Humic acid-coated hydrated ferric oxides-polymer nanocomposites for heavy metal removal in water

Hao, Liteng; Li, Li; Yu, Sujuan; Liu, Jingfu

doi:10.1016/j.scitotenv.2022.155427

Cited by 17 publications

(3 citation statements)

References 37 publications

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“…The Freundlich adsorption isotherm model is an empirical formula for multilayer adsorption that is suitable for inhomogeneous physicochemical adsorption on the surface of the adsorbent. The modeling equation is as follows: (5) where q e (mg g −1 ) is the adsorption equilibrium capacity, C e (mg L −1 ) is the adsorbent equilibrium concentration, k F (L g −1 ) is the Freundlich constant, n is the adsorption strength, and n is the Freundlich constant related to the adsorption strength, and its value can reflect the difficulty of the adsorption process. Continuous Filtration and Cycle Experiments.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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3D Wood Microfilter for Fast and Efficient Removal of Heavy Metal Ions from Water

He,

Zhao,

Sun

et al. 2023

Langmuir

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Adsorption is an effective method for the treatment of heavy metal ions in water; however, the existing adsorbents are complicated to prepare, and costly and difficult to recover. In this work, a 3D wood microfilter was prepared by modifying wood for the removal of heavy metal contaminants from water. First, a green deep eutectic solvent was used to remove lignin from beech wood. Then citric acid and l-cysteine were sequentially used to graft carboxyl and sulfhydryl groups (−SHs) on the surface of cellulose. Finally, a three-dimensional wood microfilter with an abundant porous structure and adsorption sites was formed. The adsorption kinetics and adsorption isotherms of heavy metal ions on the 3D wood microfilter were systematically investigated using Cu2+ and Cd2+ as model species. The results showed that the 3D wood microfilter had a fast adsorption rate and high saturation capacity for both Cu2+ and Cd2+. Based on the advantages of easy processing and multilayer assembly and stacking, a three-layer wood microfilter was designed to achieve high flux rate (1.53 × 103 L m–2 h–1) and high efficiency (>98%) for the removal of heavy metal ions in water. The enhancement mechanism of the adsorption process of Cu2+ and Cd2+ by the 3D wood microfilter was investigated using SEM and EDS, FTIR, and XPS characterization. The simple synthesis method and high adsorption efficiency of this wood microfilter provide a new strategy for the preparation of cheap, efficient, and recyclable adsorbents for heavy metal ions in water.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Currently, the effective methods for removing heavy metal ions in water mainly include an electrochemical method, ion exchange method, chemical precipitation method, and membrane process . However, the above methods are expensive to manufacture, difficult to remove fouling, and difficult to recycle .…”

Section: Introductionmentioning

confidence: 99%

3D Wood Microfilter for Fast and Efficient Removal of Heavy Metal Ions from Water

He,

Zhao,

Sun

et al. 2023

Langmuir

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“…To solve the above problems, nanomaterials of various sizes have been used to develop nano-based membranes. These nanomaterials include polymeric nanocomposites [13], metal/metal oxide NPs [14], polymer/metal/metal oxide NPs [15], zeolites [16], carbon nanotubes [17], graphene/graphene oxide (GO) [18], transition metal dichalcogenide-based nanosheets [19], two-dimensional (2D) MXene nanosheets [20], and metal-organic frameworks [21]. In Figure 2, the utilization of nanomaterials with varied dimensions in the development of nano-adsorbents is presented.…”

Section: An Overview Of the Nano-membrane Systemsmentioning

confidence: 99%

Nanostructures in Water Purifications

Karakuş,

M.M. Elnashar

2024

Environmental Sciences

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Effective water purification strategies are essential in addressing the serious global concern of scarce water. Nanomaterials have recently garnered considerable interest due to their excellent chemical, mechanical, physical, and biological properties, making them promising candidates for use in water filtration systems. Nanomaterials, with their high hydrophilicity, surface area, and variable surface characteristics, have shown potential in removing water-based contaminants. This review provides an overview of current developments in the development of nano-membrane materials for filtration systems. We discuss various kinds of nanoplatforms, such as polymeric nanocomposites, MXene nanosheets, metal/metal oxide nanoparticles (NPs), carbon nanotubes, metal–organic frameworks, nanofibers, and nanotubes, and their mechanisms of action in removing impurities. Furthermore, we summarize the possibilities and challenges associated with the use of nano-membrane systems, including potential environmental impacts and the need for sustainable and affordable production technologies. Overall, the application of nanomaterials in purifying water shows great potential for providing safe and clean drinking water to people around the world.

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Facile synthesis of a novel nanocomposite for determination of mercury and copper ions in food and water samples

Al-Wasidi

AlSalem

Alshalawi

et al. 2022

Arabian Journal of Chemistry

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Humic acid-coated hydrated ferric oxides-polymer nanocomposites for heavy metal removal in water

Cited by 17 publications

References 37 publications

3D Wood Microfilter for Fast and Efficient Removal of Heavy Metal Ions from Water

3D Wood Microfilter for Fast and Efficient Removal of Heavy Metal Ions from Water

Nanostructures in Water Purifications

Facile synthesis of a novel nanocomposite for determination of mercury and copper ions in food and water samples

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