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Table 9

Seasonally variations in concentrations (μg L−1) of intracellular and extracellular microcystins (Mean ± standard error, n = 3) in raw and treated waters at Kafr El-Shinawy drinking-water treatment plant – Damietta

MicrocystinTreatmentSeason
WinterSpringSummerAutumn
Intracellular microcystin Raw 0.710 ± 0.0284d 0.980 ± 0.0392f 1.700 ± 0.0680g 0.880 ± 0.0352e 
Treated 0.009 ± 0.0003b 0.009 ± 0.0003b 0.011 ± 0.0003bc 0.003 ± 0.0001a 
Extracellular microcystin Raw 0.560 ± 0.0168a 0.680 ± 0.0340b 1.300 ± 0.0520f 0.740 ± 0.0518c 
Treated 1.210 ± 0.0242e 1.780 ± 0.0890g 2.010 ± 0.1005h 1.000 ± 0.0400d 
MicrocystinTreatmentSeason
WinterSpringSummerAutumn
Intracellular microcystin Raw 0.710 ± 0.0284d 0.980 ± 0.0392f 1.700 ± 0.0680g 0.880 ± 0.0352e 
Treated 0.009 ± 0.0003b 0.009 ± 0.0003b 0.011 ± 0.0003bc 0.003 ± 0.0001a 
Extracellular microcystin Raw 0.560 ± 0.0168a 0.680 ± 0.0340b 1.300 ± 0.0520f 0.740 ± 0.0518c 
Treated 1.210 ± 0.0242e 1.780 ± 0.0890g 2.010 ± 0.1005h 1.000 ± 0.0400d 

Values with different letters ‘a, b, c, d, e, f, …’ are significantly different at P < 0.05.

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