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The acid treated diatomite (ATD) was used to adsorb methylene blue from aqueous solutions. The equilibrium data were fitted to different adsorption isotherms and the best fit was obtained using Langmuir isotherm with R2 value of about unity. The maximum loading capacity, Qmax was found 126. ...
Desalination 217 (2007)
... were performed using different pretreated activated sludge as bioadsorbent for Cu2+, Cd and Ni2+. Pretreatment with NaOH was found to improve the adsorption capacity of the sludge where as treatment with HCl reduces it. The treated and untreated sludge show great affinity towards Cu2+, Cd2+ and low... reaches 94% in the first cycle and decreases to 8% in the 4th cycle after collecting 20,700 mg Cd2+/l H2SO4. 2+ Keywords: Biosorption; Adsorption isotherms; Activated sludge; Heavy metal; Industrial wastewater; Langmuir model; Freundlich model 0011-9164/06/$– See front matter © 2006 Elsevier B.V.
Desalination 196 (2006)
The objective of this study was to investigate the ability of natural phosphate (NP) to remove textile dyes from aqueous solutions. The adsorption of methylene blue (MB) as a reference molecule for the adsorption studies of organic molecules, basic yellow 28 (BY 28) and reactive yellow 125 ... were analysed using the pseudo-first order kinetics of Lagergren and the pseudo second order model to determine adsorption rate constants. The isotherms of adsorption data were analyzed by various adsorption isotherm models. The adsorption was temperature- and pH-dependent with a high adsorption ...
Desalination 235 (2009)