Efficient removal of Sr(II) from aqueous solution by melamine-trimesic acid modified attapulgite composite

Liu, Dechun; Zheng, Haizhong; Yang, Wenbin; Chen, Yang

doi:10.1007/s10967-019-06570-1

Cited by 9 publications

(2 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, 10 g of commercially available attapulgite was added into 1 L of 8 mol/L concentrated hydrochloric acid solution, stirred at 70 °C for 12 h and then washed with deionized water until it reached neutrality. Then, the acid treatment product was collected by suction filtration and further dried in a 60 °C vacuum oven for 12 h. The obtained product was ground with a disintegrator for standby and named acid-treated ATP (a-ATP) [ 28 ].…”

Section: Methodsmentioning

confidence: 99%

ZIF-67 In Situ Grown on Attapulgite: A Flame Retardant Synergist for Ethylene Vinyl Acetate/Magnesium Hydroxide Composites

Yang

Yin

et al. 2022

Polymers

View full text Add to dashboard Cite

ZIF-67@ATP was prepared by the in situ growth of the zeolite imidazole frame (ZIF-67) on the surface of attapulgite (ATP). The structure and surface morphology of ZIF-67@ATP were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Different mass fractions of ATP and ZIF-67@ATP were added to ethylene vinyl acetate (EVA)/magnesium hydroxide (MH) composites as flame retardant synergists. The flame retardancy of EVA composites was evaluated by the limiting oxygen index (LOI) test, UL-94 test and cone calorimeter test. Composites containing 3 wt% of ZIF-67@ATP reached an LOI value of 43% and a V-0 rating in the UL-94 test, and the ignition time of the composite increased from 38 s to 56 s. The tensile strength and impact strength of the composites did not change significantly, but the elongation at break increased greatly. Typically, for composites containing 4 wt% of ZIF-67@ATP, the elongation at break of the composites increased from 69.5% to 522.2% compared to the samples without the synergist. This study provides novel insights into the application of attapulgite in the field of flame retardant polymer materials.

show abstract

Section: Methodsmentioning

confidence: 99%

ZIF-67 In Situ Grown on Attapulgite: A Flame Retardant Synergist for Ethylene Vinyl Acetate/Magnesium Hydroxide Composites

Yang

Yin

et al. 2022

Polymers

View full text Add to dashboard Cite

show abstract

“…The experimental data were fitted by two kinetic models, namely, the nonlinear pseudo-first-order model (Equation ( 6)) and pseudo-second-order model (Equation ( 7)), which have investigated the controlling mechanism of adsorption processes. The pseudofirst-order model assumes that the number of the free adsorption position on the surface of the adsorbent decides the adsorption rate, and the pseudo-second-order model assumes that the square of the number of the free adsorption position on the surface of the adsorbent decides the adsorption rate, mainly controlled by chemical adsorption [64]:…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Lü

Feng

Otero³

et al. 2023

Separations

View full text Add to dashboard Cite

The cooling water of nuclear power plants and discarded crayfish shells (CS), both containing Sr(II), are waste resources that cause environmental pollution and endanger human health. In this study, magnetic biochar produced by crayfish shells (mag@CSBC) was used as an adsorbent to remove radionuclide Sr(II) in an aqueous solution and under irradiation conditions. Scanning electron microscopy, X-ray diffraction analysis, Fourier-transform infrared spectroscopy and vibration sample magnetometer analysis were used to characterize mag@CSBC. In addition, an isothermal adsorption experiment conducted under irradiation conditions determined that the maximum adsorption capacity of mag@CSBC was 21.902 mg/g, which was 1.896 mg/g higher than that from experiments conducted under conditions without irradiation and more suitable for the Freundlich isotherm model. The kinetic experiment proved that irradiation could improve the adsorption cap acity of mag@CSBC and reduce the adsorption equilibrium time. At the same time, the experiment further proved that, under irradiated conditions, the adsorption rate of mag@CSBC can reach more than 90%, and the adsorption capacity is the highest when the pH is 8 and the reaction process is exothermic. Competitive adsorption with Na(I) has a high selectivity and strong recyclability. Finally, the mechanism of Sr(II) adsorption by mag@CSBC under irradiation was studied. In conclusion, mag@CSBC, as a low-cost, easy-to-synthesize, environmentally friendly and easy-to-recycle adsorbent, can be applied in batches for the removal of Sr(II) in aqueous solutions. In particular, the concept of using irradiation technology to optimize adsorption behavior serves as an inspiration for future research.

show abstract

Triazole functional groups modified attapulgite with petal-like morphology for efficient removal of strontium contaminant from aqueous solution

Liu

Zheng

2020

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Efficient removal of Sr(II) from aqueous solution by melamine-trimesic acid modified attapulgite composite

Cited by 9 publications

References 62 publications

ZIF-67 In Situ Grown on Attapulgite: A Flame Retardant Synergist for Ethylene Vinyl Acetate/Magnesium Hydroxide Composites

ZIF-67 In Situ Grown on Attapulgite: A Flame Retardant Synergist for Ethylene Vinyl Acetate/Magnesium Hydroxide Composites

Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar

Triazole functional groups modified attapulgite with petal-like morphology for efficient removal of strontium contaminant from aqueous solution

Contact Info

Product

Resources

About