The adsorption isotherm and thermodynamic studies of rhenium onto mesoporous silica nanoparticles

Prihatiningsih, Maria Christina; Basuki, Kris Tri; Brawijaya, P.; Saputra, Andri

doi:10.1088/1742-6596/1436/1/012124

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…Generally, SnCl 2 is soluble in acidic conditions (pH 1.5–2) . Considering this, we used dissolved SnCl 2 as a reducing agent, which transformed 188 ReO 4 – (soluble) into the hydrated form ( 188 ReO 2 · x H 2 O), which is insoluble in aqueous solutions and, as a consequence, can be adsorbed onto the surface of NPs. − We should note that the 188 Re nanoaggregates are mostly formed at a neutral pH (6.5–7), indicating that the pH values of the reaction should be carefully controlled during the radiolabeling procedure. Next, we investigated the influence of Tween 80 on RE (%), which is used for the stabilization of NPs during the radiolabeling process.…”

Section: Resultsmentioning

confidence: 99%

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

et al. 2022

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Biomedical application of various nanoparticles (NPs) for bioimaging and therapeutic purposes attracts huge interest. In particular, NPs can be used as nanocarriers of radionuclides for radiotherapy of malignant neoplasms. However, most approaches for NP radiolabeling are complicated, and their transfer into clinical practice is difficult due to their multistep process, limited reproducibility, and lack of an automated radiolabeling procedure. Here, we develop a universal method suitable for radiolabeling of various NPs (either organic or inorganic) for internal radiotherapy of B16-F10 melanoma tumors. The obtained NPs (polylactide, silica, gold, and iron oxide) were labeled with diagnostic ( 99m Tc) and therapeutic ( 188 Re) radionuclides with a high radiolabeling efficiency (∼94− 98%) and radiochemical stability (>95%). After their intratumoral administration, these various 188 Re-labeled NPs mostly remained in the tumor, inhibiting the tumor growth rate compared to the untreated tumors. The absence of any significant leakage of the radiolabeled NPs in healthy tissues (the liver, heart, kidneys, lungs, and spleen) was confirmed by single-photon emission computed tomography (SPECT) and direct radiometry analysis. Histological analysis revealed no abnormal changes in healthy organs after the therapy (e.g., no acute pathologic findings were detected in the liver and kidneys). As a result, the treatment of mice with 188 Relabeled NPs led to a prolonged survival compared to the control group. Thus, our study provides general guidance for the use of different types of radiolabeled NPs in radionuclide therapy.

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Section: Resultsmentioning

confidence: 99%

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

et al. 2022

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“…The positive value of ΔHads° implies that the adsorption is endothermic (Fathy et al, 2016), indicating that the adsorption not suitable to be conducted at low temperatures is. The lower the ΔSads° value, the more stable is the process of running the reaction (Prihatiningsih et al, 2020). The obtained ΔSads° value is 0.0860, which indicates that the adsorption is quite stable.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 90%

Adsorption of Strontium from an Aqueous Solution by TiO2-Pillared Zeolite

Basuki¹,

Fatuzzahroh²,

Ariyanti³

et al. 2021

IJTech

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Strontium is a heavy metal that is commonly found in many groundwater systems because of migration from historic nuclear waste storage sites. Its radiation effect can cause bone cancer, tumors, and leukemia. An economical and the most effective method to remove heavy metals from aqueous solutions is adsorption. In this study, we synthesized a TiO2-pillared zeolite to improve the adsorption efficiency of the zeolite. The TiO2-pillared zeolite was synthesized via the pillarization process. Adsorbent characterization was done using X-ray powder diffraction, which showed that TiO2 was successfully pillared. Fourier-transform infrared spectroscopy showed a shift in the peak at a wavenumber of 3425.70 cm −1 , which can be attributed to the addition of TiO2. A parameter study conducted using a batch experiment showed that optimal strontium adsorption took place at pH 5 and contact time of 80 min. The Freundlich adsorption isotherm fitted the experimental data well, illustrating the adsorption of strontium as being non-ideal, reversible, and multilayer adsorption that occurs on the heterogeneous surface of the TiO2-pillared zeolite. A thermodynamic study indicated that strontium adsorption on the TiO2-pillared zeolite was an endothermic process, takes place spontaneously, and is quite stable.

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“…Re occurs in the associated multi-molybdenum, copper and other minerals in the form of isomorphism and the Re included in very few, so it is difficult to extract a low purity (Prihatiningsih et al , 2020). On the other hand, spent superalloy units usually cannot be recycled due to their exceptional strength, ruggedness and superior corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Preparation and selectivity evaluation of grafted temperature-responsive imprinted composite polyvinylidene fluoride resin membranes for selective adsorption of ReO₄⁻

Zhang

Ou²,

et al. 2021

PRT

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Purpose A novel grafted temperature-responsive ReO4− Imprinted composite membranes (Re-ICMs) was successfully prepared by using polyvinylidene fluoride (PVDF) resin membranes as substrates, this study aimed to separate and purify ReO effectively. Design/methodology/approach Re-ICMs were synthesized by PVDF resin membranes as the substrate, acrylic acid (AA), acrylamide (AM), ethylene glycol dimethacrylate (EGDMA) were functional monomers. The morphology and structure of Re-ICMs were characterized by scanning electron microscope and Fourier transform infrared spectroscopy. Findings The maximum adsorption capacity toward ReO4− was 0.1,163 mmol/g and the separation decree had relation to MnO4− was 19.3. The optimal operation conditions were studied detailedly and the results as follows: the molar ratios of AA, AM, EGDMA, ascorbic acid, NH4ReO4, were 0.8, 0.96, 0.02, 0.003 and 0.006. The optimal time and temperature were 20 h and 40°C, respectively. The Langmuir and pseudo-second-order models were fit these adsorption characteristics well. Practical implications Rhenium (Re) is mainly used to chemical petroleum and make superalloys for jet engine parts. This study was representing a technology in separate and purify of Re, which provided a method for the development of the petroleum and aviation industry. Originality/value This contribution provided a novel method to separate ReO4− from MnO4−. The maximum adsorption capacity was 0.1163 mmol/g at 35°C and the adsorption equilibrium time was within 2 h. Meanwhile, the adsorption selectivity rate ReO4−/MnO4− was 19.3 and the desorption rate was 78.3%. Controlling the adsorption experiment at 35°C and desorption experiment at 25°C in aqueous solution, it could remain 61.3% of the initial adsorption capacity with the adsorption selectivity rate of 13.3 by 10 adsorption/desorption cycles, a slight decrease, varied from 78.3% to 65.3%, in desorption rate was observed.

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The adsorption isotherm and thermodynamic studies of rhenium onto mesoporous silica nanoparticles

Cited by 4 publications

References 24 publications

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

Adsorption of Strontium from an Aqueous Solution by TiO2-Pillared Zeolite

Preparation and selectivity evaluation of grafted temperature-responsive imprinted composite polyvinylidene fluoride resin membranes for selective adsorption of ReO₄⁻

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The adsorption isotherm and thermodynamic studies of rhenium onto mesoporous silica nanoparticles

Cited by 4 publications

References 24 publications

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

Universal Chelator-Free Radiolabeling of Organic and Inorganic-Based Nanocarriers with Diagnostic and Therapeutic Isotopes for Internal Radiotherapy

Adsorption of Strontium from an Aqueous Solution by TiO2-Pillared Zeolite

Preparation and selectivity evaluation of grafted temperature-responsive imprinted composite polyvinylidene fluoride resin membranes for selective adsorption of ReO4−

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Preparation and selectivity evaluation of grafted temperature-responsive imprinted composite polyvinylidene fluoride resin membranes for selective adsorption of ReO₄⁻