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Kinetics and adsorption studies of lead (II) onto activated carbon using low cost adsorbents

Paper Topic: 
Water and Wastewater Treatment
 

Pages :
-

Corresponing Author: 
daniel kibami
 
Authors: 
Daniel Kibami
Paper ID: 
gnest_02532
Paper Status: 
In press
Date Paper Accepted: 
07/05/2018
Paper online: 
02/08/2018
Abstract: 

The removal of Lead (II) from aqueous solutions using Fagopyrum esculentum Moench (Buckwheat) and Bambusa vulgaris (common bamboo) as adsorbents was investigated. The effects of various experimental parameters such as initial concentration, contact time and pH have been studied using batch adsorption technique. All the Adsorption isotherm models fitted well with the adsorption data. However, Freundlich isotherm displayed a better fitting model than the other two isotherm models due to high correlation coefficient (R2). This indicates the applicability of multilayer coverage of the Pb (II) on the surface of adsorbent. The adsorption kinetics was studied using four simplified models and it was found to follow the pseudo-second-order kinetic model which confirmed the applicability of the model. The adsorption mechanism was found to be chemisorption and the rate-limiting step was mainly surface adsorption.

Keywords: 
Lead; Batch method; Adsorption; Multilayer