Recovery and Preconcentration of Phenols from Aqueous Solutions with a Magnetic Sorbent Based on Fe3O4 Nanoparticles and Hyper-Cross-Linked Polystyrene

Gubin, A. S.; Sukhanov, P. T.; Кушнир, А. А.; Proskuryakova, E. D.

doi:10.1134/s1070427218100099

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…The IR spectra of all polymers (Supporting information Fig. S7) display a band at about 570 cm −1 typical of Fe 3 O 4 [41]. The IR spectrum of chloromethylated PS shows bands at 670 and 1265 cm −1 , which correspond to the C-Cl bond vibrations; after the reaction with amines and imidazole derivatives, the band intensity decreased significantly [40].…”

Section: Characterization Of Fe 3 O 4 /Hcpnhmentioning

confidence: 99%

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Gubin

Sukhanov

Кушнир

et al. 2021

J of Separation Science

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An efficient sorbent for magnetic solid-phase extraction was developed from Fe 3 O 4 nanoparticles covered with aminated hypercrosslinked polystyrene. The sorbent has a saturation magnetization of 47 emu/g and a surface area of 509 mg/g and was tested for the extraction of 11 phenols from aqueous media. The optimum conditions were as follows: pH 3; adsorbent mass, 20.0 mg; adsorption time, 30 min; eluent (acetone) volume, 0.5 mL; and desorption time, 5 min. The enrichment factor after desorption reached 1595-1716 and the maximum adsorption capacity was 501-909 mg/g. Capillary electrophoresis was applied successively to separate 11 phenols after solid-phase extraction. The best separation was achieved using a fused silica capillary and borate buffer (pH 10.7) as a supporting electrolyte. After optimization, the linearity range was from 0.2 to 950 μg/L, and the limits of detection were 0.05-0.2 μg/L. The relative standard deviation varied from 6.1 to 8.7% (C = 1 μg/L) and from 2.9 to 3.5% (C = 500 μg/L). The determination of phenols is complicated in eutrophic water and spring water with a high content of humic and fulvic acids.

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Section: Characterization Of Fe 3 O 4 /Hcpnhmentioning

confidence: 99%

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Gubin

Sukhanov

Кушнир

et al. 2021

J of Separation Science

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“…Приборы, реактивы и материалы. Для синтеза сорбентов применялись приборы, материалы и реактивы, аналогичные работе [20]. Идентификацию функциональных групп выполняли методом ИКспектрометрии (ИК Фурье-спектрометр ИнфраЛЮМ ФТ-08, приставка HATR PIKE Technologies™).…”

Section: экспериментальная частьunclassified

Сорбционное Концентрирование Фенолов Из Водных Сред Магнитными Молекулярно Импринтированными Полимерами На Основе N-Винилпирролидона

Губин¹,

Кушнир²,

Sukhanov³

2021

sorpchrom

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Фенолы одна из наиболее обширных групп приоритетных органических загрязнителей с мутагенными и канцерогенными свойствами. Они характеризуются очень низкими предельно допустимыми концентрациями, которые сложно определить многими современными физико-химическими методами без предварительного концентрирования. Решение этой задачи достигается современными подходами твердофазного концентрирования, в частности, применением молекулярно импринтированных полимерных сорбентов с магнитными свойствами. Изучена возможность получения магнитного сорбента на основе молекулярно импринтированного полимера (МИП), где в качестве функционального мономера применен N-винилпирролидон, сшивающий агент – этиленгликольдиметакрилат, а в качестве темплатов использованы фенолы. Синтезированы девять МИП с отпечатками 2-хлорфенола, 4-хлорфенола, 2-нитрофенола, 4-нитрофенола, бисфенола А, п-трет-бутилфенола, нонилфенола, трет-нонилфенола, 4-октилфенола и полимера без молекулярных отпечатков. Размер частиц полученных полимеров около 100 нм, намагниченность насыщения 51-53 emu/g. Наибольшие импринтинг-факторы (IF) достигнуты для МИП с отпечатками 4-нитрофенола (IF=3.8) и бисфенола А (IF=7.1), наименьшие – с отпечатками хлорфенолов (IF=1.1). Установлено, что наиболее эффективно фенолы сорбируются при рН 3. Наибольшие значения коэффициентов селективности достигаются при сорбции на МИП-4НФ и МИП-БФА. Степени извлечения фенолов МИП составили от 69 до 96%, для 2-НФ не более 45%, на неимпринтированном полимере эффективность извлечения для большинства фенолов существенно ниже.

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“…As we all know, both iron concentrate (Fe 3 O 4 ) and sponge iron (Fe) have some magnetic properties; therefore, magnetic separation is an effective way to recover iron where Fe 3 O 4 and Fe are used for iron smelting and steel making [8][9][10][11], respectively. Currently, the recovery of Fe 3 O 4 and Fe was studied by many researchers using magnetic separation from various metal dressing tailings or other solid wastes rich in iron [12][13][14]. However, not all iron with a certain phase in tailings and solid wastes are Fe 3 O 4 or Fe.…”

Section: Introductionmentioning

confidence: 99%

Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation

2021

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To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

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Recovery and Preconcentration of Phenols from Aqueous Solutions with a Magnetic Sorbent Based on Fe3O4 Nanoparticles and Hyper-Cross-Linked Polystyrene

Cited by 10 publications

References 17 publications

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Сорбционное Концентрирование Фенолов Из Водных Сред Магнитными Молекулярно Импринтированными Полимерами На Основе N-Винилпирролидона

Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation

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Recovery and Preconcentration of Phenols from Aqueous Solutions with a Magnetic Sorbent Based on Fe3O4 Nanoparticles and Hyper-Cross-Linked Polystyrene

Cited by 10 publications

References 17 publications

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

Сорбционное Концентрирование Фенолов Из Водных Сред Магнитными Молекулярно Импринтированными Полимерами На Основе N-Винилпирролидона

Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

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Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation