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geogenic Imprint on Groundwater and Its Quality in Parts of the Mamfe Basin, Manyu Division, Cameroon

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Journal of Geoscience and Environment Protection 2019年第5期7卷 184-211页

作者： Richard Ayuk II Akoachere Thomson Areapkoh Eyong Sonia Ebot Egbe Regina Engome Wotany Michael Obiekwe Nwude Omagbemi Omoloju Yaya Department of Geology University of Buea Buea Cameroon National Water Resources Institute Kaduna Nigeria

Groundwater studies in parts of the Mamfe basin are sparse and the Mamfe area has the highest population density in the Mamfe basin. An in-depth study of groundwater rock interaction and groundwater quality is of vital importance. This same part of the basin is the economic centre and as such development of businesses in this area requires knowledge of the groundwater quality. Therefore, this study was undertaken to determine the input of the rock formations on the groundwater solute chemistry and groundwater domestic-agro-industrial quality using hydrogeochemical tools and physicochemical parameters: Ionic ratios, Gibbs diagrams, Piper diagrams, Durov diagrams and water quality indices. From physicochemical parameters, in the rainy season, pH ranged from, 4.3 - 8.6;EC, 3 - 1348 μS/cm;Temperature, 24.4℃ - 30.1℃? andTDS, 2.01 - 903.16 mg/L and in the dry season, pH ranged from 5.5 - 9.3;EC, 6 - 994 μS/cm;Temperature, 25℃?- 38.6℃?andTDS, 4.02 - 632.48 mg/L. Forty groundwater samples: 20 per season, wet and dry were analysed. The major ions fell below WHO acceptable limits for both seasons. The sequences of abundance of major ions were: Ca2+ > K+ > Mg2+ > ?> Na+, Cl- > ?> ?> ?> NO3 in wet season and Ca2+ > Mg2+ > K+ > Na+, ?> Cl- > ?> ?> ?in dry season. Ion-exchange, simple dissolution and uncommon dissolution processes determined groundwater character. Groundwater ionic content was as a result of ion exchange from rock-weathering. Water types are: CaSO4 and MgHCO3 in both seasons. Hydrogeochemical facies are Ca-Mg-Cl-SO4 and Ca-Mg-HCO3. SAR for wet season 0.05 - 0.06 and dry season 0.00 - 0.05, %Na wet season 3.64 - 16.59 and dry season 1.22 - 10.97, KR wet season 0.01 - 0.02 and 0.00

Application of Multivariate Statistic of U, Th and Pb Concentrations and Pb Isotopic Signatures in the Assessment of geogenic and Anthropogenic Sources in a U-Mineralized Area

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Journal of Geoscience and Environment Protection 2019年第6期7卷 1-12页

作者： Adriana Monica Dalla Vecchia Jorge Carvalho de Lena Ana Claudia Queiroz Ladeira Center for Development of Nuclear Technology Belo Horizonte Brazil Department of Geology Federal University of Ouro Preto Ouro Preto Brazil

This work presents a Principal Component Analysis (PCA) study using Pbisotope signatures and U, Th and Pb concentrations from groundwater, sediments and rocks (granites and orthogneisses) of the Complex of Lagoa Real (Bahia, Brazil). This area is naturally enriched in U and Th, with the occurrence of Pb derived from the radioactive decay of the elements (238U, 235U and 232Th) in the form of their stable isotopes 206Pb, 207Pb and 208Pb in addition to the natural isotope 204Pb. Sampling was carried out in the rainy season (December to January) and the points were selected according to regional hydrology and geology. Thirty samples were analyzed: 12 of groundwater (AP) and 18 of sediments (S). The results show that the use of isotopic ratios allows discrimination between geogenic and anthropogenic samples. This information is not obtained using only the analysis of concentration data. Statistically, the isotopic data of Pb stand out as an efficient tool in the characterization of sources in the scenario investigated, allowing an effective environmental monitoring and a better management of the mining activities.

关键词： Environmental Monitoring Statistical Analysis Lead Stable Isotopes Anthropogenic Sources geogenic Sources

Achieving Sustainable Use and Management of Water Resources for Irrigation in Nigeria

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Journal of Environmental & Earth Sciences 2020年第2期2卷 47-55页

作者： Moses Oghenenyoreme Eyankware Ezekiel Obinna Igwe Christopher Ogwah Ruth Oghenerukevwe Eyankware Ulakpa Department of Geology Ebonyi State UniversityAbakaliki Ebonyi State Nigeria Geo-Moses Consultancy Limited.Warri Delta State Niaeria Department of Environment Management and Pollution Control Nigeria Maritime UniversityOkerenkokoDelta StateNigeria

Water resource is available in Nigeria to meet water demand for domestic,agricultural and industrial *** well enhanced and protected from various source of ***,less information is available on suitability of water resources for irrigation use in *** article reviews literature of the past with regards to influence of geogenic and anthropogenic activities on water resource for irrigation purpose in Nigeria and also to explain the current state of suitability of water resource for irrigation studies in Nigeria and gaps in *** also summarizes future ways on water resource management and preventive measure for water resource pollution for irrigation *** articles were downloaded from Google scholar in water-related *** paper tends to review previous article on water resource in Nigeria,and its suitability for *** primary aim of this paper is to produce a synoptic overview of the water resources in Nigeria and its suitability for irrigation *** paper reviewed it was observed that 89%of water resources was considered suitable for irrigation.

关键词： geogenic Anthropogenic Irrigation indices Suitability and Nigeria

A Comprehensive Review of Water Quality Monitoring and Assessment in Delta State,Southern Part of Nigeria

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Journal of Environmental & Earth Sciences 2021年第1期3卷 16-28页

作者： Moses Oghenenyoreme Eyankware Bassey Edem Ephraim Department of Geology Ebonyi State University Abakaliki P.M.B.053 Ebonyi StateNigeria Geomoses Consultancy Limited Warri DeltaNigeria Department of Geology University of CalabarP.M.B.1115CalabarCross River StateNigeria

This research presents a review on water resources in Delta state,southern part of Nigeria,with emphasis on hydrogeochemical and microbial *** evaluates factors responsible for water contamination,and their resulting health challenges within the study *** achieve the objective of this study,related articles were downloaded from Google,published article on influence of hydrogeochemical and microbial activities on water *** articles were thoroughly *** from this study,suggested that groundwater was more studied than surface wa*** also observed that groundwater within the riverine communities is much more prone to pollution when compared to groundwater in an upland *** from various authors suggested that,larger percentage of groundwater showed presence of *** findings suggested that geochemical processes such as rock water interaction,seawater intrusion and precipitation influences groundwater quality within the study area especially within Sombreiro-Warri Deltaic Plain Deposit.

关键词： geogenic Anthropogenic Hydrogeochemical Cause of pollution Coliform Nigeria

Comparative Assessment of Heavy Metals Pollution in Surface Water in Ikoli River and Epie Creek in Yenagoa Metropolis Using Geographical Information System

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Journal of Geographical Research 2022年第3期5卷 49-62页

作者： Egai Ayibawari O. Edirin Akpofure Digha Opaminola Nicholas Department of Geology Niger Delta UniversityBayelsa StateNigeria Department of Geography Jasper Boro College of Education SagbamaNigeria

The article is the investigation of heavy metals pollution on surface water in Ikoli River and Epie creek in Yenagoa,metropolis,Bayelsa ***,Cd,Ni,Cr,Fe,Zn was determined and evaluated using Geographical Information *** concentration was below the permissible limit of 3 mg/L in all the locations *** is 77.78%below the limit of WHO 2011 of 0.3 mg/L while other heavy metals examined in Ikoli River and Epie creek are highly *** pollution index for contamination index shows 11.11%sample are high and 88.89%are low while the evaluation of heavy metal index and the pollution index load of the heavy metals contain 22.11%of the sample are low and 77.78%are high which imply the Ikoli River and Epie creek is *** treatment of the result revealed a good correlation between the PCA and HCA,which showed activities of natural processes and man influenced environmental sources of the heavy metals which were mainly products of automobiles exhaust,water tank leakages as well as dumping of radioactive wastes and *** study investigated successfully the potential use of GIS with the help of multiple criteria decision analysis to predict and characterize areas of high pollution,medium,and low pollution in the study area.

关键词： Multivariate treatment GIS Pollution index Anthropogenic geogenic Ikoli river Epie Creek