Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Metakaolin based geopolymer as an effective adsorbent for adsorption of zinc(II) and nickel(II) ions from aqueous solutions
AbstractMetakaolin based geopolymer (MKG) was investigated as an adsorbent to remove Zn(II) and Ni(II) ions from aqueous solution. The parameters of initial pH, adsorbent amount, time of contact and initial metal ion concentration on the metal removal performance of MKG were studied using a batch method at 25°C. The amount of Zn(II) and Ni(II) ions adsorbed onto MKG increased with increasing contact time with an adsorption equilibrium being reached within 40min and 50min for Zn(II) and Ni(II), respectively. The optimum values of initial pH were 6.39 for Zn(II) and 7.25 for Ni(II). The uptake of Zn(II) and Ni(II) ions by MKG was observed to decrease by increasing the adsorbent amount. The Langmuir isotherm described the adsorption data very well and the maximum monolayer adsorption capacities determined from the Langmuir adsorption isotherm were found to be 1.14×10−3 and 7.26×10−4molg−1 for Zn(II) and Ni(II), respectively. The kinetic studies showed that adsorption followed the pseudo-second-order kinetic model. The continuous mode adsorption studies showed the optimum flow rates were 2.0mLmin−1 for Zn(II) and 1.0mLmin−1 for Ni(II). The breakthrough points were observed at 150 and 280min for Zn(II) and Ni(II), respectively. It is concluded that Zn(II) and Ni(II) ions in aqueous solutions are efficiently removed by MKG which could be employed as a low-cost and excellent alternative for wastewater treatment.
HighlightsMKG displayed excellent good adsorption performance for Zn(II) and Ni(II).Adsorption of Zn(II) and Ni(II) well fitted by the pseudo-second-order kinetics.Adsorption of Zn(II) and Ni(II) takes place on the homogeneous surface of MKG.MKG effectively removed Zn(II) and Ni(II) in continuous system.
Metakaolin based geopolymer as an effective adsorbent for adsorption of zinc(II) and nickel(II) ions from aqueous solutions
AbstractMetakaolin based geopolymer (MKG) was investigated as an adsorbent to remove Zn(II) and Ni(II) ions from aqueous solution. The parameters of initial pH, adsorbent amount, time of contact and initial metal ion concentration on the metal removal performance of MKG were studied using a batch method at 25°C. The amount of Zn(II) and Ni(II) ions adsorbed onto MKG increased with increasing contact time with an adsorption equilibrium being reached within 40min and 50min for Zn(II) and Ni(II), respectively. The optimum values of initial pH were 6.39 for Zn(II) and 7.25 for Ni(II). The uptake of Zn(II) and Ni(II) ions by MKG was observed to decrease by increasing the adsorbent amount. The Langmuir isotherm described the adsorption data very well and the maximum monolayer adsorption capacities determined from the Langmuir adsorption isotherm were found to be 1.14×10−3 and 7.26×10−4molg−1 for Zn(II) and Ni(II), respectively. The kinetic studies showed that adsorption followed the pseudo-second-order kinetic model. The continuous mode adsorption studies showed the optimum flow rates were 2.0mLmin−1 for Zn(II) and 1.0mLmin−1 for Ni(II). The breakthrough points were observed at 150 and 280min for Zn(II) and Ni(II), respectively. It is concluded that Zn(II) and Ni(II) ions in aqueous solutions are efficiently removed by MKG which could be employed as a low-cost and excellent alternative for wastewater treatment.
HighlightsMKG displayed excellent good adsorption performance for Zn(II) and Ni(II).Adsorption of Zn(II) and Ni(II) well fitted by the pseudo-second-order kinetics.Adsorption of Zn(II) and Ni(II) takes place on the homogeneous surface of MKG.MKG effectively removed Zn(II) and Ni(II) in continuous system.
Metakaolin based geopolymer as an effective adsorbent for adsorption of zinc(II) and nickel(II) ions from aqueous solutions
Kara, İlknur (Autor:in) / Yilmazer, Dilek (Autor:in) / Akar, Sibel Tunali (Autor:in)
Applied Clay Science ; 139 ; 54-63
06.01.2017
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| DOAJ | 2022
The heavy metal adsorption characteristics on metakaolin-based geopolymer
| Online Contents | 2012
Antibacterial Metakaolin-Based Geopolymer Cement
| Springer Verlag | 2017