Application of a new amidoxime surfactant in flotation separation of scheelite and calcite: Adsorption mechanism and DFT calculation

Huang, Zhiqiang; Shuai, Shuyi; Burov, Vladimir E.; Пойлов, В З; Li, Fangxu; Wang, Hongling; Liu, Rukuan; Zhang, Shiyong; Cheng, Chen; Li, Wenyuan; Yu, Xinyang; He, Guichun; Fu, Weng

doi:10.1016/j.molliq.2022.120036

Cited by 44 publications

(10 citation statements)

References 54 publications

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“…According to the FTIR spectra in Figure S4a, −OH stretching vibration (3430 cm –1 ), , CO stretching vibration (1631 cm –1 ), and O–H group bending vibration (1416 cm –1 ) were observed in SFB 2‑900 . However, after adsorbing CIP, the characteristic peaks of the material hardly changed, indicating that chemical adsorption was not the major driving force.…”

Section: Resultsmentioning

confidence: 99%

Removal of Ciprofloxacin from Water by a Potassium Carbonate-Activated Sycamore Floc-Based Carbonaceous Adsorbent: Adsorption Behavior and Mechanism

Xue

Zhang

et al. 2023

Langmuir

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In this study, a porous carbonaceous adsorbent was prepared from sycamore flocs by pyrolysis method and K2CO3 activation. The effects of preparative conditions of the material on its adsorptive property were explored. The optimal material (SFB2‑900) was obtained with a K2CO3/biochar mass ratio of 2:1 at an activation temperature of 900 °C, possessing a huge surface specific area (1651.27 m2/g). The largest adsorption capacity for ciprofloxacin on SFB2‑900 was up to 430.25 mg/g. The adsorption behavior was well described by the pseudo-second-order kinetic model and the Langmuir isothermal model. Meanwhile, this process was spontaneous and exothermic. The obtained material showed excellent adsorption performance in the conditions of diverse pH range, ionic strength, and water quality of the solution. The optimum adsorption conditions (pH = 7.01, dosage = 0.6 g/L, and C 0 = 52.94 mg/L) determined based on the response surface methodology were in accordance with the practical validation consequences. The good regeneration effect of SFB2‑900 manifested that this material had great practical application potential. Combining the experimental results and density functional theory calculation results, the adsorption mechanisms mainly included pore filling, π–π EDA interactions, electrostatic interactions, and H-bonds. The material could be regarded as a novel and high-efficiency adsorbent for antibiotics. Additionally, these findings also provide reference for the reuse of waste biomass in water treatment.

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Section: Resultsmentioning

confidence: 99%

Removal of Ciprofloxacin from Water by a Potassium Carbonate-Activated Sycamore Floc-Based Carbonaceous Adsorbent: Adsorption Behavior and Mechanism

Xue

Zhang

et al. 2023

Langmuir

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“…Molecules 2024, 29, x FOR PEER REVIEW 2 of 16 low flotation recovery rate of tungsten ore [8,9]. This is mainly due to the short carbon chain of the hydrophobic groups in traditional hydroxamic acids and weak molecular hydrophobic ability.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Aliphatic Hydroxamic Acid from Litsea cubeba Kernel Oil and Its Application to Flotation of Fe(III)-Activated Wolframite

Xiao,

Li,

Liu

et al. 2023

Molecules

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Litsea cubeba is a characteristic woody oil resource in Hunan. As a solid waste of woody oil resources, Litsea cubeba kernels are rich in Litsea cubeba kernel oil with a carbon chain length of C10–12 fatty acid. In this work, aliphatic hydroxamic acids (AHAs) with carbon chain lengths of C10–12 were prepared from Litsea cubeba kernel oil via methylation and hydroximation reactions. The adsorption and hydrophobicity mechanism of AHA towards wolframite was explored by contact angle, zeta potential, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The flotation results demonstrated that AHA was a superior collector than the traditional collector such as benzoyl hydroxamic acid (BHA). Zeta potential and contact angle results have shown that AHA was adsorbed on the surface of the Fe(III)-activated wolframite in its anionic form, which significantly improved the surface hydrophobicity of wolframite. FTIR and XPS revealed that AHA was chemically adsorbed on the surface of Fe(III)-activated wolframite in the form of a five-member ring, which made the hydrophobic chain reach into the solution, come in contact with bubbles, and achieve flotation separation.

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“…In size reduction units, using these GAs, such as PAA, makes it inevitable that these additives can directly or indirectly enter downstream separation processes, such as flotation. Froth flotation remains the most versatile separation technique, yet very complex, utilizing differences in natural or imparted wettability of the mineral surface [26][27][28][29]. In flotation, solution and surface chemistry are important in understanding the physicochemical processes occurring at the solid-water and the air-water interface [30,31].…”

Section: Introductionmentioning

confidence: 99%

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

Chipakwe

Karlkvist

Rosenkranz

et al. 2023

Separation and Purification Technology

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Application of a new amidoxime surfactant in flotation separation of scheelite and calcite: Adsorption mechanism and DFT calculation

Cited by 44 publications

References 54 publications

Removal of Ciprofloxacin from Water by a Potassium Carbonate-Activated Sycamore Floc-Based Carbonaceous Adsorbent: Adsorption Behavior and Mechanism

Removal of Ciprofloxacin from Water by a Potassium Carbonate-Activated Sycamore Floc-Based Carbonaceous Adsorbent: Adsorption Behavior and Mechanism

Preparation of Aliphatic Hydroxamic Acid from Litsea cubeba Kernel Oil and Its Application to Flotation of Fe(III)-Activated Wolframite

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

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