Characteristics of Intracellular and Extracellular Organic Components of Microcystic Aeruginosa and Their Byproducts Formation Potential During Chlorination

Abstract:

Characteristics of the intracellular and extracellular organic components (desolved organic carbon (DOC),desolved organic nitrogenous (DON),the algae toxin,βcyclocitral,molecular weight distribution and hydrophilichydrophobic property) have been investigated.The result indicates that the amount of intracellular organic material is 3~10 times higher than that of the extracellular materia.And the intracellular organic matter mainly has 3 parts:less than 1 kD (chlorophyll,renieratene,algae toxin,smell material and so on),40~800 kD (phycocyanin),more than 800 kD (ribosome,starch and so on).The molecular weight of extracellular organic matter mainly concentrates within 1~200 kD (approximately 90%).In addition,the main intracellular and extracellular organic components are both the neutral hydrophilic substances,the percentage of which are 83% and 57%,respectively;The chloroform,chloroacetic formation potential of the intracellular and extracellular organic components are 10.4 μg·mg-1,15.5 μg·mg-1 and 57.10 μg·mg-1and 49.94 μg·mg-1.Moreover,the proportion of DON and TOC is 1/7,3 times higher than common water source,which may increase the formation of chlorination byproduct nitrosamine.

Key words:microcystic aeruginosa; intracellularextracellular; hydrophilichydrophobic property; chlorination byproducts; molecular weight distribution