The behavior of terbuthylazine, tebuconazole, and alachlor during denitrification process

The behavior of terbuthylazine, tebuconazole, and alachlor during denitrification process

Článek WoS

Pesticide compound can influence denitrification processes in groundwater in many ways. This study observed behavior of three selected pesticides under denitrifying conditions. Alachlor, terbuthylazin, and tebuconazole, in a concentration of 0.1 mL L-1, were examined using two laboratory denitrifications assays alachlor; terbuthylazine; tebuconazole; inhibition; laboratory denitrification assays: a "short" 7-day and a "long" 28-day test. During these tests, removal of pesticides via adsorption and biotic decomposition, as well as the efficiency of nitrate removal in the presence of the pesticides, were measured. No considerable inhibition of the denitrification process was observed for and of the pesticides. On the contrary, significant stimulation was observed after 21 days for alachlor (49%) and after seven days for terbuthylazine (40%) and tebuconazole (36%). Adsorption was in progress only during the first seven days in the case of all tested pesticides and increased only negligibly afterwards. Immediate adsorption of terbuthylazine was probably influenced by the mercuric chloride inhibitor. A biotic loss of 4% was measured only in the case of alachlor.

Pesticide compound can influence denitrification processes in groundwater in many ways. This study observed behavior of three selected pesticides under denitrifying conditions. Alachlor, terbuthylazin, and tebuconazole, in a concentration of 0.1 mL L-1, were examined using two laboratory denitrifications assays alachlor; terbuthylazine; tebuconazole; inhibition; laboratory denitrification assays: a "short" 7-day and a "long" 28-day test. During these tests, removal of pesticides via adsorption and biotic decomposition, as well as the efficiency of nitrate removal in the presence of the pesticides, were measured. No considerable inhibition of the denitrification process was observed for and of the pesticides. On the contrary, significant stimulation was observed after 21 days for alachlor (49%) and after seven days for terbuthylazine (40%) and tebuconazole (36%). Adsorption was in progress only during the first seven days in the case of all tested pesticides and increased only negligibly afterwards. Immediate adsorption of terbuthylazine was probably influenced by the mercuric chloride inhibitor. A biotic loss of 4% was measured only in the case of alachlor.

alachlor; terbuthylazine; tebuconazole; inhibition; laboratory denitrification assay

alachlor; terbuthylazine; tebuconazole; inhibition; laboratory denitrification assay

PÁNIKOVÁ, K.; BÍLKOVÁ, Z.; MALÁ, J.

2024

01.10.2023

MDPI

2039-4713

Journal of Xenobiotics

13

4

Švýcarská konfederace

560

571

12

https://www.mdpi.com/2039-4713/13/4/36

http://hdl.handle.net/11012/214422

jox-13-00036