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The effects of Pseudokirchneriella subcapitata exudates on the acute toxicity of metals (Cd, Cu, Pb and Zn) were studied using (1h) algal photosynthesis inhibition tests. The metal concentrations tested were 30, 60, 120, 250 and 500μgL −1 for Cd and Zn; and 500, 1000, 2000, 3000, 4000μgL −1 for Cu and Pb. It was established that P. subcapitata exudates markedly decreased metal toxicity...
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