Article
Microbiology
Anna-Neva Visser, Scott D. D. Wankel, Claudia Frey, Andreas Kappler, Moritz F. F. Lehmann
Summary: In this study, the effect of different organic substrates (short-chained organic acids) and the presence/absence of Fe(II) on nitrogen and oxygen isotope fractionation dynamics during nitrate and nitrite reduction were investigated. The results showed that the isotope effects obtained under heterotrophic and mixotrophic growth conditions were very similar and consistent with previous studies, indicating a lack of distinct differences caused by organic substrates and Fe(II).
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Altantsetseg Buyanjargal, Jiyoung Kang, Ji-Hoon Lee, Sung-Wook Jeen
Summary: This study evaluated the efficiency of using woodchips as organic carbon materials to remove nitrate from groundwater. The findings showed that denitrifying bacteria can effectively reduce nitrate by utilizing it as an electron acceptor and woodchips as an electron donor. The study also highlighted the significance of isotopic fractionation and denitrifying bacteria in understanding denitrification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Xue Ping, Yang Xian, Menggui Jin
Summary: This study investigated the impact of bedform migration on nitrate removal in heterogeneous sediments using numerical models. The results showed that mobile bedforms create fluctuations in exchange flux, reducing the penetration depth and residence time of solutes, and resulting in decreased denitrification rate. A larger bedform celerity and a smaller silt fraction led to lower NO3- removal efficiency.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Ziwen Zhou, Zhifang Zhou
Summary: The impact of large reservoir construction on the basin water cycle, ecological environment, and engineering safety needs urgent study. This study focuses on the evolution of the hyporheic zone in the dam site area connecting the basin surface water and groundwater, which is rarely investigated in previous research. The Xiluodu Reservoir is used as a case study and the results show significant changes in the hyporheic zone after impoundment, including expansion of boundaries and flow velocity increase.
JOURNAL OF HYDROLOGY
(2023)
Article
Multidisciplinary Sciences
Xiaoxuan Su, Leyang Yang, Kai Yang, Yijia Tang, Teng Wen, Yingmu Wang, Matthias C. Rillig, Lena Rohe, Junliang Pan, Hu Li, Yong-guan Zhu
Summary: The study found that the plastisphere could serve as a potential source of N2O production and play a unique role in biogeochemical cycling.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jason D. Boettger, Cajetan Neubauer, Sebastian H. Kopf, James D. Kubicki
Summary: The study of isotopic fingerprints in nitrate has provided important insights into the global nitrogen cycle and uncovered new knowledge gaps. Measuring the populations of isotopic homologs of intact NO3- ions shows promise for advancing the understanding of nitrogen cycling processes. The research also found that the isotopic composition of residual nitrate is controlled by the N-O bond-breaking step in Nar dissimilatory nitrate reductase.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Environmental Sciences
Takashi Onodera, Kazuhiro Komatsu, Ayato Kohzu, Gen Kanaya, Motoyuki Mizuochi, Kazuaki Syutsubo
Summary: This study investigated the nitrogen and oxygen stable isotope ratios of nitrate in four different types of advanced wastewater treatment processes, revealing spatial variations within the treatment steps. The study found that the changes in delta N-15 and delta O-18 of nitrate were related to reactor conditions and the order of treatment processes. Additionally, the study concluded that stable isotope signatures reflected treatment efficiency and effluent characteristics, with the modified Bardenpho process showing higher nitrogen removal efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Zezhen Pan, Yvonne Roebbert, Aaron Beck, Barbora Bartova, Tonya Vitova, Stefan Weyer, Rizlan Bernier-Latmani
Summary: This study investigates the isotope fractionation of uranium (U) during reduction and the mineral dynamics of iron oxides. The results suggest that heavy isotopes preferentially accumulate in reduced U species, while light isotopes are more easily released to the surface or aqueous phase. Moreover, the mineral dynamics of iron oxides may leave an imprint on the isotopic signature.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Olivia Guillin, Emmanuelle Albalat, Caroline Vindry, Elisabeth Errazuriz-Cerda, Theophile Ohlmann, Vincent Balter, Laurent Chavatte
Summary: This study investigated the impact of HIV-1 virus production on cellular zinc homeostasis and isotopic fractionation. The researchers found that HIV-1 captures a significant amount of cellular zinc in newly produced particles, and cells accumulate lighter zinc isotopes from the growth medium. The viruses and producing cells exhibit similar isotopic fractionation. The study also demonstrated that enriched isotopes can be used to trace the fate of zinc in HIV-1 infected cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Civil
Camille Vautier, Benjamin W. Abbott, Eliott Chatton, Thierry Labasque, Jean Marcais, Anniet M. Laverman
Summary: This study used a novel method (MIMS) to continuously characterize biological activity in a stream and compared it with traditional laboratory incubations. The results showed discrepancies between in situ measurements and laboratory incubations, suggesting a potential underestimation of nutrient removal rates in field conditions.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Environmental
Jianxu Wang, Yi Man, Runsheng Yin, Xinbin Feng
Summary: This study investigated the spatial distribution, chemical speciation, and stable isotope compositions of Hg in the soil-Houttuynia cordata system in the Wuchuan Hg mining region in China. The results showed that Hg mainly accumulated in the outer layer of the rhizomes, and existed as Hg-thiolates. The cysteine-extractable soil Hg pool was found to be an important source of Hg for H. cordata. Only a minor amount of Hg in the plant was sourced from surface water.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Manon Lincker, Jennifer L. Druhan, Sophie Guillon, Vincent Lagneau
Summary: The modeling capabilities of geochemical speciation and reactive transport software are advancing, with stable isotopes being increasingly integrated. The major isotope hypothesis is shown to be valid for determining thermodynamic constants in isotopic systems without a major isotope, ensuring the ability to use geochemical speciation codes for isotopic fractionation across a variety of elements.
Article
Engineering, Environmental
Maria Jose De la Fuente, Rodrigo De la Iglesia, Laura Farias, Holger Daims, Michael Lukumbuzya, Ignacio T. Vargas
Summary: This study successfully enriched marine denitrifying microorganisms by applying a specific potential, -260 mV (vs. Ag/AgCl), demonstrating significantly higher nitrate removal compared to other conditions. The polarized electrodes were found to work as external electron donors for nitrate reduction, indicating the feasibility of enriching denitrifying microorganisms without the need for a culture medium, exogenous electron donor, or previously enriched inoculum.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Wei Song, Xue-Yan Liu
Summary: In this study, concentrations and δ15N values of emitted NOx and NO3- from biomass burning were measured in northern China. The study filled the knowledge gap of species-specific δ15N signatures of NOx produced by biomass burning, expanded the understanding of N isotope fractionations during burning processes, and provided critical parameters for isotope source apportionment of NOx and NO3- in the atmosphere.
APPLIED GEOCHEMISTRY
(2023)
Article
Environmental Sciences
Jianghanyang Li, Perry Davy, Mike Harvey, Tanya Katzman, Tamsin Mitchell, Greg Michalski
Summary: This study analyzed the nitrogen isotopic composition of nitrate aerosols collected at Baring Head, New Zealand, and found significant seasonal variations, with lower values in the summer and higher values in the winter. The study also quantified isotopic fractionations during various oxidation processes of NOx, attributing the seasonal variations to the oxidation pathways of NO2. The overall isotopic fractionation factors were found to be lower in the summer and higher in the winter.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)