Organochlorine pesticides in residues in waters from the coastal area of Dar es Salaam and their effect on aquatic biota

Mwevura, Haji; Othman, OC; Mhehe, G.L.

doi:10.4314/tjs.v28i2.18360

Cited by 8 publications

(8 citation statements)

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“…The current study, when compared with values from studies conducted on other water bodies with agricultural activities along them generally indicates that whereas the recess concentration levels of OCP pesticides in the river Afram are lower, those of the flood regimes are higher (Table 5). This is true both for local studies by [9][10][11][12][13] as well as for studies from other regions carried out by [14][15][16][17]. However, OCP residues from Densu River [18] in Ghana were about 3 folds higher than the flood concentration from the current studies.…”

Section: Resultscontrasting

confidence: 41%

Drawdown Farming and Pesticide Residue Levels of the Afram River in Ghana

Senyo

Komla

Oduro

2016

IJEMA

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Abstract:Cultivation of fruits and vegetables in the drawdown areas (floodplains) of the Afram River relies on pesticides input for enhanced productivity. Application of pesticides in the floodplains can elevate its level in the water and have health implications. Pesticides content of the Afram River at normal level (recess regime) was compared with the flood regime to determine if farming in the drawdown areas has any impact on water quality. Water samples were taken twice during each regime over two consecutive years and pesticide residues were analysed by gas chromatography. The flood periods registered 14 organochlorines, 12 organophosphates and 9 pyrethroids, with respective mean concentration ranges: 0.01 -16.79, 0.01 -2.14, 0.01 -1.12 µg/L; as against 10 organochlorines, 11 organophosphates and 4 pyrethroids quantified during the recess regimes, with respective mean concentration ranges of: 0.01 -0.27, 0.01 -0.37, 0.01 -0.158 µg/L. Levels of 9 pesticides exceeded WHO/EU maximum residue limits for the flood period, in contrast to only 1 during the recess. Dieldrin, endrin, chlorpyrifos and β-endosulfan exceeded quality criteria limits for the protection of aquatic life during flood regime. Welch two sample t-test on common pesticides quantified during both periods show significantly higher concentrations (p ≤ 0.05) during flood regimes. It is concluded that drawdown farming increases the incidence and concentration of pesticides in water during flood periods and presents health risk to the consuming communities and aquatic life.

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Section: Resultscontrasting

confidence: 41%

Drawdown Farming and Pesticide Residue Levels of the Afram River in Ghana

Senyo

Komla

Oduro

2016

IJEMA

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“…They reported residues of lindane, aldrin, p,p'-DDT and p,p'-DDE in most of the samples, whereas endosulfan, dieldrin, p,p'-DDT and endrin were either present in low concentration or absent in most samples [29]. Study conducted on the Pesticide residues in Kenyan rivers and lakes have reported high level of α -HCH, β -HCH, lindane, endosulfan, heptachlor, aldrin, heptachlor epoxide, dieldrin, endrin and methoxychlor in soil and water from the sugar belt zone of lake Victoria basin [27,22] In comparison to studies carried out in other countries, Mwevura et al, (2002) reported few organochlorine pesticides residue at lower frequencies p, p'-DDT (25%); p,p'-DDE (37%) during dry season and high frequencies during wet season giving frequencies of p, p'-DDT (81%) p,p'-DDE (100%), dieidrin (100%) and γ-HCH (6%) in samples from the coast area of Dar es Salaam, Tanzania [30].…”

Section: Discussionmentioning

confidence: 93%

Organochlorine Pesticides Residues in Water and Sediment from Rusinga Island, Lake Victoria, Kenya

Macharia¹,

Abongo²,

Wandiga³

et al. 2016

IOSR

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This study was carried out to investigate the organochlorine pesticide residue level in representative sites in Rusinga Island of Lake Victoria, Kenya. Sediment and water samples from five sites along the shores of Rusinga Island in Lake Victoria were collected and analysed for selected organochlorine pesticides (OCP) using gas chromatography equipped with electron capture detector and confirmed using GC/MS. The pesticides targeted were p,p'-DDT, γ-HCH, α-HCH, β-HCH, δ-HCH, aldrin, dieldrin, heptachlor, heptachlor epoxide, p,p'-DDE, p,p'-DDD, endrin, endrin, aldehyde, endosulfan sulfate, methoxychlor and endosulfan. The samples were collected seasonally between the months of September 2012 to May 2013. The residue levels of organochlorine pesticides in water samples during dry season ranged between BDL to 9.84±1.20µg/L. The levels in wet season ranged between below detection limit (BDL) to 15.53±0.20 µg/L. Organochlorine pesticide detected in sediment during dry season ranged between BDL to 32.91 ± 3.84. Wet season the levels ranged between below detection limit (BDL) to 24.84±2.65 µg/Kg. The present result shows that organochlorines pesticides are still detected in our environment which can negatively affect our environment. This study provides baseline data on the levels of OCP residues in sediment and water from Lake Victoria. This will inform policy makers on the quality of water of Lake Victoria Basin as well as supplement the country's studies as an obligation for all parties to the Stockholm Convention on POPs.

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“…Once in the aquatic environment, pesticides are absorbed by aquatic organisms and concentrated in the trophic food chain thus endangering the life of fish and other organisms [4][5][6][7][8][9]. It has been found that greater than 80% of the total intake of pesticides residues by humans is through the food chain via consumption of contaminated food [10]. Fish accumulate contaminants directly from water and/or through the food chain.…”

Section: Introductionmentioning

confidence: 99%

Analysis of organochlorine pesticides residues in fish from Edko Lake (North of Egypt) using eco-friendly method and their health implications for humans

et al. 2021

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Levels of organochlorine pesticides (OCPs) residues in tilapia fish and their health risk associated with the consumption of fish from Edko lake, Egypt were determined. The quick, easy, cheap, effective, rugged, and safe method (QuEChERS) was used for extraction and clean-up of 18 OCPs residues from fish followed by GC-ECD and GC-ITD analytical tools were employed for identification of OPs. Out of the 18 OCPs, only heptachlorepoxide, p,p-DDE, dieldrin, p,p-DDD, and endrin ketone were detected in muscles of fish with concentrations of 0.1144, 0.2119, 0.4352, 0.1196, and 0.1323 µg/Kg bw, respectively. Results of the risk assessment calculations showed that dieldrin had a health risk index of more than one. This means that there was a health risk to adults associated with the consumption of fish. On the other hand, heptachlorepoxide, p,p-DDE, p,p-DDD, and endrin ketone did not show any direct health risk. Contamination of fish, collected from Edko lake in Egypt, with residues of OCPs might pose health implications if fish were consumed fresh.

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Organochlorine pesticides in residues in waters from the coastal area of Dar es Salaam and their effect on aquatic biota

Cited by 8 publications

References 0 publications

Drawdown Farming and Pesticide Residue Levels of the Afram River in Ghana

Drawdown Farming and Pesticide Residue Levels of the Afram River in Ghana

Organochlorine Pesticides Residues in Water and Sediment from Rusinga Island, Lake Victoria, Kenya

Analysis of organochlorine pesticides residues in fish from Edko Lake (North of Egypt) using eco-friendly method and their health implications for humans

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