Adsorption of Pb2+ by inorganic liquid-treated sepiolite: Adsorption process optimization and mechanism analysis via response surface methodology

Gu, Yiming; Feng, Huixia; Wang, Bin; Qiu, Jianhui; Meng, Xuefen; Zhang, Liang; Zhang, Bin; Chen, Nali; Tan, Lin

doi:10.1016/j.micromeso.2023.112821

Cited by 3 publications

(1 citation statement)

References 66 publications

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“…Along with technological advancement, toxic metal contamination has become a severe problem that threatens human health . Lead, mercury, chromium, arsenic, cadmium, zinc, copper, and nickel are the most common contaminants found in contaminated surface water, groundwater, and industrial wastewater. − Exposure to heavy metals imparts serious threats to the ecosphere and human health owing to their high toxicity, nonbiodegradability, and environmental persistence . As a ubiquitous and priority pollutant categorized by the US Environmental Protection Agency (USEPA), Pb(II) is primarily discharged from various sources, including mining, battery and metallurgical manufacturing, printing and painting industries, and smelting operations. − The World Health Organization and the US Environmental Protection Agency have set the permissible limit of Pb(II) concentration in drinking water to be 0.01 and 0.015 mg L –1 .…”

Section: Introductionmentioning

confidence: 99%

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Vo,

Vu,

et al. 2024

ACS Omega

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A new graphene oxide (GO) nanocomposite that contains chitosan, a biological polymer, combined with a magnetic nanoparticle inorganic material (Fe3O4) was successfully prepared and applied for the adsorption of Pb(II) from aqueous solutions. The structural and morphological properties of the GO/Fe3O4/CS (GFC) nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Influent factors for Pb(II) adsorption, including the contacting time, pH of the working medium, working temperature, and adsorbent dosage on the adsorption efficiency, have been optimized. Under optimized conditions, the adsorption isotherm results indicated that the Langmuir model provided a better description for the adsorption of Pb(II) onto the GFC nanosorbent than the Freundlich model. The maximum adsorption capacity (q max) was 63.45 mg g–1. The pseudo-second-order kinetic model (R 2 = 0.999) was fitted with the experimental results, implying that the adsorption of Pb(II) onto GFC is a chemical process. The thermodynamic studies demonstrated the exothermic nature of the adsorption process. Another advantage of the GFC nanosorbent for Pb(II) removal is its capability to be easily recovered under the use of an external magnet and subsequently regenerated. Our work demonstrated that the removal efficiency was stable after several regeneration cycles (i.e., approximately 12% reduction after four successive adsorption–desorption cycles), implying that the GFC nanosorbent exhibits satisfactory regeneration performance. Therefore, with high removal efficiency, high adsorption capacity, and stable reusability, the GFC nanocomposite is a remarkable application potential adsorbent for the in situ treatment of Pb(II) ion-containing aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Vo,

Vu,

et al. 2024

ACS Omega

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Adsorption of Pb(II) from aqueous environment on artificially synthesized mordenite and its biochar composite

Huang,

Lin,

Wang

et al. 2024

Chemical Engineering Journal

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Preparation of biomass carbon dots/carboxymethyl cellulose-based fluorescent hydrogel: combines selective detection and visual adsorption for Copper(II)

Liang,

Feng,

Chen

et al. 2024

Bulletin of the Chemical Society of Japan

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In this study, we used nitrogen-doped carbon dots (NCDs), which were synthesized via the hydrothermal method of corn-stover biomass as raw material and polyethyleneimine (PEI) as the nitrogen source, introduced them into the carboxymethyl cellulose-based hydrogel to prepare an environmentally friendly fluorescent cellulose-based hydrogel (NCDs/CMC-PAM). NCDs/CMC-PAM was also used for simultaneous fluorescence monitoring and removal of Cu (II) in aqueous solution. The chemical and physical structures, adsorption behaviors and fluorescent properties of NCDs/CMC-PAM were investigated. The results showed that NCDs/CMC-PAM exhibited a well-linear response range of fluorescence response for Cu (II) (0∼100 μM, detection limit of 3.42 μM). NCDs/CMC-PAM showed maximum adsorption capacities of 237.71 mg/g for Cu (II), the adsorption process followed the Langmuir isotherm model and pseudo-second-order kinetic model, which is an exothermic spontaneous reaction with an increase in entropy. It can still maintain 79.03% of the original adsorption capacity after six cycles (pH=6). The adsorption mechanisms of NCDs/CMC-PAM for Cu (II) are intraparticle diffusion, electrostatic attraction, ion exchange, and ligand interaction. Hence, the present study provides a new green way to synthesize an adsorbent that can be applied for the adsorption and detection of heavy metal ions.

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Adsorption of Pb2+ by inorganic liquid-treated sepiolite: Adsorption process optimization and mechanism analysis via response surface methodology

Cited by 3 publications

References 66 publications

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Adsorption of Pb(II) from aqueous environment on artificially synthesized mordenite and its biochar composite

Preparation of biomass carbon dots/carboxymethyl cellulose-based fluorescent hydrogel: combines selective detection and visual adsorption for Copper(II)

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Adsorption of Pb2+ by inorganic liquid-treated sepiolite: Adsorption process optimization and mechanism analysis via response surface methodology

Cited by 3 publications

References 66 publications

Fe3O4/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Fe3O4/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Adsorption of Pb(II) from aqueous environment on artificially synthesized mordenite and its biochar composite

Preparation of biomass carbon dots/carboxymethyl cellulose-based fluorescent hydrogel: combines selective detection and visual adsorption for Copper(II)

Contact Info

Product

Resources

About

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water

Fe₃O₄/Graphene Oxide/Chitosan Nanocomposite: A Smart Nanosorbent for Lead(II) Ion Removal from Contaminated Water