Atrazine and Metolachlor Contamination in Surface and Ground Water in the Zomba/Bvumbwe Region in Malawi

Lakudzala, Deliwe Dinah

doi:10.18052/www.scipress.com/ILCPA.6.33

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Atrazine and Metolachlor Contamination in Surface and Ground Water in the Zomba/Bvumbwe Region in Malawi

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Abstract:

A snapshot survey was conducted to assess ground and surface water contamination by atrazine and metolachlor in the Zomba/Bvumbwe region. Ground and surface water samples were collected and their atrazine and metolachlor were extracted using ethyl acetate. The extracts were cleaned up using florisil, concentrated on a rotary evaporator and detected using thin layer chromatography. No herbicide residue was detected in the groundwater samples. In surface water samples atrazine was detected in 38 % and metolachlor was detected in 15 % of the samples. The concentrations of the herbicides were at their highest soon after the first run off event after herbicide application. The concentrations, however were generally below the World Health Organization's (WHO's) recommended maximum guideline values (2 μg/ml atrazine and 10 μg/ml) metolachlor. Following the first run off event concentrations of herbicides steadily decreased with time, decreasing to zero within eight weeks of herbicide application at 37 % of the water sampling points that had herbicide contamination. Light soaking rains, higher clay content, flat land, longer distance between agricultural land and surface water body (filtering area), lower herbicide application rates and herbicide incorporation seemed to reduce herbicide export to surface water. Based on the study it is recommended that regular monitoring of pesticides in water should be done and that quantification of the pesticides should be done more accurately using a gas or liquid chromatograph with appropriate detectors. It is also recommended to follow good land husbandry practices to reduce export of pesticides to surface water bodies.

Info:

Periodical:

International Letters of Chemistry, Physics and Astronomy (Volume 6)

Pages:

33-45

DOI:

https://doi.org/10.18052/www.scipress.com/ILCPA.6.33

Citation:

D. D. Lakudzala, "Atrazine and Metolachlor Contamination in Surface and Ground Water in the Zomba/Bvumbwe Region in Malawi", International Letters of Chemistry, Physics and Astronomy, Vol. 6, pp. 33-45, 2013

Online since:

January 2013

Authors:

Deliwe Dinah Lakudzala

Keywords:

Atrazine, Herbicides, Metolachlor, Water, Zomba/Bvumbwe Region

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Open Access

This work is licensed under a
Creative Commons Attribution 4.0 International License

References:

[1] Akerblom M., Environmental monitoring of pesticide residues. Guidelines for the SADC region. SADC ELMS, (1995).

[2] A. Ayanaba, W. Verstraete, M. Alexander, Proc. Am. Soil Sci. 37 (1973) 565-568.

[3] Banda L., A Study of the seasonal and spatial variations of chemical pollutants in Lunyangwa river basin, Mzuzu, Malawi. M. Sc. Thesis. Chancellor College, University of Malawi. Malawi, (2004).

[4] Chapman D., Water quality assessments, (UNESCO, WHO and UNEP), Chapman and Hall. New York and London (1992).

[5] Cheng H. H., (Ed. ). Pesticides in the soil environment: Processes, Impacts and Modelling. Soil Science Society of America Inc., Madison, WI., (1990).

[6] Du Preez L. H., Jansen Van Rensburg P. J., Jooste A. M., Carr J. A., Giesy J. P., Gross T. S., Kendall R. J., Smith E. E., Van Der Kraak G., Solomon K. R., Seasonal exposures to triazine and other pesticides in surface waters in the Western Highveld corn – production region in South Africa. Environ. Pollution 135(1) (2005).

DOI: https://doi.org/10.1016/j.envpol.2004.09.019

[7] EWG (Environmental working group). Weed killers by the glass, Fort Wayne, Indiana, (2004).

[8] http: /www. ewg. org/pub home/Reports/weed-killer/Fort Wayne. html EXTOXNET Pesticide information profile Metolachlor, (Extension Toxicology Network). (2000a). EXTOXNET Metolachlor (Dual) herbicide profile, 2/85. Extension Toxicology Network, 2000b.

[9] http: /www. extoxnet. orst. edu EXTOXNET Pesticide information profile Metolachlor, Extension Toxicology Network, (1996).

[10] Guenzi W. D., Pesticides in Soil and Water, Soil Science Society of America, Inc.: Madison, WI, (Ed. ) (1974).

[11] Hayes T. B., Collins A., Lee M., Mondoza M., Noriega N., Stuart A. A., Vonk A., Hermaphroditic, demasculined frogs after exposure to the herbicide atrazine at low ecologically relevant doses. Proc. Nat. Acad. Sci. U S A 99 (2002) 5476-5480.

DOI: https://doi.org/10.1073/pnas.082121499

[12] Hitch R. K., Akesson N. B., Jones A. W., Chapter 19: Intermediate range deposition of pesticides from arial applications, Lewis Publishers, (1995).

[13] Leng M. L. Leovy E. M. K., Zubkoff P. L., (Eds). Agrochemical environmental fate - state of the art. Lewis Publishers, (1995).

[14] Kamperewera A. M., Mbalame E., Banda A. M., Chilombe S., Hydrology, Water Quality Monitoring and Assessment, Malawi Environmental Monitoring Program (MEMP), Lilongwe, Malawi, (2000).

[15] Karrlson H., Muir D. G. D., Teixiera C. F., Buniston D. A., Hecky R. E., Strachan V. M. J., Gift N. P., Kidd K. A., Rosenberg B., Environ. Sci. Technol. 34 (2000) 4490-4495.

[16] Kearney P. C., Kaufman D. D., Herbicides chemistry, degradation and mode of action, (2nd Ed. ). Volume 1. Marcel Dekker Inc., (1975).

[17] Laabs V., Amelung W., Pinto A., Zech W., J. Environ. Qual. 31(1) (2002) 256-268.

[18] Lakudzala D. D., Sorption, degradation and movement of atrazine and metolachlor in some Malawi soils, PhD Thesis, University of Malawi, Zomba, Malawi, (2009).

[19] Lanchote V. L., Bonato P. S., Santos N. A., de Carvalho N. A., Gomes M. A., Water Air Soil Pollution 118 (2000) 329-337.

[20] Larson R. A., Weber E. J., Reaction mechanisms in environmental organic chemistry, Lewis Publishers, Boca Raton, Ann Arbor, London, Tokyo (1994).

[21] Lengyel Z., Foldenyi, R., J. Soils and Sediments 2(3) (2002) 155-160.

[22] Li Q. X., Huang E. C., Guo F., Bull. Environ. Contam. Toxicol. 66 (2001) 653-659.

[23] McConnell L., Environmental and agricultural factors controlling pesticide volatilization, transport and deposition – Monitoring results, 2005. http: /www. epa. gov/oppefedl/models/water/mcconell-second_april_2005. htm.

[24] MEREP. Malawi Economic Report on Environmental Policy. Office of the President and Cabinet, Government of Malawi, Lilongwe, (1995).

[25] Rebich R. A., Coupe R. H., Thurman E. M., J. Sci. total Environ. 321 (2004) 189-199.

[26] Saka J. K., Chemical pollution of Lake Chilwa. State of Lake Chilwa Environment Report No 16. Environmental Affairs Department, Lilongwe, Malawi, (1999).

[27] Savoca M. E., Eric M. Sadarf, S. Mike L., Kymm K. B. Akers., Effect of land use and hydrogeology on the water quality of alluvial aquifers in eastern Iowa and southern Minnesota. 1997 U. S, geological survey, Water Resources Investigations Report 99-4246. Iowa City, IA., (2000).

[28] Stockholm Convention. Stockholm Convention on Persistent Organic, Pollutants., Text and Annexes, Geneva, Switzerland, 2001. http: /www. pops. int.

DOI: https://doi.org/10.1007/978-3-642-28036-8_101506

[29] Sun H., Cornish P. S., Management options to minimize atrazine and metolachlor export from grain cropping areas. Proceedings of the 11th Australian Agronomy Conference, Geelung, 2003. http: /www. uws. edu. au.

[30] US EPA (United States Environmental Protection Agency). Groundwater and Drinking water. Technical Fact sheet on Atrazine. Nov. 2002. http: /www. epa. gov/OGWDW/dwh/t-soc/atrazine. html.

[31] USGS (United States Geological Surveys), Herbicide Fact sheet: Environmental contamination and ecological effects. J. Pesticide Reform 21(3), 2001. http: /www. pesticide. org/atrazineEnv. pdf.

[32] GOM (Government of Malawi)., SG 2000 Malawi. Sasakawa African Association/Global 2000 Agricultural Programme in Africa. Lilongwe, Malawi, (2006).

[33] Van Leeuwen J. A., Waltner-Toews D., Abernathy T., Smith B., Shokri M., Int. J. Epidemiol. 28 (1999) 836-890.

[34] WHO (World Health Organization), Guidelines for drinking – water quality. (2nd Ed. ). Vol. 2, Health criteria and other supporting information. World Health Organization. Geneva, Switzerland, 1996, pages 725-729.

DOI: https://doi.org/10.1002/food.19860300121

[35] WHO (World Health Organization), Public Health Impact of pesticides used in agriculture. World Health Organization. Geneva, (1990).

[36] Zeljezic D., Garaj-Vrhovac V., Perkovic P., Toxicol. in Vitro 20(6) (2006) 923-935.

[37] Zweig G., Sherma J., Analytical methods for pesticides and plant growth regulators. Volume VI Gas Chromatographic Analysis. Academic Press Inc. New York and London, (1972).

DOI: https://doi.org/10.1093/chromsci/12.2.36a

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DOI: https://doi.org/10.1080/03601234.2015.1000163

[2] J. Soko, "Agricultural Pesticide Use in Malawi", Journal of Health and Pollution, Vol. 8, p. 181201, 2018

DOI: https://doi.org/10.5696/2156-9614-8.20.181201

[3] I. Kosamu, C. Kaonga, W. Utembe, "A Critical Review of the Status of Pesticide Exposure Management in Malawi", International Journal of Environmental Research and Public Health, Vol. 17, p. 6727, 2020

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