Adsorption of Heavy Metals on Activated Carbons (A Review)

Vedenyapina, M. D.; Kurmysheva, Alexandra Yu.; Kulaishin, S. A.; Kryazhev, Yu. G.

doi:10.3103/s0361521921020099

Cited by 16 publications

(6 citation statements)

References 168 publications

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“…This could be due to the nature of pristine active carbons’ surface. It is well established that in carbon-based materials, adsorption is the active mechanism for heavy metals capture [ 32 ]. Capture is mainly dependent on a sorbent material’s specific surface area, pore size, and pore volume, but also the nature of the surface, i.e., the surface functional groups play a fundamental role in the process [ 27 , 41 ].…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, clay materials can be modified by several organic and inorganic treatments to improve their adsorption capacity, as well as their textural structure and surface properties [ 21 , 22 , 23 , 24 , 25 , 26 ]. Similar considerations apply to carbon-based materials [ 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 98%

“…To the best authors’ knowledge, no studies considering such sorbents systems and solution composition have been reported in the literature. Furthermore, different sorbents’ nature, modifiers, solutions concentration and compositions have been reported and studied [ 9 , 18 , 20 , 28 , 32 , 38 , 39 ] Moreover, few papers reported mixed La-Ni solutions [ 15 ] or assessed both capture and release mechanisms [ 8 , 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

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Capture and Release Mechanism of Ni and La Ions via Solid/Liquid Process: Use of Polymer-Modified Clay and Activated Carbons

Cristiani

Bellotto²,

Dotelli

et al. 2022

Polymers

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This study is a starting point for the development of an efficient method for rare earths (REs) and transition metals (TMs) recovery from waste electrical and electronic equipment (WEEE) via a hydrometallurgical process. The capture and release capability of mineral clays (STx) and activated carbons (AC), pristine and modified (STx-L6 and AC-L6) with a linear penta-ethylene-hexamine (L6), towards solutions representative of the process, are assessed in the lab-scale. The solids were contacted with synthetic mono- and bi-ionic solutions containing Ni(II) and La(III) in a liquid/solid adsorption process. Contacting experiments were carried out at room temperature for 90 min by fixing a La concentration at 19 mM and varying the Ni one in the range of 19–100 mM. The four solids were able to capture Ni(II) and La(III), both in single- and bi-ionic solutions; however, the presence of the polyamine always results in a large improvement in the capture capability of the pristine sorbents. For all the four solids, capture behaviour is ascribable to an adsorption or ion-sorbent interaction process, because no formation of aquo- and hydroxy-Ni or La can be formed. The polyamine, able to capture Ni ions via coordination, allowed to differentiate ion capture behaviour, thus bypassing the direct competition between Ni and La ions for the capture sites found in the pristine solids. Release values in the 30–100% range were found upon one-step treatment with concentrated HNO3 solution. However, also, in this case, different metals recovery was found depending on both the sorbent and the ions, suggesting a possible selective recovery.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Capture and Release Mechanism of Ni and La Ions via Solid/Liquid Process: Use of Polymer-Modified Clay and Activated Carbons

Cristiani

Bellotto²,

Dotelli

et al. 2022

Polymers

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“…[6][7][8] Similar studies have been conducted for many years, and their results have been collected in review articles. [9][10][11][12] As a result of the synthesis, various types of porous adsorbents were obtained, such as powdered (PAC), granular (GAC) AC, activated carbon fabric (ACF) and spherical AC (SAC). Especially ones, listed at the end, are gaining now more and more important in adsorption processes due to the possibility of controlling the granule sizes and shapes, ease of dosing them into tanks with impurities removing them after adsorption and their regeneration.…”

Section: Introductionmentioning

confidence: 99%

“…The physicochemical properties and characteristics of AC depend on the kind of substrates used for their synthesis, the method of modification as well as their subsequent activation [6–8] . Similar studies have been conducted for many years, and their results have been collected in review articles [9–12] . As a result of the synthesis, various types of porous adsorbents were obtained, such as powdered (PAC), granular (GAC) AC, activated carbon fabric (ACF) and spherical AC (SAC).…”

Section: Introductionmentioning

confidence: 99%

Studies on the Process of Basic Dyes Adsorption on Uniform Spherical Carbons

Sternik,

Wasilewska,

Derylo‐Marczewska

et al. 2024

ChemPhysChem

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The influence of carbon pore structure on the sorption process of selected cationic dyes has been investigated. The structure and surface of carbonaceous materials have been characterized basing on various techniques: scanning electron microscopy, low temperature nitrogen adsorption–desorption measurements, X–ray photoelectron spectroscopy and thermal analysis combined with identification of gaseous products. The kinetic and equilibrium adsorption measurements of Basic Violet 3, Basic Red 1 and Basic Blue 9 from aqueous media were performed. The studied carbons seem to be promising adsorbents towards dyes, taking into account the easy–to–use uniform spherical form of the granules and a complex type of porosity with micro–, meso– and macropores appropriate for large molecule adsorption.

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Application of Synthetic Gyrolite for Adsorption

Baltakys,

Dambrauskas

2024

Synthetic Gyrolite

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Adsorption of Heavy Metals on Activated Carbons (A Review)

Cited by 16 publications

References 168 publications

Capture and Release Mechanism of Ni and La Ions via Solid/Liquid Process: Use of Polymer-Modified Clay and Activated Carbons

Capture and Release Mechanism of Ni and La Ions via Solid/Liquid Process: Use of Polymer-Modified Clay and Activated Carbons

Studies on the Process of Basic Dyes Adsorption on Uniform Spherical Carbons

Application of Synthetic Gyrolite for Adsorption

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