Pesticide residues in water from TPC sugarcane plantations and environs, Kilimanjaro region, Tanzania

Hellar, H; Kishimba, MA

doi:10.4314/tjs.v31i1.18405

Cited by 13 publications

(19 citation statements)

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“…Another study in Nicaragua showed high concentrations of DDT and its metabolites in the dry period (Hellar & Kishimba ). The highest concentrations in the dry period may relate to the physicochemical characteristics of water insolubility of OCPs (Hamilton & Crossley ).…”

Section: Resultsmentioning

confidence: 99%

Contamination by organochlorine pesticides in the aquifer of the Ring of Cenotes in Yucatán, México

Rodríguez

Alberto

Sánchez

et al. 2014

Water & Environment J

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Banned or restricted organochlorine pesticides in many countries worldwide are still in use in developing countries for agricultural and livestock activities, as well as for vector control in public health campaigns. The present study was conducted to map estimated concentrations of organochlorine pesticides in a karstic region in the Yucatan Peninsula, Mexico, known as ‘Ring of Cenotes’. Water samples from 20 sinkholes (‘cenotes’) were collected during the dry and rainy seasons in 2010–11, analysed by gas chromatography and maps of pesticide concentrations were produced using geographical information system. Results show the presence of banned pesticides, all of them exceeding the limits stated by the Mexican Official Norm. The number and concentration of pesticides during the dry season were qualitatively and quantitatively higher than in the rainy season. The spatial distribution of pesticide concentrations shows that causes of pesticide pollution in the aquifer of the Ring of Cenotes are multifactorial.

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Section: Resultsmentioning

confidence: 99%

Contamination by organochlorine pesticides in the aquifer of the Ring of Cenotes in Yucatán, México

Rodríguez

Alberto

Sánchez

et al. 2014

Water & Environment J

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“…Among the monitored compounds, seven of them were detected in water samples, while eight of them were detected in the sediment samples summarised in Table 6. (Hellar and Kishimba, 2005). Concentrations of the other detected OCP were very low in both water and sediment samples.…”

Section: Organochlorine Pesticide Residues (Ocp)mentioning

confidence: 88%

“…Analysis of surface waters collected close to the plantations in the past revealed contamination by different types of pesticide residues (Hellar-Kihampa, 2011;Hellar and Kishimba, 2005). The regions are also among the few areas that produce flowers for export in Tanzania.…”

Section: Introductionmentioning

confidence: 99%

Quantification of micropollutants in some water sources in northern Tanzania

Hellar-Kihampa¹

2016

Journal of Applied Sciences and Environmental Management

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ABSTRACT:The loading of micropollutants in freshwater ecosystems to levels exceeding their waste assimilative capacity is a threat to both ecology of the ecosystems and health of the resource users. Some chemical species are of much concern due to their persistence, bioaccumulative and toxicity nature, even at trace levels, while others are of concern due to their contribution to eutrophication, oxygen depletion and other disruptive changes. Despite contamination threats from human activities around catchment areas in Tanzania, specific extent of the impacts are rather not well investigated. In this work, we quantified concentration levels of some major elements, trace elements, dissolved inorganic ions, nutrients and organochlorine pesticide residues in river water and sediments from northern Tanzania. Information on land use practices in the area, which represents potential sources of contamination, was gathered. Samples were collected from pre-selected stations in two different seasons and characterized for physico-chemical parameters. Preparation and instrumental analysis of samples was done by standard analytical protocols. Obtained results indicated contamination by some micropollutants, including some dissolved ionic species in water: Na + (> 200 mg/l), K + (> 25 mg/l), Mg 2+ (> 50 mg/l) and NO 3 --N (> 80 mg/l). High concentrations of some toxic metals were also measured in sediment samples, including V (325 mg/kg), Cr (270 mg/kg), Cu (114 mg/kg), Ni (85 mg/l) and Zn (355 mg/kg). Low levels of organochlorine pesticide residues were measured. Concentration levels were compared to water and sediment quality guidelines to establish their ecotoxicological risk implications. © JASEM http://dx.doi.org/10.4314/jasem.v20i3.8

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“…The contamination of the environment with pesticide residues in environmental matrices could result in water pollution and thus endangering human health and non-target species. Cases of water pollution as well as soil and food contamination in Tanzania and elsewhere have been documented (Henry and Kishimba, (2002); Hellar et al, 2005;Mihale, 2004;Aktar et al, 2009;Kihampa et al, 2010aKihampa et al, , 2010bChowdhury et al, 2012) and some health effects have been correlated with pesticide pollution (Ngowi, 2002;Agenda, 2006). As part of this review, surface water and ground water is the compartment of concern.…”

Section: Pesticide Pollutionmentioning

confidence: 99%

Agrochemicals use in horticulture industry in Tanzania and their potential impact to water resources

Lema

Machunda²,

Njau³

2014

Int. J. Bio. Chem. Sci

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The objective of this review was to analyze the existing information on the use of agrochemicals (Fertilizers and Pesticides) in the Tanzanian horticulture industry especially the Northern regions and their potential to impacting water resources. Agrochemicals play an important role in horticulture, and have been widely used in Tanzania for crop protection and increasing productivity. Apart from these benefits, agrochemicals have the potential to impair the quality of water resources for different end uses. Majority of communities in Tanzania depend on surface water from rivers and lakes for potable uses such as washing, drinking and domestic animals also drink from these sources. Reports from studies done in Northern Tanzania have indicated the presence of significant levels of pesticides, phosphates and nitrates in surface and groundwater. It is apparent that most of the horticultural farms in Northern Tanzania are located on gently sloping land adjacent to water bodies. Thus discharges of wastewaters from horticulture farms may affect the quality of water resources through run-off and groundwater through infiltration if proper management of the agrochemicals is not well adhered to. The agrochemicals that have been widely used and identified as potential environmental pollutants from their use as horticultural chemicals are reviewed. The potentially adverse impacts of these agrochemicals to water resources are discussed. The review concludes with a discussion of the directions for further investigation.

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Pesticide residues in water from TPC sugarcane plantations and environs, Kilimanjaro region, Tanzania

Abstract: ABSTRACT

Cited by 13 publications

References 0 publications

Contamination by organochlorine pesticides in the aquifer of the Ring of Cenotes in Yucatán, México

Contamination by organochlorine pesticides in the aquifer of the Ring of Cenotes in Yucatán, México

Quantification of micropollutants in some water sources in northern Tanzania

Agrochemicals use in horticulture industry in Tanzania and their potential impact to water resources

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