Capacitive Removal of Heavy Metal Ions from Wastewater <i>via</i> an Electro-Adsorption and Electro-Reaction Coupling Process

Mao, Minlin; Yan, Tingting; Shen, Junjie; Zhang, Jianping; Zhang, Dengsong

doi:10.1021/acs.est.0c07849

Cited by 176 publications

(71 citation statements)

References 55 publications

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“…The electrochemical impedance spectroscopy (EIS) results (Figure S8B) (see the top left inset in Figure S8B), confirming that MgB/C has the highest interfacial ion migration rate among these electrodes, and thereby the best capacitive performance. 34,48 Capacitive Deionization Performance.…”

Section: B Cmentioning

confidence: 99%

Ion Exchange Conversion of Na-birnessite to Mg-buserite for Enhanced Cu2+ Removal via Membrane Capacitive Deionization (MCDI)

Bao

Jin

et al. 2021

Preprint

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Layered manganese oxides (LMOs) have recently been demonstrated to be one of the most promising redox-active material platforms for electrochemical removal of heavy metal ions from solution via capacitive deionization (CDI). However, the impacts of phase transformation behaviors of the LMOs minerals, especially during the desalination operations, on the deionization performance of the LMOs/Celectrodes have yet to be extensively evaluated. In this study, Mg-buserite derived from ion exchange of fresh Na-birnessite, Na-and K-birnessite were systematically evaluated as active electrode materials for removal of copper (Cu 2+ ) ions from synthetic saline in a symmetric membrane capacitive deionization (MCDI) cell. In the cases of Na + , K + , Mg 2+ , and Ca 2+ ions, the Mg-buserite/C electrode demonstrated the best deionization performance in terms of the salt and/or ion adsorption capacity, electrosorption rate, charge efficiency, and cycling stability, followed by K-birnessite/C, and then Na-birnessite/C. More importantly, the Mg-buserite/C electrode also exhibited the highest Cu 2+ ion adsorption capacity (IAC) of 89.3 mg Cu 2+ /g active materials at a cell potential of 1.2 V in 500 mg L −1 CuCl2 solution, with an IAC retention as high as 96.3% after 60 electrosorption/desorption cycles. The underlying mechanisms for Cu 2+ sequestration were investigated via ex-situ X-ray diffraction, indicating that the improving deionization performance toward Cu 2+ from solution is mainly attributed to the expanded interlayer spacing through ion exchange of the original stabilizing Na + ions of Na-birnessite with foreign Mg 2+ ions, leading to a phase transformation from Na-birnessite into Mg-buserite that has larger ion diffusion channels and a higher ion storage capacity. Our work has demonstrated that expansion of interlayer spacing of LMOs minerals via ion exchange is a reliable and solid strategy for improving the desalination performance in CDI platforms, and provided insight for the rational design of smart electrodes for CDI applications towards heavy metal ion sequestration.

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Section: B Cmentioning

confidence: 99%

Ion Exchange Conversion of Na-birnessite to Mg-buserite for Enhanced Cu2+ Removal via Membrane Capacitive Deionization (MCDI)

Bao

Jin

et al. 2021

Preprint

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“…These dissolved heavy metal ions in water can cause adverse effects on aquatic ecosystems. Long−term exposure to water which has been contaminated by heavy metals can cause serious harm to human health [3][4][5][6]. Lead ion (Pb 2+ ) is a common pollutant in industrial wastewater, which can cause human dysfunction or serious lesions if ingested in large quantities or for a long time [7,8].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Performance of Amino Functionalized Magnetic Molecular Sieve Adsorbent for Effective Removal of Lead Ion from Aqueous Solution

Guo

Wang

et al. 2021

Nanomaterials

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Lead ion (Pb2+) has high toxicity and brings great harm to human body. It is very important to find an effective method to address lead ion pollution. In this work, amino functionalized CoFe2O4/SBA–15 nanocomposite (NH2–CoFe2O4/SBA–15) was prepared for the effective removal of Pb2+ from aqueous solution. The prepared NH2–CoFe2O4/SBA–15 adsorbent was manifested by using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectrum (FTIR), X-ray powder diffraction (XRD), and Brunauer-Emmett-Teller (BET) analysis. In the meantime, the adsorption conditions, including pH, adsorbent dosage, and adsorption time, were studied. The investigation of adsorption kinetics revealed that the adsorption results conform to the pseudo-first-order kinetic model. The adsorption isotherms research displayed that the adsorption was consistent with the Freundlich model, demonstrating that the adsorption for Pb2+ with the prepared adsorbent was a multimolecular layer adsorption process. In addition, the thermodynamic investigations (ΔG < 0, ΔH > 0, ΔS > 0) demonstrated that the adsorption for Pb2+ with the prepared adsorbent was endothermic and spontaneous. Moreover, the prepared adsorbent showed superior anti-interference performance and reusability, implying the potential application of the adsorbent in actual water treatment. Furthermore, this research may provide a reference and basis for the study of other heavy metal ions.

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“…Urban, agrarian and industrial WW treatment technologies can be classified into physical, chemical and biological methods, each of which have its own advantages and disadvantages [ 13 ]. Heavy metals are removed from WW by methods such as membrane filtration, chemical precipitation, adsorption, chelation, and ion exchange [ 14 , 15 ]. It should also be noted that heavy metals are widely used in modern technologies and the demand for heavy metals is constantly growing.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and electric field accelerate Phytoextraction of copper Lemna minor duckweed

Politaeva

Badenko

2021

PLoS ONE

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In accordance with the opinion of the World Health Organization and the World Water Council the development of effective technologies for the treatment of wastewater from heavy metals for their discharge into water bodies or reuse is an urgent task nowadays. Phytoremediation biotechnologies is the most environmentally friendly and cheapest way of the treatment of wastewater, suitable for sustainable development principals. The main disadvantage of the phytoremediation is the slow speed of the process. A method for accelerating the process of phytoremediation by the combined effect of magnetic and weak electric fields is proposed. The purpose of this study is to determine the values of the parameters of the magnetic and weak electric fields that are most suitable for extracting cuprum ions from wastewater using the higher aqua plants (Lemna minor). A corresponding technological process based on the results of the study is proposed. The results have shown that the removal of copper cations from sulfate solutions effectively occurs in the initial period of time (1–5 hours) under the influence of a magnetic field with an intensity of H = 2 kA/m. Under the combined influence of an electrical current with density j = 240 μA/cm2 and a magnetic field (H = 2 kA/m) the highest rate of copper extraction by duckweed leaves is achieved. Under these conditions, the greatest growth and development of plant leaves occurs. The paper presents the results of determining of the parameters of the electrochemical release from the eluate of the spent phytomass of duckweed. It has been determined that the release of metal occurs at E = 0.32 V. An original scheme for wastewater treatment from copper with subsequent separation of copper from the spent phytomass of duckweed is proposed. In general, the presented results are a scientific justification of wastewater treatment technologies and a contribution to resolving the crisis in the field of fresh water supply. An important contribution in the circular economy is a technology recommendation proposed for recovering copper from duckweed after wastewater treatment.

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Capacitive Removal of Heavy Metal Ions from Wastewater via an Electro-Adsorption and Electro-Reaction Coupling Process

Cited by 176 publications

References 55 publications

Ion Exchange Conversion of Na-birnessite to Mg-buserite for Enhanced Cu2+ Removal via Membrane Capacitive Deionization (MCDI)

Ion Exchange Conversion of Na-birnessite to Mg-buserite for Enhanced Cu2+ Removal via Membrane Capacitive Deionization (MCDI)

Adsorption Performance of Amino Functionalized Magnetic Molecular Sieve Adsorbent for Effective Removal of Lead Ion from Aqueous Solution

Magnetic and electric field accelerate Phytoextraction of copper Lemna minor duckweed

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