Microcystin-LR (MC-L) is among the most toxic and frequent cyanotoxins found in surface water and a provisional value of 0.001 mg/L is indicated by World Health Organization guidelines for water for human consumption. Among the conventional processes used for surface water treatment, the most effective in microcystin removal are chemical oxidation and adsorption. This study investigated two processes for the treatment of raw water of lake of Garda, drawn from the drinking water treatment plant of Desenzano d/G (Brescia, Italy), spiked with pure MC-LR. The experimental tests on adsorption with activated carbon were performed using carbon from both a mineral (M21) and a plant source (C25). Determination of the adsorption isotherm show that the activated carbon M21 is more effective than C25 in MC-LR removal. During the continuous flow column test with the carbon M21, the limit concentration for MC-LR was reached after about 4,000 bed volumes. Finally, chemical oxidation with sodium hypoclorite, which is more effective than chlorine dioxide for MC-LR removal, shows a yield of 80% with a concentration of 3 mgCl2/L with a consequent reduction of MC-LR concentration from 10 to 1.5–2 μg/L.
Skip Nav Destination
Article navigation
November 2011
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
November 01 2011
Microcystin-LR removal from drinking water supplies by chemical oxidation and activated carbon adsorption
S. Sorlini;
1Faculty of Engineering, Department of Civil Engineering, Architecture, Land and Environment, University of Brescia, Via Branze 43, 25123 Brescia, Italy
E-mail: [email protected]
Search for other works by this author on:
C. Collivignarelli
C. Collivignarelli
1Faculty of Engineering, Department of Civil Engineering, Architecture, Land and Environment, University of Brescia, Via Branze 43, 25123 Brescia, Italy
Search for other works by this author on:
Journal of Water Supply: Research and Technology-Aqua (2011) 60 (7): 403–411.
Article history
Received:
April 11 2011
Accepted:
July 15 2011
Citation
S. Sorlini, C. Collivignarelli; Microcystin-LR removal from drinking water supplies by chemical oxidation and activated carbon adsorption. Journal of Water Supply: Research and Technology-Aqua 1 November 2011; 60 (7): 403–411. doi: https://doi.org/10.2166/aqua.2011.029
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