Water hyacinth as a green and sustainable material for carbon aerogel electrodes utilized in membrane capacitive deionization

Nguyen, Ngan Tuan; Duong, Thuc‐Huy; Phan, Trong-Dat; Truong, Cong Chien; Nguyen, Van Vien; Tran, Tri; Nguyễn, Thanh Tùng; Anh, Tuan Huynh; Hoang, Sy Minh Tuan; Ngo, Hoang Long; Chung, Nguyen Thi Kim

doi:10.1002/clen.202200396

Cited by 5 publications

(4 citation statements)

References 54 publications

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“…The aim behind the mapping of invasive species like water hyacinth is to facilitate the percentage area covered by the particular species for management. It is a well-known fact that water hyacinth is an extensive gregariously growing plant that can invade and impact the aquatic ecosystem, causing several problems to the water quality and its environment, also depleting nutrients and oxygen from surface water (Nguyen et al, 2023). Nguyen et al (2023) suggested that water hyacinth can be utilized for the removal of oil spills, heavy metals, or wastewater nutrients using the hierarchical porous carbon derived from water hyacinth.…”

Section: Discussionmentioning

confidence: 99%

“…It is a well-known fact that water hyacinth is an extensive gregariously growing plant that can invade and impact the aquatic ecosystem, causing several problems to the water quality and its environment, also depleting nutrients and oxygen from surface water (Nguyen et al, 2023). Nguyen et al (2023) suggested that water hyacinth can be utilized for the removal of oil spills, heavy metals, or wastewater nutrients using the hierarchical porous carbon derived from water hyacinth. Hence, strategic management plans and policies have been developed for the eradication of water hyacinth and the conservation of wetland.…”

Section: Discussionmentioning

confidence: 99%

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Vegetation discrimination based on chlorophyll prediction in Marshy wetland using Unmanned Aerial Vehicles

Mohanty,

Pandey,

Singh

et al. 2024

Aquatic Conservation

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Wetlands are an integral part of our global ecosystems and play crucial roles in ecological functions such as carbon sequestration, flood mitigation, water purification, and recreational activities. The Ramsar Convention is the most significant wetland protection pact and is doing tremendous work in conserving wetlands worldwide. However, the wetlands area is still under threat due to anthropogenic activity. The current study utilized drone images, chlorophyll measurements and machine leaning to discriminate and map vegetation at marsh wetland area—the Ramsar site. The high‐resolution, multispectral imagery is acquired using a drone‐mounted MICAsense sensor. Eight spectral indices such as Normalized Difference Water Index (NDWI), Two‐Band Algorithm (2BDA), Normalized Difference Chlorophyll Index (NDCI), Normalized Difference Vegetation Index (NDVI) Enhanced Normalized Difference Vegetation Index (ENDVI), Green Normalized Difference Vegetation Index (GNDVI), and Normalised Difference RedEdge (NDRE) were calculated on the acquired imagery in order to discriminate the different vegetation covers such as floating aquatic vegetation (FAV), open water, and other vegetations types. These include the following: Eichhornia, Nymphea, Oleracea, Paspalam, and Oryza from agriculture land at the study site. Two models (viz., the Taylor plot and the Lek Profile methods) were employed to assess the sensitivity of the spectral indices for prediction of chlorophyll and vegetation discrimination. It is inferred from both methods that NDCI was most sensitive for chlorophyll prediction of vegetation followed by NGRDI/ ENDVI/ 2BDA and NDVI for chlorophyll prediction in wetland ecosystems. Further, three machine learning algorithms, support vector machine (SVM), random forest (RF), and gradient tree boost (GTB), were utilized for classification, and the performance accuracy of GTB was found to be the highest (0.893), followed by RF (0.851) and SVM (0.723). The GTB algorithm was applied over NDCI for vegetation discrimination. The study revealed that Eichhronia sp. is abundantly present at the study site; hence, strategic management plans should be carried out for the eradication of invasive species and proper management of wetland vegetation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Vegetation discrimination based on chlorophyll prediction in Marshy wetland using Unmanned Aerial Vehicles

Mohanty,

Pandey,

Singh

et al. 2024

Aquatic Conservation

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“…For this purpose, the most common and widely used material is AC 7 . However, the utilization of other types of carbonaceous materials, especially environmentally friendly ones (e.g., corn-stalk-based 8 , 9 and water hyacinth-based 10 carbon aerogels) as well as conventional ones (e.g., mesoporous carbon 11 , graphene 12 , and carbon nanotubes 13 ), the addition of metal oxide nanoparticles (e.g., TiO 2 14 , SiO 2 , Al 2 O 3 15 , and ZnO 16 ), and conductive polymers (e.g., polyaniline 17 and sulfonated polystyrene 18 ) to the carbonaceous structures of the electrodes were carried out to achieve a higher specific capacity, lower charge transfer resistance, more hydrophilicity, and better wettability. This leads to improved electrochemical performance in the CDI process 19 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced brackish water desalination in capacitive deionization with composite Zn-BTC MOF-incorporated electrodes

Ghorbanian,

Rowshanzamir,

Mehri

2024

Sci Rep

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In this study, composite electrodes with metal–organic framework (MOF) for brackish water desalination via capacitive deionization (CDI) were developed. The electrodes contained activated carbon (AC), polyvinylidene fluoride (PVDF), and zinc-benzene tricarboxylic acid (Zn-BTC) MOF in varying proportions, improving their electrochemical performance. Among them, the E4 electrode with 6% Zn-BTC MOF exhibited the best performance in terms of CV and EIS analyses, with a specific capacity of 88 F g−1 and low ion charge transfer resistance of 4.9 Ω. The E4 electrode showed a 46.7% increase in specific capacitance compared to the E1 electrode, which did not include the MOF. Physicochemical analyses, including XRD, FTIR, FESEM, BET, EDS, elemental mapping, and contact angle measurements, verified the superior properties of the E4 electrode compared to E1, showcasing successful MOF synthesis, desirable pore size, elemental and particle-size distribution of materials, and the superior hydrophilicity enhancement. By evaluating salt removal capacity (SRC) in various setups using an initially 100.0 mg L−1 NaCl feed solution, the asymmetric arrangement of E1 and E4 electrodes outperformed symmetric arrangements, achieving a 21.1% increase in SRC to 6.3 mg g−1. This study demonstrates the potential of MOF-incorporated electrodes for efficient CDI desalination processes.

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“…Therefore, porous carbons derived from various biomass resources, such as corncob [16], corn straw [17], pomelo peel [18], celery [19] and rice straw [20] have been exploited for high-performance EDLC. Among them, carbon aerogel is one of carbon materials showing good electrochemical energy storage performance due to 3D hierarchical pores with tunable porous structure, high specific surface area and good conductivity, facilitating ions efficient diffusion in the carbon network [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Porous Carbon Aerogel Derived from Sodium Alginate for High Performance Electrochemical Capacitor Electrode

Li,

Lai,

et al. 2023

Processes

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To improve the performance of electrochemical capacitors, there is a notable focus on carbon materials characterized by a large surface area, reasonable pore size, pore size distribution, appropriate electronic conductivity, and excellent chemical durability. Herein, the hierarchical porous carbon aerogel originating from sodium alginate (SA) with well-defined porosity are proposed. The resultant hierarchical porous carbon aerogel shows a substantial specific surface area of 2050.6 m2 g−1 with macropores, mesopores and micropores confirmed by techniques such as TEM, SEM, BET, etc., resulting from a sequence of aerogel formation-carbonization-activation. By electrochemical measurement, the hierarchical porous carbon aerogel exhibits a specific capacitance of 204 F g−1 at an operating current density of 0.2 A g−1 employing 6 M KOH aqueous solution. The hierarchical carbon aerogel displays outstanding cycling stability with a 96.2% capacity maintenance for 10,000 cycles at an operating current density of 1 A g−1. This study presents a viable method for for preparing hierarchical porous carbon aerogel derived from biopolymer for electrochemical capacitors.

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Water hyacinth as a green and sustainable material for carbon aerogel electrodes utilized in membrane capacitive deionization

Cited by 5 publications

References 54 publications

Vegetation discrimination based on chlorophyll prediction in Marshy wetland using Unmanned Aerial Vehicles

Vegetation discrimination based on chlorophyll prediction in Marshy wetland using Unmanned Aerial Vehicles

Enhanced brackish water desalination in capacitive deionization with composite Zn-BTC MOF-incorporated electrodes

Hierarchical Porous Carbon Aerogel Derived from Sodium Alginate for High Performance Electrochemical Capacitor Electrode

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