The effective removal of Pb<sup>2+</sup> by activated carbon fibers modified by <scp>l</scp>-cysteine: exploration of kinetics, thermodynamics and mechanism

Zhu, Lingkai; Yao, Yingming; Chen, Dingzhou; Lan, Ping

doi:10.1039/d2ra01521h

Cited by 11 publications

(5 citation statements)

References 62 publications

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“…Even if the C 0 continued to increase, no more DPS molecules could be adsorbed; thus, a dynamic adsorption equilibrium could be obtained. A similar phenomenon can also be found in a previous study [ 59 ]. Figure S1 demonstrates the effect of the pH value on the adsorption properties of the ACF felt for DPS.…”

Section: Resultssupporting

confidence: 90%

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Zhang,

He,

et al. 2024

Polymers

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Activated carbon fibers (ACFs) derived from various polymeric fibers with the characteristics of a high specific surface area, developed pore structure, and good flexibility are promising for the new generation of chemical protection clothing. In this paper, a polyacrylonitrile-based ACF felt was prepared via the process of liquid phase pre-oxidation, along with a one-step carbonization and chemical activation method. The obtained ACF felt exhibited a large specific surface area of 2219.48 m2/g and pore volume of 1.168 cm3/g, as well as abundant polar groups on the surface. Owing to the developed pore structure and elaborated surface chemical property, the ACF felt possessed an intriguing adsorption performance for a chemical warfare agent simulant dipropyl sulfide (DPS), with the highest adsorption capacity being 202.38 mg/g. The effects of the initial concentration of DPS and temperature on the adsorption performance of ACF felt were investigated. Meanwhile, a plausible adsorption mechanism was proposed based on the kinetic analysis and fitting of different adsorption isotherm models. The results demonstrated that the adsorption process of DPS onto ACF felt could be well fitted with a pseudo-second-order equation, indicating a synergistic effect of chemical adsorption and physical adsorption. We anticipate that this work could be helpful to the design and development of advanced ACF felts for the application of breathable chemical protection clothing.

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Section: Resultssupporting

confidence: 90%

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Zhang,

He,

et al. 2024

Polymers

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“…69 Table 3 tabulates the kinetics constant (k id ) and the intercept (C) for each stage. The dried mycelium is comprised of a heterogeneous microporous network, 70 similar to activated carbon, 71 indicating the diffusion and sorption of Pb(II) ions to the inner structures of the porous network, resulting in multistage intraparticle diffusion-dominated behavior. Initially, rapid sorption occurs at the surface hyphae or large pores until saturation is reached at exterior surfaces.…”

Section: Sorption Of Pb(ii) On Dry Mycelium Factors Effecting Pb(ii) ...mentioning

confidence: 99%

Heavy Metal Remediation by Dry Mycelium Membranes: Approaches to Sustainable Lead Remediation in Water

Parasnis,

Deng,

Yuan

et al. 2024

Langmuir

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Lead contamination poses significant and lasting health risks, particularly in children. This study explores the efficacy of dried mycelium membranes, distinct from live fungal biomass, for the remediation of lead (Pb(II)) in water. Dried mycelium offers unique advantages, including environmental resilience, ease of handling, biodegradability, and mechanical reliability. The study explores Pb(II) removal mechanisms through sorption and mineralization by dried mycelium hyphae in aqueous solutions. The sorption isotherm studies reveal a high Pb(II) removal efficiency, exceeding 95% for concentrations below 1000 ppm and ∼63% above 1500 ppm, primarily driven by electrostatic interactions. The measured infrared peak shifts and the pseudosecond-order kinetics for sorption suggests a correlation between sorption capacity and the density of interacting functional groups. The study also explores novel surface functionalization of the mycelium network with phosphate to enhance Pb(II) removal, which enables remediation efficiencies >95% for concentrations above 1500 ppm. Scanning electron microscopy images show a pH-dependent formation of Pb-based crystals uniformly deposited throughout the entire mycelium network. Continuous cross-flow filtration tests employing a dried mycelium membrane demonstrate its efficacy as a microporous membrane for Pb(II) removal, reaching remediation efficiency of 85−90% at the highest Pb(II) concentrations. These findings suggest that dried mycelium membranes can be a viable alternative to synthetic membranes in heavy metal remediation, with potential environmental and water treatment applications.

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“…Supporting Information for this article can be found under DOI: https://doi.org/10.1002/ceat.202200555. This section includes additional references to primary literature relevant for this research [40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Supporting Informationmentioning

confidence: 99%

N‐Doped Porous Carbon with Outstanding Pb²⁺ Adsorption Capacity in Wastewater

Chen

Niu

et al. 2023

Chem Eng & Technol

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An N-doped porous carbon (NPC) with porous structure was successfully prepared by a one-step calcination method. The NPC with its abundant modified active functional groups was used in adsorption experiments, showing that the adsorption capacity of NPC for Pb 2+ was up to 179.86 mg g -1 at pH 5. It displayed a fast kinetic adsorption rate and high selective adsorption and cyclic adsorption capacities. The Pb 2+ adsorption mechanism consisted in cationic-p interactions and electrostatic attraction. Thus, the developed NPC has a high potential for application in the removal of Pb 2+ from wastewater, due to its excellent adsorption behavior and porous structure.

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The effective removal of Pb²⁺ by activated carbon fibers modified by l-cysteine: exploration of kinetics, thermodynamics and mechanism

Abstract: A low-cost fabrication route has been developed to prepare a chemically grafted activated carbon fiber, which effectively removed Pb2+ from solution. Multiple characterisation results indicated that l-cyst-ACF had abundant N-containing and S-containing functional groups.

Cited by 11 publications

References 62 publications

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Heavy Metal Remediation by Dry Mycelium Membranes: Approaches to Sustainable Lead Remediation in Water

N‐Doped Porous Carbon with Outstanding Pb²⁺ Adsorption Capacity in Wastewater

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The effective removal of Pb2+ by activated carbon fibers modified by l-cysteine: exploration of kinetics, thermodynamics and mechanism

Abstract: A low-cost fabrication route has been developed to prepare a chemically grafted activated carbon fiber, which effectively removed Pb2+ from solution. Multiple characterisation results indicated that l-cyst-ACF had abundant N-containing and S-containing functional groups.

Cited by 11 publications

References 62 publications

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide

Heavy Metal Remediation by Dry Mycelium Membranes: Approaches to Sustainable Lead Remediation in Water

N‐Doped Porous Carbon with Outstanding Pb2+ Adsorption Capacity in Wastewater

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Product

Resources

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The effective removal of Pb²⁺ by activated carbon fibers modified by l-cysteine: exploration of kinetics, thermodynamics and mechanism

N‐Doped Porous Carbon with Outstanding Pb²⁺ Adsorption Capacity in Wastewater