Determination of Organochlorine Pesticide Residues in Soil and Water from River Nyando Drainage System Within Lake Victoria Basin, Kenya

Getenga, Zachary; Kengara, Fredrick Orori; Wandiga, S.O.

doi:10.1007/s00128-003-9107-3

Cited by 54 publications

(29 citation statements)

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“…In comparison, the recoveries decreased for two others in which the buffer was not used. Therefore, the authors concluded that the combination of 4 g of MgSO 4 , 0.1% acetic acid, and 1 g of NaCl enabled the highest recoveries for all of the compounds [8].…”

Section: Prevention Of Agglomerationmentioning

confidence: 97%

“…The storage temperature ranged from -20 ºC [48] to room temperature [1]. 4. QuEChERS Extraction -Optimisation of the extraction parameters…”

Section: Figure 1 Steps In Quechers Extraction A-sieving B-teflon mentioning

confidence: 99%

“…In QuEChERS, the initial single-phase extraction with ACN is followed by the addition of salts (MgSO 4 and NaCl) to induce phase separation [51]. The addition of NaCl typically leads to increased recoveries of polar compounds, but this also depends on the nature of the solvents involved in the partitioning step, and allows the control of the percentage of water in the organic phase.…”

Section: Quechers Contentmentioning

confidence: 99%

“…The modifications to the original QuEChERS consisted in adding 1% acetic acid to ACN for extraction, and the use of MgSO 4 and CH 3 Padilla-Sánchez et al [35] studied the extraction of chlorophenols, alkylphenols, nitrophenols and cresols using a mixture of CH 3 COONa, MgSO 4 and NaCl.…”

Section: Quechers Contentmentioning

confidence: 99%

“…On the other hand, Mei et al [28] used only MgSO 4 for the extraction of five herbicides with small sample weight (1 g) and, thereafter, the method was then scaled, requiring only 0.1 g of MgSO 4 .…”

Section: Prevention Of Agglomerationmentioning

confidence: 99%

See 4 more Smart Citations

QuEChERS and soil analysis. An Overview.

Vera¹,

Correia-Sá²,

Paíga³

et al. 2013

Sample Preparation

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Section: Prevention Of Agglomerationmentioning

confidence: 97%

“…The storage temperature ranged from -20 ºC [48] to room temperature [1]. 4. QuEChERS Extraction -Optimisation of the extraction parameters…”

Section: Figure 1 Steps In Quechers Extraction A-sieving B-teflon mentioning

confidence: 99%

Section: Quechers Contentmentioning

confidence: 99%

Section: Quechers Contentmentioning

confidence: 99%

Section: Prevention Of Agglomerationmentioning

confidence: 99%

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QuEChERS and soil analysis. An Overview.

Vera¹,

Correia-Sá²,

Paíga³

et al. 2013

Sample Preparation

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Potential impacts of agricultural development on freshwater biodiversity in the Lake Victoria basin

Soesbergen

Sassen

Kimsey

et al. 2019

Aquatic Conservation

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The Lake Victoria basin (LVB) and its tributary rivers are a major biodiversity hot spot, containing at least 234 native fish species, 135 native aquatic plant species, and 50 native freshwater mollusc species. Lake Victoria itself is home to around 500 fish species, most of which are haplochromine cichlids. The LVB is increasingly under threat from unsustainable land conversion and the intensification of agriculture. High population growth is driving the expansion of agriculture, urbanization, and freshwater abstractions, which have a profound impact on freshwater biodiversity. In addition, increased demand for agricultural crops from domestic and international markets are likely to lead to larger agricultural operations, further threatening freshwater biodiversity. This study explores these potential future impacts on the biodiversity found in freshwater rivers in the LVB as a result of projected future changes in land use. A newly developed database of land‐use impacts on freshwater biodiversity is introduced, with a focus on ecological community composition data from freshwater habitats under human pressures. Impacts on freshwater biodiversity are then projected under four different scenarios of land‐use change. Results show that land use has a significant impact on freshwater biodiversity. Freshwater biodiversity is projected to be at most risk in sub‐basins in the Tanzanian, Rwandan, and Burundian part of the LVB, such as the Kagera and Magoga/Isonga sub‐basins. Local species richness levels are particularly affected in the Magoga/Isonga sub‐basin in Tanzania, with an average loss of 10.8% across all scenarios. Model results show the potential to identify broad spatial patterns of likely threats and pressures on freshwater ecosystems under different socio‐economic futures. The analysis of these patterns, where they are consistent and where they differ, can support the production of policy that strives to find the optimal balance between development and conservation in an uncertain future.

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Trophic resources and emergent food web attributes in rivers of the Lake Victoria Basin: a review with reference to anthropogenic influences

Masese

McClain²

2012

Ecohydrology

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The ecology of Lake Victoria and rivers draining its 180 000 km2 basin has changed over the past century in response to growing anthropogenic influences that have altered basal resources, trophic status and interactions and river flow regimes. Impacts on the ecology of the lake are well known, but little attention has focused on the ecological status of rivers supplying ecological services to the majority of the basin's over 30 million inhabitants. In this paper, we review existing research on the ecological status of streams and rivers in the Lake Victoria Basin (LVB) and evaluate how they fit into emerging models of riverine ecosystem function in the tropics. Studies to date indicate that allochthonous sources dominate inputs to food webs in forested headwaters and savanna mid‐reaches of rivers in the LVB, although transfer pathways vary with position in the river. Although riparian vegetation phenology and hydrologic run‐off pathways control the spatial and temporal fluxes of energy inputs in headwater streams; animals play increasingly important roles in savanna mid‐reaches. Over the last half century, food web studies have revealed widespread omnivory and a tendency toward increased omnivory among fishes whose diets were more specialized prior to the introduction of Lates niloticus and the ecological changes in the lake. Ecological patterns and processes in LVB rivers generally fit emerging models for the tropics, but studies completed to‐date do not find autotrophic energy sources to be important. The findings of this review highlight the importance of specific management actions and needs for future research. Copyright © 2012 John Wiley & Sons, Ltd.

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Determination of Organochlorine Pesticide Residues in Soil and Water from River Nyando Drainage System Within Lake Victoria Basin, Kenya

Cited by 54 publications

References 0 publications

QuEChERS and soil analysis. An Overview.

QuEChERS and soil analysis. An Overview.

Potential impacts of agricultural development on freshwater biodiversity in the Lake Victoria basin

Trophic resources and emergent food web attributes in rivers of the Lake Victoria Basin: a review with reference to anthropogenic influences

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