Assessment of spiromesifen peculiarities of migration into groundwater and surface water and prediction of risks to human health when using such water for drinking purposes

Abstract

Objective: To study the peculiarities of the migration of spiromesifen into groundwater and surface water and to predict the risks to human health when using such water for drinking purposes. Methodology: Field experiments to study the dynamics of residual amounts of spiromesifen, its stability and behavior in the soil after fan spraying of apple orchard and vineyard were conducted in different soil and climatic conditions: Steppe, ForestSteppe, Polissya. Koc, GUS and LEACHmod were used to assess the migration capacity of the insecticide. To predict the risk, we used the integrated hazard vector of groundwater pollution (R) and an integral index of hazard of pesticide contaminated water consumption (IIHPCWC). Results: The calculated value of GUS (-0.92) and leaching index (3.3 × 10-5 ) allow to pertain spiromesifen to a low level of risk of leaching into groundwater – hazard class 3. It was established that spiromesifen by persistency in soil in soil and climatic conditions of Steppe, Forest-Steppe, Polissya belongs to low-stability pesticides, and characterized by low mobility in soil. Conclusion: It was shown that spiromesifen is a moderately hazardous substance for humans due to groundwater contamination (class 3) and low-risk (class 4) due to surface water contamination by the integral index of hazard of pesticide contaminated water consumption.