Removal of microcystin-LR from spiked water using either activated carbon or anthracite as filter material.
The occurrence of cyanobacterial toxins (blue-green algae) in drinking water sources is a big concern for human health. Removal of microcystin-LR (MC-LR) from drinking water was evaluated at the laboratory pilot scale using either granular activated carbon (GAC) or powdered activated carbon (PAC) and compared with the treatment using anthracite as filter material. Virgin GAC was more effective at removing MC-LR (initial concentration ranging from 9 to 47 microg L(-1)) to reach the World Health Organization recommended level (1.0 microg L(-1)). When the GAC filter was colonized by bacteria, the filter became less effective at removing MC-LR owing to competitive reactions occurring between protein adsorption (released by bacteria) and MC-LR adsorption. Using PAC, the concentration of MC-LR decreased from 22 to 3 microg L(-1) (removal of 86% of MC-LR) by the addition of 100 mg PAC L(-1).
Institut national de la recherche scientifique (INRS-Eau Terre et Environnement), Université du Quebec, 490 rue de la Couronne, Quebec, Qc, Canada, G1K 9A9. patrick.drogui@ete.inrs.ca
Patrick
P
Drogui
Rimeh
R
Daghrir
Marie-Christine
MC
Simard
Christine
C
Sauvageau
Jean François
JF
Blais
D001427:Bacterial Toxins / Q000737:chemistry / Q000302:isolation & purification*; D002606:Charcoal / Q000737:chemistry*; D003031:Coal; D008387:Marine Toxins; D052998:Microcystins / Q000737:chemistry / Q000302:isolation & purification*; D014462:Ultrafiltration / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation*
D001427:Bacterial Toxins; D003031:Coal; D008387:Marine Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; D014867:Water; D002606:Charcoal; C057862:cyanoginosin LR