Study of the toxicity of a corrosion inhibitor for macrophytes

Abstract

This article presents the results of studies of the toxicity of a corrosion inhibitor used to treat oilfield equipment in relation to a representative of submerged aquatic plants – Elodea canadensis. The characteristics of the toxicant and research methods are given in detail. The method of mathematical processing is indicated. The work presents the results of studying the toxicity of the substance in a wide range of concentrations: from 100 to 5000 mg/dm³ (4 days – acute experience) and 0,05–500,0 mg/dm³ (30 days – chronic experience). During the experiment, changes in the condition and survival of plants, morphological indicators (growth of the main shoot, number of lateral shoots and their length, number of roots and their length, total growth of elodea) were observed. It has been established that the maximum amounts of the substance (5000 and 500 mg/dm³ – acute and chronic experiments, respectively) cause 100% plant death. Lower concentration ranges stimulate morphological parameters. According to the research results, 0,5 mg/l can be taken as a threshold concentration for an inhibitor, and 0,05 mg/l is acceptable.