Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

Gong, Qianwen; Guo, Xueyi; Liang, Sha; Wang, C.; Tian, Qinghua

doi:10.1007/s13762-015-0809-y

Cited by 18 publications

(6 citation statements)

References 18 publications

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“…To demonstrate the feasibility of AFMNC as a sorbent, its Pt(IV) sorption capacity and removal rate constants were compared to those of other sorbents. ,,,,− The Pt(IV) sorption performance of AFMNC was compared to those of other adsorbents of different physical forms such as bead, fiber, resin, and powder (Table ). The contact time required to reach equilibrium was shorter for AFMNC (5 min) compared to that of other micro- and nanosized adsorbents.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Stable and Regenerable Amine Functionalized Magnetic Nanoparticles as a Potential Material for Pt(IV) Recovery from Acidic Solutions

Reddy

Wei

Song

et al. 2017

ACS Appl. Mater. Interfaces

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MnFeO@SiO-NH magnetic nanocomposite (AFMNC) adsorbent with a particle size of ∼50 nm was successfully synthesized using a facile approach. The as-prepared composite particles showed a fast binding of Pt(IV) with easy magnetic solid-liquid separation. The kinetic data were fitted to both pseudo-first and second-order rate models, indicating that AFMNC exhibited a much higher rate of Pt(IV) binding (0.125 g mg min) compared to that of commercial ion-exchange resin Amberjet 4200 (0.0002 g mg min). The equilibrium adsorption data were fitted to the Langmuir isotherm model with a relatively high sorption capacity of 380 mg/g. Scanning transmission electron microscopy analysis demonstrated the presence of platinum chloride after sorption on AFMNC, suggesting an adsorbate-adsorbent anion-exchange interaction. In addition, due to its magnetic characteristics, AFMNC can be easily separated from the aqueous medium after the sorption process. The novel nanocomposite may facilitate recovery of Pt(IV) from waste solutions.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Stable and Regenerable Amine Functionalized Magnetic Nanoparticles as a Potential Material for Pt(IV) Recovery from Acidic Solutions

Reddy

Wei

Song

et al. 2017

ACS Appl. Mater. Interfaces

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“…The larger the specific surface area, the more surface sites are available. At the optimum condition, the removal rates of quinoline by AC-1, AC-2, AC-3, AC-4, and AC-5 are 70.44, 90.61, 87.68, 87.28, and 90.61%, respectively. , …”

Section: Resultsmentioning

confidence: 95%

“…At the optimum condition, the removal rates of quinoline by AC-1, AC-2, AC-3, AC-4, and AC-5 are 70.44, 90.61, 87.68, 87.28, and 90.61%, respectively. 15,16 2.3. Adsorption Kinetics of Coking Coal.…”

Section: Resultsmentioning

confidence: 99%

Effect of Different Acid-Modified Coking Coals on Quinoline Adsorption

Wang

Ning

et al. 2019

ACS Omega

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The adsorption of quinoline from wastewater by coking coal (AC-1), HCl-modified coking coal (AC-2), HNO3-modified coking coal (AC-3), HF-modified coking coal (AC-4), and H2SO4-modified coking coals (AC-5) was investigated in this paper. The effects of acid-modified concentration, modification time, and adsorption time versus quinoline removal rate were studied by batch experiments. The quinoline concentration was measured by UV spectrophotometry, the average pore size and specific surface area of coking coal before and after modification were characterized through static nitrogen adsorption, the mineral composition of coking coal was tested by X-ray diffraction, the surface functional groups were tested by Fourier transform infrared spectroscopy, and the surface topography was tested using a scanning electron microscope. The experimental results showed that the adsorption capacity of coking coals was the best when both the modification time was 120 min and the acid-modified concentration was 0.1 mol·L–1 and the quinoline removal rate reaches the highest when the adsorption time was 120 min. The specific surface area of AC-2 increased from 2.898 to 3.637 m2·g–1, and the removal rate of quinoline increased from 77.64 to 90.61%. Acids reacted with inorganic mineral impurities within coking coal such as hydrogen vanadium phosphate hydrate, which caused an increase in the specific surface area. A new peak appeared in the Fourier transform infrared spectroscopy pattern at the wavenumber 2300 cm–1. The surface of coking coal modified by acids was rougher than that of AC-1. The adsorption capacity of coking coal was improved after modification, and modified coking coals have the highest potential as low-cost adsorbents for quinoline removal.

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“…Fungus aspergillus sp. immobilized on Cellex-T pH = 1; 298 K 0.47 [42] Cross-linked carboxy methyl chitosan hydrogels pH = 3.3; contact time 120 min; 298 K 1.16 [43] Functionalized acrylic copolymers pH = 1; time = 60 min, 303 K, 1.10 [44] DMA persimmon waste gel (DMA-PW) pH = 0.9; contact time = 24 h, 343 K, 1.28 [45] Amberlite XAD-7-dibenzo-30-crown-10 ether pH = 4; contact time = 120 min; 293 K…”

Section: Adsorbent Adsorption Conditions Adsorption Capacity [Mg/g] Rmentioning

confidence: 99%

Platinum (IV) Recovery from Waste Solutions by Adsorption onto Dibenzo-30-crown-10 Ether Immobilized on Amberlite XAD7 Resin–Factorial Design Analysis

et al. 2020

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Platinum is a precious metal with many applications, such as: catalytic converters, laboratory equipment, electrical contacts and electrodes, digital thermometers, dentistry, and jewellery. Due to its broad usage, it is essential to recover it from waste solutions resulted out of different technological processes in which it is used. Over the years, several recovery techniques were developed, adsorption being one of the simplest, effective and economical method used for platinum recovery. In the present paper a new adsorbent material (XAD7-DB30C10) for Pt (IV) recovery was used. Produced adsorbent material was characterized by X-ray dispersion (EDX), scanning electron microscopy (SEM) analysis, Fourier Transform Infrared Spectroscopy and Brunauer-Emmett-Teller (BET) surface area analysis. Adsorption isotherms, kinetic models, thermodynamic parameters and adsorption mechanism are presented in this paper. Experimental data were fitted using three non-linear adsorption isotherms: Langmuir, Freundlich and Sips, being better fitted by Sips adsorption isotherm. Obtained kinetic data were correlated well with the pseudo-second-order kinetic model, indicating that the chemical sorption was the rate-limiting step. Thermodynamic parameters (ΔG°, ΔH°, ΔS°) showed that the adsorption process was endothermic and spontaneous. After adsorption, metallic platinum was recovered from the exhausted adsorbent material by thermal treatment. Adsorption process optimisation by design of experiments was also performed, using as input obtained experimental data, and taking into account that initial platinum concentration and contact time have a significant effect on the adsorption capacity. From the optimisation process, it has been found that the maximum adsorption capacity is obtained at the maximum variation domains of the factors. By optimizing the process, a maximum adsorption capacity of 15.03 mg g−1 was achieved at a contact time of 190 min, initial concentration of 141.06 mg L−1 and the temperature of 45 °C.

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Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

Cited by 18 publications

References 18 publications

Fabrication of Stable and Regenerable Amine Functionalized Magnetic Nanoparticles as a Potential Material for Pt(IV) Recovery from Acidic Solutions

Fabrication of Stable and Regenerable Amine Functionalized Magnetic Nanoparticles as a Potential Material for Pt(IV) Recovery from Acidic Solutions

Effect of Different Acid-Modified Coking Coals on Quinoline Adsorption

Platinum (IV) Recovery from Waste Solutions by Adsorption onto Dibenzo-30-crown-10 Ether Immobilized on Amberlite XAD7 Resin–Factorial Design Analysis

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