The Toxic Effects of Lindane via the Impact of pH and Dissolved Organic Matter on Microcystis aeruginosa

The toxic effects of Lindane (γ-BHC) on Microcystis aeruginosa were studied under lab culture conditions. Total protein levels, as well malondialdehyde (MDA) levels and superoxide dismutase (SOD) enzyme activity, in algal cells, determined after exposure to different concentrations Lindane. bioaccumulation Lindane, the influence pH dissolved organic matter (DOM) effects, was also evaluated cells. growth M. inhibited by treatment (96 h), resulting a 50% maximal effect (EC50) concentration 442 μg/L. In addition, lowest observed (LOEC) found be 120 μg/L; no (NOEC) 60 μg/L, maximum acceptable toxicant (MATC) 85 With increasing time, significantly inhibited; total SOD activity decreased. MDA concentration, however, showed an insignificant increase 96 h. has potential for cells with bioconcentration factor (BCF) 340. Furthermore, influenced environmental factors, such DOM. decreased humic acid concentrations. Ultrastructure cell images used depict Lindane-induced apoptosis.