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环境科学学报 2012
Model development and optimization on the combined algal growth inhibition effects of two allelochemicals
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Abstract:
Based on the separate algal inhibition effects of two allelochemicals, pyrogallic and linolenic acid, the joint algal growth inhibition effects of varying combinations of these two allelochemicals were studied. The mathematical model of algal growth inhibition by combined effects of the two allelochemicals was established by micro-element analysis and relevant partial differential equation, based on the dynamics and characteristics of algal density during experiment. The law of algal density changing with time can be effectively analysed and forecast by this model when joint pyrogallic and linolenic acid in certain concentration range used to inhibit algal growth. Based on this model, the half effective concentration (EC50) and the minimal inhibitory concentration (MIC) of combined algal growth inhibition effect of allelochemicals, the optimal combination of concentration for joint algal growth inhibition, as well as the optimal combination of concentration for joint algal growth inhibition in the context of cost control at different time points can be projected. The finding of the present study was of theoretical significance and practical value for guiding the preparation of efficient and economical joint biological algal growth inhibitory agents.
