Article
Soil Science
Issifou Amadou, Michel-Pierre Faucon, David Houben
Summary: This study investigated the availability of organic phosphorus compounds adsorbed onto soil minerals and their uptake by plants. The results showed that the availability and uptake of adsorbed organic phosphorus compounds varied depending on the type of mineral and organic phosphorus compound. The uptake of phosphorus from adsorbed organic phosphorus compounds was influenced by the available phosphorus concentration in the rhizosphere rather than the binding strength of the compounds to the mineral surface.
Article
Environmental Sciences
Yanpei Li, Jiao Wang, Ming'an Shao
Summary: Loess Plateau is crucial for maize production in China, thus understanding of soil phosphorus behavior in this region is important. Previous research mainly focused on fertilization, while less attention has been spent on the effects of straw return and soil fauna. This study found that combining earthworm inoculation with straw return can effectively reduce soil P adsorption capacity and increase its available P content.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Yuxin Ding, Qitao Yi, Qirui Jia, Jin Zhang, Zhaona Zhou, Xiao Liu
Summary: This research proposes a novel concept that the phosphorus (P) diffusive fluxes at the sediment-water interface (SWI) of shallow lakes are controlled by the P adsorption-desorption equilibria, with pH as the major regulator. The empirical equation Ce(pH) = Cm/[1 + e-k(pH-pH1/2)] is derived to describe the relationship between the P equilibrium concentration (Ce) and two factor-dependent variables: the algae/cyanobacteria-available P pools of the SWI and the pH in the water column. This research provides a quantitative approach for determining the sediment P criteria of shallow lakes, with sediment iron/aluminium (hydr)oxide-adsorbed P and water depth as two main indicators with ecological implications.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Xiaodi Li, Zhiyong Zhang, Qiang Xie, Deyi Wu
Summary: The study found that algae have an impact on the performance of phosphorus-inactivating agents, but even in the presence of algae, lanthanum modified zeolite (LMZ) is still effective in reducing the concentration of dissolved inorganic phosphorus in water. The addition of LMZ can lower the risk of phosphorus release and improve the effectiveness of phosphorus-inactivating agents.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Furong Yu, Yuekun Ji, Zhiping Li, Yangkun Li, Yue Meng
Summary: This article explored the adsorption-desorption processes of typical heavy metal pollutants in sediments under different conditions and designed different binary competitive adsorption systems to study the competitive adsorption properties of heavy metal contaminants. The sediment adsorption rates for heavy metals were Cu>Pb>Cd>Zn, and the desorption rates were Cd>Cu>Zn>Pb. The removal of organic matter decreased the ability of sediment to sequester heavy metals, and interfering ions had the greatest effect on Cd and the least effect on Pb. The adsorption and desorption of heavy metals in sediments increased with temperature, and the presence of organic matter increased the sequestration ability of sediment for Cd, Pb, Cu, and Zn. Heavy metals also exhibited significant selective adsorption properties.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Marine & Freshwater Biology
Francoise Andrieux-Loyer, Alain Aminot
Summary: This article investigates the kinetics of adsorption-desorption processes of phosphate on sediments using the Langmuir theory. The study has implications for environmental modeling and understanding the cycling of essential nutrients in estuarine and coastal systems.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Marine & Freshwater Biology
Francoise Andrieux-Loyer, Alain Aminot
Summary: This article explores the adsorption-desorption processes of phosphate on sediments using the Langmuir theory. It describes the theoretical developments and applies them to experiments for determining exchangeable phosphate. The results show that partition coefficients and maximum adsorption capacity vary depending on sediment type and content, and can be used as indicators for examining the potential exchange of phosphate with surrounding water. However, the maximum phosphate adsorption capacity derived from the Langmuir equations has a large confidence interval and is not significantly higher than the exchangeable phosphate.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Vivien Hulot, Edouard Metzger, Aubin Thibault de Chanvalon, Aurelia Mouret, Sabine Schmidt, Bruno Deflandre, Sylvain Rigaud, Eric Beneteau, Nicolas Savoye, Philippe Souchu, Yoann Le Merrer, Gregoire M. Maillet
Summary: Despite efforts to control eutrophication in the Loire estuary, summer hypoxia still occurs, impacting water quality. This study aimed to quantify the contribution of the benthic compartment to hypoxia by measuring water-sediment fluxes and understanding seasonal variations. Results showed that stable iron oxide-rich deposits and high nitrate content limit the release of phosphorus, reducing hypoxia. However, during winter floods, sediment erosion and water-sediment exchange exacerbate hypoxia. Overall, this study highlights the importance of the benthic compartment and the need for further research on the estuary's biogeochemical processes.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Barathan Balaji Prasath, Zhi-Rong Lin, Yu-Ping Su, Chen-Xing She, Hong Lin, Chao-Wei Zhang, Hong Yang
Summary: One of the most challenging issues faced by developing countries is the care and management of clean, potable drinking water sources, with a particular need to focus on the impact of phosphorus release on harmful algal blooms. The study revealed potential risks of phosphorus release for drinking water in a lake in Fujian, with various forms of phosphorus influencing the diversity of PAOs.
Article
Green & Sustainable Science & Technology
Tianyu Sun, Kai Fei, Longzhou Deng, Liping Zhang, Xiaojuan Fan, Yanhong Wu
Summary: This study evaluates the kinetics of phosphorus adsorption and desorption in different erodible soils. The results show that weathered granite soil has a higher adsorption capacity for phosphorus compared to laterite and sand soils. Adsorption mainly occurs in the early stage of the reaction, while desorption lasts for a longer period of time. By establishing a phosphorus loss standard curve, the maximum phosphorus loss in the entire region can be predicted and calculated.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Fen Xu, Xiaoxia He, Hong Wang, Rui Yang, Yaoming Li, Jianfei Yuan
Summary: The study found that sediments in agricultural reservoirs are enriched with phosphorus, especially in the upstream and midstream regions, exceeding the heavy pollution standard. Inorganic phosphorus is the predominant fraction, with calcium-bound phosphorus having the highest content. The sediment has weak adsorption capacity for phosphorus and acts as a source of phosphorus in the reservoir. The concentration of released phosphorus in sediments is positively correlated with Fe/Al-bound phosphorus, suggesting it as an effective indicator for phosphorus release potential.
ENVIRONMENTAL ENGINEERING SCIENCE
(2023)
Article
Geochemistry & Geophysics
Issifou Amadou, Michel-Pierre Faucon, David Houben
Summary: This study investigated the adsorption and desorption dynamics of different organic phosphate forms on soil minerals and found that the adsorption capacity of organic phosphate increased with the number of phosphate groups and/or the size of the organic molecule. Iron and aluminum oxides showed higher adsorption capacity than clay minerals, and desorption experiments indicated that adsorption was not fully reversible. Furthermore, the desorption rate and duration varied among different soil minerals and organic phosphate forms.
APPLIED GEOCHEMISTRY
(2022)
Article
Environmental Sciences
Yishan Chen, Lei Huang, Xiaocui Li
Summary: This study investigated the impact of biofilm on phosphorus adsorption of sediment, finding that phosphorus adsorption significantly increased after biofilm growth. The model derived in this study was able to reasonably predict the adsorption characteristics of bio-sediment, highlighting the importance of considering biomass in adsorption isotherms for future studies.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Engineering, Chemical
Xiuxiu Jia, Xue Zhao, Zenghui Bi, Hucai Zhang, Shuquan Huang, Jason Chun-Ho Lam, Wenyan Li, Yongtao Li, Thomas Wagberg, Guangzhi Hu
Summary: In this study, a rod-shaped lanthanum oxychloride decorated porous carbon material, Polyvinylpyrrolidone /LaOCl (PL), was successfully prepared using a novel freeze-drying thermal oxidation method. PL exhibited excellent performance in removing phosphorus (P) from water, with a high adsorption capacity of 90.9 mg P/g and a removal rate exceeding 92.0% over a wide pH range (2.5-11). This study provides a theoretical basis for the preparation of new P adsorbents and technical support for preventing water eutrophication.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Pengda Cheng, Xinguang Zhu, Yi An, Chun Feng
Summary: Sediment-water interfaces are important in lakes and are connected to various environmental and ecological issues. Waves induced by wind can lead to secondary pollution through sediment resuspension. A coupled model was developed to examine sediment resuspension and phosphorus release, considering different sediments with varying adsorption-desorption capabilities. The study found relationships between wind speed, wave characteristics, sediment distribution, and phosphorus concentration. Higher wind speeds were negatively correlated with sediment desorption release. When sediment resuspension occurs under low or moderate wind speeds, there is a sudden increase in phosphorus concentration in the overlying water, hindering diffusion. Phosphorus release is concentrated in a small region, resulting in rapid changes in the water environment.
ACTA MECHANICA SINICA
(2022)
Article
Environmental Sciences
Nejc Coz, Reza Ahmadian, Roger A. Falconer
Article
Environmental Sciences
Giovanni Musolino, Reza Ahmadian, Junqiang Xia, Roger A. Falconer
JOURNAL OF FLOOD RISK MANAGEMENT
(2020)
Article
Environmental Sciences
Bin Guo, Reza Ahmadian, Paul Evans, Roger A. Falconer
Article
Environmental Sciences
Guanghai Gao, Junqiang Xia, Roger A. Falconer, Yingying Wang
Article
Water Resources
Boliang Dong, Junqiang Xia, Meirong Zhou, Shanshan Deng, Reza Ahmadian, Roger A. Falconer
Summary: Accurate prediction of flood inundation processes in urban areas is challenging due to complex street layouts and infrastructures. This study conducted laboratory experiments and numerical simulations to investigate the influences of different infrastructures on flood inundation processes, finding that the sewer system plays a significant role in reducing water depth and flood velocity. The numerical simulations matched well with experimental findings, and certain inlet discharge capacity formulae showed better performance in representing geometric features of street inlets.
ADVANCES IN WATER RESOURCES
(2021)
Article
Energy & Fuels
Jingjing Xue, Reza Ahmadian, Owen Jones, Roger A. Falconer
Summary: A novel Genetic Algorithm model was developed to design the most optimised Tidal Range Schemes for electricity generation, with a new scheme proposed for the Bristol Channel, UK. The comparison showed that the Genetic Algorithm model was capable of achieving similar outcomes to traditional Grid Search methods, while reducing computational time significantly.
Article
Engineering, Environmental
Jonathan King, Reza Ahmadian, Roger A. Falconer
Summary: In response to the environmental and health impacts of population growth and urbanization, legislative measures have been introduced globally, sparking interdisciplinary research. This paper focuses on improving understanding and simulating water quality, particularly in macro-tidal environments, using novel modeling approaches. Recommendations are made for the use of these approaches in future studies.
Article
Engineering, Civil
Zhihua Xie, Binliang Lin, Roger A. Falconer, Andrew Nichols, Simon J. Tait, Kirill V. Horoshenkov
Summary: This paper presents a large-eddy simulation study of turbulent free surface flow over a natural rough bed, investigating the effects of roughness on turbulence properties and free surface dynamics. The study successfully compares predicted results with experimental data, revealing that roughness on the bed generates small waves on the free surface in cases of low submergence.
JOURNAL OF HYDRAULIC RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Bin Guo, Reza Ahmadian, Roger A. Falconer
Summary: This research focuses on investigating the hydro-environmental impacts of a new tidal energy scheme on the Bristol Channel and Severn Estuary, highlighting the importance of full momentum conservation in modeling turbo-machinery effects. The study reveals that the scheme operation decreases high water levels slightly while improving water renewal, with changes in velocity and bed shear stress predicted in different areas.
Article
Environmental Sciences
Boliang Dong, Junqiang Xia, Meirong Zhou, Qijie Li, Reza Ahmadian, Roger A. Falconer
Summary: This study proposes an integrated hydrodynamic model to simulate urban flooding processes and assess flood risks. The model is validated and applied to an actual urban flooding event, with conclusions drawn on the accuracy of the model, the vulnerability of vehicles and humans, and the impact of the sewer drainage system on flood risks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jian Sun, Fanyi Zhang, Xiaofeng Zhang, Binliang Lin, Zuosheng Yang, Bing Yuan, Roger A. Falconer
Summary: Dam-induced sediment reduction has significantly impacted fluvial systems, leading to a substantial decrease in suspended sediment concentration over the years and a shift in the distribution pattern along the mainstream.
WATER RESOURCES RESEARCH
(2021)
Editorial Material
Engineering, Multidisciplinary
Roger A. Falconer
Article
Engineering, Civil
Junqiang Xia, Boliang Dong, Meirong Zhou, Reza Ahmadian, Roger A. Falconer, Qijie Li, Xiaolei Zhang
Summary: This study investigates the conveyance characteristics of a typical street grate inlet through laboratory experiments and theoretical analysis. A unified formula for calculating the discharge capacity of street inlets is proposed and validated using experimental results from previous studies. The results show that the formula has a high predictive accuracy and can be used in numerical modelling and risk management of urban floods.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Thorsten Wagener, Dragan Savic, David Butler, Reza Ahmadian, Tom Arnot, Jonathan Dawes, Slobodan Djordjevic, Roger Falconer, Raziyeh Farmani, Debbie Ford, Jan Hofman, Zoran Kapelan, Shunqi Pan, Ross Woods
Summary: The WISE CDT was established in 2014 with funding from the UK EPSRC and aims to foster innovation and collaboration by training engineers and scientists at the boundary of water informatics, science and engineering. The programme will ultimately graduate over 80 PhD candidates in a non-traditional 4-year UK doctoral programme, integrating teaching and research elements in collaboration with industrial partners. The focus on cohort-based education equips PhD candidates with a wide range of skills through workshops and activities to maximize candidate abilities and experiences.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
G. Musolino, R. Ahmadian, R. A. Falconer
JOURNAL OF HYDROLOGY X
(2020)
