Removal of cesium and strontium using natural attapulgite: evaluation of adsorption isotherm and thermodynamic data

Kaygun, Aysun; Eral, M.; Erenturk, Sema

doi:10.1007/s10967-016-4989-9

Cited by 25 publications

(4 citation statements)

References 25 publications

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“…Nowadays, water contamination problems resulting from the indiscriminate discharge of antibiotic, dye, and heavy metal pollutants have become a leading environmental issue. − As a result of the highly toxic or non-biodegradable components discharged in the water, such an environmental issue not only jeopardizes human health but also can pose a significant threat to the entire ecosystem. , Because dyes are highly toxic and difficult to be degraded even at low concentrations, the dye-containing wastewater has garnered significant concerns . In the past few decades, various methods such as physical, chemical, and biological decolorization have been used to detoxify dye wastewater and have achieved great results in the academic and industrial fields.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Attapulgite for the Adsorption of Methylene Blue: Synthesis, Characterization, and Adsorption Mechanism

et al. 2021

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Attapulgite (denoted as APT, also called palygorskite) has been regarded as the green material in the "21st century world" and has attracted widespread attention due to its advantages of low cost, natural abundance, nontoxic nature, and environmental friendliness. However, the limited adsorption sites and surface charges of natural APT greatly hinder its application as an adsorbent in industrial fields. In this work, natural APT was modified with sodium humate (SA) via a facile one-step hydrothermal process to improve its adsorption capacity and systematically studied its ability to remove methylene blue (MB) from aqueous solutions. The effect of hydrothermal modification in the presence of SA on the microscopic structure, morphology, and physicochemical properties of APT was studied by field-emission scanning electron microscopy, Fourier transform infrared spectrometry, X-ray diffraction, and Brunauer−Emmett−Teller analyses. The adsorption properties of the modified APT toward MB were evaluated systematically. The results demonstrated that the modified APT has a high adsorption capacity of 227.27 mg/g and also shows a high removal rate up to 99.7% toward MB in a dye solution with an initial concentration of 150 mg/L, which was a 64.7% increase as compared to that of raw APT. The adsorption kinetics could be fitted to the pseudo-second-order model, while the adsorption isotherm could be welldescribed with the Langmuir model. It was concluded that electrostatic attraction, hydrogen-bonding interaction, and chemical association are the main driving force during the adsorption process.

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Section: Introductionmentioning

confidence: 99%

Functionalized Attapulgite for the Adsorption of Methylene Blue: Synthesis, Characterization, and Adsorption Mechanism

et al. 2021

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“…5,[45][46][47] Typically, magnesium aluminosilicate layers contain exchangeable cations such as Mg 2+ , K + and Na + . These native species can be ionexchanged for other metal ions, [48][49][50][51] so that lead ions can be encapsulated through the ion-exchange process. The surface of the PAL channel contains plentiful functional groups, including Si-OH, Mg-OH, and Al-OH, all of which can form H-bonds and coordination bonds with the halide anions and lead ions of the perovskite QDs, respectively.…”

Section: Introductionmentioning

confidence: 99%

Confinement and passivation of perovskite quantum dots in porous natural palygorskite toward an efficient and ultrastable light-harvesting system in water

Meng

Zhen

et al. 2022

Chem. Sci.

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“…In general, the radionuclide Sr 2+ adsorbs to a wide range of aluminosilicates, Fe oxides and other soil minerals via weakly bound surface complexes [3]. Several researchers also used natural sorption materials, such as bentonite, natural zeolite, gibbsite, mineral mixture, activated carbon, clinoptilolite, and attapulgite, as low-cost options for the removal of radionuclide from liquid wastes [16,17,18,19,20]. The adsorption capacity of various materials for strontium is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the natural clay mineral based low-cost adsorbents have become attractive again for water purification and radioactive waste management [16]. For example, natural clay materials such as attapulgite and bentonite have been used as back fill and buffer material in waste repositories to control the spreading of radionuclides [1,26].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Adsorption Behavior of Strontium from Aqueous Solutions onto Chitosan-Fuller’s Earth Beads

et al. 2019

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Fuller’s earth spherical beads using chitosan as a binder were prepared for the removal of strontium ions from aqueous solution. The adsorbents were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which revealed the porous nature of the beads. The Brunauer–Emmett–Teller (BET) surface area of the beads was found to be 48.5 m2/g. The adsorption capacities of the beads were evaluated under both batch and dynamic conditions. The adsorption capacity was found to be ~29 mg/g of adsorbent at 298 K when the equilibrium concentration of strontium in the solution was 925 mg/L at pH 6.5. The X-ray photoelectron spectroscopy (XPS) data suggest that strontium uptake by the beads occurs mainly through an ion-exchange process. Kinetic data indicate that the sorption of strontium onto the beads follows anomalous diffusion. Thermodynamic data suggest that the ion-exchange of Sr2+ on the bead surface was feasible, spontaneous and endothermic in nature.

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Removal of cesium and strontium using natural attapulgite: evaluation of adsorption isotherm and thermodynamic data

Cited by 25 publications

References 25 publications

Functionalized Attapulgite for the Adsorption of Methylene Blue: Synthesis, Characterization, and Adsorption Mechanism

Functionalized Attapulgite for the Adsorption of Methylene Blue: Synthesis, Characterization, and Adsorption Mechanism

Confinement and passivation of perovskite quantum dots in porous natural palygorskite toward an efficient and ultrastable light-harvesting system in water

Characterization and Adsorption Behavior of Strontium from Aqueous Solutions onto Chitosan-Fuller’s Earth Beads

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