Toxicity Assessment of the Main Waste of Soda Production by Phytotesting

Abstract

The paper investigates the use of cress (Zabava and Krupnolistovoi varieties) and wheat (Salavat Yulaev and Omskaya varieties) as phytoecological indicators. The object for testing was still waste liquid, the main waste of soda ash production. The toxicity was assessed by three parameters (seed germination, length and dry weight of the seedlings). It is shown that the still waste liquid has an acute toxic effect on all phytoecological indicators used. It has been found that the regression equations for seed germination and dry weight of seedlings in contrast to their average length for all plants do not adequately describe the experimental results and can not be used to evaluate the safe dilution factor. The safe dilution factor, determined by the average length of the seedlings, for cress Zabava is 34.7 and cress Krupnolistovoi is 34.4, and for wheat Salavat Yulaev is 73.0 and for wheat Omskaya is 81.8. It was established that the safe dilution factor determined with the use of different plant species varies quite strongly.

Development of technology of disinfectants based on soda production waste

“…The main components are CaCO 3 and CaCO 4 . It is known that iodine monochloride is a fairly effective disinfectant with a wide spectrum of action (it has antibacterial, antiviral and antiparasitic activity) [2][3][4][5][6][7].…”

“…The concentration values of the active substance were measured by spectrophotometry according to the optical density [5,[20][21][22].…”

The Application of Phytotesting Method to Assess the Toxicity of Titanium Etching Effluents

“…Recently, to determine the toxicity of effluents various phytoecological indicators have been increasingly used, one of which is the cress [7][8][9]. The advantage of using the latter as a phytoecological indicator is due to the responsiveness to the environment toxicity of three parameters (germination, seedlings length and seedlings dry weight).…”