Abstract：
:Adsorption properties of Co2+, Ni2+, and Cr3+ on an Amberlite IRN-77 cation exchange resin were investigated in batch systems. Levels of adsorption rapidly approached an equilibrium state within 1 h. The adsorption characteristics of each metal onto the resin were accurately represented by Langmuir isotherms. Co2+ and Ni2+, which have an equivalent electrovalence, displayed similar levels of adsorption onto the resin when they coexisted in the solution. However, when Cr3+ was added to the solution it competitively replaced Co2+ and Ni2+ ions that had been previously adsorbed onto the resin, resulting in the desorption of these metals into the solution. The result was likely due to a higher adsorption affinity of Cr3+ relative to Co2+ and Ni2+. This implies that interactively competitive adsorption of multi-cations onto the resin should be thoroughly considered when contemplating the efficient operation of an ion exchange process in the treatment of industrial wastewater.
journal_name
Chemospherejournal_title
Chemosphereauthors
Kang SY,Lee JU,Moon SH,Kim KWdoi
10.1016/j.chemosphere.2004.02.004subject
Has Abstractpub_date
2004-07-01 00:00:00pages
141-7issue
2eissn
0045-6535issn
1879-1298pii
S0045-6535(04)00093-1journal_volume
56pub_type
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