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Level of Contamination of Fishponds Water in Pesticide Residues and metallic trace elements (Pb, Cd, As, Hg): Case of Fishponds of ZEPREGUHE (Daloa, Côte d’Ivoire)

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Journal of Agricultural Chemistry and Environment 2022年第4期11卷 307-317页

作者： Kacou Alain Paterne Dalogo Ano Guy Serge Ehouman James Halbin Kouadio David Leonce Kouadio Edi Jean Frejus Ehui Karim Sory Traore Laboratory of Environmental Sciences and Technology Jean Lorougnon GUEDE University Daloa C&ocirc te d’Ivoire Laboratory of Environmental Sciences Nangui Abrogoua University Abidjan C&ocirc te d’Ivoire Agroforestry Training and Research Unit Biochemistry-microbiology Department Agrovalorisation Laboratory Jean Lorougnon GUEDE University Daloa C&ocirc te d’Ivoire

Fishponds waters intended to satisfy the nutritional needs of the populations in terms of supply of fish resources are strongly and unfortunately exposed to the mobility and dispersion of metallic trace elements (TMEs) or to the persistence in the environment and in the form of pesticide residues from human activities. The objective of this work is to evaluate, on the one hand, the levels of identified pesticide residues and, on the other hand, those of researched TMEs (lead, cadmium, mercury and arsenic) in the waters of ponds used for fish farming in Zépréguhé, a locality located 9 km from the town of Daloa in the centre-west of Côte d’Ivoire. The dosage of the samples carried out by means of a gas chromatograph coupled to a mass spectrometer (GC/MS) made it possible to detect nine (9) pesticide molecules, including eight (8) organochlorines and a single molecule from the pyrethroid family, obtained from the detection limit of 0.006 μg/L and the quantification limit of 0.018 μg/L. The maximum average concentration was obtained with α-endosulfan for a content reaching 0.8038 μg/L and well above the maximum admissible concentration of 0.1 μg/L. The TMEs were quantified using an atomic absorption spectrophotometer (AAS). Arsenic is the most abundant metal with an average concentration of 9.497 μg/L. With the exception of lead, these measured levels are above the acceptable limit values for freshwater. This study showed that human activities such as the use of fertilisers and plant protection products in plantations, sand extraction and road traffic have a negative impact on the quality of the water in ponds used for fish breeding.

关键词： Fishpond Water metallic trace elements Pesticide Residues Maximum Residue Levels

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Predictive Study of trace Metal Pollution of Gold Panning Sites in Birimian Formations: Case of the Yaouré Furrow (Côte d’Ivoire)

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Open Journal of Applied Sciences 2024年第7期14卷 1691-1714页

作者： Tonga Paul Tiemoko Gbele Ouattara Kouassi Ernest Ahoussi Laboratoire des Sciences Gographiques du Gnie Civil et des Gosciences Institut National Polytechnique Flix Houphout-Boigny (INP-HB) Yamoussoukro Cte dIvoire Laboratoiredes Sciences du Sol delEauetdes Gomatriaux Universit Flix Houphout-Boigny (UFHB) Abidjan-Cocody Cte dIvoire

The present study was carried out on small-scale gold mining sites in the Yaouré region of Côte d’Ivoire. This region is geologically representative of the Birimian formations (2.1 Ga) of West Africa. The aim is to determine the potentially toxic trace metals (TMEs) generated by these sites, with a view to preventing possible contamination and/or metal pollution of the waters that provide fish products for local populations. To this end, a sampling campaign was carried out, resulting in the collection of 20 mining waste samples analyzed by X-ray fluorescence spectrometry (XRF) and 10 by X-ray diffractometer (XRD). The XRF analysis detected 06 predominant TMEs: arsenic, chromium, copper, nickel, zinc and vanadium. Statistical analysis was carried out to determine the distributions and correlations between these ETMs. To assess contamination and/or pollution levels, the following indices were calculated on the basis of reference concentrations of upper continental crust MTEs: Enrichment Factor, Geo-accumulation Index, Concentration Factor, Degree of contamination and those related to ecological risks. The results of statistical analyses and indices have shown that arsenic and chromium are the most predominant and can be, depending on the chemical form, potentially more toxic. The results of the DRX analysis show the occurrence of several minerals carrying these two MTEs, especially that of a rare mineral, Stenhuggarite, an arsenic oxide linked to hydrothermal veins. The majority of gold mining operations in West Africa are located in the birimian zone, hence the need for environmental monitoring by the relevant authorities, to prevent potential ecological risks to water and possibly health risks via the food chain.

关键词： Small-Scale Mining metallic trace elements Mining Discharges Contamination Pollution Contamination Pollution Index

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Assessment of the Quality of Sediments and Agricultural Soils: Case of the Ity-Floleu Area in the Prefecture of Zouan-Hounien, Western Côte d’Ivoire

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Journal of Geoscience and Environment Protection 2020年第12期8卷 255-275页

作者： Konan Kouakou Séraphin Gbamélé Kouassi Serge Doffou Richard Jean Olive Brou Loukou Alexis Kouassi Kouakou Lazare Dongui Bini Kouamé Laboratory of Geosciences and Environment University Jean Lorougnon Guede Daloa C&ocirc te d’Ivoire Departement of Geology University Jean Lorougnon Guede Daloa C&ocirc te d’Ivoire

The objective of this study is to assess the level of metal contamination of sediments and agricultural soils in the Ity-Floleu zone. The concentrations of trace elements (Fe, Mn, As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) were measured in different seasons over two successive years. The sediment pollution index made it possible to note that the sediments and agricultural soils of the various stations studied are highly polluted in all seasons. The calculation of the geoaccumulation index indicates that surface water sediments most often experience extreme or moderate pollution in As, Cd, Cu, Hg and Zn in the dry or rainy season except in Pb in some cases. We observed that the sediments of the Cavally river present a serious pollution due to extreme anthropic activities carried out along the river. Over the entire region, the results of the potential ecological risk index (RI) indicate that all the sediments and agricultural soils analysed present a moderate ecological risk in terms of Pb and Zn in certain cases and an ecological risk is observed low bound to other metals in all seasons. This metallic pollution generated by human activities in this region can have consequences for the environment and biodiversity.

关键词： Anthropogenic Activities Cavally River Contamination Factors Contamination Indices metallic trace elements Sediments and Agricultural Soils

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Distribution and Mobility of Zn,Pb and Cd in a Sewage Sludge-Amended Soil

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Open Journal of Soil Science 2013年第8期3卷 347-355页

作者： Dominique Proust Vivien Mathe Francois Leveque LIENSs UMR 7266 CNRS-Universite de La Rochelle La RochelleFrance

The distribution of the metallic trace elements (MTE) Zn, Pb and Cd in a sludge-amended soil and their partitioning in specific soil microystems are studied by comparing their contents in amended and control soils. This comparison is achieved at the metric scale of the bulk soil horizons and at the micrometric scale of the weathering microsites (weathering rock-forming minerals and their specific weathered products). The chemical analyses of the MTE in the bulk samples do not show any anthropic contamination of the amended soil with repeated sewage sludge spreading. The chemical analyses of the

关键词： Soil metallic trace elements Heavy Metals Clay Minerals

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Lixiviation of Open-Coast Dumping Site and Pollution of Water and Soils of Edea Industrial Zone（Littoral-Cameroon）

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Journal of Environmental Science and Engineering(B) 2013年第5期2卷 289-298页

作者： Noa Tang Sylvie Nguene Feudoung Daniel Etame Jacques Bayiga Elie Constantin Bilong Paul Department of Earth Sciences Faculty of Sciences University of Douala Douala 24157 Cameroon Department of Earth Sciences Faculty of Sciences University of Yaounde I Yaounde 812 Cameroon

The nexus between water, food and energy is one of the most fundamental relationships and challenges for society. Indeed, seepage of wastes stored into dumping sites of Edea township, favor their lixiviation. Soluble components of matter are slowly dissolves, drained by meteoric water and flowed into tail bay vicinity. Knowledge of trace and toxic metal concentrations in the biotic matrices is important for assessing the effects of pollutants and the risk of exposure. In this study, A1, Mn, Cd, Cr, Cu, Pb and Zn were quantified respectively in 33 samples of soil and water, using ICP-MS （Inductively Coupled Plasma Mass Spectrometry）, Pb were found between 1.38-88.28 mg/L. Higher concentrations of Al were found in Alucam industrial wastes （315,502.33 mg/kg）, and in Hysacam domestic wastes （54,126.93 mg/kg）. Concentrations of Cd （1.955 mg/kg）, Pb （469.00 mg/kg） and Zn （853.00 rng/kg） are higher in domestic wastes. The ones of Mn （696.96 mg/kg） and Cu （1,320.10 mg/kg） are higher in industrial wastes. Higher concentrations of Pb and Cu let assume that it is a risk of poisoning relative to these elements around this area. These findings illustrate that lixiviation of dumping wastes has great influence on water and soils pollutions of the study ecosystem.

关键词： Dumping site lixiviation metallic trace elements pollution chemical intoxications

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Impending Pollution of Betare Oya Opencast Mining Environment （Eastern Cameroon）

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Journal of Environmental Science and Engineering(B) 2015年第1期4卷 37-46页

作者： Tehna Natanael Nguene Feudoung Daniel Etame Jacques Medza Ekodo Jean Marc Noa Tang Sylvie Sub Emmanuel Cheo Bilong Paul Department of Earth Sciences Faculty of Sciences University of Douala Douala 2415 7 Cameroon Department of Earth Sciences Faculty of Sciences University of Yaounde 1 Yaounde 812 Cameroon Department of Mines Ministry of Mines lndustry and Technological Development Yaounde 70 Cameroon Seismology Laboratory of Ekona Geophysics and Volcanic Research Department Institute of Mining and Geological ResearchBuea 370 Cameroon Department of Geology and Environmental Science Economic Geology Unit University ofBuea Buea 63 Cameroon

Mining resources are offered by the natural milieu and liable to exploitation. Raw materials extracted are essential for jewellery and economy. But in most cases, the environmental impact assessment is disappointing. In this study conducted at Betare Oya, mining residues are directly disposed in the immediate environment without passing through the tailing ponds for treatment, despite environmental laws and standards. Soluble components of matter are slowly dissolved, drained by meteoric water and flowed into tail bay vicinity. Soil and mining residues were sampled in Mari, Mbigala, Mboufa and Bedobo, respectively, four sub-watershed of Lom, the main river of the region. Concentration of nine MTE （metallic trace elements）： As, Cd, Cr, Cu, Co, Ni, Pb, Zn and Hg were determined by ICP-MS （inductively coupled plasma-mass spectrometry）. Highest concentrations of trace and toxic metals in soil and mining residues are： Cr （210 mg·kg-1）〉 Zn （136 mg·kg-1）〉 Ni （64 mg·kg-1）〉 As （34 mg·kg-1）〉 Cu （30 mg·kg-1）〉 Pb （25 mg·kg-1）〉 Co （17 mg·kg-1）〉 Cd （0.5 mg·kg-1）〉 Hg （0.1 mg·kg-l）, respectively. These results let assume that it is a risk of environmental pollution and poisoning relative to these elements around Betare Oya opencast mining area, with impact on human health.

关键词： Mining mounds mining residues pollution metallic trace elements toxicology.

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Chemical Composition Assessment by Wavelength Dispersive X-Ray Fluorescence of Agricultural Soils in the Mining Town of Moanda, Gabon

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Journal of Agricultural Chemistry and Environment 2021年第3期10卷 345-358页

作者： Albert Novy Messi Me Ndong Adam Bouraïma Crislain Bissielou Jean-Jacques Anguile Thomas Makani Laboratoire de Chimie des Matériaux Inorganique Université des Sciences et Techniques de Masuku Franceville Gabon

This work focuses on the analysis of the chemical composition of soils dedicated to agriculture in order to assess the impacts of manganese mining activity in the city of Moanda in South-East Gabon. The result of the analysis obtained using wavelength dispersive X-ray fluorescence revealed the presence of twenty-seven elements in the seventeen soil samples collected namely: Na, K, Rb, Mg, Ca, Sr, Ba, Ti, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Cr, Mn, Al, O, C, P, S, Si, I, Ac and Th. Iron (Fe), aluminum (Al) and manganese (Mn) were respectively higher. The practice of agriculture near mining sites is not without risks for the quality of agricultural products and the health of the population.

关键词： metallic trace elements X-Ray Fluorescence Agricultural Soils

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