Article
Soil Science
Nadine Loick, Elizabeth Dixon, G. Peter Matthews, Christoph Mueller, Veronica S. Ciganda, Maria Lopez-Aizpun, Miguel A. Repullo, Laura M. Cardenas
Summary: This study quantifies the production and consumption pathways of N2O in soil using labelled substrate-N, showing the impact of different water filled pore space on N-transformation processes and emissions. The research highlights the importance of heterotrophic nitrification and denitrification in the N2O emissions, demonstrating the complex relationship between water filled pore space and nitrogen transformations.
Article
Engineering, Environmental
Yingrui Liu, Yanying He, Feng Chen, Shuqi Ren, Tianhang Zhao, Tingting Zhu, Yiwen Liu
Summary: This study discovered the mechanism of electron competition affecting N2O reduction capacity in two denitrifying biofilm-based systems, and uncovered the role of flocs for mitigating N2O production with varying exogenous organic carbon levels. The results showed that substrate diffusion restriction of biofilms deteriorated electron donors availability, leading to fiercer electron competition in the single denitrifying biofilm system. In contrast, flocs from the denitrifying biofilm/flocs system efficiently reduced overall N2O accumulation by 32%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Yijing Ding, Yanan Wang, Xushun Gu, Yuanyuan Peng, Shanshan Sun, Shengbing He
Summary: The study found that a salinity of 7% and 10% can promote the organic carbon release from reed biomass. The highest nitrate removal was observed at a salinity of 7%, and this removal rate increased from 54.06% to 74.37% after adding reed biomass. Additionally, the lowest nitrous oxide emission flux was also observed at this salinity, with a rate of 0.23 mg/(m2 h). Microbiological analysis showed that salinity had an impact on the microbial community, with an increase in the relative abundance of Chloroflexi and Actinobacteria and a decrease in Proteobacteria. The main functional genera of denitrification also changed with increasing salinity.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhao Li, Fadong Li, Qiuying Zhang, Jianqi Wang, Peifang Leng, Chao Tian, Xiaoyan Li
Summary: This study focused on evaluating the accumulation of NO3- and N2O in groundwater and its indirect emission factor under different land use types in Dexing, revealing that agricultural activities significantly affect the temporal and spatial variation of N2O in groundwater. Through comprehensive evaluation of anion conditions and N2O in groundwater, this study can help estimate indirect N2O emissions and constrain the global nitrogen budget.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Soil Science
Kari A. Wolf, Christen D. Borgesen, Finn Plauborg, Soren O. Petersen
Summary: This one-year study investigated the impacts of autumn- vs. spring- application of pig slurry and the use of a nitrification inhibitor on nitrogen transport and transformations in soil. Results showed evidence of nitrate removal and high denitrification activity in autumn-applied slurry, as well as higher N2O emissions and lower crop yields compared to spring application. The study highlighted the importance of considering transport and transformations of nitrogen in subsoil for understanding N leaching and N2O emissions.
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
Veeraswamy Davamani, Ramesh Poornima, Subramanian Arulmani, Ettiyagounder Parameswari, Joseph Ezra John, Mohan Deepasri
Summary: The impact of nitrous oxide emissions from fertilized agro-ecosystems is a growing concern, but controlling fertilizer requirements and using nitrification inhibitors can effectively reduce N2O emissions. In irrigated tomato cultivation, the use of potassium thiosulfate and neem-coated urea resulted in lower N2O emissions and increased nitrogen retention.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agriculture, Multidisciplinary
J. C. Dlamini, L. M. Cardenas, E. H. Tesfamariam, R. M. Dunn, N. Loick, A. F. Charteris, L. Cocciaglia, S. Vangeli, M. S. A. Blackwell, H. R. Upadhayay, J. M. B. Hawkins, J. Evans, A. L. Collins
Summary: Riparian buffer strips play a significant role in reducing nitrogen transfers from agricultural land to freshwater. However, it can lead to increased nitrous oxide production. The study shows that riparian buffer strips with novel deep-rooting grass can potentially address emissions to both water and air.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xiaofei Li, Dengzhou Gao, Ye Li, Yanling Zheng, Hongpo Dong, Xia Liang, Min Liu, Lijun Hou
Summary: This study investigated the mechanisms of nitrous oxide (N2O) production in estuarine and coastal sediments under elevated nitrogen concentration using microbial inhibition, isotope mass balance, and molecular approaches. The results showed that increasing nitrate concentration led to changes in N2O production pathways and enhanced contributions from fungal denitrification and chemodenitrification. Moreover, elevated nitrate concentration also influenced the structure and abundance of nirK-type denitrifiers, which play a key role in N2O production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
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
Biotechnology & Applied Microbiology
Oksana Coban, Olivia Rasigraf, Anniek E. E. de Jong, Oliver Spott, Brad M. Bebout
Summary: This study evaluated the occurrence and rates of major nitrogen cycle processes in intact microbial mats from Elkhorn Slough and Baja California Sur using N-15-labeling techniques. The results showed differences in nitrogen cycling between Elkhorn Slough and Baja mats, with differences in ammonium assimilation rates and nitrate affinity. Additionally, low nitrogen fixation rates in Elkhorn Slough mats suggest other processes contribute to nitrogen availability in these ecosystems.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Ruifeng Yan, Fenfang Wang, Yao Wang, Nengwang Chen
Summary: Global nitrogen pollution has led to increased emissions of nitrous oxide (N2O) in rivers, contributing to climate change. However, the impact of pollution reduction on river N2O production in a warming climate is not well understood. This study conducted field observations and experiments in a coastal urbanized watershed in China to investigate the effect of changing nitrate and temperature on river sediment denitrification (DNF) and N2O production. The results showed that urban river reaches had a higher DNF rate, nitrate removal efficiency, and N2O concentration compared to agricultural river reaches. Microcosmic incubation experiments indicated that the DNF rate and associated N2O production decreased under low nitrate addition, while the nitrate removal efficiency increased. Simulation results demonstrated a nonlinear response of N2O production to nitrate removal from both urban and agricultural sediments, with the DNF rate and N2O production increasing with temperature. A 1-degree Celsius temperature increase offset 18.75% of the N2O reduction by nitrate removal via DNF. These findings suggest that pollution abatement in watersheds contributes to the reduction of global river N2O emissions, although it is partially offset by N2O production caused by global warming.
Article
Biotechnology & Applied Microbiology
Banda Yeny, Texier Anne-Claire, Cuervo-Lopez Flor de Maria
Summary: The study showed that denitrification can be conducted using AMP as an electron donor, but at lower specific rates. At high concentrations of AMP, the production of N2O and carbon intermediates was detected.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Microbiology
Daniel R. H. Graf, Christopher M. Jones, Ming Zhao, Sara Hallin
Summary: The rhizosphere serves as a hotspot for denitrification. Different root systems may influence the assembly of N2O-reducing microbial communities, with competition being more influential than habitat selection.
FEMS MICROBIOLOGY ECOLOGY
(2022)
Article
Environmental Sciences
Morten Lykkegaard Christensen, Anne Hojmark Jakobsen, Cecilie Sofie Kragelund Hansen, Mads Skovbjerg, Rikke Bruun Munk Andersen, Mette Dam Jensen, Kim Sundmark
Summary: This article describes a wastewater treatment plant designed to focus equally on energy production, water quality, and reduced emissions of greenhouse gases. The plant utilizes a disk filter to remove carbon during primary treatment, followed by hydrolysis and centrifugation to produce a hydrolysate centrate that can be used for secondary wastewater treatment or biogas production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)