the total N uptake increased, leading to an offsetting change in NO3- supply and demand with a small net increase.
Article
Environmental Sciences
Ruoming Cao, Siyu Chen, Shinpei Yoshitake, Toshiyuki Ohtsuka
Summary: This study found that urban evergreen broad-leaved forests receive significant nitrogen deposition, with a large portion coming from dissolved organic nitrogen (DON). This highlights the importance of considering different forms of nitrogen deposition in forest ecosystems and the potential impact on biodiversity.
ATMOSPHERIC POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Zhenyu Zhang, Yajing Liao, Jinliang Huang
Summary: This study proposes a framework to quantify seasonal dissolved inorganic nitrogen (DIN) export coefficients for different land-use types in a catchment in Southeast China. The results show that farmland and forest have the highest and lowest export coefficients, respectively, and reveal the complex role of built-up areas in nitrogen export.
Article
Engineering, Civil
Haijuan Zhao, Yongjun Jiang, Qiong Xiao, Cheng Zhang, Hamid M. Behzad
Summary: The study reveals a close relationship between the cycling of carbon and nitrogen in karst aquatic systems, with dissolved organic carbon concentrations influenced by the metabolic pathways of subaquatic communities. The metabolic processes of photosynthesis and respiration primarily control the transformation of dissolved inorganic carbon and nitrate, with higher proportions observed in the dry season. The coupled C-N cycling involving DIC and NO3 promotes the production of autochthonous DOC, acting as long-term natural carbon and nitrogen sinks in karst aquatic systems.
JOURNAL OF HYDROLOGY
(2021)
Article
Multidisciplinary Sciences
Jens Terhaar, Ronny Lauerwald, Pierre Regnier, Nicolas Gruber, Laurent Bopp
Summary: Research indicates that carbon and nutrients from land play a significant role in Arctic Ocean ecosystems and NPP, contributing to the evolution of Arctic Ocean NPP in the future.
NATURE COMMUNICATIONS
(2021)
Article
Oceanography
Tianzhen Zhang, Qiang Hao, Haiyan Jin, Youcheng Bai, Yanpei Zhuang, Di Qi, Jianfang Chen
Summary: This study evaluates the long-term trends in the nitrogen and carbon reservoirs in the subsurface layer of the Canada Basin using two data sets from 1990 to 2015. The results show an increase in the subsurface nitrogen reservoir over 25 years, while the nitrogen concentration remained fairly constant. Additionally, the subsurface layer experienced an increase in the ratio between carbon and nitrogen. The study suggests that the enhanced mixing between the subsurface and surface layers may promote primary production and turn the subsurface layer into a carbon source.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Ecology
Joel T. Bostic, David M. Nelson, Keith N. Eshleman
Summary: Storm events have a significant impact on the export of atmospheric nitrate (NO3-) in urban watersheds and larger rainfall events are more effective in exporting atmospheric NO3-. Management practices that reduce the hydrologic connectivity of impervious surfaces can help mitigate the impact of storm events on NO3- export from developed watersheds.
Article
Environmental Sciences
Ji Yeow Law, Leigh Ann Long, Amy Kaleita, Matthew Helmers, Conrad Brendel, Katherine van der Woude, Michelle Soupir
Summary: It is necessary to use combinations of BMPs in the MARB to achieve nutrient reduction goals. Results from a study in paired catchments show that higher coverage of BMPs can effectively reduce nitrate and total nitrogen loads. Precipitation patterns and seasonality also play a role in nitrogen export.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Yangzhou Xiang, Josep Penuelas, Jordi Sardans, Ying Liu, Bin Yao, Yuan Li
Summary: Microplastics have complex effects on soil inorganic nitrogen, causing a significant reduction in water-extractable nitrate nitrogen concentration but no significant impact on ammonium nitrogen concentration. The effects of microplastics on soil inorganic nitrogen are influenced by microplastics characteristics, experimental conditions, and soil properties.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
H. K. M. Mihiranga, Yan Jiang, M. G. S. Sathsarani, Xuyong Li, Tharindu Ritigala, Hailu Demissie, Wei Wang
Summary: This study assessed the behaviors of nitrogen (N) in a semi-arid mountainous watershed in northern China during the 2020 rainy season to explore the mechanisms controlling N export. The results showed that increased loadings of dissolved organic-N (DON) and particulate N (PN) in rivers were the main cause of changes in N flux and composition during the rainy season. Storm runoff contributed the most to DON and PN, which mainly originated from near-stream soil and were transported by shallower subsurface flow. Additionally, hydrological processes played a significant role in regulating N loss during storm events. The study also identified watershed regions responsible for excessive N delivery and examined the impacts of unsustainable agriculture, sewage treatment work, and damming on natural riverine N fluxes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Ffion Atkins, Pippin M. L. Anderson, Candice Bouland
Summary: Urban watersheds receive excessive nitrogen loads and the capacity to remove this excess nitrogen depends on the functioning of riparian and wetland ecosystems. This study provides a preliminary quantification of nitrogen flux in a small urban watershed and highlights the important role of wetland systems in removing nitrogen.
LANDSCAPE AND URBAN PLANNING
(2022)
Article
Environmental Sciences
Boqiang Li, Fei Yang, Baiyang Chen, Juan Li, Lijuan Zhu, Wen-Tao Li
Summary: Dissolved organic nitrogen (DON) plays a key role in various processes, but detecting it at trace levels is difficult due to high method detection limits (MDL). To solve this issue, researchers isolated DON from dissolved inorganic nitrogen (DIN) and used vacuum ultraviolet (VUV) and hydrogen peroxide to convert DON into nitrate for analysis. This method has improved analytical precision and lower MDL compared to conventional methods.
Article
Environmental Sciences
Weiguo Zhou, Junde Dong, Dewen Ding, Lijuan Long, Anning Suo, Xiancheng Lin, Qingsong Yang, Liyun Lin, Yanying Zhang, Juan Ling
Summary: This study investigated the impact of inorganic nitrogen on the rhizosphere microbiome of seagrass through high-throughput sequencing, revealing shifts in relative abundance of specific microbial communities under inorganic nitrogen enrichment. Additionally, it was found that seagrass photosynthetic characteristics were influenced by different nitrogen sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Tyler J. Harrow-Lyle, Wai Ying Lam, Erik J. S. Emilson, Robert W. Mackereth, Carl P. J. Mitchell, Stephanie J. Melles
Summary: Methyl mercury (MeHg) concentrations in boreal headwater streams in Ontario, Canada are influenced by natural processes and disturbances such as forestry management. This study used a structural equation modelling approach to assess the impact of catchment characteristics and stream water chemistry on MeHg concentrations in the Dryden - Wabigoon Forest region. The results identified nitrate concentrations, water temperature, and latent watershed characteristics as important drivers of MeHg concentrations. Two plausible pathways for MeHg concentration were described: indirect effect of forest-derived nutrients increasing in-situ MeHg production, and direct supply of MeHg from inundated soils following precipitation and inundation events.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
David S. Pal, Rajan Tripathee, Matthew C. Reid, Karina V. R. Schafer, Peter R. Jaffe
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2018)
Article
Multidisciplinary Sciences
Shan Huang, Peter R. Jaffe
Article
Environmental Sciences
Vahid Razaviarani, Melany Ruiz-Uriguen, Peter R. Jaffe
WASTE AND BIOMASS VALORIZATION
(2019)
Article
Environmental Sciences
Ayla Bilgin, Peter R. Jaffe
WASTE AND BIOMASS VALORIZATION
(2019)
Article
Environmental Sciences
Jinyi Ge, Shan Huang, Il Han, Peter R. Jaffe
ENVIRONMENTAL POLLUTION
(2019)
Article
Environmental Sciences
Weitao Shuai, Peter R. Jaffe
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Vahid Razaviarani, Juan A. Zazo, Jose A. Casas, Peter R. Jaffe
Article
Engineering, Environmental
Shan Huang, Peter R. Jaffe
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Agricultural Engineering
Shan Huang, Zhaoming Zheng, Qingqing Wei, Il Han, Peter R. Jaffe
BIORESOURCE TECHNOLOGY
(2019)
Article
Chemistry, Physical
Juan A. Zazo, P. Garcia-Munoz, G. Pliego, Jefferson E. Silveira, P. Jaffe, Jose A. Casas
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Review
Environmental Sciences
Matthew W. Sima, Peter R. Jaffe
Summary: This review summarizes recent developments in PFAS modeling for various chemical, physical, and biological processes, including sorption, volatilization, degradation, bioaccumulation, and transport. It is found that PFAS transport in the soil-water environment is influenced by various physical, chemical, and biological processes, highlighting the importance of accurate model parameters to predict the fate and remediation efficiency of PFAS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Shan Huang, Arianna Sherman, Chen Chen, Peter R. Jaffe
Summary: The study found that storm disturbances can have significant impacts on the nitrogen and iron cycles and associated microbial communities in estuary systems. Increases in nutrient concentrations immediately after storm resulted in extensive changes in the microbial community. Over time, both the chemical profile and microbial community components returned to baseline conditions.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Shan Huang, Matthew Sima, Ying Long, Courtney Messenger, Peter R. Jaffe
Summary: The study shows that anaerobic incubation of PFAS contaminated biosolids, after augmentation with Fe(III) and Acidimicrobium sp. Strain A6 can result in PFAS defluorination, reducing the concentration of PFOA.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Melany Ruiz-Uriguen, Weitao Shuai, Shan Huang, Peter R. Jaffe
Summary: This study found that Acidimicrobiaceae sp. strain A6 can biodegrade PFAS by utilizing the anode in microbial electrolysis cells (MECs), which lays the foundation for further research on A6-based PFAS bioremediation in water treatment.
Article
Engineering, Environmental
Melany Ruiz-Uriguen, Daniel Steingart, Peter R. Jaffe
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2019)