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252 results for “Metals”
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Research ArticleOpen accessEvery word in the titleEnvironmental Pollution by Heavy Metals in the Gold Mining Region of East CameroonDallou Guy Blanchard, Ngoa Engola Louis, Abdourahimi et al.The main objective of this study is to assess the level of heavy metals pollution in soil samples collected around gold mines located in Betaré Oya (BO) and Batouri (BA) in Eastern Cameroon. Elemental analysis of soil samples was carried out using Quant´X EDXRF spectrometer. Its sensitivity and accuracy were increased by using the Fundamental Parameter approach for quantification of … …American Journal of Environmental Sciences, Vol. 14, Issue 5 · 7 Nov 2018 · 9,777 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRemediation of Heavy Metals by using Industrial Waste by Products in Acid Mine DrainageNuur Hani Mohammed, Mustapha Atta, Wan Zuhairi Wan YaacubAcid Mine Drainage (AMD) is one of the main important problems being combated today. Laboratory tank experiments were conducted to evaluate the use of industry waste to adsorb and control the mobilization of metals from contaminated acid mine water. The main physical conditions such as pH and treatment performance are displayed. The solution of acid mine were sampled from the … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 4 · 18 Dec 2017 · 7,342 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Heavy Metals on the Enzymatic Activity of Haplic Chernozem under Model Experimental ConditionsNatalia Gromakova, Saglara Mandzhieva, Tatiana Minkina et al.The biological activity of soils is an essential parameter of their ecological status. The anthropogenic Heavy Metals (HMs) disturb the normal functioning of soil biota and, hence, the entire soil system. The aim of this work was to estimate the toxicity of loosely bound HM compounds in Haplic Chernozem using parameters of cellulose-degrading and urease activities. Contamination of Haplic Chernozem … …OnLine Journal of Biological Sciences, Vol. 17, Issue 3 · 23 Jul 2017 · 7,994 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRisk Assessment of Heavy Metals in Fish in Saudi ArabiaOthman M. HakamiHeavy metals such as arsenic, cadmium, mercury and lead constitute a serious threat to human health. Generally, regular consumption of fish is recommended because it is a good source of omega-3 fatty acids, which have been associated with health benefits. However, flesh of some fish species contains heavy metals in high concentration, which may pose health risk for individuals that … …American Journal of Environmental Sciences, Vol. 12, Issue 6 · 3 Dec 2016 · 8,702 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSelected Heavy Metals as Indices of Atmospheric Pollution in African Locust Bean (Parkia biglobosa) Tree BarksOlatunde S. Olatunji, Oladele Osibanjo, Olalekan S. Fatoki et al.Metallurgical industries are pollution “hot spots” for emission of dust, particulates of heavy metals and gaseous contaminants at levels that can be injurious to man and environment. The atmospheric levels of selected heavy metals around Ajaokuta Steel Company Nigeria were assessed using barks of Parkia biglobosa trees. The tree barks were randomly collected during wet and dry seasons, sorted and … …American Journal of Environmental Sciences, Vol. 12, Issue 1 · 2 Mar 2016 · 7,810 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleUtilization of Sewage Sludge in Agricultural Soil as Fertilizer in the Republic of Benin (West Africa): What are the Risks of Heavy Metals Contamination and Spreading?Fidèle Suanon, Lyde A.S. Tomètin, Biaou Dimon et al.Biosolids are the treated organic residuals, also known as sewage sludge, which are generated from domestic wastewater treatment plants. It is an organic matter and nutrients [phosphorous (P) and nitrogen (N)]-rich material. Due to these properties, it is has been reported to be a suitable fertilizer or soil amendment which can valuably replace synthesized NPK. Unfortunately, this matter is heavily … …American Journal of Environmental Sciences, Vol. 12, Issue 1 · 6 Jan 2016 · 14,496 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSpecific Features of the Accumulation and Distribution of Heavy Metals in Soils of the Floodplain and Deltaic Landscapes of the Don RiverTatiana M. Minkina, Dina G. Nevidomskaya, Yuriy A. Fedorov et al.The purpose of this work was to study specific features of the accumulation and distribution of the total content and mobile forms of Heavy Metals (HM) in soils of the estuarine ecosystems of the floodplain and deltaic landscapes of the Don River. The results allowed us to detect regional specific features in the formation of HM compounds in floodplain soils … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 19 Nov 2015 · 6,586 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSorption Extraction of Noble and Non-Ferrous Metals from Process Leaching SolutionsBagdaulet Kenzhalyevich Kenzhaliyev, Renata Ramilevna Iskhakova, Zamzagul Duisenovna DosymbayevaIn view of the annual increase in ore processing output for low grade or refractory gold-bearing ores, as well as recoverable raw materials, stricter requirements for completeness of gold extraction and environmental safety, the interest is rising in possible alternatives to substitute the cyanide process used in gold mining practice. One of such alternatives is to convert metals into solutions … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 18 Nov 2015 · 7,050 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSupercritical CO2 Extraction of Heavy Metals Cu, Zn and Cd from Aqueous Solution using D ithizone as Chelating AgentJeton Halili, Altin Mele, Tahir Arbneshi, Ilir MazrekuMetal ions in liquid samples can be extracted by supercritical CO2, containing a suitable ligand. This paper presents the first experimental data for the extraction of three heavy metals Cu, Zn and Cd from aqueous samples in the presence of Dithizone as chelating agent. Extractions by supercritical CO2 have been performed at 120 bars with 50°C used dynamic technique. After … …American Journal of Applied Sciences, Vol. 12, Issue 4 · 22 Jun 2015 · 7,306 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleStudy of Heavy Metals in the Surface Sediments of the Main Wadis in the Region of Meknes-MoroccoA. Lammini, A. Dehbi, H. Omari, A. AbdallaouiBecause of their growing demographic and industrial expansion, the urban areas of the city of Meknes are likely to disturb the ecological balance of watercourse. In the present work, we had evaluate the degree of sediment’s contamination by heavy metals (Al, Cd, Cu, Fe, Mn, Pb and Zn) in the main wadis of the Meknes region (Boufekrane, Wislane and Toulal) … …Current Research in Geoscience, Vol. 4, Issue 2 · 29 Apr 2015 · 7,109 accessesView PDFCite