Preparation of potassium niobium sulfide and its selective adsorption properties for Sr2+ and Co2+

Liang, Chengqiang; Jia, Meilin; Wang, Xiaowei; Du, Zongliang; Men, Jinfeng; Ding, Hao

doi:10.1007/s10967-019-06685-5

Cited by 17 publications

(8 citation statements)

References 31 publications

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“…Metal sulfides are newly emerging Cs + and Sr 2+ ion exchangers showing high adsorption capacity and a faster kinetic response, which is ascribed to their flexible frameworks and strong affinity of soft Lewis basic S 2– for Cs + or Sr 2+ ions. ,,− In recent years, the metal sulfides with exchangeable alkaline metal ions (K + or Na + ions) have been reported as promising ion exchangers for Cs + and Sr 2+ ions. ,,− ,− Protonated organic amine cation-directed metal sulfides with superior Cs + and Sr 2+ removal performances have also been reported. ,,,,,, However, systematic study of the removal of Cs + or Sr 2+ ions by metal sulfides under acidic conditions is still rare. , …”

Section: Introductionmentioning

confidence: 99%

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Jin

Zhang

et al. 2021

ACS EST Water

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137 Cs + and 90 Sr 2+ are highly soluble, highly environmentally mobile, and strongly radiotoxic. Efficiently sequestering 137 Cs + and 90 Sr 2+ ions from aqueous solutions remains a serious challenge, especially from acidic environments because of the effects of protonation and poor stabilities of materials. Here, efficient removal of Cs + and Sr 2+ ions is achieved by a layered thiostannate, namely [(EtNH 3 ) 1.68 (Et 2 NH 2 ) 0.32 ]Sn 3 S 7 •0.68H 2 O (FJSM-SnS-4), which exhibits excellent acid−base and β and γ irradiation resistances. FJSM-SnS-4 possesses high maximum adsorption capacities and rapid kinetics for Cs + and Sr 2+ ions under neutral conditions. It can even capture Cs + ions under acidic conditions (e.g., pH 1.6 and 0.4). It is interesting that FJSM-SnS-4 has excellent selectivity for Sr 2+ ions in neutral environments, whereas it prefers capturing Cs + from 1 M HCl solutions with coexisting K + , Na + , Ca 2+ , Mg 2+ , and Sr 2+ ions. The Cs + and Sr 2+ adsorption mechanism has been revealed at the molecular level by single-crystal structural analysis coupled with XPS, EXAFS, and EA characterization, that is, ion exchange between Cs + and Sr 2+ ions and protonated organic amines in interlayer space owing to the flexibility of the current layered thiostannate framework and the strong affinity of the soft basic S 2− of the framework for Cs + and Sr 2+ ions.

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Section: Introductionmentioning

confidence: 99%

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Jin

Zhang

et al. 2021

ACS EST Water

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“…The Weber–Morris model assumes that diffusion resistance only works within a short period of time when the adsorption reaction starts or even negligible. The diffusion direction of the adsorbent is random, and the diffusion coefficient is constant . Its equation is as follows: Q t = I W + K W t 1 / 2 where K W (mg·(g·h 1/2 ) −1 ) is the intraparticle diffusion rate constant and I W is the intercept for Weber–Morris models.…”

Section: Resultsmentioning

confidence: 99%

“…The diffusion direction of the adsorbent is random, and the diffusion coefficient is constant. 43 Its equation is as follows: 44…”

Section: Effect Of Phmentioning

confidence: 99%

Metal Organic Frameworks of ANA Topology as an Effective Adsorbent for Co(II) and Mn(II) in Solution

et al. 2023

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Long-lived radionuclides such as 60Co and 54Mn in radioactive waste water must be properly treated to protect the environment from long-term radioactive hazard. In this study, nine zeolite imidazole frameworks (ZIFs) were initially synthesized to investigate an effective adsorbent for Co(II) and Mn(II) in solution. Zeolite imidazole framework-14 (ZIF-14) with good performance was selected, and subsequent characterization and adsorption performance tests were conducted. The results show that ZIF-14 has good hydrothermal stability within 520 °C. Under the conditions of pH = 6.72, T = 303 K and the initial concentration of 500 mg·L–1, the saturated adsorption capacity for Co(II) and Mn(II) reached 148.55 mg·g–1 and 252.85 mg·g–1, respectively. The analysis of thermodynamic parameters shows that the adsorption process of ZIF-14 to Co(II) and Mn(II) is spontaneous and endothermic. The pseudo-second-order kinetic model, Langmuir isotherm model, and Boyd model are more in line with the adsorption process of Co(II) and Mn(II) by ZIF-14, which proves that the active sites on the surface of ZIF-14 are evenly distributed, and the adsorption process is single-molecule chemical layer adsorption. In addition, the liquid film diffusion dominates the adsorption rate during the adsorption process of Co(II) and Mn(II) by ZIF-14. ZIF-14 has good selectivity for cobalt and manganese in both high-concentration interference ion solution and multimetal ion solution with the same concentration. Moreover, ZIF-14 still has good adsorption performance after five times of elution.

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“…To investigate the factors affecting the adsorption rate of MMIP and MNIP, the Boyd model to control the external diffusion rate and the Weber‐Morris model to control the internal diffusion rate were used to analyze the experimental results. The Boyd model assumes that the diffusion resistance mainly comes from the liquid film formed on the particle surface, and are calculated as following Eq (6) and 7: [37]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm B}{_{{\rm t}}}={\rm K}{_{{\rm B}}}{\rm t}+{\rm I}{_{{\rm B}}}\hfill\cr}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm B}{_{{\rm t}}}=- 0.4977- {\rm ln}\ (1- {{{{\rm q}}_{{\rm t}}}\over{{{\rm q}}_{{\rm e}}}})\hfill\cr}}

…”

Section: Resultsmentioning

confidence: 99%

“…[36] To investigate the factors affecting the adsorption rate of MMIP and MNIP, the Boyd model to control the external diffusion rate and the Weber-Morris model to control the internal diffusion rate were used to analyze the experimental results. The Boyd model assumes that the diffusion resistance mainly comes from the liquid film formed on the particle surface, and are calculated as following Eq (6) and ( 7): [37] B…”

Section: Effect Of Contact Time and Adsorption Kineticsmentioning

confidence: 99%

Preparation a Magnetic Molecular Imprinted Polymer for Specific Adsorption of Pharmaceutical Pollutants

Öter

2023

ChemistrySelect

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Amoxicillin (AMX) is an antibiotic commonly used to treat bacterial and respiratory diseases in humans and animals. In this study, magnetically imprinted polymers (MMIPs) were successfully synthesized and characterized by the surface imprinting method to selectively separate AMX from an aqueous medium. The suitability of kinetic models and isothermal models for the adsorption of AMX from aqueous solutions using magnetic polymers was compared with an unprinted reference polymer (MNIP). The obtained data showed that the adsorption process is compatible with the pseudo‐second order kinetic model and Langmuir isotherm. In addition, adsorption selectivity experiments were performed and it was found that the MMIPs exhibited excellent selective adsorption capacity for AMX. The MMIPs possessed an adsorption capacity of 134 mg/g for AMX and the imprinting factor was 2.23. The MMIPs were also recyclable and retained 86 % of their adsorption capacity after 7 cycles. Based on these results, the study provides a sustainable option in terms of high added value, environmentally friendly, flexible, safe, energy efficient and cost effective in terms of effective removal of pollutants and recycling of adsorbents.

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Preparation of potassium niobium sulfide and its selective adsorption properties for Sr2+ and Co2+

Cited by 17 publications

References 31 publications

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Metal Organic Frameworks of ANA Topology as an Effective Adsorbent for Co(II) and Mn(II) in Solution

Preparation a Magnetic Molecular Imprinted Polymer for Specific Adsorption of Pharmaceutical Pollutants

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Preparation of potassium niobium sulfide and its selective adsorption properties for Sr2+ and Co2+

Cited by 17 publications

References 31 publications

Rapid and Selective Uptake of Cs+ and Sr2+ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs+ and Sr2+ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Metal Organic Frameworks of ANA Topology as an Effective Adsorbent for Co(II) and Mn(II) in Solution

Preparation a Magnetic Molecular Imprinted Polymer for Specific Adsorption of Pharmaceutical Pollutants

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Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances