Adsorption of phosphate from aqueous solutions using calcined waste eggshell

Köse, T. Ennil; Kıvanç, Betül

doi:10.1016/j.cej.2011.09.129

Cited by 158 publications

(77 citation statements)

References 24 publications

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“…These results show that although the enhancing effects of temperature on humic acid adsorption are not significant, the inhibition effects of the higher temperatures are significant and should be considered as an operational parameter in economical aspect. This observation was similar to other researches reported (Kose and Kivanc 2011). The similarity of these results may be related to adsorbent Fig.…”

Section: Effect Of Temperaturesupporting

confidence: 82%

“…This may mean that powdered egg shell have more heterogenous types of adsorption sites (Oke et al 2008). This result was similar to other researches reported using eggshell as adsorbent for various adsorbate (Tsai et al 2006;Kose and Kivanc 2011;Ehrampoush et al 2011;Oke et al 2008). High value of n indicates a strong bond between the adsorbent and the adsorbate.…”

Section: Adsorption Isothermssupporting

confidence: 80%

“…This value is greater than that obtained by Tsai et al (2006), but smaller than that obtained by Kose and Kivanc (2011). Figure 4 shows the effect of contact time on humic acid removal from peat water on powdered eggshell for different dosages.…”

Section: Characterization Of Powdered Eggshellsmentioning

confidence: 62%

“…The pseudo-second-order model is based on the assumption that the rate-limiting step may be chemical sorption or chemisorption involving valence forces through sharing or exchange of electrons between sorbent and sorbate. It is assumed that the sorption capacity is proportional to the number of active sites occupied on the sorbent, then the kinetic rate law can be written as follows (Kamari et al 2009;Ngah et al 2011;Tao et al 2010;Wang et al 2011;Zhang and Bai 2003;Bhaumik et al 2012;Elwakeel and Yousif 2010;Gupta and Rastogi 2008;Gupta et al 2010;Kose and Kivanc 2011;Ehrampoush et al 2011;Chen et al 2010;Ugurlu et al 2005;Okoye et al 2010;Wang et al 2008b;Elkady et al 2011):…”

Section: Adsorption Kineticmentioning

confidence: 99%

“…The pseudo-first-order rate expression was evaluated with the following equation (Kamari et al 2009;Ngah et al 2011;Tao et al 2010;Wang et al 2011;Zhang and Bai 2003;Bhaumik et al 2012;Elwakeel and Yousif 2010;Rastogi 2008, Gupta et al 2010;Kose and Kivanc 2011;Ehrampoush et al 2011;Chen et al 2010;Ugurlu et al 2005;Okoye et al 2010;Wang et al 2008b;Elkady et al 2011): log ðq e À q t Þ ¼ log q e À k=2:303:t ð6Þ…”

Section: Adsorption Kineticmentioning

confidence: 99%

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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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Section: Effect Of Temperaturesupporting

confidence: 82%

Section: Adsorption Isothermssupporting

confidence: 80%

Section: Characterization Of Powdered Eggshellsmentioning

confidence: 62%

Section: Adsorption Kineticmentioning

confidence: 99%

Section: Adsorption Kineticmentioning

confidence: 99%

See 3 more Smart Citations

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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Removal and Recovery of Nutrients Using Low‐Cost Adsorbents from Single‐Component and Multicomponent Adsorption Systems

Manjunath

Kumar

2021

Sustainable Resource Management, Volume I

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Preparation of Tetraethylenepentamine‐Functionalized 4A Zeolite for effective removal of phosphate in water

Guan

Deng

Zhang

et al. 2020

Applied Organom Chemis

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Recently, the high‐concentration phosphorus‐containing wastewater has been caused lots of negative influences on aquatic environment and thus driven people to develop some effective methods to remove excess of phosphate in water. In order to solve these environmental problem, in this work, a tetraethylenepentamine (TEPA) modified 4A zeolite has been prepared and used for removing phosphate. Removal of phosphate by precipitation of 4A zeolite and electrostatic action of TEPA with phosphate were determined by scanning electron microscopy, X‐ray powder diffraction and Fourier infrared spectrum, and morphology and characteristic peak of TEPA‐4A zeolite before and after adsorption changed significantly. In addition, the results of batch adsorption studies showed that the pH of the solution have a significant influence on the adsorption of TEPA‐4A and the biggest adsorption capacity was 23 mg/g at pH = 2.3 ± 0.2. Adsorption isotherms results showed that the process was consistent with Langmuir model and the maximum adsorption capacity could reach to 28 mg/g at 25 °C. TEPA‐4A adsorption processes were spontaneous endothermic reaction, and elevated temperatures were conducive to the adsorption process through kinetics and thermodynamics results. The research of TEPA modified 4A zeolite and raw 4A zeolite provides technical support for the development of 4A zeolite instead of sodium tripolyphosphate as a new type of detergent ingredient.

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Adsorption of phosphate from aqueous solutions using calcined waste eggshell

Cited by 158 publications

References 24 publications

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

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

Removal and Recovery of Nutrients Using Low‐Cost Adsorbents from Single‐Component and Multicomponent Adsorption Systems

Preparation of Tetraethylenepentamine‐Functionalized 4A Zeolite for effective removal of phosphate in water

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