Investigating sorption characteristics of copper ions onto insolubilized humic acid by using a continuously monitored solid phase extraction technique

Gezici, Orhan; Kara, Hüseyin; Yanık, Sema; Ayyıldız, Hamide Filiz; Küçükkolbaşı, Semahat

doi:10.1016/j.colsurfa.2006.12.007

Cited by 34 publications

(20 citation statements)

References 24 publications

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“…The higher sorption affinity of surface bonded fraction (k L,1 ) than that of ion exchanged fraction (k L,2 ) of Cu 2+ on a given HA fraction could be attributed to the stronger attraction and higher sorption energy occurred in surface complexation process than that in ion exchange process, consistent with previous results (Tipping, 2002;Bradl, 2004;Jiang et al, 2005). The smaller sorption capacity of surface bonded fraction (q m,1 ) than that of ion exchanged fraction (q m,2 ) could be attributed to the less sorption sites available on a given HA fraction for Cu 2+ sorption through surface complexation, compared with the sites available for Cu 2+ sorption through ion exchange (Gezici et al, 2007a(Gezici et al, , 2007b. Sorption capacity of the surface bonded fraction (q m,1 ) and the ion exchanged fraction (q m,2 ) at a given pH decreased with increasing extraction, and were both in an order of HAA > HAB > HAC > HAD (Table 2).…”

Section: Isotherms Of Cu 2+ On Ha Fractionssupporting

confidence: 87%

“…S4) and the larger values of q m,1 and q m,2 at pH 4.0 than that at pH 2.0 (Table 2) suggested that the carboxyl groups should be the predominant functional groups of the HA fractions responsible for Cu 2+ sorption through both surface complexation and ion exchange, consistent with previous studies (Biglke et al, 2010;El-Eswed and Khalili, 2006;Rovira et al, 2010). Solution pH could change the heavy metal species and the HA structures (Liu and Gonzalez, 2000;Gezici et al, 2007a;Yang et al, 2011), both of which control the sorption of heavy metal ions on HAs. At pH in the range from 1.5 to 4.5, divalent copper exists predominantly as Cu 2+ species in water (Li et al, 2012;Yang et al, 2014).…”

Section: The Role Of Functional Groups Of Ha Fractions In Sorption Ofmentioning

confidence: 99%

“…It was widely acknowledged that sorption of heavy metal ions on HAs was complicated due to the diverse properties of HAs (e.g., chemical compositions, functional groups and structures) (Gondar et al, 2006;Fujii et al, 2014) and the varied environmental conditions (e.g., temperature, pH and ionic strength) (Baker and Khalili, 2004;Gezici et al, 2007a;Xiong et al, 2013). Sorption capacity of heavy metal ions on HAs depended on the acidic functional groups of HAs, especially the carboxyl groups (Hernandez et al, 2006;Plaza et al, 2006;Calvino et al, 2010).…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Yang

Miao

et al. 2015

Chemosphere

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Section: Isotherms Of Cu 2+ On Ha Fractionssupporting

confidence: 87%

Section: The Role Of Functional Groups Of Ha Fractions In Sorption Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Yang

Miao

et al. 2015

Chemosphere

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“…SEM images were taken with ×2000 magnification. The increase in the size of pores is observed on the surface of the particles [6,7]. Heavy elements are sorbed mainly in pores; the change in Stretching vibrations are determined between the ranges of 225 to 4000 cm -1 .…”

Section: Characterization Of Complexesmentioning

confidence: 95%

Removability Efficiency of Heavy Metals with Modified Humate from Aqueous Media

Taubayeva¹,

Dzhusipbekov²,

Nurgalieva³

et al. 2014

Eur Chem Tech J

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The main aim of this work was to study the possibility of using amine-modified humate as a sorbent for the purification of water from heavy metal ions (Cu&Co). One of the effective methods of creating new sorbents of humic acids is chemical modification based on the high reactivity of the functional groups in the composition of humic acids. The possibility of modification of humic acid with bis(3-aminopropyl) amine was illustrated. Modification was carried out with the aim of increasing its sorption capacity. Metalhumate complexes were also obtained by an ion-exchange procedure with modified humate (Mod-Hum) by employing metal salts such as Cu(CH 3 COO) 2 ·H 2 O, Co(CH 3 COO) 2 ·4H 2 O. Maximum sorption percentages of Mod-Hum achieved were about 99.2% for Cu (II) and 90% for Co (II). The sorption degree depending on pH changes was studied in the range of 2 to 8, the sorption ability of the sorbents was stated to increase with the increase in pH. The degree of sorption of copper (ІІ) on Mod-Hum in the studied range of рН 5 was higher and of cobalt (II) for which the sorption is optimal at higher values (рН 7-8). It is stated that sorption degree increases with the increase in time from 15 min to 2 h. The adsorption of toxic metal ions with Mod-Hum was measured by atomic absorption spectroscopy (AAS). The experimental results on determination of the adsorption isotherm were evaluated with the Langmuir equation. It is shown that the sorbent develops a high sorption capacity in regard to ions of Cu (18.42 mg/g) and Со (16.25 mg/g). All the obtained complex compounds were analyzed and characterized by FT infrared spectroscopy (FTIR), scanning electron microscopy (SEM).

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“…A number of investigations have been carried out upon the sorption behavior of insolubilized humic acid to cations such as nickel, cesium, barium, copper etc. [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Sorption of phenol and radioactive cesium onto surfactant modified insolubilized humic acid

Celebi

Erten

2010

J Radioanal Nucl Chem

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In this study, the sorption behavior of two important contaminants, phenol and radioactive cesium ( 137 Cs), onto surfactant modified insolubilized humic acid (SMIA) were investigated as a function of time, sorbate concentration utilizing the radiotracer method and UV-Vis spectroscopy. Phenol sorption process was well described by both Freundlich and Tempkin type isotherms, and cesium sorption was described by Freundlich and DubininRadushkevich isotherms. It was found that SMIA adsorbs both cations and phenolic substances. Kinetic studies indicated that adsorption behavior of phenol obey the pseudo second order rate law. FTIR spectroscopic technique was used to understand the structural changes during modification process with surfactants.

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Investigating sorption characteristics of copper ions onto insolubilized humic acid by using a continuously monitored solid phase extraction technique

Cited by 34 publications

References 24 publications

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Removability Efficiency of Heavy Metals with Modified Humate from Aqueous Media

Sorption of phenol and radioactive cesium onto surfactant modified insolubilized humic acid

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