Pollution characteristics and ecological risks of amide herbicides in surface water in Shijiazhuang section of the Hutuo River Basin
In order to study the pollution characteristics and ecological risks of amide herbicides(AHs)in the surface waters in Shijiazhuang section of the Hutuo River,surface water samples were collected in December 2021(winter)and April 2022(spring),respectively.AHs in surface water samples were analyzed using solid phase extraction and gas chromatography-tandem mass spectrometry.The results showed that:AHs were more contaminatedin spring(3.01-19.81 ng/L)than those in winter(1.10-6.30 ng/L).Propisochlor,acetochlor and metolachlor were the AHs with high residue levels and widespread in the river.The sampling site 5A was more polluted and the main source was agricultural production.The ecological risk of AHs was assessed using the entropy method,and the results showed that the ecological risk of AHs in water in the Hutuo River basin was at a low level.
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