Abstract：
:Activated carbon (AC) prepared from waste Parthenium was used to eliminate Ni(lI) from aqueous solution by adsorption. Batch mode adsorption experiments are carried out, by varying contact time, metal ion concentration, carbon concentration, pH and desorption to assess kinetic and equilibrium parameters. They allowed initial adsorption coefficient, adsorption rate constant and maximum adsorption capacities to be computed. The adsorption data were modeled by using both Langmuir and Freundlich classical adsorption isotherms. The adsorption capacity (Q0) calculated from the Langmuir isotherm was 54.35 mg Ni(II)/g of AC at initial pH of 5.0 and 20 degrees C, for the particle size 250-500 microm. Increase in pH from 2 to 10 increased percent removal of metal ion. The regeneration by HCl of Ni(II)-saturated carbon by HCl, allowed suggestion of an adsorption mechanism by ion-exchange between metal ion and H+ ions on the AC surfaces. Quantitative recovery of Ni(II) was possible with HCl.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Kadirvelu K,Senthilkumar P,Thamaraiselvi K,Subburam Vdoi
10.1016/s0960-8524(01)00093-1subject
Has Abstractpub_date
2002-01-01 00:00:00pages
87-90issue
1eissn
0960-8524issn
1873-2976pii
S0960-8524(01)00093-1journal_volume
81pub_type
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