Adsorption of Co(II) and Ni(II) by EDTA- and/or DTPA-modified chitosan: Kinetic and equilibrium modeling

By E. Repo, J. Warchoł, Tonni Agustiono. Kurniawan, M. Sillanpää. 2010

431 citations recorded by the source corpus.

Abstract The aim of the present study was to investigate the adsorption properties of surface modified chitosans in the aqueous solutions containing Co(II) and/or Ni(II) ions. For this purpose, the ligands of ethylenediaminetetraacetic acid (EDTA) or diethylenetriaminepentaacetic acid (DTPA) were immobilized onto polymer matrices of chitosan. Adsorption of Co(II) and Ni(II) by prepared adsorbents was investigated in batch techniques. The effects of pH, functional group, contact time, and the concentration of metals were studied. Metal uptake by EDTA-chitosan was 63.0 mg g −1 for Co(II) and 71.0 mg g −1 for Ni(II) and by DTPA-chitosan 49.1 mg g −1 for Co(II) and 53.1 mg g −1 for Ni(II). The adsorption efficiency of studied adsorbents ranged from 93.6% to 99.5% from 100 mg L −1 Co(II) and/or Ni(II) solution, when the adsorbent dose was 2 g L −1 and solution pH 2.1. The kinetics of Co(II) and Ni(II) on both of the modified chitosans followed the pseudo-second-order model but the adsorption rate was also influenced by intraparticle diffusion. The equilibrium data was best described by the Sips isotherm and its extended form was also well fitted to the two-component data obtained for systems containing different ratios of Co(II) and Ni(II). Nevertheless, the obtained modeling results indicated relatively homogenous system for Co(II) and heterogeneous system for Ni(II) adsorption.

Subfields: Industrial and Manufacturing Engineering, Mechanical Engineering, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/047146ca9009e6bdf60a1fac6b3487b956fe0388

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Industrial and Manufacturing Engineering

1. S. Zhuang
2. Jianlong Wang
3. Sanna Hokkanen
4. M. Sillanpää
5. Geoffrey M. Gadd

In Mechanical Engineering

1. Sanna Hokkanen
2. M. Sillanpää
3. Jianlong Wang
4. S. Zhuang

In Water Science and Technology

1. S. Zhuang
2. Jianlong Wang
3. E. Repo
4. Sanna Hokkanen
5. S. Nethaji
6. Asit Baran Mandal
7. A. Sivasamy
8. M. Sillanpää

Citations in the corpus

• Removal of various pollutants from water and wastewater by modified chitosan adsorbents (2017, background): “EDTA- and DTPA-functionalized chitosan can be synthesized through the reaction between anhydride of EDTA or DTPA and amino groups of chitosan (Ge and Huang, 2010; Repo et al., 2010, 2011, 2013).”
• Adsorption of Ni(II), Cu(II) and Cd(II) from aqueous solutions by amino modified nanostructured microfibrillated cellulose (2014, background): “For example, natural bentonite (Babel and Kurniawan 2003), orange peel (Ajmal et al. 2000), chitosan (Repo et al. 2010; Bhatnagar and Sillanpää 2009; Guibal 2004), anaerobic granular sludge (van Hullebusch et al. 2005; Virkutyte et al. 2005) and activated carbon (Bhatnagar and Sillanpää 2010)…”
• Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass (2013, background): “This underground water is being polluted by the wastewater containing a large number of contaminants like acids, bases, toxic organics, inorganics, heavy metals (Repo et al. 2010), dissolved solids and colors disposed by leather and textile industries.”