ORIGINAL_ARTICLE
ADSORPTION OF REMAZOL BLACK RL AND REACTIVE YELLOW 145 FROM AQUEOUS SOLUTIONS BY PINE NEEDLES
Adsorption of Reactive Yellow 145 (RY145) and Remazol Black RL (RBRL) onto pineneedles (PN) was investigated with respect to initial dye concentrations, adsorbent dosage, and pHin a batch manner. The obtained data in the study were described according to the Langmuir andFreundlich isotherm models and the Langmuir model describes the experimental data very wellwith a qmax value of 13.831 and 7.225 for RBRL and RY145 respectively. As the pH decreased,adsorption density increased gradually and the highest adsorption density was obtained at pH 2 forboth adsorbents (91.57 and 64.77% for RBRL and RY145 respectively). Equilibrium adsorptionrates of 70.15% with RY145 and 86.72% with RBRL onto PN were observed at 90 min. In orderto better model the kinetics of adsorption, first order, pseudo second order and second ordermodels were applied. Among these models, the pseudo-second order kinetic model provided agood correlation for the adsorption of RY145 and RBRL by PN with a R2> 0.999. Results showedthat pine needles have great potential to remove Reactive Yellow 145 (RY145) and RemazolBlack RL from aqueous solutions.
https://ijstc.shirazu.ac.ir/article_1851_20caefe8413f879707681124210ef166.pdf
2014-02-01
147
155
10.22099/ijstc.2014.1851
Adsorption
reactive yellow 145
Remazol Black RL
pine needles