Spherical Adsorbent Research Articles

Synthesis and performance estimation of a granulated PVC/PAN-lithium ion-sieve for Li+ recovery from brine

In order to effectively solve the problem of adsorbent powder forming and further promote its industrial application, granulated lithium ion-sieve powder with spherical shape by polyvinyl chloride (PVC) with high mechanical stability of and hydrophilicity of polyacrylonitrile (PAN) with good hydrophilicity was initially prepared in our study by a phase transformation method. Based on the various characterization results, spherical particles materials formation mechanisms were summarized below. Langmuir, D-R, pseudo-second-order kinetics and diffusion kinetic indicated that the adsorption process of Li+ was a multi-step controlled monolayer chemisorption process. In addition, after 50 cycles of dynamic column operation, the adsorption capacity remained around 11.90 mg g−1, and the manganese dissolution loss rate was only 0.15%, which is much lower than that as reported. Therefore, the spherical adsorbent could be used for efficiently recovery Li+ from Salt Lake brine as well as its excellent potential for further application.

Electrochemical behaviors of porous spherical spinel H1.6Mn1.6O4 with high Li+ adsorption capacity

A self-assembled spherical H1.6Mn1.6O4 adsorbent with surface porous and internal hollow structure was successfully synthesized. Due to the special surface porous and internal hollow structure, the adsorbent exposes channels and interfaces for ions migration and ad/desorption, and also provides sites for charge transfer. At an initial Li+ concentration of 400 mg/L, the spherical adsorbent adsorption capacity of lithium can efficiently reach an extreme 47.54 mg/g in 360 min (the traditional adsorption route is 44.36 mg/g at 2880 min) without alkaline assistance by applying the electrochemical adsorption technique. In the multiple MCl (M = Li, Na, K, Rb, Cs) solution with each metal ion molar concentration of 14.41 mmol/L, the adsorbent adsorption capacity keeps 89.71% of a single LiCl solution. After the 5th cycle, the adsorption capacity to lithium remains at 94.98% (the traditional adsorption route is 86.65%) of the initial adsorption value. According to the analysis of cyclic voltammetry (CV) curves, it is found that the key kinetic factor limiting the adsorption rate is that the ions migration rate cannot catch up with the electrons transfer rate during the adsorption process. Furthermore, the electric field self-promotes the pH of the solution, and the corresponding alkaline environment is favorable for the adsorption behaviors. In the actual salt lakes brine, the 1st electrochemical adsorption capacity of the adsorbent for lithium is 3.26 mmol/g (Salt lake B), and the 5th adsorption capacity is 83.74% of the 1st adsorption value.

Separatable MoS2 loaded biochar/CaCO3/Alginate gel beads for selective and efficient removal of Pb(II) from aqueous solution

Centimeter-scale composite biochar-alginate gel beads (MoS2B/CaCO3/Alg) were designed for the adsorption of Pb(II) in water using MoS2 modified biochar as the filler, alginate as the matrix, and CaCO3 as the active additive component. The composite gel beads were characterized using scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), X-ray diffraction (XRD), and other techniques. MoS2B/CaCO3/Alg showed excellent adsorption capacity over a wide range of pH 4–7. The maximum adsorption capacities obtained using the Langmuir model were 769.2, 833.3, and 909.1 mg g−1 at 10, 25 and 40 °C, respectively. At a dosing rate of 0.4 g L−1, MoS2B/CaCO3/Alg was able to reduce the Pb(II) concentration to below 0.05 ppm in complex simulated lead battery wastewater. After 10 repeated cycles, MoS2B/CaCO3/Alg maintained a high removal rate of 98.4 %. This spherical adsorbent is simple to prepare and easy to recover, has an ultra-high adsorption capacity, and is mechanically stable and resistant to interference, thus it is expected to be suitable for application in industrial wastewater treatment.

Synthesis of cellulose II-based spherical nanoparticle microcluster adsorbent for removal of toxic hexavalent chromium

Since natural cellulose is mostly cellulose I and has a fibrous form, most cellulose-based adsorbents are fibrous/rod-shaped and exhibit the cellulose I crystal structure. This study reports a cellulose II-based spherical nanoparticle microcluster adsorbent (SNMA), synthesized from biomass by a bottom-up approach, for removing toxic hexavalent chromium (Cr(VI)). The basic structure of SNMA was investigated. Notably, the prepared adsorbent was a microcluster composed of spherical nanoparticles, while exhibiting cellulose II crystal structure, resulting in higher thermal stability and significantly enhanced adsorption performance. The adsorption process and mechanism of SNMA on Cr(VI) were studied in detail. The SNMA achieved a high adsorption capacity (225.94 mg/g) and receptor site density. The SNMA is expected to be used as a bio-based spherical nanoparticle microcluster adsorbent platform for the adsorption of different toxic substances by changing the surface functional groups of its components, spherical nanoparticles.

Vascular Endothelial Dysfunction in the Thoracic Aorta of Rats with Ischemic Acute Kidney Injury: Contribution of Indoxyl Sulfate

Chronic kidney disease (CKD) and cardiovascular disease are known to be linked, and the involvement of indoxyl sulfate (IS), a type of uremic toxin, has been suggested as one of the causes. It is known that IS induces vascular dysfunction through overproduction of reactive oxygen species (ROS). On the other hand, the involvement of IS in the vascular dysfunction associated with acute kidney injury (AKI) is not fully understood. Therefore, we investigated this issue using the thoracic aorta of rats with ischemic AKI. Ischemic AKI was induced by occlusion of the left renal artery and vein for 45 min, followed by reperfusion 2 weeks after contralateral nephrectomy. One day after reperfusion, there was marked deterioration in renal function evidenced by an increase in plasma creatinine. Furthermore, blood IS levels increased markedly due to worsening renal function. Seven days and 28 days after reperfusion, blood IS levels decreased with the improvement in renal function. Of note, acetylcholine-induced vasorelaxation deteriorated over time after reperfusion, contradicting the recovery of renal function. In addition, 28 days after reperfusion, we observed a significant increase in ROS production in the vascular tissue. Next, we administered AST-120, a spherical adsorbent charcoal, after reperfusion to assess whether the vascular endothelial dysfunction associated with the ischemic AKI was due to a temporary increase in blood IS levels. AST-120 reduced the temporary increase in blood IS levels after reperfusion without influencing renal function, but did not restore the impaired vascular reactivity. Thus, in ischemic AKI, we confirmed that the vascular endothelial function of the thoracic aorta is impaired even after the recovery of kidney injury, probably with excessive ROS production. IS, which increases from ischemia to early after reperfusion, may not be a major contributor to the vascular dysfunction associated with ischemic AKI.

Comparative study of Pb2+, Ni2+, and methylene blue adsorption on spherical waste solid-based geopolymer adsorbents enhanced with carbon nanotubes

• Carbon nanotube/geopolymer spheres were obtained by spheroidization. • Pore structure and phase evolution of the spheres were affected by carbon nanotubes. • Adsorption performance was enhanced by carbon nanotubes. Spherical porous carbon nanotube-reinforced geopolymer (CNTs/GP) adsorbents were spheroidized in polyethylene glycol 400 solvent by combing carbon nanotubes (CNTs) with a fly ash and slag-based geopolymer slurry. The effects of CNTs on the phase evolution and pore structure of the CNTs/GP spheres and their adsorption behavior for methylene blue (MB) and heavy metals (Pb 2+ and Ni 2+ ) were evaluated. The CNTs/GP spheres had a perfect spherical shape and mesoporous structure. The spheres were composed of an amorphous phase and had a high BET surface area of 73.06 m 2 /g with 3 wt% CNTs. The addition of CNTs into the spheres enhanced the removal efficiency for the pollutants (Pb 2+ , Ni 2+ and MB). The calculated q m of the sphere with 3 wt% CNTs was 25.549 mg/g for MB, 52.743 mg/g for Pb 2+ ; and 8.915 mg/g for Ni 2+ . The adsorption data of the spheres were well obeyed the Langmuir isotherm model and pseudo-second-order kinetics model, suggesting that multiple mechanisms such as physisorption, chemisorption and ion exchange were involved. The CNTs/GP spheres also presented good cyclic regeneration properties; hence, they can be applied as potential adsorbents for the treatment of hazardous wastewater.

Fabrication and characterization of a toughened spherical chitosan adsorbent only through physical crosslinking based on mechanism of Chain Rearrangement.

Chitosan extracted from natural products has gained tremendous attention in the field of adsorption and separation due to its inherent biocompatibility and potential applications. In this research, we synthesized a new type of spherical chitosan adsorbent (SCA) by controlling the mass transfer rate of the entanglement of the polymer chains in the recombination process. This SCA is a highly crystalline polymer material with outstanding mechanical strength, high adsorption capacity, a porous surface and suitable particle size distribution. The value of the sphericity of attrition of this SCA was 89.8%, which is the same as that of the commercial macroporous resin with a polystyrene matrix. The X-ray diffraction (XRD) patterns and differential scanning calorimetry (DSC) curves showed a significant change from powder to spherical structure and confirmed that the SCA is highly ordered and crystalline. Optical microscopy (OM) and scanning electron microscopy (SEM) demonstrated that the SCA was composed of a tightly stacked fiber structure, indicating the homogeneity of the polymerization. The porous structure of the surface provided a channel for mass transfer, which was indicated by a test of the ion exchange capacity and the adsorption performance of the SCA with Cu(ii) as the adsorbed subject. The adsorption capacity was higher than those of all reported non-composite chitosan materials. Therefore, we have successfully synthesized a completely green, nontoxic and environmentally friendly adsorbing resin equipped with excellent mechanical properties and adsorption capacity for future applications in many new fields.

Preparation of a composite material based on self-assembly of biomass carbon dots and sodium alginate hydrogel and its green, efficient and visual adsorption performance for Pb2+

In this paper, an environmentally friendly, visible and easy-to-recycle spherical adsorbent (SA@PEI-CDs, SA: sodium alginate, PEI: polyethyleneimine, CDs: carbon dots) has been prepared from functionalized positively charged biomass carbons dots (PEI-CDs) and anionic polyelectrolyte sodium alginate (SA) through electrostatic self-assembly. SA@PEI-CDs can efficiently and preferentially adsorb Pb2+. Compared to bare SA, the adsorption capacity of SA@PEI-CDs increased from 206.93 mg/g to 380.39 mg/g (at pH=4), which enhanced 83.82%. It can still maintain 85.67% of the original adsorption capacity after five cycles. The quenching of the blue fluorescence of the adsorbent derived from carbon dots indicates that the adsorption process has reached saturation. The investigation about the adsorption isotherm models, kinetics and thermodynamic parameters reveals that the adsorption process follows Freundlich isotherm model based on chemical adsorption, which is an endothermic spontaneous reaction with an increase in entropy. The possible adsorption mechanism is electrostatic attraction, ion exchange, and together with the coordination of -NH2, -OH, -COOH with Pb2+. In addition, the extremely easy-to-recycle spherical adsorbent is also used in the multi-layer adsorption and separation of simulated sewage samples in the water purifier model. For simulated water samples whose concentration of five/three types of heavy metal ions exceeds 100 times the standard, after using adsorbent SA@PEI-CDs for two or three consecutive adsorptions, the content of heavy metals decreases rapidly, which is far below the limit value of high-quality water. The Pb2+ ion concentration decreased from 1.0 mg/L to 0.002540 mg/L and 0.003611 mg/L, respectively.

Synthesis of spherical SBA-15 by poly (vinyl alcohol)/ Hydroxyl-terminated polybutadiene supermicelles as co-surfactant and its application for removal of diazinon from aqueous solution

A low-cost and facile strategy was successfully developed to produce spherical micrometer-sized SBA-15 with cylindrical pores arranged in a hexagonal order using pluronic triblock-copolymer P123 as template and poly (vinyl alcohol) (PVA)/hydroxyl-terminated polybutadiene (HTPB) supermicelles as co-surfactant. Herein, a solvent evaporation induced aggregating assembly (EIAA) method was reported for the preparation of SBA-15 microspheres. The materials were characterized by Scanning electron microscopy (SEM), High resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Brunauer–Emmet–Teller (BET) method. The diazinon adsorption properties of spherical SBA-15 were studied to find out the effect of various experimental factors. Results exhibited that the highest diazinon removal efficiency (95.2%) was achieved at pH 6, initial concentration of 50 mg L −1 , temperature of 318 K, and the adsorbent dosage of 0.1 g L −1 for 60 min. The adsorption behavior of diazinon was described by the Langmuir isotherm and pseudo-second-order model (R 2 > 0.99). Maximum adsorption capacity obtained 526.3 mg g −1 . The apparent activation energy for spherical SBA-15 was 16.69 kJ mol −1 . Thermodynamic studies illustrated that the adsorption process was exothermic with spontaneous nature. The efficiency of diazinon removal was not considerably affected by the presence of the lindane. Moreover, the spherical SBA-15 retained its adsorbing properties after sixteen cycles. • Spheres obtained using P123–PVA/HTPB as a template in the THF/H 2 O/ethanol mixture. • Spherical SBA-15 adsorbent was highly effective to diazinon removal. • The adsorption process was described by the Langmuir isotherm. • The pseudo-second-order model is the best to adsorption kinetic.

Designing large-sized and spherical CO2 adsorbents for highly reversible CO2 capture and low pressure drop

To enhance the processing efficiency of CO2 capture from flue gas of post-combustion emission using fixed-bed adsorption system, the regenerable adsorbents and low pressure drop should be required. The uniform-sized Polyacrylonitrile (PAN) nanoparticles were synthesized, followed by the surface-modification with alkylamine (APAN) and sec-butanol (APAN-OH) as a strategy for achieving the stabilization of the amine group in the repeated CO2 adsorption/desorption cycles. The synthesized APAN-OH nanoparticles were interconnected one another by Ca-Alg nanofiber as a linker and formed the millimeter-sized sphere with hierarchical pores. At 25 °C and 1 bar, CO2 adsorption capacity of a Hierarchically porous spherical adsorbent (HPSA) reached to ~2.07 mmol CO2/g HPSA and physicochemical stability of HPSA was achieved even in 50 cycles of CO2 adsorption/desorption. Also, the selectivity for CO2 capture was calculated as about 71 by the IAST model at CO2/N2 molar ratio of 15:85. Extremely low pressure drop values were recorded in the fixed-bed adsorption system packed with HPSAs, compared with those of APAN-OH nanoparticles. The superior regenerable and large-sized adsorbent with the interior structure resulting in low pressure drop is expected to take the CO2 capture technology a step further.

Polyethyleneimine-grafted polyphosphazene microspheres for rapid and efficient capture of anionic dyes from wastewater

Developing novel adsorbent to capture organic contaminants from wastewater rapidly and efficiently is highly desirable for waste treatment and environmental restoration. Herein, we reported a new amino-rich spherical adsorbent (PZS-PEI) for highly-efficient uptake of anionic dyes from aqueous solution. The PZS-PEI adsorbent was fabricated through a two-step process including synthesis of PZS-Cl microspheres via room temperature polymerization of hexachlorocyclotriphosphazene with bis(4-hydroxyphenyl) sulfone and subsequent surface grafting reaction of PZS-Cl microspheres using branched polyethyleneimine (PEI). The microstructure of as-obtained PZS-PEI microspheres was fully characterized by scanning electron microscopy, Fourier transform infrared, X-ray photoelectron spectroscopy, zeta potential, and N2 adsorption test. The adsorption performance of the PZS-PEI microspheres towards organic dyes was evaluated through carrying out a series of studies including various influence factor analysis, adsorption isotherm, kinetics, and thermodynamics. Results show that the PZS-PEI adsorbent owned good adsorption selectivity towards anionic dyes, and the maximum adsorption capacities for methyl orange (MO), acid chrome blue K, eosin-Y reached 190.29, 152.90, and 92.34 mg/g at 25 °C, respectively. In addition, the uptake behavior of organic dye by the PZS-PEI adsorbent conformed to Freundlich isotherm and pseudo-second order kinetic model, and the adsorption process followed a three-stage intraparticle diffusion mode with an endothermic and spontaneous characteristic. Electrostatic interaction and hydrogen bonding were responsible for the highly-efficient adsorption of the PZS-PEI adsorbent towards typical anionic dye MO.

Novel eco-friendly spherical porous adsorbent fabricated from Pickering middle internal phase emulsions for removal of Pb(II) and Cd (II)

Spherical porous materials prepared from the emulsion template used in the water treatment have displayed a vast prospect, as the high surface area, abundant porous structure, convenient operation and excellent adsorption performance. But the tedious fabrication process, high consumption of organic solvent and surfactant limited the application widely. Herein, a facile and eco-friendly spherical porous adsorbent (SPA) is fabricated from the green surfactant-free (corn oil)-in-water Pickering medium internal phase emulsions (Pickering MIPEs) via the convenient ion crosslinking procedure. The Pickering MIPEs synergistically stabilized with the semi-coke (SC), which is the natural particle produced from the shale oil distillation, and sodium alginate (SA) has excellent storage and anti-coalescence stability. The as-prepared porous adsorbent possessed the abundant pore structure, which provided favorable conditions for effective mass transfer in adsorption, and could be tuned by varying the SA dosage. The saturation adsorption capacities of Pb(II) and Cd(II) can be achieved with 460.54 and 278.77 mg/g within 45 min at 25°C, respectively. Overall, this study supplied a viable and eco-friendly route for fabricating the spherical porous adsorbent with a tunable porous structure for heavy metal ion wastewater.

Study of tentacle-like cationic macroporous cellulose spherical adsorbent for heavy metals

The rational structure and functional ligands design are of great significance to prepare high-performance adsorbents in the application. Herein, macroporous cellulose beads derived from pine needles with tentacle-like functionalized ligands are developed for heavy metal ions adsorption. The macroporous structure is generated via templated assistance, which endows the beads with high permeability, and the kinetic experiments reveal the fast adsorption rate within 40 min. The glycidyl methacrylate (GMA) serve as monomers to fabricate tentacle-like polymer chains on the beads and then m0odified with iminodiacetic acid (IDA). The grafted polymers increase the ligand density of IDA, which provides more binding sites for heavy metal ions. As a result, the adsorption experiments indicate that the prepared adsorbent shows a high adsorption capacity of 300.12, 240.62, 216.41 mg/g for copper (II), manganese (II), and nickel (II), respectively, which confirm the high performance of the adsorbents. On the basis of these results, this work not only provides a promising candidate for the heavy metal ions treatment, but also expands an approach of high-value utilization of biomass.

Adsorption of an Ideal Gas on a Small Spherical Adsorbent.

The ideal gas model is an important and useful model in classical thermodynamics. This remains so for small systems. Molecules in a gas can be adsorbed on the surface of a sphere. Both the free gas molecules and the adsorbed molecules may be modeled as ideal for low densities. The adsorption energy, , plays an important role in the analysis. For small adsorbents this energy depends on the curvature of the adsorbent. We model the adsorbent as a sphere with surface area , where R is the radius of the sphere. We calculate the partition function for a grand canonical ensemble of two-dimensional adsorbed phases. When connected with the nanothermodynamic framework this gives us the relevant thermodynamic variables for the adsorbed phase controlled by the temperature T, surface area , and chemical potential . The dependence of intensive variables on size may then be systematically investigated starting from the simplest model, namely the ideal adsorbed phase. This dependence is a characteristic feature of small systems which is naturally expressed by the subdivision potential of nanothermodynamics. For surface problems, the nanothermodynamic approach is different, but equivalent to Gibbs’ surface thermodynamics. It is however a general approach to the thermodynamics of small systems, and may therefore be applied to systems that do not have well defined surfaces. It is therefore desirable and useful to improve our basic understanding of nanothermodynamics.

Highly efficient and sustainable alginate/carboxylated lignin hybrid beads as adsorbent for cationic dye removal

In this study, chemically modified lignin and alginate (Alg) hybrid spherical adsorbents exhibiting highly effective adsorption performance for cationic dyes were simply prepared. Carboxylated lignin (C-Lig) was prepared by simple peracetic acid oxidation. Thereafter, through encapsulation of C-Lig into Alg beads was conducted. As the encapsulated amount of C-Lig increased, a higher methylene blue (MB) removal capacity was observed due to the introduction of carboxylated anions on the surface. The adsorption isotherm of Alg/C-Lig beads followed the Langmuir model and exhibited a high monolayer maximum adsorption capacity (qm) of 613 mg/g due to the driving force which is electrostatic interaction between the cationic dye and the anionic group of C-Lig. According to intraparticle diffusion theory, the adsorption behavior proceeded in surface adsorption and internal diffusion during 6 h of the adsorption process. Desorption of MB molecules was found to occur easily via a change in only the pH condition of the solution, and it was possible to maintain over 80% of stable adsorption efficiency even after 5 repeated adsorption/desorption cycles. The facile fabrication process of the Alg/C-Lig beads and superior MB removal performance imply that the Alg/C-Lig beads show a high possibility to purify dye wastewater especially cationic dye molecules.

Adsorption behavior of gardenia yellow pigment on embedded spherical cellulose adsorbent.

A spherical cellulose adsorbent embedded with black wattle extract (SABW) was prepared by an inverse suspension method, and used to adsorb the typical food pigment, gardenia yellow pigment (GYP). Results of SEM, XRD, FTIR and BET characterization showed that SABW was composed of abundant porous structures and functional groups such as –C Created by potrace 1.16, written by Peter Selinger 2001-2019 ]]> O, –OH and benzene ring groups. The batch adsorption experiments revealed that SABW presented excellent adsorption performance for GYP with a high adsorption percentage of 97.96%. The adsorption process followed the Langmuir and Freundlich adsorption isotherm, and the experimental data were in good agreement with the pseudo-second order dynamic model. Furthermore, the main adsorption mechanism involved hydrogen bonding, electrostatic interaction and pore adsorption. Importantly, the desorption and regeneration experiments showed that SABW had satisfactory reusability and retained 92.30% adsorption after 4 cycles. The above results provide a vital theoretical basis for the extraction of GYP.

Controlled preparation of a MCC-g-AM/EDA/PA loaded Fe(iii) adsorbent by the pre-radiation grafting method and its application for the adsorption removal of phosphate.

A new spherical cellulose-based adsorbent and high phosphate removal rate microcrystalline cellulose-g-acrylamide/ethylenediamine/phthalic anhydride (MCC-g-AM/EDA/PA) loaded Fe(iii) adsorbent was prepared by a pre-radiation grafting and chemical modification method. Fe(iii) was successfully introduced into the modified grafted chains of the MCC-g-AM/EDA/PA resin, and characterized by FTIR, TG, XRD, SEM and XPS. The optimized conditions for the grafting reaction of acrylamide (AM) onto MCC were 20% AM emulsion at an absorbed dose of 30 kGy, and a grafting rate as high as 247%. In addition, the adsorption performance of the adsorbent was tested by static adsorption experiments with phosphate. The adsorbent resin showed excellent adsorption performance under alkaline conditions, contributions to the synergetic effect of precipitation, and inner-sphere surface complex reactions. The adsorption efficiency can reach 89.7% at low concentration. In summary, the neotype spherical cellulose-based adsorbent has the advantages of being separation-free in bulk materials, avoiding secondary pollution, and being easy to recycle, and it could be employed as an environmentally friendly adsorbent for phosphate removal in eutrophic water.

Nanofibrous spherical cage mimicking a ball of pearl necklaces for super capture of heavy metal ions

Innovatively designed nanofibrous spherical adsorbents allow the precipitation of heavy metal ions, confine the precipitate within the adsorbents, and achieve a remarkable decrease in the pressure drop.

Self-Peristaltic Gel-Microspheres Based on Carboxymethyl Cellulose and Polyacrylic Acid Prepared via Inverse Suspension for Recovery Rare Earth Ions from Aqueous Solution

In this study, cross-linked microspheres formed by interpenetrating networks of carboxymethyl cellulose and polyacrylic acid were prepared via inverse-suspension polymerization. The resultant has high adsorption capacity for rare earth ions, can reach 313 mg/g for Ce3+ under the condition of pH 6 at normal temperature. Unique self-creep characteristic gives it a fast-speed adsorption performance, which makes it to reach adsorption equilibrium within 70 min. It also has good reuse performance; its adsorption capacity decrease rate is only 21% after six adsorption–desorption cycles. Adsorption kinetics and thermodynamic studies and adsorption isothermal analysis were researched as well. The research conclusion suggested that this adsorbent is a promising adsorbent for recovering the rare earth ions from wastewater containing rare earth. And all related experiments show that ISP method is effective for making spherical macromolecular adsorbents via water-soluble monomers.

Effect of mesoporous characteristics on competitive adsorption kinetics of uremic-like toxin and atorvastatin on spherical carbon adsorbents for an in vitro chronic renal failure therapeutic model

Indole-3-acetic acid (IA, urine-like toxin) coexisting with atorvastatin (AT) was adsorbed by spherical carbonaceous adsorbents (SCs). The relationship between the competitive adsorption kinetics and the mesoporous structures was investigated. The pore structures of the four SCs were analyzed using the Hg and gas adsorption methods. SC adsorption tests were performed using the dissolution test with the paddle method with an SC sample in distilled water containing IA and/or AT at 37.0 °C. The amounts of IA and AT adsorbed on SCs in single- and binary-drug administration tests were measured based on the ultraviolet-visible spectra using classical least squares analysis. Rate constants for the drug adsorption of IA and AT by SCs (kIA and kAT, respectively) were suppressed by the effect of coexisting drugs. The suppression of IA adsorption by the coexisting drug was dependent on the pore structure of the SCs. kIA and kAT against the SCs were competitively inhibited by coexisting drugs.