TREATMENT OF THE CYANOTOXIN ANATOXIN-A VIA ACTIVATED CARBON ADSORPTION

摘要

Six powdered and activated carbons were investigated for their adsorption of anatoxin-a, arnpotent cyanobacterial neurotoxin. The selected carbons included a range of porosities andrnsource materials (wood, coconut, coal) to provide a representative sample of the availablerncarbon products. Kinetic and isotherm studies in high purity water indicate that the morernmacroporous wood-based carbons have quicker uptake of anatoxin-a than the morernmicroporous coal and coconut-based carbons, while the more microporous carbons exhibitrngreater capacity at equilibrium. The effective size of the media is also shown to be anrnimportant parameter in determination of kinetic behaviour, with the smaller powderedrnactivated carbon far outperforming the larger granular carbons, a trend that also holds truernwith the smaller and larger grain sizes of the two coal-based granular carbons.