Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling

Research output: Contribution to conferencePaperAcademicpeer-review

Abstract

Passive samplersare able to recoverthe detectionof low concentrations usingcontinuous gatheringthe pollutants.While these contaminants might beundetected withtheconventional grab samplingwhich is anonce-off time-point sampling.In this study,Silicone rubber sheet samplers were used as the passive sampler to monitor the residue of some organochlorine pesticides, notably; α-HCH, β-HCH, γ-HCH, δ-HCH, Heptachlor, Aldrin, Heptachlor Epoxide, pp-DDE, Endrin, Dieldrin, α-endosulfan, β-endosulfan, pp-DDD, Endrin aldehyde, pp-DDT, Endosulfan Sulphate and Methoxychlor in the Lake Naivasha basin, Kenya.The samplers were deployed in the water for one month after which the concentration of the pesticides was measured by analyzing the extraction of samplers using the GC-ECD. Determiningthe organochlorine pesticidesresidues by means ofthe Silicone rubbersamplers demonstrated thatthe maximumcontamination occurredat the lake sitewith the total sum concentration of 81ng/L which is the final accumulation location for surficial hydrological,chemical and sediment transport through the river basin. The total organochlorine residue changed to 71.5ng/L for the Middle Malewa and 59ng/L for the Upper Malewa river sampling sites.Finally, comparing the concentration of the studied pesticides with the maximum standard limit showed that the concentrations were below the limit. However, because of the risk of these pesticides continued monitoring of pesticides residues in the catchment remains highly recommended.
Original languageEnglish
Pages1-4
Number of pages4
DOIs
Publication statusPublished - 7 Apr 2019
Event4th World Congress on Civil, Structural, and Environmental Engineering 2019 - Rome, Italy
Duration: 7 Apr 20199 Apr 2019
Conference number: 4
https://www.2019.cseecongress.com/

Conference

Conference4th World Congress on Civil, Structural, and Environmental Engineering 2019
CountryItaly
CityRome
Period7/04/199/04/19
OtherThe congress is composed of 3 conferences. While each conference consists of an individual and separate theme, the 3 conferences share considerable overlap, which prompted the organization of this congress.

ICGRE'19 - 4th International Conference on Geotechnical Research and Engineering
ICSECT'19 - 4th International Conference on Structural Engineering and Concrete Technology
ICEPTP'19 - 4th International Conference on Environmental Pollution, Treatment and Protection
Internet address

Fingerprint

pesticide residue
HCH
sampler
endosulfan
water resource
catchment
pesticide
lake
sampling
monitoring
organochlorine
DDD
pollutant
dieldrin
DDE
aldehyde
rubber
DDT
sediment transport
river basin

Cite this

Abbasi, Y., & Mannaerts, C. M. (2019). Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling. 1-4. Paper presented at 4th World Congress on Civil, Structural, and Environmental Engineering 2019, Rome, Italy. https://doi.org/10.11159/iceptp19.109
Abbasi, Y. ; Mannaerts, C.M. / Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling. Paper presented at 4th World Congress on Civil, Structural, and Environmental Engineering 2019, Rome, Italy.4 p.
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Abbasi, Y & Mannaerts, CM 2019, 'Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling' Paper presented at 4th World Congress on Civil, Structural, and Environmental Engineering 2019, Rome, Italy, 7/04/19 - 9/04/19, pp. 1-4. https://doi.org/10.11159/iceptp19.109

Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling. / Abbasi, Y.; Mannaerts, C.M.

2019. 1-4 Paper presented at 4th World Congress on Civil, Structural, and Environmental Engineering 2019, Rome, Italy.

Research output: Contribution to conferencePaperAcademicpeer-review

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N2 - Passive samplersare able to recoverthe detectionof low concentrations usingcontinuous gatheringthe pollutants.While these contaminants might beundetected withtheconventional grab samplingwhich is anonce-off time-point sampling.In this study,Silicone rubber sheet samplers were used as the passive sampler to monitor the residue of some organochlorine pesticides, notably; α-HCH, β-HCH, γ-HCH, δ-HCH, Heptachlor, Aldrin, Heptachlor Epoxide, pp-DDE, Endrin, Dieldrin, α-endosulfan, β-endosulfan, pp-DDD, Endrin aldehyde, pp-DDT, Endosulfan Sulphate and Methoxychlor in the Lake Naivasha basin, Kenya.The samplers were deployed in the water for one month after which the concentration of the pesticides was measured by analyzing the extraction of samplers using the GC-ECD. Determiningthe organochlorine pesticidesresidues by means ofthe Silicone rubbersamplers demonstrated thatthe maximumcontamination occurredat the lake sitewith the total sum concentration of 81ng/L which is the final accumulation location for surficial hydrological,chemical and sediment transport through the river basin. The total organochlorine residue changed to 71.5ng/L for the Middle Malewa and 59ng/L for the Upper Malewa river sampling sites.Finally, comparing the concentration of the studied pesticides with the maximum standard limit showed that the concentrations were below the limit. However, because of the risk of these pesticides continued monitoring of pesticides residues in the catchment remains highly recommended.

AB - Passive samplersare able to recoverthe detectionof low concentrations usingcontinuous gatheringthe pollutants.While these contaminants might beundetected withtheconventional grab samplingwhich is anonce-off time-point sampling.In this study,Silicone rubber sheet samplers were used as the passive sampler to monitor the residue of some organochlorine pesticides, notably; α-HCH, β-HCH, γ-HCH, δ-HCH, Heptachlor, Aldrin, Heptachlor Epoxide, pp-DDE, Endrin, Dieldrin, α-endosulfan, β-endosulfan, pp-DDD, Endrin aldehyde, pp-DDT, Endosulfan Sulphate and Methoxychlor in the Lake Naivasha basin, Kenya.The samplers were deployed in the water for one month after which the concentration of the pesticides was measured by analyzing the extraction of samplers using the GC-ECD. Determiningthe organochlorine pesticidesresidues by means ofthe Silicone rubbersamplers demonstrated thatthe maximumcontamination occurredat the lake sitewith the total sum concentration of 81ng/L which is the final accumulation location for surficial hydrological,chemical and sediment transport through the river basin. The total organochlorine residue changed to 71.5ng/L for the Middle Malewa and 59ng/L for the Upper Malewa river sampling sites.Finally, comparing the concentration of the studied pesticides with the maximum standard limit showed that the concentrations were below the limit. However, because of the risk of these pesticides continued monitoring of pesticides residues in the catchment remains highly recommended.

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Abbasi Y, Mannaerts CM. Monitoring pesticides residues in water resources of the Lake Naivasha catchment using passive sampling. 2019. Paper presented at 4th World Congress on Civil, Structural, and Environmental Engineering 2019, Rome, Italy. https://doi.org/10.11159/iceptp19.109