Journal
DESALINATION AND WATER TREATMENT
Volume 51, Issue 7-9, Pages 1989-1997Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2012.714896
Keywords
Biosorption; Nickel; Lignin; Modification; Tithonia diversifolia; Isotherm
Categories
Ask authors/readers for more resources
Adsorption capacity for the removal of nickel (II) ions from aqueous solution using unmodified and modified lignin extracted from Tithonia diversifolia was investigated. The lignin was characterized with FT-IR. Parameters like initial pH, initial concentration, and contact time were investigated. The optimum pH for metal removal was found to be 7, while optimum contact time of 360 min was achieved. The modification of the adsorbent by phenol affected the adsorption capacity. The kinetic studies showed that the sorption rates could be described by both pseudo-second-order and intraparticle diffusion models. The pseudo-second-order model showed a better fit with a correlation coefficient of 0.9955 and 0.9958 for both unmodified and modified lignins, respectively. The adsorption isotherm was best fitted using the Freundlich model. The adsorption capacity for Ni(II) on the unmodified and modified lignin was found to be 12.48 and 16.94 mg g(-1), respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available