Copper, lead and cadmium concentrations in surface water, sediment and fish, C. Carpio, samples from Lake Naivasha: effect of recent anthropogenic activities

Mutia, T. M.; Virani, Munir Z.; Moturi, W. N.; Muyela, B.; Mavura, W. J.; Lalah, Joseph O.

doi:10.1007/s12665-012-1556-8

Cited by 47 publications

(44 citation statements)

References 22 publications

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“…The Malewa River is a long channeling river from the Kinangop catchment area where the channel is marked by increased agricultural activities, population growth, and urbanization (Ndungu et al 2015). Thus the high concentrations could be the result of contamination by upstream natural processes, human activities like industrial and domestic waste disposal, and other possible contamination sources such as run‐off from sewage‐based fertilizer deposited on agricultural lands in its catchments (Mutia et al 2012; Faure et al 2015). Moreover, the high concentration at Malewa gives an indication of the relative importance of microplastic input through tributaries and rivers from terrestrial environments into our inland aquatic ecosystems and consequently into oceans.…”

Section: Resultsmentioning

confidence: 99%

Occurrence and Spatial Distribution of Microplastics in the Surface Waters of Lake Naivasha, Kenya

Migwi

Ogunah

Kiratu

2020

Enviro Toxic and Chemistry

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Microplastics are emerging threat contaminants that have been shown to provide toxic pollutants, either from the environment or from their inherent toxic monomers and additives, a pathway into the aquatic food web. In the present study, the occurrence, abundance, and composition of microplastic load in the surface water of Lake Naivasha (Kenya) was determined. The surface water physicochemical parameters were measured in situ; microplastic samples were collected using plankton net trawls and treated with H2O2 to decompose organic matter. The microplastic particles recovered were classified both by visual observation and by attenuated total reflection–Fourier transform infrared spectroscopy. The average microplastic concentration range in surface water was 0.183 ± 0.017 to 0.633 ± 0.067 particles/m2, with the mean concentration being 0.407 ± 0.135 particles/m2. Fragments, fibers, and films were identified and were mostly composed of polypropylene, polyethylene, and polyester. We also performed correlational analysis, which showed a strong positive association between microplastic quantity and turbidity, total nitrogen, and total phosphorus in the lake. The high variability in microplastic densities exhibited between the sampled locations was attributed to human activities, water and wastewater intake through rivers and tributaries, and the presence of local wind patterns responsible for the general water circulation. Our assessment adds to the growing documentation of microplastic presence in freshwater ecosystems, and provides a baseline for future monitoring and assessment in sediment and biota of Lake Naivasha and other Kenyan freshwater systems. Environ Toxicol Chem 2020;39:765–774. © 2020 SETAC

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Section: Resultsmentioning

confidence: 99%

Occurrence and Spatial Distribution of Microplastics in the Surface Waters of Lake Naivasha, Kenya

Migwi

Ogunah

Kiratu

2020

Enviro Toxic and Chemistry

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“…The forest clearance has led to increased soil erosion and transport of nutrients into the lake [10]. High volumes of fertilizers, pesticides and effluents produced by the Naivasha floricultural industry have been blamed for the large rise in Pb, Cd and Cu levels observed in the waters of Lake Naivasha [23,24]. These pollutants have been found in high concentrations in fish tissues and have accumulation effects on the food chain [24].…”

Section: Human Populationmentioning

confidence: 99%

An Overview of the Current Status of Lake Naivasha Fishery: Challenges and Management Strategies

Njiru¹,

Waithaka²,

Aloo³

2017

TOFISHSJ

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Lake Naivasha a shallow, freshwater body and a Ramsar site is found in the eastern arm of the Kenyan Rift Valley. This paper used published, unpublished and analyzed data to assess the status, challenges and management options for the fishery. Lake Naivasha fishery is based on exotic species that fluctuates depending on fishing regime, lake water level and aquatic plant concentrations. The fishery has been dominated by different species with the current catch contribution consisting mainly of common carp, Cyprinus carpio, Nile tilapia, Oreochromis niloticus, blue-spotted tilapia, O. leucostictus and African catfish, Clarias gariepinus. The minimum and maximum catch of 21 t yr -1 and 1181 t yr -1 was reported in 1997 and 2015, respectively. The main threats to the lake fishery are anthropogenic influences emanating from within the lake and its basin. The factors include intense fishing, exotic species introductions, water abstraction, lake level fluctuations, wetland utilization, eutrophication, and land degradation. There are also several conflicts of interest amongst the stakeholders in agriculture, fisheries, wildlife, tourism, conservation and geothermal electricity generation. There is fear that if the current trend persists, the lake and its fishery may be headed for extinction. The management measures instituted in the lake do not seem to have arrested reduction in fish catches nor reversed deterioration in water quality. For sustainable utilization of Lake Naivasha and its fishery, there is a need to consider a holistic ecosystem approach of the basin management. Additionally, all the relevant stakeholders should be involved in formulation and implementation of the decisions to manage the fishery.

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“…The observed concentration ranges of individual toxic metals in the bottom sediments of water bodies in the Upper Silesia region (181.7-35200.0 ppm for zinc, 33.3-1648.8 ppm for lead, 1.8-359 ppm for cadmium, 14.0-271.5 ppm for copper, 45.3-167.5 ppm for chromium, and 12.0-128.5 ppm for nickel) should be considered spectacular or, at a minimum, rarely found, taking into account the results of comparable studies conducted in other parts of the world (Dauvalter, 1994;Khan et al, 1995;Szymanowska et al, 1999;Lindström and Håkanson, 2001;Magiera et al, 2002;An and Kampbell, 2003;Ikem et al, 2003;Kosov et al, 2004;Wang et al, 2004;Nguyen et al, 2005;Roach, 2005;Duman et al, 2007;Gantidis et al, 2007;Ochieng et al, 2007;Ongeri et al, 2009;Baek and An, 2010;Mutia et al, 2012;Hahladakis et al, 2013;Jagus et al, 2013).…”

Section: Comparison With Literature Datamentioning

confidence: 99%

“…These include the African Lake Naivasha, where lead concentrations in sediments do not exceed several dozen ppm and those of cadmium and copper are below 10 ppm (Mutia et al, 2012). In several other lakes in the region (Lake Nakuru, Lake Bogoria, Lake Elementatia, Lake Baringo), and also in Lake Victoria, which is the largest in Africa, the concentration of lead is below 100 ppm and that of cadmium below 10 ppm; in the sediments of Lake Victoria, only copper was found in concentrations of up to 100 ppm (Ochieng et al, 2007).…”

Section: Comparison With Literature Datamentioning

confidence: 99%

Assessment of Toxic Metal Contamination of Bottom Sediments in Water Bodies in Urban Areas

Rzętała

2014

Soil and Sediment Contamination: An International Journal

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A study was carried out on 20 water bodies of the same origin in southern Poland. The study objectives included the assessment of toxic metal contamination in the bottom sediments of the water bodies in comparison with the geochemical background and sediments found in the substrate (i.e., vicinity) of the water bodies (i.e., the formations present in the surroundings of the water body itself), thus demonstrating the scale of anthropogenic enrichment of bottom sediments with toxic metals and assessing the cumulative impact on water bodies. The following amounts of toxic metals were found in the bottom sediments of the water bodies examined: 181.7-35200.0 ppm for zinc, 33.3-1648.8 ppm for lead, 1.8-359 ppm for cadmium, 14.0-271.5 ppm for copper, 45.3-167.5 ppm for chromium, and 12-128.5 ppm for nickel. Ratios of the values measured to the geochemical background were as follows: 0.7-135.9 (Zn), 0.6-53.0

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Copper, lead and cadmium concentrations in surface water, sediment and fish, C. Carpio, samples from Lake Naivasha: effect of recent anthropogenic activities

Cited by 47 publications

References 22 publications

Occurrence and Spatial Distribution of Microplastics in the Surface Waters of Lake Naivasha, Kenya

Occurrence and Spatial Distribution of Microplastics in the Surface Waters of Lake Naivasha, Kenya

An Overview of the Current Status of Lake Naivasha Fishery: Challenges and Management Strategies

Assessment of Toxic Metal Contamination of Bottom Sediments in Water Bodies in Urban Areas

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