Removal of heavy metal ions from wastewater by capacitive deionization using polypyrrole/chitosan composite electrode

Zhang, Yujie; Xue, Quanqin; Li, Fēi; Dai, Jizhe

doi:10.1177/0263617418822225

Cited by 35 publications

(18 citation statements)

References 29 publications

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“…Adsorption is the most efficient and extensively-used removal method. Commonly-used adsorbents are comprised of activated carbon [1,13], zeolite [14], biomasses [15,16], polymers [17,18], and polymer composites [19,20]. However, activated carbon is one of the most effective adsorbents due to its simplicity, high capacity, and ability to remove low concentrations of lead [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption of Lead (II) from Aqueous Phase Solutions Using Polypyrrole-Based Activated Carbon

et al. 2019

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In this study, polypyrrole-based activated carbon was prepared by the carbonization of polypyrrole at 650 °C for 2 h in the presence of four-times the mass of KOH as a chemical activator. The structural and morphological properties of the product (polypyrrole-based activated carbon (PPyAC4)), analyzed by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and thermogravimetric analysis, support its applicability as an adsorbent. The adsorption characteristics of PPyAC4 were examined through the adsorption of lead ions from aqueous solutions. The influence of various factors, including initial ion concentration, pH, contact time, and adsorbent dose, on the adsorption of Pb2+ was investigated to identify the optimum adsorption conditions. The experimental data fit well to the pseudo-second-order kinetic model (R2 = 0.9997) and the Freundlich isotherm equation (R2 = 0.9950), suggesting a chemisorption pathway. The adsorption capacity was found to increase with increases in time and initial concentration, while it decreased with an increase in adsorbent dose. Additionally, the highest adsorption was attained at pH 5.5. The calculated maximum capacity, qm, determined from the Langmuir model was 50 mg/g.

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Section: Introductionmentioning

confidence: 99%

Efficient Adsorption of Lead (II) from Aqueous Phase Solutions Using Polypyrrole-Based Activated Carbon

et al. 2019

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“…[330] Correspondingly, CDI can be investigated and applied for the removal of these heavy metal ions, and some Faradaic electrode materials that have been used in this regard include manganese oxides, [331][332][333] metal hexacyanometalates, [334] and polymers. [142,335,336] For example, Li et al [331] prepared a nanoneedle structured -MnO 2 /carbon fiber paper ( -MnO 2 /CFP) hybrid electrode for removal of Ni 2+ from industrial waste streams. Thanks to the efficient charge transfer via insertion reactions between Ni 2+ ions and MnO 2 hosts, the -MnO 2 /CFP electrode achieved higher removal capacity (16.4 mg Ni 2+ g −1 ) compared to pure CFP electrode (0.034 mg Ni 2+ g −1 ) and AC (2.5 mg Ni 2+ g −1 ).…”

Section: Heavy Metal Removalmentioning

confidence: 99%

Faradaic Electrodes Open a New Era for Capacitive Deionization

et al. 2020

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Capacitive deionization (CDI) is an emerging desalination technology for effective removal of ionic species from aqueous solutions. Compared to conventional CDI, which is based on carbon electrodes and struggles with high salinity streams due to a limited salt removal capacity by ion electrosorption and excessive co-ion expulsion, the emerging Faradaic electrodes provide unique opportunities to upgrade the CDI performance, i.e., achieving much higher salt removal capacities and energy-efficient desalination for high salinity streams, due to the Faradaic reaction for ion capture. This article presents a comprehensive overview on the current developments of Faradaic electrode materials for CDI. Here, the fundamentals of Faradaic electrode-based CDI are first introduced in detail, including novel CDI cell architectures, key CDI performance metrics, ion capture mechanisms, and the design principles of Faradaic electrode materials. Three main categories of Faradaic electrode materials are summarized and discussed regarding their crystal structure, physicochemical characteristics, and desalination performance. In particular, the ion capture mechanisms in Faradaic electrode materials are highlighted to obtain a better understanding of the CDI process. Moreover, novel tailored applications, including selective ion removal and contaminant removal, are specifically introduced. Finally, the remaining challenges and research directions are also outlined to provide guidelines for future research.

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“…Subsequently, picking fitting materials as sorbents can adequately mitigate water contamination by natural colors. As of late, materials acquired from sustainable assets, for example, chitosan, sodium alginate, cellulose, and starch [25], are rising as a potential elective sorbent for metal ions from effluents.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

et al. 2020

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Herein, we report the development of chitosan (CH)-based bio-composite modified with acrylonitrile (AN) in the presence of carbon disulfide. The current work aimed to increase the Lewis basic centers on the polymeric backbone using single-step three-components (chitosan, carbon disulfide, and acrylonitrile) reaction. For a said purpose, the thiocarbamate moiety was attached to the pendant functional amine (NH2) of chitosan. Both the pristine CH and modified CH-AN bio-composites were first characterized using numerous analytical and imaging techniques, including 13C-NMR (solid-form), Fourier-transform infrared spectroscopy (FTIR), elemental investigation, thermogravimetric analysis, and scanning electron microscopy (SEM). Finally, the modified bio-composite (CH-AN) was deployed for the decontamination of cations from the aqueous media. The sorption ability of the CH-AN bio-composite was evaluated by applying it to lead and copper-containing aqueous solution. The chitosan-based CH-AN bio-composite exhibited greater sorption capacity for lead (2.54 mmol g−1) and copper (2.02 mmol g−1) than precursor chitosan from aqueous solution based on Langmuir sorption isotherm. The experimental findings fitted better to Langmuir model than Temkin and Freundlich isotherms using linear regression method. Different linearization of Langmuir model showed different error functions and isothermal parameters. The nonlinear regression analysis showed lower values of error functions as compared with linear regression analysis. The chitosan with thiocarbamate group is an outstanding material for the decontamination of toxic elements from the aqueous environment.

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Removal of heavy metal ions from wastewater by capacitive deionization using polypyrrole/chitosan composite electrode

Cited by 35 publications

References 29 publications

Efficient Adsorption of Lead (II) from Aqueous Phase Solutions Using Polypyrrole-Based Activated Carbon

Efficient Adsorption of Lead (II) from Aqueous Phase Solutions Using Polypyrrole-Based Activated Carbon

Faradaic Electrodes Open a New Era for Capacitive Deionization

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

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