In this work, an electrochemically assisted coagulation for the removal of chromium from water has been studied using zinc as anode and galvanized iron as cathode. The effects of pH, current density, concentration of chromium, temperature, adsorption kinetics and isotherms on the removal of chromium were investigated. The results showed that the optimum removal efficiency of 96.5% was achieved at a current density of 0.2 A/dm2, at a pH of 7.0. First- and second-order rate equations, Elovich and intraparticle diffusion models were applied to study adsorption kinetics. The adsorption process follows second-order kinetics model with good correlation. An equilibrium isotherm was measured experimentally and the results were analyzed by the Langmuir, Freundlich and Dubinin-Redushkevich model using linearized correlation co-efficient. The Langmuir adsorption isotherm was found to fit the equilibrium data for chromium adsorption. Temperature studies showed that the adsorption was endothermic and spontaneous in nature.
Skip Nav Destination
Article navigation
Research Article|
April 01 2011
Studies relating to an electrochemically assisted coagulation for the removal of chromium from water using zinc anode Available to Purchase
S. Vasudevan;
1CSIR, Central Electrochemical Research Institute, Karaikudi 630 006, India
E-mail: [email protected]
Search for other works by this author on:
J. Lakshmi
J. Lakshmi
1CSIR, Central Electrochemical Research Institute, Karaikudi 630 006, India
Search for other works by this author on:
Water Supply (2011) 11 (2): 142–150.
Article history
Received:
January 14 2011
Accepted:
February 28 2011
Citation
S. Vasudevan, J. Lakshmi; Studies relating to an electrochemically assisted coagulation for the removal of chromium from water using zinc anode. Water Supply 1 April 2011; 11 (2): 142–150. doi: https://doi.org/10.2166/ws.2011.032
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00