Potential Sorbent Research Articles

Utilization of Reformed Coconut Fiber and Banana Stem Fibre as Green Oil Sorbent

ABSTRACT Oil spillage is one of the significant wellsprings of contamination. It can happen in both land and water. Their expulsion from marine and land environment is regularly difficult. This investigation considers the utilization of coconut and banana stem fibers as a feasible sorbent material for marine and land oil spill recuperation. Coconut and banana stem fibers have lumens, which increases their specific surface area available for oil sorption. These fibers are cheap and have low bulk density, which makes them reasonable for oil spill recuperation. Moisture content in coconut and banana stem fiber were found to be 4.44% and 5.44%, respectively. The oil sorption limit of coconut and banana stem fiber was improved by coating it with chitosan. The treated fibers showed a considerable enhancement in oil sorption capacity for coconut fiber (9.87%) and banana stem fiber (6.59%), according to the results. The characterization of the natural and coated fibers was completed utilizing scanning electron microscopy and Fourier transform infrared spectroscopy. Moisture content and oil sorption limit of the fibers were estimated. The test has confirmed that both cocont and banana stem fibers can be utilized as a potential sorbent material for oil spillage tidy up.

Efficient biosorption of hexavalent chromium from water by modified arecanut leaf sheath

In this work, the excision of hexavalent chromium (Cr(VI)) was studied from an aqueous solution using the chemically modified arecanut leaf sheath (CALS) as a novel bio-adsorbent. The as-prepared adsorbent was characterized by using instrumental methods including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The effect of several factors, including solution pH, contact time, and sorbent dosages were examined to identify the optimum condition for the sorption ability. The optimal pH of Cr(VI) biosorption was 2.0, and equilibrium was reached in 150 min. Adsorption was shown to be pseudo-second-order in kinetic investigations, and the Langmuir isotherm with maximal adsorption efficiency was determined as 109.89 mg/g. The spent biosorbent can be easily regenerated and reused. For the biosorption of oxyanions of chromium, both electrostatic attraction and ligand exchange mechanism play critical roles. From the results, the CALS appears to be a potential low-cost effective sorbent to remove Cr (VI) from water.

H2S removal by copper enriched porous carbon cuboids

• Three porous structures based on carbon cuboids were synthesized. • All samples showed catalytic activity towards H 2 S besides acting as H 2 S sorbents. • H 2 S conversion increased with increasing surface area. • H 2 S breakthrough capacity increased with increasing copper content. • We observed selective oxidation of H 2 S yielding elemental sulfur. Hydrogen sulfide (H 2 S) removal by adsorption from gas streams is crucial to prevent the environmental and industrial damage it causes. Amongst the nanostructures considered excellent candidates as sorbents, porous carbon has been studied extensively over the last years. In the present work we present a synthetic procedure for three high potential sorbents based on carbon cuboids, namely a low-surface-area copper-rich structure, a highly porous aggregate without metal addition, and lastly the same porous carbon decorated with copper. The properties and performance as catalysts of these three sorbents were evaluated by powder X-ray diffraction, X-ray photoelectron spectroscopy, thermal analysis, scanning electron microscopy with energy dispersive X-ray analysis, surface area determination through N 2 adsorption and desorption, as well as by H 2 S adsorption measurements.

Understanding the competition between carbonation and sulfation of Li4SiO4-based sorbents for high-temperature CO2 capture

High-temperature CO2 adsorption is an important method in reducing the excessive CO2 emissions for the mitigation of global climate change. As a potential high-temperature CO2 sorbent, Li4SiO4 attracted extensive concern due to its high CO2 capacity with excellent stability. However, gas impurities in industrial flue gas, especially SO2 affect the CO2 adsorption process, and the competition between SO2 and CO2 during the adsorption process by Li4SiO4 is lack of understanding. This work studied the competitive behavior between carbonation and sulfation through experimental tests, characterizations, and DFT calculations. Results show that carbonation can slightly inhibit the proceeding of sulfation while sulfation almost prevents the occurrence of carbonation for both Li4SiO4 and K-Li4SiO4. In addition, the doping of K2CO3 in Li4SiO4 is observed to significantly promote both the carbonation and sulfation process. Furthermore, stable adsorption structures of CO2 and SO2 on Li4SiO4 were obtained via DFT calculation, which verifies the mutual inhibition between carbonation and sulfation. These results provide a well understanding of the competition between carbonation and sulfation of Li4SiO4-based sorbents, and are helpful for the design and optimization of CO2 adsorption process.

Exploring a novel family of poly(amide-imide)s as promising cationic sorbents for water remediation

A new monomer 5-(5-(chlorocarbonyl)-1,3-dioxoisoindolin-2-yl) isophthaloyl chloride was synthesized and subsequently condensed with a variety of diamines yielding a novel family of poly(amide-imide)s (PAIs), which were exploited as potential cationic sorbents for water treatment. The synthesized monomer and all PAIs were characterized using Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopic analyses. High thermal stability and molar masses of the whole PAIs family were determined using thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). Decomposition temperatures and char yields were found to be in the range 422-600 °C and 2–57% respectively. X-ray diffraction (XRD) patterns revealed the crystalline nature of PAIs family with few exceptions. PAI-2 was found to be the best contender with 99% optimum adsorption capacity for both Cd(II) and Pb(II) cations at optimal conditions. Adsorption capacities have been improved till 700 and 800 mg/g for Cd and Pb respectively for 100 ppm feed concentration, which depicted the efficiency of adsorbent. Adsorption data of all PAIs fitted well to Langmuir as compared to Freundlich, Temkin and Dubinin-Radushkevich adsorption models and exhibited favorable monolayer adsorption mechanism. The relative uptake of cations by PAIs followed the preferential trend Fe(II) > Pb(II) > Cd(II) > Cu(II) in a mixture of metal ions.

The Reversible Removal of SO2 by Amino Functionalized ZIF8 with 5-Aminotetrazole via Post-Synthesis Modification

The post-synthesis modification is a highly efficient method for the modification of Metal-organic framework (MOF) materials, which has been used to synthesize MOF materials purposefully that cannot be prepared by direct synthesis and impregnation method. In this work, amino modified ZIF8 with 5-aminotetrazole was prepared by the post synthesis modification method and was employed to reversibly remove SO2 from flue gas. Based on the characterization and analysis of X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and Brunner Emmet Teller (BET), it was found that the functionalized ZIF8 (Zn(5-ATZ)1.5) was a microporous material with a two-dimensional nano-layered structure. According to the SO2 adsorption experiments, the adsorption capacity of SO2 at the concentration of 1.6% vol can reach to 122 mg/g under the optimal conditions (25 °C, 2865 h−1). Five successive adsorption-desorption experiments exhibited that Zn(5-ATZ)1.5 had excellent regeneration performance. The characterization results of Raman Spectra (Raman) and X-ray photoelectron spectroscopy (XPS) as well as the DFT simulation calculations revealed that SO2 mainly interacted with Zn(5-ATZ)1.5 by hydrogen bonds between O of SO2 and amino H in the Zn(5-ATZ)1.5, and the interaction of SO2 with amino N and 5-aminotetrazole N by forming a non-covalent charge transfer complex. This work suggested that Zn(5-ATZ)1.5 is an excellent potential sorbent for SO2 removal.

Insights of microorganisms role in rice and rapeseed wastes as potential sorbents for metal removal

Rice and rapeseed agricultural wastes, as nonliving biomass, are proposed for heavy metal remediation in polluted effluents (chromium, cadmium, copper and lead). The physicochemical characterization of these biomasses shows that the surface of both sorbents is negatively charged (zeta potential), the surface area of sorbents is 4.39 and 40.7 (Brunauer–Emmett–Teller), and the main functional groups are carboxylic and hydroxyl (attenuated total reflection Fourier-transform infrared spectroscopy). The main purpose of this work is to evaluate the insights of microorganisms associated with these nonliving biomasses in the removal of heavy metals from synthetic aqueous solutions, adjusted at pH 4.0 (as the best acidic condition for the sorption process). The isolates (Bacillus genus in rice and Escherichia, Micrococcus and Staphylococcus genus in rapeseed) remove heavy metals from mentioned solutions, mainly in consortia, with contribution percentage over than 80% of total metals. In addition, when they are present in biomass, they provide an additional metal removal effect, especially in rapeseed biomass system and with multiple heavy metals aqueous solutions: i.e. Cr(III) removal, at 4 mmol/L, increases from 70 to 100%. This knowledge makes possible the use of the nonliving biomasses with no need for any special pretreatment against the microorganisms, prior to their use as metal sorbents that implies their good feasibility for application from an economical point of view.

Novel Mesoporous Organosilicas with Task Ionic Liquids: Properties and High Adsorption Performance for Pb(II).

Removal of toxic contaminants such as Pb(II) from waste solutions is environmentally requested. Therefore, in this paper, for potential novel sorbents, mesoporous ionic liquid-functionalized silicas were synthesized and tested for the removal of Pb(II) from aqueous solutions. The successful synthesis of the adsorbents was proved by nuclear magnetic resonance (29Si and 13C NMR), Fourier transform infrared spectroscopy (FTIR), and elemental analysis. The structural and textural properties were determined using scanning electron microscopy (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (TEM), and low-temperature N2 sorption, and the result showed that the applied procedure made it possible to obtain highly ordered particles with a two-dimensional mesostructure. The effects of several parameters including initial pH, contact time, adsorption temperature, and Pb(II) concentration were studied in detail and were discussed to evaluate the adsorption properties of the fabricated materials towards Pb(II). The obtained results confirmed a very high potential of the sorbents; however, the adsorption properties depend on the structure and amounts of the functional group onto fabricated materials. The sample ILS-Ox3-40 showed fast kinetics (equilibrium reached within 10 min) and capacity of 172 mg/g, and that makes it a promising sorbent for the cleanup of water contaminated by lead. It was also indicated that, regardless on structure of the tested materials, the Pb(II) removal was spontaneous and exothermic. The fabricated mesoporous silicas exhibited that they were easy to regenerate and had excellent reusability.

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater.

The presence of heavy metals in water bodies is linked to the increasing number of industries and populations. This has serious consequences for the quality of human health and the environment. In accordance with this issue, water and wastewater treatment technologies including ion exchange, chemical extraction, and hydrolysis should be conducted as a first water purification stage. However, the sequestration of these toxic substances tends to be expensive, especially for large scale treatment methods that require tedious control and have limited efficiency. Therefore, adsorption methods using adsorbents derived from biomass represent a promising alternative due to their great efficiency and abundance. Algal and seaweed biomass has appeared as a sustainable solution for environmentally friendly adsorbent production. This review further discusses recent developments in the use of algal and seaweed biomass as potential sorbent for heavy metal bioremediation. In addition, relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of adsorption process are also highlighted. Overall, the critical conclusion drawn is that algae and seaweed biomass can be used to sustainably eliminate heavy metals from wastewater.

Ca2CuO3: A high temperature CO2 sorbent with rapid regeneration kinetics

Three different calcium-based ternary oxide sorbents, Ca2CuO3, Ca3Co4O9, and Ca2Fe2O5, were characterized as potential sorbents for CO2 capture. The behaviors of these sorbents were compared to CaO under various CO2 concentrations via temperature programmed carbonation/decarbonation. Ca2CuO3 and Ca3Co4O9 showed lower inversion temperatures, while Ca2Fe2O5 had a higher inversion temperature than CaO. In addition, the copper and cobalt containing sorbents showed relatively narrower temperature windows going from the highest carbonation rate to the highest decarbonation rate. This narrow temperature window can be advantageous in operating a temperature swing process. Ca3Co4O9 and Ca2Fe2O5 showed low conversion. Under the best-case scenario, the conversion of these sorbents was less than 25%. Ca2CuO3 showed faster regeneration compared to CaO when the sorbent temperature was cycled between 700 and 800 °C. In addition, we found 740–850 °C for Ca2CuO3 and 640–900 °C for CaO as the temperature swing windows of the best reaction rates. The narrower range of operational temperature (110 °C for Ca2CuO3 compared to 260 °C for CaO) can lead to higher overall rate of CO2 uptake and release. Ca2CuO3 showed 60% higher cycle-averaged decarbonation rate compared to CaO when cycled between the temperatures of maximum carbonation and decarbonation rates

Amidoximated graphene/konjac glucomannan composite gel for uranium extraction from saline lake brine

To overcome the separation defect of amidoximated graphene oxide (rGO-PAO) in uranium sorption from water solutions, the renewable natural polymer material konjac glucomannan (KGM) is selected as the immobilization reagent, since KGM can easily form gel structure and very cheap. A rationally designed strategy is developed to synthesize the new composite gel sorbent denoted as rGO-PAO/KGM. The acquired sorbents are characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and BET specific surface area analyses. All the results prove that rGO-PAO is successfully immobilized by KGM and composite gels with three dimensional (3D) sponge-like architectures are obtained. Batch uranium sorption experiments are conducted and the effects of initial solution pH, ion strength, time, uranium concentration and coexisting ions on uranium sorption are investigated. Blank KGM is found to have low uranium sorption capacity and most of uranium ions are sorbed by rGO-PAO. The maximum experimental sorption capacities are determined to be 52.6 ± 0.5 mg/g for 20-rGO-PAO/KGM. Furthermore, the sorption mechanism of uranium by rGO-PAO/KGM are revealed by using different analytical methods. Amidoxime groups are found to play the major role in uranium sorption. Uranium extraction from natural saline lake brine sample by rGO-PAO/KGM is conducted. Although the sorption capacity is not very high, rGO-PAO/KGM can be regarded as potential sorbents for uranium extraction from natural complicated waters, considering some of their superior properties.

Hybrid Materials Formed with Green Metal-Organic Frameworks and Polystyrene as Sorbents in Dispersive Micro-Solid-Phase Extraction for Determining Personal Care Products in Micellar Cosmetics.

Hybrid materials based on polystyrene (PS) and green metal-organic frameworks (MOFs) were synthesized, characterized, and evaluated as potential sorbents in dispersive micro-solid-phase extraction (µ-dSPE). Among the resulting materials, the hybrid PS/DUT-67(Zr) was selected as the adequate extraction material for the monitoring of six personal care products in micellar cosmetic samples, combining the µ-dSPE method with ultra-high performance liquid chromatography (UHPLC) coupled to ultraviolet/visible detection (UV/Vis). Univariate studies and a factorial design were performed in the optimization of the microextraction procedure. The compromise optimum extraction conditions included 20 mg of PS/DUT-67(Zr) for 10 mL of sample, 2 min of extraction time, and two desorption steps using 100 µL of acetonitrile and 5 min assisted by vortex in each one. The validated μ-dSPE-UHPLC-UV/Vis method presented limits of detection and quantification down to 3.00 and 10.0 μg·L−1, respectively. The inter-day precision values were lower than 23.5 and 21.2% for concentration levels of 75 μg·L−1 and 650 μg·L−1, respectively. The hydrophobicity of the resulting PS/DUT-67(Zr) material was crucial for the improvement of its extraction capacity in comparison with its unitary components, showing the advantages of combining MOFs with other materials, getting new sorbents with interesting properties.

Sorption of Acridine Orange on Non-Swelling and Swelling Clay Minerals

Acridine orange (AO) is a cationic fluorescent dye commonly used in DNA analyses. Extensive studies were conducted for its metachromasy under different solution concentrations and different amounts of AO sorbed on a solid surface. Meanwhile, for the safe disposal of wastewater, AO removal from water using different materials was also evaluated extensively. Clay minerals, due to their large specific surface area, high cation exchange capacity, and vast reserves, have been evaluated as potential sorbents for the removal of a variety of different types of contaminants, including color dyes. In this study, the sorption of AO on different types of clay minerals was contrasted. The sorption of co-presenting Zn2+ was much less than the sorption of AO, suggesting that clay minerals have higher affinities for AO in comparison to inorganic Zn2+. The desorption of exchangeable cations was linearly related to AO sorption, and the amounts of AO sorbed were close to the CEC values of the minerals, confirming that cation exchange is the dominating mechanism for AO sorption. Molecular dynamics simulation results showed that, under low and high AO loading levels, the sorbed AO formed monolayers and bilayers on the mineral surfaces of non-swelling clay minerals, except halloysite, as well as in the interlayer of swelling clay minerals, due to its relatively large dimer constant in solution. Overall, clay minerals are good candidates for the removal of cationic dyes from solution even in the presence of competing inorganic cations.

Removal of heavy metals from contaminated water using industrial wastes containing calcium and magnesium

Two industrial wastes (IW1 and IW2) were investigated as potential sorbents to retain cadmium and lead from contaminated water. The sorption experiments have been conducted through lab-engineered cartridge filtration system in order to get as close as possible to industrial processes. The effectiveness of IW1 and IW2 were compared to that of activated charcoal Norit® (AC), the best-known matrix for its excellent retention capacity. The sorption isotherms of metals on the three solid sorbents (IW1, IW2 and AC) were built, and then mathematically modelled. Free Gibbs energy (ΔG°) of the sorption processes as well as the equilibrium parameter (RL) have been calculated for each pollutant-sorbent couple. The study revealed that: i) for cadmium sorption, IW2 was much more effective than IW1 and especially than AC (18-fold higher in term of maximal sorption capacity); ii) if IW2 was slightly less effective than AC to retain lead, it can be still considered as an interesting sorbent due to its low cost; iii) the sorption of cadmium was as spontaneous on AC as on IW1, and almost half as much on IW2; iv) regarding lead retention, the sorption on the three sorbents was spontaneous; (v) the retention of cadmium and lead was mainly explained by precipitation since otavite, cerussite and hydrocerussite were identified and characterized by X-ray diffraction of used sorbents. The study showed that the industrial wastes studied stood out as new efficient materials with sorption power equal to or greater than the reference material AC. The prospect of a new generation of industrial wastes with lasting efficiency as contaminated water depollution agents comes at a key moment in the search for new perspectives in the circular economy.

Removal of Methylene Blue from Aqueous Solution Using Black Tea Wastes: Used as Efficient Adsorbent

The biosorbent black tea wastes (BTW) after preliminary treatments was used in this study for the removal of methylene blue (M.B) from aqueous solution. The removal of M.B from aqueous solution was studied as a function of time, initial concentration of M.B temperature, pH, and BTW dosage. The optimum time for equilibration was achieved in 3 min. The optimum dosage of adsorbent was found to be 0.4 g. Various kinetic models were applied to the sorption kinetic data in which the obtained data was best explained by the pseudo-second-order model ([Formula: see text]) with a rate constant K2 of 0.0714–0.0763 g.mg-1 min-1. Additionally, the calculated amount of adsorption was approximately equal to the experimentally determined value. The isotherm data was best fitted to the Langmuir model rather than the Freundlich model. The intraparticle diffusion model exhibited the process to be diffusion dependent. The various organic functional groups on the surface of BTW played a significant role in the sorption of the selected dye. Consequently, BTW has the prospective to act as a potential sorbent for the removal of other contaminants from aquatic media as well.

Application of NaOH modified rice husk as a potential sorbent for removal of Congo red from an aqueous solution

Application of NaOH modified rice husk as a potential sorbent for removal of Congo red from an aqueous solution

Superhydrophobic/superoleophilic micro/nanostructure nickel particles for oil/water mixture and emulsion separation

Nowadays, developing reusable and highly efficient materials for separating nano/micro-sized oil droplets from oil/water mixture and emulsion remains very challenging. Herein, hedgehog-like micro/nanostructure nickel particles were fabricated via a hydrothermal route. Thanks to its unique morphology, the octadecyltrichlorosilane (ODTS)-modified nickel particles show suitable superhydrophobicity/superoleophilicity properties with water contact angle, oil contact angle, and contact angle hysteresis values of 169.17° ± 2.13°, 0°, and 2.32°± 0.34°, respectively, making the potential sorbent for oil/water separation. The dense narrow thorns of superhydrophobic/superoleophilic nickel particles help the maximum scattering of particles on the surface and in the solutions. Hence, superhydrophobic/superoleophilic nickel particles demonstrated outstanding sorption capacity ranging from 3.86 to 5.27 (g/g) for a wide range of organic solvents and oils. Also, sorption capacities were retained even after 10 sorption cycles. Additionally, sorption capacities remain steady under acidic, alkaline, and high-saline conditions, indicating the high resistance in the harsh media. More importantly, ODTS-modified particles could also be used in oil/water emulsion separation with efficiencies of higher 99%. The appropriate resistance of hedgehog-like micro/nanostructure nickel particles to various environmental conditions as well as reusability and recyclability provides good opportunities for industrial applications of oil uptake from the oil/water mixture and emulsion.

STUDY OF SORPTION PROPERTIES OF WASTE PROCESSING FRUITS AND LEAVES OF ALDER SPECIES ALNUS INCANA(L.) MOENCH A. GLUTINOSA (L.) GAERTH

Abstract: The growing need for enterosorbents dictates the need to search for new economically profitable raw materials for obtaining medicines of this group. The attention of researchers is increasingly attracted by plant waste from the pharmaceutical and food industries, the use of which will not only expand the range of modern enterorbents, but also solve the problem of reducing the cost of phytopreparations. The aim of the study was to study the adsorption capacity of waste from the processing of coplodia and alder leaves of pharmacopoeia species in relation to standard markers in in vitro tests. The object used was a cake of gray and black alder leaves, as well as a cake of alder coplodia (a mixture of two types), sold according to the FS Fructus Alni, obtained by extraction of raw materials with 70% ethyl alcohol, dried in a drying cabinet at 105 ° C with subsequent grinding. Crushed cakes were fractionated using a set of sieves, fractions with a particle size of no more than 0.5 mm were selected for research. The crushed samples themselves, as well as samples that underwent additional processing, were used as potential sorbents. Standard technologies aimed at increasing porosity were used. In the course of the study, the adsorption capacity of the obtained cakes of raw materials was evaluated by methylene blue and gelatin in comparison with similar indicators of traditional enterosorbents - the preparation "Polyphepan" and microcrystalline cellulose. The comparability of the data obtained allows us to consider the studied raw materials as a promising source of obtaining enterosorbents using waste-free technology.

Enhanced removal of Cr(VI) and Mo(VI) from polluted water using L-cysteine doped polypyrrole/bentonite composite

The demand for clean water and soil drives high efficiency, less expensive, and eco-friendly clay-composites as adsorbents for remediation of heavy metals polluted environment. We have developed a new water remediation technique by using an organic-inorganic composite, L-cysteine doped polypyrrole modified bentonite (L-cys/PPy/BT) for removal of Cr(VI) and Mo(VI). The L-cys/PPy/BT showed maximum adsorption capacities of 318.5 and 65.4 mg/g for Cr(VI) and Mo(VI) respectively. For Cr(VI) and Mo(VI) the sorption process on L-cys/PPy/BT followed the Freundlich and Langmuir isotherm models, respectively. Furthermore, the pseudo-second-order kinetic model described the adsorption behavior of Cr(VI) and Mo(VI). Moreover, the thermodynamic parameters indicated that sorption processes were endothermic and spontaneous. Mechanistic assessment revealed that adsorption of Mo(VI) on L-cys/PPy/BT could be attributed to chelation, electrostatic attraction and ion-exchange of Mo(VI) with the imine/amine functional groups in the material's matrix, while electrostatic attraction, ion exchange, chelation and redox reaction played a significant role in the removal of Cr(VI). This research provides a new approach for the use of clay materials as potential sorbents for removal of heavy metal ions in contaminated water.

Investigation into the influencing factors and adsorption characteristics in the effective capture of carbon dioxide in flue gas by chitosan grafted Leca biocomposite

ABSTRACT The main goal of this research was to evaluate the capability of chitosan (CS)-lightweight expanded clay aggregate (Leca) composite as a green adsorbent for efficient capture of carbon dioxide (CO2). The adsorption process was modelled by response surface methodology (RSM). The composite was recognised by BET, SEM, EDX, XRF, XRD, TGA, XPS and FTIR analysis. It was evidenced the CS-Leca properties attributing to its adsorption ability were eminently improved as compared to pristine Leca. Maximum removal efficiency of CO2 (91.59%) was achieved at 40°C, 40 mL/min gas flow rate and 5% moisture content. Under aforementioned provisions, the actual CO2 removal percentage was found to be 90.4%. According to uptake isotherm studies, the Toth model indicated good affinity between the sorbent and sorbate. This model declares adsorption of CO2 onto CS-Leca involves a heterogeneous and uneven adsorption behaviour. The monolayer adsorption capacity (qm) was determined to be 351.24 mg/g. The outcomes of thermodynamic studies displayed that the adsorption was physical and exothermic in nature. The exothermic isosteric heat of adsorption (IHA) was found as 37.1–48.3 kJ/mol which represented weak chemical interactions between CS-Leca and CO2 molecules. Adsorption mechanism studies revealed that multiple mechanisms are involved in the adsorption reaction of CO2. Regeneration tests of CS-Leca exhibited multiple potential applications. All these results enlightened that the CS-Leca, due to its grafting polymer, can be applied as a potential sorbent to the recycle of CO2 and other acidic gases.