Adsorption of Cobalt(II) from Aqueous Solutions by Fe3O4/Bentonite Nanocomposite

Hashemian, Saeedeh; Saffari, Hossein; Ragabion, Saeedeh

doi:10.1007/s11270-014-2212-6

Cited by 135 publications

(39 citation statements)

References 39 publications

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“…The model suggests a chemisorption process as a rate determining step, promoted by covalent forces through the electron exchange between the adsorbent and the adsorbate . Several studies on the metal ion adsorption also showed that experimental data were best fitted by the pseudo–second‐order kinetic model …”

Section: Resultsmentioning

confidence: 95%

Surface‐initiated atom transfer radical polymerization of a new rhodanine‐based monomer for rapid magnetic removal of Co(II) ions from aqueous solutions

Rahmaninia

Mansoori

Nasiri

2018

Polymers for Advanced Techs

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The present study reports synthesis and characterization of a new acrylamide‐based monomer containing rhodanine moiety, N‐3‐amino‐thiazolidine‐4‐one‐acrylamide (ATA). Poly(ATA)‐grafted magnetite nanoparticles (poly(ATA)‐g‐MNPs) were prepared using surface‐initiated atom transfer radical polymerization of the monomer on Fe3O4 nanoparticles. The grafted nanoparticles were characterized by Fourier transform infrared analysis, scanning electron microscopy, X‐ray diffraction, and vibrating sample magnetometry. The amount of the grafted polymer was 209 mg g−1, as calculated from thermogravimetric analysis experiment. The capability of poly(ATA)‐g‐MNPs to remove Co(II) cations was shown under optimal conditions of contact time, pH, adsorbent dosage, and initial Co(II) concentration. About 86% of the Co(II) cations were removed over 7 minutes. The adsorption kinetics obeyed the pseudo–second‐order kinetic equation, and the Langmuir isotherm model best described the adsorption isotherm with a maximum adsorption capacity of 3.62 mg g−1. The thermodynamic investigation showed spontaneous nature of the adsorption process (ΔG = −2.90 kJ mol−1 at 25°C ± 1°C). In addition, the poly(ATA)‐g‐MNPs were regenerated by simply washing with an aqueous 0.1M HCl solution. The study of the reusability of the prepared magnetic sorbent revealed that the sorbent can be reused without a significant decrease in the extraction efficiency and be recovered by 95.4% after 7 cycles. These findings suggest that the grafted nanoparticles are stable and reusable adsorbent and can be potentially applied to water treatment in efficient removal of Co(II) cations.

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Section: Resultsmentioning

confidence: 95%

Surface‐initiated atom transfer radical polymerization of a new rhodanine‐based monomer for rapid magnetic removal of Co(II) ions from aqueous solutions

Rahmaninia

Mansoori

Nasiri

2018

Polymers for Advanced Techs

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Section: Resultsmentioning

confidence: 95%

“…In addition, MNP‐supported adsorbents can easily and rapidly be collected from sample solutions by an external magnet. Although bare MNPs have been reported for metal ions removal, coating MNPs prior to any treatment is highly recommended in the literature . Strong magnetic dipole‐dipole interactions and high‐specific surface area of MNPs are origins of their intrinsic tendency for agglomeration.…”

Section: Introductionmentioning

confidence: 99%

New acrylamide‐based monomer containing metal chelating units: Homopolymer grafted magnetite nanoparticles via ATRP for the magnetic removal of Co(II) ions

Mirzaeinejad

Mansoori

Koohi‐Zargar

2017

Polymers for Advanced Techs

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In this research, we synthesized and characterized a new acrylamide‐based monomer containing pyridine and 1,3,4‐oxadiazole moieties, N‐(4‐(5‐(pyridin‐2‐yl)‐1,3,4‐oxadiazol‐2‐yl)phenyl)acrylamide (POPA). Poly(POPA)‐grafted magnetite nanoparticles were then obtained via surface‐initiated atom transfer radical polymerization. The grafted nanoparticles were characterized by Fourier transform infrared analysis, scanning electron microscopy, wide angle X‐ray diffraction, and vibrating sample magnetometry. The amount of the grafted polymer was 126 mg/g, as calculated from thermo gravimetric analysis experiment. The capability of poly(POPA)‐g‐magnetite nanoparticles (MNPs) to remove Co(II) cations, under optimal time period, pH and adsorbent mass, was shown by atomic absorption. The adsorption kinetics obeyed the pseudo–second‐order kinetic equation, and the adsorption isotherm was best described by the Freundlich model with a maximum adsorption capacity of 59.90 mg/g. In addition, the poly(POPA)‐g‐MNPs were regenerated by simply washing with an aqueous 0.1M HCl solution, and no considerable decrease was observed in the extraction efficiency following the test of up to 7 cycles. These findings suggest that poly(POPA)‐g‐MNPs are stable and reusable adsorbent, and they could be potentially applied to water treatments for an efficient removal of Co(II) cations.

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“…Kobalt gideriminde metal giderme yöntemleri arasında yer alan kimyasal çöktürme, adsorpsiyon, elektrokimyasal arıtım, iyon değiştirme gibi yöntemler uygulanmaktadır. Özellikle adsorpsiyon kobalt gideriminde sıklıkla kullanılan etkin ve ekonomik açıdan makul bir yöntemdir [6]. Bu yöntemin avantajı endüstriyel süreçlerden dolayı çevreye salınan atık çamurların veya doğal ortamda büyük oranlarda bulunan ham malzemelerin adsorbent olarak kullanılabilmesidir.…”

Section: Introductionunclassified

Application of response surface methodology for optimization of Co(II) adsorption conditions with natural pumice mineral

Şahan¹,

Yılmaz²

2017

Pamukkale J Eng Sci

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Pomza mineralleri ülkemizde bol miktarda bulunan ve farklı kullanım alanına sahip gözenekli bir malzemedir. Doğal pomza, boşluklu, süngerimsi, volkanik faaliyetler sonucunda oluşmuş, fiziksel ve kimyasal etkilere karşı dayanıklılığı yüksek, gözenekli camsı bir kayaçtır. Oluşum evresinde, yapısında bulunan gazların (flor, klor, su buharı gibi), hızlı bir şekilde yapıdan ayrılması ve aniden soğuması sebebiyle, sayısız gözeneği yapısında barındırır [11]. Doğal pomza, zararsız atık üretmemesi doğada ucuz ve bol olarak bulunması ve kolay elde edilebilir olması bakımından ağır metal adsorpsiyonu için çok

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Adsorption of Cobalt(II) from Aqueous Solutions by Fe3O4/Bentonite Nanocomposite

Cited by 135 publications

References 39 publications

Surface‐initiated atom transfer radical polymerization of a new rhodanine‐based monomer for rapid magnetic removal of Co(II) ions from aqueous solutions

Surface‐initiated atom transfer radical polymerization of a new rhodanine‐based monomer for rapid magnetic removal of Co(II) ions from aqueous solutions

New acrylamide‐based monomer containing metal chelating units: Homopolymer grafted magnetite nanoparticles via ATRP for the magnetic removal of Co(II) ions

Application of response surface methodology for optimization of Co(II) adsorption conditions with natural pumice mineral

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