A biomimetic SiO2@chitosan composite as highly-efficient adsorbent for removing heavy metal ions in drinking water

Liu, Jinyun; Chen, Yu; Han, Tianli; Cheng, Mengying; Zhang, Wen; Long, Jiawei; Fu, Xiangqian

doi:10.1016/j.chemosphere.2018.09.172

Cited by 70 publications

(16 citation statements)

References 25 publications

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“…Hg(II) can be eluted from Hg(II)-loaded adsorbent with 1 M Na 2 S solution, and apparently, after the reaction with Na 2 S, the adsorbent was synthesized again. A biomimetic SiO2@chitosan composite, presenting a large amount of active sites such as amino and hydroxyl groups, was used as adsorbent material towards heavy metal ions, including Hg(II) (and As(V)) [61]. Following the Langmuir model, the composite had a maximum uptake of 1.02 mmol/g from Hg(II) (2.669 mmol/g in the case of As(V)).…”

Section: 6-diaminopyridine (Pd) and Polyamine Compoundsmentioning

confidence: 99%

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

López

2020

Metals

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Mercury is a toxic metal, thus, it is an element which has more and more restrictions in its uses, but despite the above, the removal of this metal, from whatever the form in which it is encountered (zero valent metal, inorganic, or organic compounds), and from different sources, is of a widespread interest. In the case of Hg(II), or Hg2+, the investigations about the treatment of Hg(II)-bearing liquid effluents (real or in most cases synthetic solutions) appear not to end, and from the various separation technologies, adsorption is the most popular among researchers. In this topic, and in the 2019 year, more than 100 publications had been devoted to this field: Hg(II)-removal-adsorption. This work examined all of them.

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Section: 6-diaminopyridine (Pd) and Polyamine Compoundsmentioning

confidence: 99%

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

López

2020

Metals

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“…The study suggests that both SiO 2 and zeolite work in tandem, where the outer layer consisting of SiO 2 rapidly adsorbs Zn (II) and Pb (II), and it then transports it via diffusion to its zeolite core, greatly enhancing the adsorption capacity. The employment of a non-metallic material that can produce a porous network was also the theme of the study done by Lui et al, where a biomimetic SiO 2 @chitosan composite was effectively able to adsorb As (V) and Hg (II) when compared to singular nanomaterial [123].…”

Section: Nanomaterials For Heavy Metal Removalmentioning

confidence: 99%

The Roles of Nanomaterials in Conventional and Emerging Technologies for Heavy Metal Removal: A State-of-the-Art Review

et al. 2019

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Heavy metal (HM) pollution in waterways is a serious threat towards global water security, as high dosages of HM poisoning can significantly harm all living organisms. Researchers have developed promising methods to isolate, separate, or reduce these HMs from water bodies to overcome this. This includes techniques, such as adsorption, photocatalysis, and membrane removal. Nanomaterials play an integral role in all of these remediation techniques. Nanomaterials of different shapes have been atomically designed via various synthesis techniques, such as hydrothermal, wet chemical synthesis, and so on to develop unique nanomaterials with exceptional properties, including high surface area and porosity, modified surface charge, increment in active sites, enhanced photocatalytic efficiency, and improved HM removal selectivity. In this work, a comprehensive review on the role that nanomaterials play in removing HM from waterways. The unique characteristics of the nanomaterials, synthesis technique, and removal principles are presented. A detailed visualisation of HM removal performances and the mechanisms behind this improvement is also detailed. Finally, the future directions for the development of nanomaterials are highlighted.

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“…Various adsorbents have been applied in the field of disposal of the waste water containing heavy metal ions. Including activated carbon, zeolite, Chitosan, ion‐exchange resin, nano metal oxide, composite adsorbent, etc [10–27] …”

Section: Introductionmentioning

confidence: 99%

Preparation of Poly(acrylic acid) ‐Boron Nitride Composite as a Highly Efficient Adsorbent for Adsorptive Removal of Heavy Metal Ions

2021

ChemistrySelect

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The poly(acrylic acid)‐boron nitride composite was prepared by radical initiated polymerization in situ with N,N′‐methylenebisacrylamide (MBAA) as a crosslinker and potassium persulfate (KPS) as an initiator and the structure of poly(acrylic acid)‐boron nitride were characterized by Fourier Transform infrared spectroscopy (FT‐IR), scanning electron microscope (SEM). The ability of poly(acrylic acid)‐boron nitride as adsorbent for adsorptive removal of heavy metal ion from aqueous solutions was investigated. The effects of poly(acrylic acid)‐boron nitride dosage, pH, adsorption time, initial metal ion concentration and temperature on adsorption efficiency were also studied. Kinetics data followed best by pseudo‐second‐order model with the correlation coefficient (R2) of 0.997. The equilibrium adsorption data was well fitted to Langmuir isotherm models for Cu(II). The adsorption capacities (qmax) of poly(acrylic acid)‐boron nitride composite for Cu(II) was 46.72 mg/g. The results of thermodynamic equilibrium constant and the Gibbs free energy indicated the spontaneous nature of the adsorption process.

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A biomimetic SiO2@chitosan composite as highly-efficient adsorbent for removing heavy metal ions in drinking water

Cited by 70 publications

References 25 publications

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

The Roles of Nanomaterials in Conventional and Emerging Technologies for Heavy Metal Removal: A State-of-the-Art Review

Preparation of Poly(acrylic acid) ‐Boron Nitride Composite as a Highly Efficient Adsorbent for Adsorptive Removal of Heavy Metal Ions

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