The sorption behavior of a nickel-insolubilized humic acid system in a column arrangement

Gezici, Orhan; Kara, Hüseyin; Ersöz, Mustafa; Abalı, Yüksel

doi:10.1016/j.jcis.2005.06.009

Cited by 50 publications

(46 citation statements)

References 9 publications

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“…It is seen that there is almost no adsorption between pH (1-2) range. In the literature [5,8] it is also emphasized that in aqueous media there is a competition between H 3 O + and metal ions toward the solid phase. At low pHs, the surface of the adsorbent is closely associated with the hydronium ions and repulsive forces limit the approach of the metal ions.…”

Section: Effect Of Ph Upon Cation Sorptionmentioning

confidence: 99%

“…However, the high solubility of humic acid is a limiting problem. Accordingly, an appropriate treatment of humic acid is required [5]. The process developed by Seki and Suzuki [6] is called "insolubilization of humic acid" and with this method humic acid can be converted to a form which is insoluble up to pH 10 in aqueous media.…”

Section: Introductionmentioning

confidence: 99%

“…Gezici et al [5] reported the sorption behavior of a nickel-insolubilized humic acid system in a column arrangement. In another study Baker and Khalili [8] examined the analysis of the removal of lead(II) from aqueous solutions by adsorption onto insolubilized humic acid.…”

Section: Introductionmentioning

confidence: 99%

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Sorption of radioactive cesium and barium ions onto solid humic acid

Celebi

Kilikli

Erten

2009

Journal of Hazardous Materials

104

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a b s t r a c tIn this study, the sorption behavior of two important fission product radionuclides ( 137 Cs and 140 Ba) onto sodium form of insolubilized humic acid (INaA) were investigated as a function of time, cation concentration and temperature, utilizing the radiotracer method. The sorption processes are well described by both Freundlich and Dubinin-Radushkevich type isotherms. Thermodynamic constants such as; free energy ( G ads ), enthalpy ( H ads ), entropy ( S ads ) of adsorption were determined. It was found that Ba 2+ was adsorbed five times more than Cs + onto structurally modified humic acid and kinetic studies indicated that adsorption behavior of both ions obey the pseudo second order rate law. The effect of pH change on sorption was also examined. FTIR and solid-state carbon NMR ( 13 CNMR) spectroscopic techniques were used to understand the structural changes during insolubilization process. Quantitative determination of adsorption sites was carried out using potantiometric titration.

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Section: Effect Of Ph Upon Cation Sorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sorption of radioactive cesium and barium ions onto solid humic acid

Celebi

Kilikli

Erten

2009

Journal of Hazardous Materials

104

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“…Humic acid is one of the main components of peat water that consisted of large molecules with molecular weights ranging from thousands to hundreds of thousands (Gezici et al 2005) and have a backbone of aromatic and aliphatic residues with numerous substituents such as OH groups, ketones, carboxylic acid groups, amino acids/peptides, saccharides, and amino saccharides (Albers et al 2008). Humic acid imparts a brown or yellow color in peat water and pose a serious environmental problem, particularly in drinking water treatment because of their taste and odor.…”

Section: Introductionmentioning

confidence: 99%

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Zulfikar

Novita²,

Hertadi

et al. 2013

Int. J. Environ. Sci. Technol.

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The main objective of this study is to investigate the possibility of powdered eggshell used as an adsorbent material for removal of humic acid from peat water. The influences of contact time, dose of eggshells, pH, and temperature were the factors considered in the removal processes of humic acid from peat water. In addition, adsorption isotherms of humic acid onto the powdered eggshell were also evaluated with the Langmuir and Freundlich approximations. Our results showed that the equilibrium of the process was eventually established after 60 min of the contact time, and also found that using 5 g of the powdered eggshell nearly 95 % of humic acid has been successfully removed from the peat water. The removal of humic acid gave better result when it was conducted at low pH, and it was almost unaffected the temperatures variation. The data was well fitted to Freundlich isotherm with the correlation coefficient of not \0.999, and could uptake the humic acid about 126.58 mg/g at pH 4.01, estimated from the Langmuir model. The kinetic experimental data proportionally correlated with the pseudo-second-order kinetic model with a rate constant in the range of 0.016-0.112 g mg -1 min -1 , while intra-particle-diffusion were the main rate determining step in the humic acid removal process. The powdered eggshell investigated in this study, thus, exhibited as a high potential adsorbent for the removal of humic acid from peat water.

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“…Environmental pollution caused by the discharge of untreated poisonous effluents is a major concern of 21 st century [1][2][3][4] . The industrial effluents cause serious environmental issues because of their adverse effects on the aquatic and terrestrial life as water eutrophication by these substances prevents the penetration of sunlight necessary for photosynthesis [5] .…”

Section: Introductionmentioning

confidence: 99%

The adsorptive potential of chicken egg shells for the removal of oxalic acid from wastewater

Ikram

Rehman

Ali

et al. 2016

JBEI

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Chicken egg shells were grinded and sieved to an exact particle size of 125 micron and treated with excess aqua regia and n-hexane to remove inorganic and organic impurities. Adsorption of oxalic acid from waste water was studied on treated powder egg shells by kinetics and batch adsorption techniques at different temperatures, 20ºC, 30ºC and 40ºC. The samples were characterized by BET surface area, scanning electron microscopy (SEM), and Fourier Transform Infra-red Spectroscopy (FTIR) and energy dispersive spectroscopy (EDS) techniques. The amount of acid adsorbed was determined with respect to initial acid concentration, equilibrium time and different acid concentration manually by titration method. Intra-particle diffusion, Elovich and Bhangam models were used for adsorption kinetics and thermodynamic parameters ΔH ≠ , ΔS ≠ and ΔE ≠ were calculated. The results obtained showed that adsorption process was spontaneous and entropy of adsorption had negative value. Freundlich, Langmuir, Tempkin and Harkins-Jura linear equations were used to investigate adsorption isotherms. This work will provide feasible routes for waste water treatment.

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The sorption behavior of a nickel-insolubilized humic acid system in a column arrangement

Cited by 50 publications

References 9 publications

Sorption of radioactive cesium and barium ions onto solid humic acid

Sorption of radioactive cesium and barium ions onto solid humic acid

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

The adsorptive potential of chicken egg shells for the removal of oxalic acid from wastewater

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