Impact of aeration on plant growth-promoting rhizobacteria assisted phytoremediation capability of arsenic in artificial wetland system

International Journal of Phytoremediation, Год журнала: 2025, Номер unknown, С. 1 - 21

Опубликована: Янв. 12, 2025

The increasing demand for sustainable, robust, and cost-efficient arsenic (As) treatment techniques strengthens the implementation of new constructed wetland (CW) designs like aerated CWs in agricultural sector. aim was to assess contrast influence various aeration rates on As elimination subsurface flow CW utilizing Pennisetum purpureum plants treating As-polluted sand. This study consisted an experiment with 16 CW, operating at different concentrations 0, 5, 22, 39 mg kg−1 0.18, 1, 2 L min−1. highest from sand 96.19 ± 3.09%, 93.95 2.17%, 91.91 1.92% As, respectively, 0.18 min−1 aeration. A negative pollution growth detected but grows well polluted Bacterial population enzyme activity showed statistically significant differences aerations all levels. These results suggest that this can be used phytoremediation anthropogenically environments due its high capability uptake As.

Язык: Английский

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Microbial Fuel Cell Technology as a New Strategy for Sustainable Management of Soil-Based Ecosystems

Energies, Год журнала: 2025, Номер 18(4), С. 970 - 970

Опубликована: Фев. 18, 2025

Although soil is mainly perceived as the basic component of agricultural production, it also plays a pivotal role in environmental protection and climate change mitigation. Soil ecosystems are largest terrestrial carbon source greenhouse gas emitters, their degradation result aggressive human activity exacerbates problem change. Application microbial fuel cell (MFC) technology to soil-based such sediments, wetlands, farmland, or meadows allows for sustainable management these environments with energy benefits. ecosystem-based MFCs enable zero-energy, environmentally friendly bioremediation (with efficiencies reaching even 99%), direct clean production from various power 334 W/m2), monitoring quality wastewater treatment wetlands up 99%). They new strategy gas, salinity, metal accumulation This article reviews current state art field application MFC ecosystems, including MFCs, sediment plant CW-MFCs (constructed coupled MFCs).

Язык: Английский

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The Performance of a Multi-Stage Surface Flow Constructed Wetland for the Treatment of Aquaculture Wastewater and Changes in Epiphytic Biofilm Formation

Microorganisms, Год журнала: 2025, Номер 13(3), С. 494 - 494

Опубликована: Фев. 22, 2025

Constructed wetlands play a critical role in mitigating aquaculture wastewater pollution. However, the comprehensive treatment performance of aquatic plants and microorganisms under various water processes remains insufficiently understood. Here, multi-stage surface flow constructed wetland (SFCW) comprising four different plant species, along with aeration biofiltration membrane technologies, was investigated to explore combined effects epiphytic biofilms on removal efficiency across vegetation periods processes. The results demonstrated that total consistently exceeded 60% both periods, effectively intercepting range pollutants present wastewater. Changes period influenced SFCW, system’s ability treat nitrogen becoming more stable over time. pond planted submerged highest July, while emergent showed an increased rate November. played significant enhancing dissolved oxygen levels, thereby improving phosphorus July Additionally, α-diversity bacteria ponds significantly higher compared other ponds. In terms bacterial composition, abundance Firmicutes notably whereas Nitrospirota Acidobacteriota exhibited increase Furthermore, functional genes associated sulfur metabolism, fixation, oxidative phosphorylation displayed temporal variations pond, highlighting growth changes influence expression within biofilms. Our findings suggest integration SFCWs enhances synergistic between microorganisms, helping mitigate adverse impacts ensuring efficient performance.

Язык: Английский

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Horizontal Subsurface Constructed Wetlands for Landfill Leachate Treatment: Substrate Selection and Macrophyte Adaptation Study

Journal of Environmental Engineering, Год журнала: 2025, Номер 151(5)

Опубликована: Фев. 24, 2025

Язык: Английский

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Micro-aeration strategies: Optimizing nitrogen and phosphorus removal in vertical flow constructed wetlands for rural sewage treatment

Journal of Water Process Engineering, Год журнала: 2025, Номер 75, С. 107931 - 107931

Опубликована: Май 15, 2025

Язык: Английский

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Bioenergy-producing two-stage septic tank and floating wetland for onsite wastewater treatment: Circuit connection and external aeration

Journal of Environmental Management, Год журнала: 2024, Номер 359, С. 121011 - 121011

Опубликована: Апрель 27, 2024

This study designed a two-stage, electrode-integrated septic tank-floating wetland system and assessed their pollutant removal performances under variable operational conditions. The two-stage achieved mean organic, nitrogen, phosphorus, coliform percentages of 99, 78, 97%, respectively, throughout the experimental run. metals (chromium, cadmium, nickel, copper, zinc, lead, iron, manganese) ranged between 81 98%. Accumulated sludge, filler media, hanging root mass contributed to removals by supporting physicochemical biological pathways. effluent organic concentration number across were 20 mg/L 1682 CFU/100 mL, during closed-circuit protocol, which was beneath open-circuit-based performance profiles, i.e., 32 2860 respectively. Effluent metals, ranges 9-17 mg/L, 13-24 1-1.5 0.001-0.2 1410-2270 respectively intermittent continuous aeration periods. air supply rate differences influenced depending on associated mechanisms. non-aeration phase produced higher concentrations than periods-based profiles. overall power density production tank 107 596 mW/m

Язык: Английский

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The mechanism of bioelectricity generation from organic wastes: soil/plant microbial fuel cells

Environmental Technology Reviews, Год журнала: 2023, Номер 13(1), С. 76 - 95

Опубликована: Дек. 18, 2023

On a global perspective, organic wastes should be conceived as precious resource that can advantageous and in line with the waste-to-energy concept. Microbial fuel cell (MFC) is an up-and-coming bio-electrochemical technology developed to efficiently generate bioelectricity from various wastes, using microorganisms catalysts. Soil used produce electrical energy MFCs, which transform chemical soil compounds into electricity through catalysis by soil-derived microorganisms. In soil/plant microbial cells (SMFC/PMFC), behaves nutrient-rich anodic medium, of electrochemically active proton exchange membrane (PEM). addition advantages SMFC technology, it faces practical obstacles such low power current density. SMFC/PMFC systems understanding previous work describing their working methods theoretical foundations on they are built. Also, wide variety criteria likely limit performance identified giving brief description components. This study reviews components make up offers suggestions allow illuminate scientific locks continue effectiveness technology. review will provide discussion mechanism SMFC/PMFCs, researchers highlighted one renewable conversion systems, details about some available

Язык: Английский

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Maximizing pollutant removal and greenhouse gas emission reduction in vertical flow constructed wetlands: an orthogonal experimental approach

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(32), С. 44730 - 44743

Опубликована: Июль 2, 2024

Язык: Английский

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Performance evaluation of a pilot wetland system for wastewater treatment

Journal of Engineering Research, Год журнала: 2023, Номер unknown

Опубликована: Дек. 1, 2023

Wetland systems are inexpensive and easy-to-operate wastewater widely used globally at different scales for the safe treatment of wastewater. This study aims to evaluate a pilot-scale vertical flow wetland system treating under loadings. The was constructed using indigenous plants (Imperata cylindrical) operated actual twelve-months. Samples from influent effluent were collected weekly. They analyzed parameters listed in Kuwait Environment Public Authority standards reuse irrigation, such as organic matter, nutrients, heavy metals, microorganisms. results showed that high hydraulic loading rate (1.67 m3/m2.d) phase more efficient than low (1.04 terms organics nutrient removal efficiency. range efficiency matter rates around 48.5-49.0% 59.1-59.1%, respectively. In addition, nutrients 43.7-67.7% 24.7-76.6%, Moreover, metals -134.3-93.8% -1545.7-92.6%, It evident he leaching soil. it found performance closely linked ambient temperature effects during start-up (r = 0.59) 0.43) phases example. While has wider on biota, its pronounced. conclusion, can be treat office efficiently harsh climate conditions with adjustments capacity, rates, operational conditions.

Язык: Английский

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Septage treatment using the First Stage of French Vertical Flow Constructed Wetlands: From the beginning to the closure of the system

Ecological Engineering, Год журнала: 2024, Номер 206, С. 107329 - 107329

Опубликована: Июнь 21, 2024

Язык: Английский

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