Article
Environmental Sciences
Jaime Nivala, Scott Wallace, Manfred van Afferden, Roland A. Mueller
Summary: This study reports the seasonal dynamics of evapotranspiration (ET) and evaporation (E) in different subsurface flow treatment wetlands operating in a temperate European climate. The study found that evapotranspiration rates are highly seasonal, and aeration increases both evaporation and evapotranspiration rates. Non-aerated wetlands have the highest percentage of inflow lost to ET due to lower hydraulic load. Wetlands planted with Phragmites display dynamic and highly seasonal values of plant coefficients (K-p), while unplanted systems have a plant scaling factor (PSF) of zero.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yu Lei, Alette Langenhoff, Harry Bruning, Huub Rijnaarts
Summary: This study investigated the removal of micropollutants using nine different support matrix materials in constructed wetlands. The combination of bark and biochar showed the best performance in removing micropollutants.
Article
Environmental Sciences
Fenglin Jin, Zhen Hu, Huaqing Liu, Jixin Su, Jian Zhang, Shuo Wang, Yanhui Zhao
Summary: Substrate clogging is a major challenge in the operation of subsurface flow constructed wetlands (SSF-CWs). This study investigated the impact of substrate clogging on phosphorus (P) accumulation behavior in SSF-CWs. Results showed that increasing clogging degree led to reduced P removal efficiency at low clogging degree, but higher P removal efficiency at high clogging degree. Substrate adsorption was the primary removal pathway in all SSF-CW systems, with higher Fe/Al-P accumulation on the substrate in the highly clogged system.
Article
Ecology
Hafiz Ihsan. U. H. Khan, Otto Schepers, Nicolaas van Belzen, Mireille Martens, Cornelis. K. Groot, Dion. van Oirschot, Frederik Ronsse, Diederik. P. L. Rousseau
Summary: This study successfully enhanced nitrate removal efficiency by adding a carbon source in an aerated horizontal subsurface flow constructed wetland. However, the efficiency of COD removal decreased with higher carbon dosing.
ECOLOGICAL ENGINEERING
(2022)
Article
Environmental Sciences
Xinyi Chen, Fei Zhong, Yue Chen, Juan Wu, Shuiping Cheng
Summary: This study investigates the influence of aeration position and plant species on the performance of constructed wetlands in treating domestic sewage. The results suggest that aerating at the bottom of the first quarter filtration chamber and planting with Iris sibirica can achieve the highest removal efficiency of COD, NH4+-N, and TN.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Engineering, Environmental
Xinwen Zhang, Chengye Feng, Zhenghe Xu, Xinlin Liu, Wancheng Luo
Summary: The study found that coupling partial nitrification (PN) process with vertical flow constructed wetland (VFCW) can positively affect microbial abundance and community. It can change the microbial community structure, promote nitrification and denitrification intensities, and increase the abundance of functional bacteria related to nitrogen and organic matter removal. In addition, it significantly improves the removal efficiencies of pollutants in the wetland.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Water Resources
Y. M. Patil, G. R. Munavalli
Summary: This study assessed the applicability of different reaction kinetic models for the removal of BOD5 and TKN from greywater in subsurface flow constructed wetlands (SSFCW). Experimental data was collected and error analysis was conducted to evaluate the predictive ability of these models. The results suggest that plug flow and K-S* models are more suitable for predicting BOD5 removal. Recommended volumetric reaction rate parameters were provided for the design of SSFCW in tropical climates.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Selvaraj Selvakumar, Kovilpillai Boomiraj, Sivakumar Durairaj, Kumar Veluswamy
Summary: This study compares the effectiveness of biochar systems and conventional subsurface flow systems in treating textile wastewater. The results showed that the biochar system was more efficient in removing heavy metals, reducing total dissolved solids, and neutralizing the alkalinity of the wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Hossein Rajabnia, Ognjen Orozovic, Kenneth Williams, Aleksej Lavrinec, Dusan Ilic, Mark Jones, George Klinzing
Summary: This study proposes a novel methodology to evaluate the behavior of biomass material by examining the ratio of aeration and deaeration time constants. Tests on cottonseed, wood chips, wood pellets, and wheat straw were conducted to investigate their aeration and deaeration behaviors. The results show that the ratio of the aeration and deaeration time constants can be used to predict the likelihood of plug flow in pneumatic conveying of biomass.
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Engineering, Environmental
Xinwen Zhang, Chengye Feng, Zhenghe Xu, Wenhao Yang, Kai Tong, Yubin Wang, Xinlin Liu
Summary: A novel aerated vertical flow constructed wetland (VFCW) using waste gas from PN process was designed to enhance nitrogen removal and reduce N2O and NO2--N in PN process. Compared with unaerated VFCW, NH4+-N and TN removal efficiencies in aerated VFCW were significantly improved by 118.48% and 78.14%, respectively. The aerated wetland mode can effectively eliminate the problem of high NO2-- N and N2O pollution, reducing the NO2--N concentration from 17.07 mg/L to 0.34 mg/L and achieving a N2O removal rate of 88.72%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Ecology
Lorena Aguilar, Leonardo M. Perez, Angel Gallegos, Eva Fores, Carlos A. Arias, Carme Bosch, Maria Verdum, Patricia Jove, Joan de Pablo, Jordi Morato
Summary: The wine industry produces a large amount of wastewater with high levels of organic matter and nutrients. This study used an innovative compact and mobile treatment wetland system with cork as the media to treat the wastewater from a winery. The results showed that intermittent induced aeration improved nitrogen compound removal and stimulated the growth of denitrifying bacteria in the wetland system.
ECOLOGICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Eric D. Roy, Andres O. Torizzo, Marcos L. Kubow, Nisha C. Nadkarni, Thomas M. Adler, Madeline F. Yandow, Finn A. Bondeson, Adrian R. H. Wiegman, Donna M. Rizzo
Summary: Subsurface gravel wetlands (SGW) are commonly used in the Northeast United States for phosphorus (P) control in stormwater. However, knowledge gaps exist regarding their performance and the effects of road salt in cold climates. This study conducted field monitoring and laboratory studies to assess SGW hydraulics, P retention, and chloride dynamics. The results showed reductions in peak flows and flow volumes, net P export in half of the storms monitored, and limited chloride load reductions. Lab experiments revealed limited ability of soils and gravels to influence chloride concentrations but demonstrated potential responses of wetland vegetation to chloride exposure. A testing protocol based on Mehlich-3 P saturation ratio was recommended to guide soil selection and reduce dissolved P leaching risk.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Agricultural Engineering
Mingzhen Zhang, Dong Xu, Guoliang Bai, Taotao Cao, Wei Liu, Ze Hu, Disong Chen, Dongru Qiu, Zhenbin Wu
Summary: The research found that in simulating the clogging process, the treatment performance of wetlands gradually decreased, and the richness of the microbial community was also affected, which may be due to the decrease in dissolved oxygen and accumulation of organic matter.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Pengyu Li, Tianlong Zheng, Lin Li, Xiuyuan Lv, WenJun Wu, Zhining Shi, Xiaoqin Zhou, Guangtao Zhang, Yingqun Ma, Junxin Liu
Summary: Constructed wetland systems are increasingly used for wastewater treatment. In this study, a horizontal subsurface flow constructed wetland (HSCW) system was constructed and a fully connected neural network (FCNN) was designed to simulate and predict the performance of the HSCW. The results showed that the FCNN model performed well, with relative errors and mean absolute errors within acceptable ranges. Sensitivity analysis also indicated the impact of temperature, solar radiation intensity, and rainfall on model accuracy.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
M. C. Moron, L. Pozo-Morales, C. Benito Mora, D. Garvi, J. Lebrato
ENVIRONMENTAL TECHNOLOGY
(2019)
Article
Environmental Sciences
Carlos Benito-Mora, Antonio J. Alonso-Contreras, Dolores Garvi, Laura Pozo-Morales, Maria C. Moron, Julian Lebrato
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2018)
Article
Materials Science, Coatings & Films
Cristina Dominguez-Trujillo, Ana M. Beltran, Maria D. Garvi, Alba Salazar-Moya, Julian Lebrato, Daniel J. Hickey, Jose A. Rodriguez-Ortiz, Paul H. Kamm, Clara Lebrato, Francisco Garcia-Moreno, Thomas J. Webster, Yadir Torres
SURFACE & COATINGS TECHNOLOGY
(2019)
Article
Cell & Tissue Engineering
Francisco Jose Calero Castro, Yaiza Yuste, Sheila Pereira, Maria Dolores Garvin, M. Angeles Lopez Garcia, Francisco Javier Padillo, Fernando de la Portilla
JOURNAL OF TISSUE ENGINEERING AND REGENERATIVE MEDICINE
(2019)
Article
Chemistry, Organic
Antonio Rosales Martinez, Laura Pozo Morales, Emilio Diaz Ojeda
SYNTHETIC COMMUNICATIONS
(2019)
Article
Materials Science, Multidisciplinary
Ana Civantos, Ana M. Beltran, Cristina Dominguez-Trujillo, Maria D. Garvi, Julian Lebrato, Jose A. Rodriguez-Ortiz, Francisco Garcia-Moreno, Juan Cauich-Rodriguez, Julio J. Guzman, Yadir Torres
Article
Engineering, Environmental
M. C. Moron, L. Pozo-Morales, D. Garvi, A. J. Alonso-Contreras, J. Lebrato
JOURNAL OF WATER PROCESS ENGINEERING
(2019)
Article
Chemistry, Organic
Antonio Rosales Martinez, Laura Pozo Morales, Emilio Diaz Ojeda, Maria Castro Rodriguez, Ignacio Rodriguez-Garcia
Summary: This article summarizes the use of titanocene monochloride as a monoelectronic transfer reagent for catalyzing various chemical transformations over the past two decades. It highlights contributions in C-C bond formation, hydrogen-atom transfer, isomerization reactions, and the development of a catalytic cycle for preparing natural terpenes. Additionally, it emphasizes the proposal of this agent as a new green catalyst with broad applications in organic and organometallic chemistry.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Ecology
Alexander M. Cancelli, Frank A. P. C. Gobas
Summary: A mechanistic model was developed to assess the removal efficiency of pollutants in a wetland system, particularly in oil sands process-affected water (OSPW). The model simulated wetland mechanisms of chemical removal and showed that sustained wetland treatment is feasible. It is a helpful tool to evaluate the feasibility of treatment systems and to assess trade-offs in wetland design and operation.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Prakash Singh Thapa, Hiromu Daimaru, Seiji Yanai
Summary: This study assessed the vegetation recovery and erosion condition in a landslide area in central Japan. The results show that the upper slope, where reforestation activities were implemented, has seen significant vegetation recovery and no significant erosion, while the lower slope lacks vegetation and has experienced continued erosion.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Mike Jerauld, Forrest Dierberg, Thomas DeBusk, Scott Jackson, Kevin Grace, John Juston
Summary: The Everglades Stormwater Treatment Areas (STAs) are constructed wetlands built to remove phosphorus (P) from agricultural and urban runoff in support of Everglades restoration. Research shows that the levels of calcium (Ca) and alkalinity (Alk) have an impact on phosphorus removal in these wetlands.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Kalindhi Larios, Stefan Gerber, Rafael Munoz-Carpena, Patrick Inglett, K. Ramesh Reddy, Michael Chimney
Summary: This study modeled the phosphorus biogeochemical dynamics in one of the best performing Everglades treatment wetlands and found that the complexity of the hydrological system significantly affected the simulated water column P concentration. The modeling tool developed in this study can guide future data collection and optimization efforts for treatment wetlands in the Everglades.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Jing Hu, Benjamin Baiser, R. Thomas James, K. Ramesh Reddy
Summary: This study examined the long-term phosphorus retention in Stormwater Treatment Areas (STAs) and identified the factors influencing their performance. The results showed that the operational performance of STAs improved over time. There were notable differences among individual STAs, with the co-precipitation of phosphorus with calcium playing a critical role in one of the STAs. This highlights the complexity of phosphorus removal in STAs and the need for site-specific management strategies.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Odi Villapando, K. R. Reddy, J. King
Summary: The biogeochemical response to different flow conditions within two parallel flow-ways in Everglades Stormwater Treatment Area (STA)-2 was studied. It was found that there was a gradual decrease in the total phosphorus (TP) concentration from inflow to outflow for both emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV) dominated systems, with EAV showing a higher reduction rate. Significant increase in TP concentration was observed in the SAV system under no flow condition, possibly due to the production of particulate phosphorus (PP) through various mechanisms.
ECOLOGICAL ENGINEERING
(2024)