Enhanced adsorption of radioactive strontium ions from aqueous solution by H2O2-modified attapulgite

Liu, Dechun; Zheng, Haizhong

doi:10.1007/s10967-017-5184-3

Cited by 11 publications

(4 citation statements)

References 48 publications

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“…Palygorskite has received considerable attention in the fields of pigments, 5,6 decolorizing agent, 7,8 thickeners, 9,10 colloid, 11,12 mycotoxin adsorbents, [13][14][15][16][17] radioactive material adsorbents, [18][19][20][21] and drilling muds 22,23 for the large number of channels in its internal structure. 24 At the same time, it is widely used in friction materials, 25,26 carrier, 27 catalytic materials, 28 rubber, and plastic composites 29,30 because of the nano-scaled slender rod crystals.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution and sintering properties of palygorskite nanofibers

Wang

Lijuan

Zhang

et al. 2020

Int J Applied Ceramic Tech

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In this study, the morphological evolution and sintering properties of the palygorskite nanofibers were studied along with the increase of temperature, using raw palygorskite as materials. The palygorskite powder was calcined at different temperatures in the range of 100°C‐1200°C, and the microstructural evolution of the palygorskite nanofibers was investigated by thermogravimetric and differential thermal analysis (TG‐DTA), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and high‐resolution transmission electron microscope (HRTEM). Furthermore, the palygorskite powder was shaped to bars by dry pressing and sintered from 700°C to 1200°C. The properties of the sintered palygorskite were characterized by bending strength, mercury intrusion porosimeter (MIP), and stepwise isothermal dilatometry (SID). The results showed that the morphology of palygorskite nanofibers maintained unchanged till 1000°C. The palygorskite nanofibers molted to bind each other and formed a solid interwoven network structure at 1100°C. Correspondingly, it was shown from the sharply decrease of the sintered palygorskite porosity from 45.46% at 1000°C to 1.82% at 1100°C that the dense sintering of palygorskite started at 1100°C. With the sintering proceeding, some closed micropores fused each other to form bigger opening pores, resulting in a slight increase of porosity at 1200°C. However, the pore size distribution got more uniform and the density of the sintered body increased. So the bending strength of the sintered body reached the maximum of 176.67 Mpa and finally the main crystalline phases of the sintered sample changed to quartz, enstatite, and kyanite. The sintering activation energy of the palygorskite was measured by means of SID with a value of 906.46 kJ·mol−1.

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Section: Introductionmentioning

confidence: 99%

Microstructural evolution and sintering properties of palygorskite nanofibers

Wang

Lijuan

Zhang

et al. 2020

Int J Applied Ceramic Tech

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“…Palygorskite (PAL) is a magnesium aluminum silicate mineral with a hydrated chain-layer structure. 26 PAL can be formed in fibrous single crystals. It has a unique dispersion, high-temperature resistance, alkali resistance, a good adsorption ability, good drug-loading capacity, as well as good biological activity and compatibility.…”

Section: Introductionmentioning

confidence: 99%

“…Palygorskite (PAL) is a magnesium aluminum silicate mineral with a hydrated chain-layer structure . PAL can be formed in fibrous single crystals.…”

Section: Introductionmentioning

confidence: 99%

Modified Alginate-Based Hydrogel as a Carrier of the CB2 Agonist JWH133 for Bone Engineering

Zhou

et al. 2021

ACS Omega

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Alginate hydrogels have been widely used as excellent scaffold materials for implantation in biological systems because of their good biocompatibility. However, it is difficult to repair bone defects with these materials because of their poor mechanical properties. The aim of the present study was to fabricate a novel degradable alginate/palygorskite (PAL) composite hydrogel with good mechanical properties and investigate its potential for application in bone defect repair. The modified alginate-based hydrogel with increasing PAL content exhibited better mechanical properties than the original alginate hydrogel. In addition, the resulting composite hydrogel was thoroughly characterized by scanning electron microscopy (SEM). With increasing PAL content, the swelling ratio of the hydrogel increased in PBS (pH = 7.4). In vitro cytocompatibility was evaluated using bone marrow-derived mesenchymal stem cells (BMSCs) to confirm that the developed composite hydrogel was cytocompatible after 1, 3, and 7 days. All these results suggest that the developed composite hydrogel has great potential for bone tissue engineering applications. JWH133 is a selective agonist of cannabinoid receptor type 2 (CB2), which exerts dual anti-inflammatory and anti-osteoclastogenic effects. We co-cultured BMSCs with composite hydrogels loaded with JWH133, and analysis of proliferation and osteogenic differentiation indicated that the composite hydrogel loaded with JWH133 may enhance the osteogenic differentiation of rat BMSCs. Furthermore, we found that the composite hydrogel loaded with JWH133 inhibited osteoclast formation and the mRNA expression of osteoclast-specific markers. In summary, the developed composite hydrogel has a high drug-loading capacity, good biocompatibility, and strong potential as a drug carrier for treating osteoporosis by promoting osteoblast and inhibiting osteoclast formation and function.

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“…[7][8][9][10] Numerous studies have considered the removal of Sr 2+ from aqueous environments using various adsorbents. Clay minerals such as kaolinite 11 and attapulgite 12 were frequently studied due to its large edge surface and high ability for ion exchange which is common and effective mechanism for adsorption in aqueous systems. 13,14 Along with the ability for ion exchange, the porous structure is usually favored when designing effective adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO₂ derived porous carbon

et al. 2017

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Enhanced adsorption of radioactive strontium ions from aqueous solution by H2O2-modified attapulgite

Cited by 11 publications

References 48 publications

Microstructural evolution and sintering properties of palygorskite nanofibers

Microstructural evolution and sintering properties of palygorskite nanofibers

Modified Alginate-Based Hydrogel as a Carrier of the CB2 Agonist JWH133 for Bone Engineering

Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO₂ derived porous carbon

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Enhanced adsorption of radioactive strontium ions from aqueous solution by H2O2-modified attapulgite

Cited by 11 publications

References 48 publications

Microstructural evolution and sintering properties of palygorskite nanofibers

Microstructural evolution and sintering properties of palygorskite nanofibers

Modified Alginate-Based Hydrogel as a Carrier of the CB2 Agonist JWH133 for Bone Engineering

Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO2 derived porous carbon

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Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO₂ derived porous carbon