Organochlorine and organophosphorus pesticide residues in the Atoya river basin, Chinandega, Nicaragua

Castilho, José Antônio Alvares; Fenzl, Norbert; Guillén, Salvador Montenegro; Nascimento, Fernanda Souza do

doi:10.1016/s0269-7491(99)00277-8

Cited by 59 publications

(37 citation statements)

References 2 publications

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“…This confirms that sediments act as a sink for pollutants. In 2000, Castilho et al (24) reported higher levels of pesticide compounds in the bottom sediment of a Nicaraguan River System with intensive cotton production. Similarly, Ezemonye 2005 (25) also reported higher PCB values in the sediment of the Ethiope and Benin Rivers of the Niger Delta Region, Nigeria.…”

Section: Discussionmentioning

confidence: 99%

Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria

Ezemonye

Ikpesu

Tongo

2008

Archives of Industrial Hygiene and Toxicology

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This paper is the first attempt to quantify the levels and the distribution pattern of lindane in the surface water, sediment and fish (Chrysichthys furcatus and Tilapia zilli). The samples were collected from three stations (Ovwian, Ekakpamre, and Ovu) of the Warri River in the western Niger Delta of Nigeria in 2006: during the dry (January-April) and wet seasons (May-August). The analysis included a total of 96 samples made up of 24 samples each for water, sediment, and fish. The pesticide levels were analysed using high performance liquid chromatography to elucidate its distribution in various environmental compartments. Residue levels in the matrices ranged from below the detection limit (BDL) to 1.37µg L -1 in water, BDL to 12.66 µg g -1 dry weight (dw) in sediment, BDL to 16.67 µg g -1 dw in Chrysichthys furcatus, and BDL to 0.15 µg g -1 dw in Tilapia zilli .The observed values were above the ecological benchmarks (0.01 µg L -1 ) recommended by the Nigerian Environmental Protection Agency and European Union. They were also relatively higher than in previous studies on the Nigerian environment, which calls for regular monitoring of the Niger Delta water bodies.

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Section: Discussionmentioning

confidence: 99%

Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria

Ezemonye

Ikpesu

Tongo

2008

Archives of Industrial Hygiene and Toxicology

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“…However, the data for their residues in water or in sediments were scarce, which can be attributed to their lesser persistence. These currently used pesticides were monitored in river ecosystems (e.g., in Central American) and demonstrated that these substances are also relevant contaminants in the aquatic environment (Castillo et al 2000;Castilho et al 2000;Volker Laabs et al 2002).…”

Section: Levels Of Pesticide Residues In Sediment and Water Samples Imentioning

confidence: 99%

Composition, Distribution, and Characterization of Suspected Endocrine-Disrupting Pesticides in Beijing GuanTing Reservoir (GTR)

Xue

2006

Arch Environ Contam Toxicol

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Abstract. GuanTing Reservoir (GTR) is one of two main water resources for the agriculture, industry, and living uses of Beijing (China). As a result of extensive pollution over the last few decades (particularly the 1980s), the reservoir has not supplied potable water to Beijing city since 1997. Composition, distribution, and characterization of 31 suspected endocrine-disrupting pesticides in surface water, pore water, and surface sediments from the reservoir are reported in this study. An analytical procedure based on solid-phase extraction (SPE) technology and capillary gas chromatography with electroncapture detection has been developed for the simultaneous determination of the 31 suspected endocrine-disrupting pesticides including the compounds hexachlorocyclohexane, cyclodiene, diphenyl aliphatic, chlordane, and other selected pesticides (hexachlorobenzene, heptachlor, endrin aldehyde, hepachlor epoxide, dicofol, acetochlor, alachlor, metolachlor, chlorpyriphos, nitrofen, trifluralin, cypermethrin, fenvalerate, and deltamethrin). The result shows that the pesticide pollution is moderate in GTR and its tributaries, although pesticide residue values in a few sites are quite high when considering their endocrine-disrupting effects and chronic health effects. Among the analyzed pesticides, p,p¢-DDE, o,p¢-DDT, b-HCH, endosulfan sulfate, and aldrin were the most abundant pesticides in water while o,p¢-DOT, d-HCH, b-HCH, p,p¢-DDE, p,p¢-DDT, and endosulfan sulfate were the most abundant in sediment. The variation in concentration of pesticides among sites can be expected to be caused by several factors such as contaminants in the rivers and drainage of contaminated water from the surrounding agricultural fields.

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“…However, the data for their residues in water or in sediments were scarce, which can be attributed to their lesser persistence. But these currently used pesticides were monitored in Central American river ecosystems (Castillo et al, 2000;Castilho et al, 2000;Volker Laabs et al, 2002. ) demonstrated that these substances are also relevant contaminants in the aquatic environment.…”

Section: Levels Of Pesticides Residues In Sediment and Water Samplesmentioning

confidence: 99%

Screening 31 endocrine-disrupting pesticides in water and surface sediment samples from Beijing Guanting reservoir

2005

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For screening 31 potential or suspected endocrine-disrupting pesticides in water and surface sediments, a multiresidue analysis method based on gas chromatography with electron capture detection (GC/ECD) was developed. Solid phase extraction (SPE) technology with Oasis Ò HLB cartridge was also applied in sample extraction. The relevant mean recoveries were 70-103% and 71-103% for water and sediment, respectively. Relative standard deviations (RSD) are 2.0-7.0%, 4.0-8.0% for water and sediment, respectively. Thirty one pesticides (a-HCH, b-HCH, c-HCH, d-HCH, hexachlorobenzene (HCB), aldrin, heptachlor, endosulfan I & II, p,p 0 -DDD, o,p 0 -DDT, p,p 0 -DDT, p,p 0 -DDE, endrin aldehyde, endosulfan sulphate, methoxychlor, hepachlor epoxide, a-chlordane, c-chlordane, dieldrin, endrin, dicofol, acetochlor, alachlor, metolachlor, chlorpyriphos, nitrofen, trifluralin, cypermethrin, fenvalerate, deltamethrin) in water and surface sediment samples from Beijing Guanting reservoir were analyzed. Concentrations of pesticides ranged from 7.59 to 36.0 ng g À1 on a dry wt. basis for sediment samples, from 279.3 to 2740 ng l À1 for pore waters and from 48.8 to 890 ng l À1 for water samples, respectively, with a mean concentration of 10.7 ng g À1 in sediment, 735 ng l À1 in pore water and 295 ng l À1 in water, respectively. The data obtained provides information on the levels and sources of endocrine-disrupting pesticides in Guanting reservoir. These results underscore the need to improved environmental protection measures in order to reduce the exposure of the population and aquatic biota to these endocrine-disrupting compounds.

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Organochlorine and organophosphorus pesticide residues in the Atoya river basin, Chinandega, Nicaragua

Cited by 59 publications

References 2 publications

Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria

Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria

Composition, Distribution, and Characterization of Suspected Endocrine-Disrupting Pesticides in Beijing GuanTing Reservoir (GTR)

Screening 31 endocrine-disrupting pesticides in water and surface sediment samples from Beijing Guanting reservoir

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