Physicochemical, structural, and adsorption properties of chemically and thermally modified activated carbons

Bosacka, Alicja; Zienkiewicz-Strzałka, Małgorzata; Deryło–Marczewska, Anna; Chrzanowska, Agnieszka; Wasilewska, Małgorzata; Sternik, Dariusz

doi:10.1016/j.colsurfa.2022.129130

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…The recorded maximum adsorption values were within the ranges of 0.257–0.381 and 0.521–0.873 mmol/g, respectively, for IBP and D ( Figure 4 c). This dependence can be correlated based on the differences in the water solubility of these substances [ 1 , 19 , 43 , 58 ]. In the case of the tested non-steroidal anti-inflammatory drugs, ibuprofen is more soluble in water than diclofenac.…”

Section: Resultsmentioning

confidence: 99%

“…This dependence can bring closer a series of the first order processes or the follow up processes. It can be formulated as:

where “i”—the term of m-exp equation, k i —the rate coefficient, u eq = 1 − c eq /c 0 —the relative loss of adsorbate from the solution [ 1 , 19 , 42 , 48 ].…”

Section: Methodsmentioning

confidence: 99%

“…Undoubtedly, the disadvantage of pure alginate salts is their poorly developed structure [ 15 ], which translates into a low sorption capacity in relation to organic pollutants. It should be noted that the use of activated carbon in water treatment processes has been widely spread for many years [ 1 , 14 , 16 , 17 , 18 , 19 ]. Concurrently, the use of this material, especially when it is in a dusty form, has some technical drawbacks, for example, difficulty in recovery.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Non-Steroidal Anti-Inflammatory Drugs on Alginate-Carbon Composites—Equilibrium and Kinetics

Wasilewska

Deryło–Marczewska

2022

Materials

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In this work, alginate–carbon composites with different active carbon content were synthesized and studied by various techniques. The obtained materials can be used as adsorbents in the processes of removing organic pollutants from water. In this study, the effect of the immobilization of activated carbon in calcium alginate was investigated. Textural properties were determined by measuring low-temperature nitrogen adsorption/desorption isotherms. The largest specific surface area was recorded for ALG_C8 and amounted to 995 m2/g. The morphology of alginate materials was determined on the basis of scanning electron microscopy. The adsorption properties were estimated based on the measurements of equilibrium and adsorption kinetics. The highest sorption capacities were 0.381 and 0.873 mmol/g for ibuprofen and diclofenac, respectively. The generalized Langmuir isotherm was used to analyze the equilibrium data. A number of equations and kinetic models were used to describe the adsorption rate data, including first (FOE) and second (SOE) order kinetic equations, 1,2-mixed-order kinetic equation (MOE), fractal-like MOE equation (f-MOE), multi-exponential equation (m-exp), in addition to diffusion models: intraparticle diffusion model (IDM) and pore diffusion model (PDM). Thermal stability was determined on the basis of data from thermal analysis in an atmosphere of synthetic air.

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Section: Resultsmentioning

confidence: 99%

“…This dependence can bring closer a series of the first order processes or the follow up processes. It can be formulated as:

where “i”—the term of m-exp equation, k i —the rate coefficient, u eq = 1 − c eq /c 0 —the relative loss of adsorbate from the solution [ 1 , 19 , 42 , 48 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Non-Steroidal Anti-Inflammatory Drugs on Alginate-Carbon Composites—Equilibrium and Kinetics

Wasilewska

Deryło–Marczewska

2022

Materials

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“…Moreover, the possibility to employ suitable materials from natural sources makes solid/liquid adsorption a green answer to the problem of REEs recovery. Clay-based materials [ 13 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ] and carbon-based materials [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ], either in a pristine form or appropriately modified, are typical exponents of the category of natural sorbents, and have been broadly discussed in literature.…”

Section: Introductionmentioning

confidence: 99%

“…The authors’ research group dealt with the investigation of innovative sorbents such as mineral clays [ 17 , 37 ], organoclays [ 37 , 38 ] and activated carbon [ 20 , 39 ] in multiple works. Activated carbon (AC) is widely used for the adsorption of metallic elements from aqueous solutions due to its inherent porosity, high specific surface area, peculiar surface chemistry, and cheapness [ 31 , 35 , 40 ]. Its modification with pentaethylenehexamine (PEHA) proved to be appropriate to increase the AC capability to adsorb metal cations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Adsorption-Release Isotherms of Pentaethylenehexamine-Modified Sorbents for Rare Earth Elements (Y, Nd, La)

et al. 2022

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Waste from electrical and electronic equipment (WEEE) is constantly increasing in quantity and becoming more and more heterogeneous as technology is rapidly advancing. The negative impacts it has on human and environment safety, and its richness in valuable rare earth elements (REEs), are accelerating the necessity of innovative methods for recycling and recovery processes. The aim of this work is to comprehend the adsorption and release mechanisms of two different solid sorbents, activated carbon (AC) and its pentaethylenehexamine (PEHA)-modified derivative (MAC), which were deemed adequate for the treatment of REEs deriving from WEEE. Experimental data from adsorption and release tests, performed on synthetic mono-ionic solutions of yttrium, neodymium, and lanthanum, were modelled via linear regression to understand the better prediction between the Langmuir and the Freundlich isotherms for each REE-sorbent couple. The parameters extrapolated from the mathematical modelling were useful to gain an a priori knowledge of the REEs–sorbents interactions. Intraparticle diffusion was the main adsorption mechanism for AC. PEHA contributed to adsorption by means of coordination on amino groups. Release was based on protons fostering both a cation exchange mechanism and protonation. The investigated materials confirmed their potential suitability to be employed in real processes on WEEE at the industrial level.

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Adsorption of organic dyes in mesoporous carbon sorbent modified with salicylic acid

et al. 2023

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Physicochemical, structural, and adsorption properties of chemically and thermally modified activated carbons

Cited by 10 publications

References 35 publications

Adsorption of Non-Steroidal Anti-Inflammatory Drugs on Alginate-Carbon Composites—Equilibrium and Kinetics

Adsorption of Non-Steroidal Anti-Inflammatory Drugs on Alginate-Carbon Composites—Equilibrium and Kinetics

Analysis of the Adsorption-Release Isotherms of Pentaethylenehexamine-Modified Sorbents for Rare Earth Elements (Y, Nd, La)

Adsorption of organic dyes in mesoporous carbon sorbent modified with salicylic acid

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