하천둔치에 방역용 Deltamethrin 살포 시 하천수 중 잔류변화
Residual Change of Deltamethrin in Stream Water after Spaying for Pest Control of Stream Levee
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BACKGROUND: This study was performed to investigate the change of deltamethrin residue after spraying for control of hygienic insects in bush of levee at Bansuk-dong stream (A) and Juk-dong ditch (B) in Yuseong, Daejeon. The drop concentrations and disappearance of deltamethrin residue in stream water were determined to evaluate the toxic effects of stream ecosystem. METHODS AND RESULTS: Water samples were collected at 7 points including 0, 5, 10, 20, 40, 70 and 100 m downstream from the deltamethrin spraying point. Water sample was partitioned into dichloromethane, and was determined with GC/μ-ECD. Limit of Quantitation of deltamethrin was 0.04 μg/L. Recoveries of deltamethrin at two fortification levels of 0.4 and 2.0 μg/L were 91.57±3.13%(n=3) and 94.40±4.59%(n=3) in A stream,and 88.24±3.33%(n=3) and 85.20±3.73%(n=3) in B stream, respectively. Residue of A stream were from <0.04μg/L to 0.48 μg/L and B stream were from 0.08 μg/L to 14.95 μg/L under practice application condition. And residues were from <0.04 μg/L to 0.2 μg/L in A stream treated deltamethrin with 1.0 mg level at the upper region. CONCLUSION(S): Practice application of deltamethrin for the pest control of waterside was not much shown toxic effect to ecosystem of stream.
Abstract
BACKGROUND: This study was performed to investigate the change of deltamethrin residue after spraying for control of hygienic insects in bush of levee at Bansuk-dong stream (A) and Juk-dong ditch (B) in Yuseong, Daejeon. The drop concentrations and disappearance of deltamethrin residue in stream water were determined to evaluate the toxic effects of stream ecosystem. METHODS AND RESULTS: Water samples were collected at 7 points including 0, 5, 10, 20, 40, 70 and 100 m downstream from the deltamethrin spraying point. Water sample was partitioned into dichloromethane, and was determined with GC/μ-ECD. Limit of Quantitation of deltamethrin was 0.04 μg/L. Recoveries of deltamethrin at two fortification levels of 0.4 and 2.0 μg/L were 91.57±3.13%(n=3) and 94.40±4.59%(n=3) in A stream,and 88.24±3.33%(n=3) and 85.20±3.73%(n=3) in B stream, respectively. Residue of A stream were from <0.04μg/L to 0.48 μg/L and B stream were from 0.08 μg/L to 14.95 μg/L under practice application condition. And residues were from <0.04 μg/L to 0.2 μg/L in A stream treated deltamethrin with 1.0 mg level at the upper region. CONCLUSION(S): Practice application of deltamethrin for the pest control of waterside was not much shown toxic effect to ecosystem of stream.
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