Geochemistry, chemical speciation and environmental impact of trace and rare earth elements - Sikakwe, Gregory
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The study of hydrogeochemical processes, chemical speciation using rare earth elements done using groundwater samples in Oban Massif and Mamfe Embayment southeastern Nigeria. Water samples were collected from boreholes, streams, springs and river sources. Physical parameters such as hydrogen ion index (pH), redox potential (eH), electrical conductivity (EC), total dissolved solids (TDS) and turbidity) were measured insitu using standard equipment. Anions such as nitrate (NO3-), sulfate (SO42-), bicarbonate (HCO3-), phosphate (PO43-), and chloride ( Cl-) were measured in the laboratory using…mehr

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Produktbeschreibung
The study of hydrogeochemical processes, chemical speciation using rare earth elements done using groundwater samples in Oban Massif and Mamfe Embayment southeastern Nigeria. Water samples were collected from boreholes, streams, springs and river sources. Physical parameters such as hydrogen ion index (pH), redox potential (eH), electrical conductivity (EC), total dissolved solids (TDS) and turbidity) were measured insitu using standard equipment. Anions such as nitrate (NO3-), sulfate (SO42-), bicarbonate (HCO3-), phosphate (PO43-), and chloride ( Cl-) were measured in the laboratory using titration and chromatography, major cations (magnesium,(Mg2+), calcium (Ca2+), potassium (K+), sodium (Na+)) were analyzed using inductively coupled plasma argon emission spectrometry while trace and rare earth elements were assayed using inductively coupled plasma mass spectrometry. Chemical speciation modeling for solution complexation and saturation indices was done using the software VISUAL-MINTEQ 3.1. In surface water both light and heavy rare earth elements minerals of phosphate ligand were supersaturated.
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Autorenporträt
O Dr. Gregory Udie Sikakwe obteve uma licenciatura em Geologia em 1998, um mestrado em Geociências Ambientais em 2010 e um doutoramento em Geociências Ambientais e Estudos da Poluição em 2014, todos pelo Departamento da Universidade de Calabar, Calabar. Iniciou a sua carreira de docente na Universidade Federal Alex Ekwueme, na categoria de Docente II, em 2015