Impact of mine tailings on surrounding soils and ground water: Case of Kettara old mine, Morocco

Amari, Khalid; Valera, Paolo; Hibti, Mohamed; Pretti, S.; Marcello, A.; Essarraj, Samira

doi:10.1016/j.jafrearsci.2014.07.017

Cited by 66 publications

(16 citation statements)

References 13 publications

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“…El sector industrial Explotación de minas y canteras es una de las actividades humanas responsables de la contaminación de los suelos en grandes áreas del mundo, no obstante, en Costa Rica su explotación es altamente regulada, requiriéndose un Estudio de Impacto Ambiental antes de iniciar cualquier proyecto de este tipo. Los desechos de las minas ocasionan drenajes de ácidos y sólidos que pueden liberar metales como Cu, Mn, Fe, Zn, Ni, Mo, B y Cl, los cuales son esenciales para las plantas; así como otros elementos que son beneficiosos para algunas especies vegetales, tal cual es el caso de Al y Ti; sin embargo, a grandes concentraciones, son tóxicos y perjudiciales [14], [15]. Según la figura 3, la Explotación de minas y canteras genera una gran afectación al subcomponente Humano, debido principalmente al impacto social ocasionado por el limitado empleo que genera esta actividad y al impacto cultural generado por la alteración al paisaje que ocasiona la minería, que generalmente se desarrolla en zonas rurales provocando un desequilibrio en la textura del paisaje existente.…”

Section: Resultados Y Discusiónunclassified

Impacto ambiental de diferentes sectores productivos de Costa Rica

Arce-Villalobos¹,

Arias-Castro²,

Hernández-Ugalde³

et al. 2021

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La Evaluación de Impacto Ambiental (EIA) consiste en la identificación y valoración de los impactos potenciales de proyectos respecto a los componentes físicos, químicos, biológicos, culturales, económicos y sociales, con el fin de que mediante la planificación y la correcta toma de decisiones se desarrollen aquellas actuaciones más compatibles con el ambiente. Además, representa un mecanismo acondicionado a la realidad global actual, que permite el control y seguimiento de la gestión ambiental de forma integral. A pesar de ser una temática ampliamente desarrollada, en múltiples ocasiones su aplicación no es comprendida a plenitud ante la pluralidad de sectores productivos que contempla su aplicación, entre otros aspectos. En Costa Rica, el proceso de evaluación ambiental lo fiscaliza la Secretaría Técnica Nacional Ambiental (SETENA); entre los instrumentos de fiscalización se dispone del formulario ambiental denominado “Formulario D-1”, en el cual, el futuro desarrollador de la obra, actividad o proyecto evidencia los impactos ambientales y sociales a generar por parte de la actividad a desarrollar. En el presente trabajo de investigación se desarrolló una evaluación del impacto ambiental de diferentes sectores productivos en Costa Rica a partir de formularios D-1 ingresados a la SETENA durante los años 2018 y 2019. En total se analizaron 125 formularios de futuros proyectos a desarrollar. El sector industrial denominado “Explotación de minas y canteras” presenta el mayor valor de impacto ambiental (271,27). Por su parte el sector industrial con menor valor de impacto ambiental (94,64) corresponde a “Electricidad, gas y agua”.

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Section: Resultados Y Discusiónunclassified

Impacto ambiental de diferentes sectores productivos de Costa Rica

Arce-Villalobos¹,

Arias-Castro²,

Hernández-Ugalde³

et al. 2021

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“…In order to characterize and compare these parameters, the SPSS Statistics v22 software (International Business Machines Corporation, USA) was used to analyze the chemical properties of the water and stream sediment samples. PCA was applied to the water quality variable analysis (Amari, 2014), while FA quickly simplified the data by extracting the eigenvalues and eigenvectors from the correlation coefficient matrix (Davis and Sampson, 1986). The Kaiser-Meyer-Olkin (KMO) and Bartlett's tests of sphericity have been frequently used to test the appropriateness of FA with the data.…”

Section: Discussionmentioning

confidence: 99%

Chemical and Statistical Studies on Water and Stream Sediments Around the Coal Mine Area in Dazhu, China

Deng¹,

Wu²,

Ren³

et al. 2021

Preprint

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Coal mine pollution has become one of the most serious environmental problems in China and elsewhere. Water, in the form of groundwater and streams, as well as stream sediment samples, were collected from the coal mine area in Dazhu, Southwestern China. Different analyses, including the hydro-geochemical, multivariate analyses and X-ray analyses, were conducted to examine the coal mine pollution effect. The study results show that the groundwater and stream samples are slightly acidic to alkaline with pH values of 6.36 to 7.17 and 6.51 to 7.39, respectively. With the dissolution of carbonate and sulfate, a large amount of Ca2+, Mg2+, and SO42- is found in the groundwater and stream samples, which is higher than the environmental background value. Typically, the water samples are dominated by Ca2++Mg2+-HCO3- and Ca2++Mg2+-Cl-. According to Chinese standard and the World Health Organization’s guidelines, the water in the coal mine area is of good quality in terms of its physical and chemical properties, except for the concentrations of Fe and Mn (1925.14 and 12872.882 μg/L, respectively). Principal component analysis reveal two groups that explained the variance in the data consisting of SO42−, Ca2+, Mg2+, and low pH as well as HCO3−, Na+, and Cl−, which can reflect the acid mine drainage effects as well as different human activities or the evaporation found in low mountains and hills, respectively. Hence, the concentrations of metals and metalloids in the stream sediments are affected by the coal mine drainage, which are generally enriched in Cr, Mn, Zn, Sr, Co, Ni, Cu, Al, Ca, Fe, and Mg. Mn and Fe average concentrations are higher in the downstream Kongjiagou drain stream sediment samples were 2035.03 ppm and 6%, respectively, relative to the Mn and Fe average concentrations in Xiaojiagou of 453.04 ppm and 2.96%, respectively. Both Mn and Fe concentrations are higher than the background values. Ultimately, mine closures can help with the process of ecological and environmental recovery.

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“…In fact, in the mining exploration field, it is well known that the abundance of some elements is typically linked to some lithologies and/or metallogenic contexts. This relative abundance (or deficiency) affects any media linked to these environments such as water [ 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 ], soil [ 89 , 118 , 119 , 124 , 127 , 128 , 129 , 130 , 131 , 132 ] and so also the biological sphere. However, it should be considered that the complexity and dynamism of the environment could complicate the interpretations [ 133 ].…”

Section: Discussionmentioning

confidence: 99%

Zinc Status and Autoimmunity: A Systematic Review and Meta-Analysis

et al. 2018

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Zinc is an essential trace element for living organisms and their biological processes. Zinc plays a key role in more than 300 enzymes and it is involved in cell communication, proliferation, differentiation and survival. Zinc plays also a role in regulating the immune system with implications in pathologies where zinc deficiency and inflammation are observed. In order to examine the experimental evidence reported in the literature regarding zinc levels in the body of patients with autoimmune disorders compared to control individuals, a systematic review and meta-analysis were performed. From 26,095 articles identified by literature search, only 179 of them were considered potentially relevant for our study and then examined. Of the 179 articles, only 62 satisfied the inclusion criteria. Particularly for Fixed Model, Zn concentration in both serum (mean effect = −1.19; confidence interval: −1.26 to −1.11) and plasma (mean effect = −3.97; confidence interval: −4.08 to −3.87) samples of autoimmune disease patients was significantly lower than in controls. The data presented in our work, although very heterogeneous in the manner of collecting and investigating samples, have proved to be extremely consistent in witnessing a deficiency of zinc in serum and plasma of patients compared to controls.

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Impact of mine tailings on surrounding soils and ground water: Case of Kettara old mine, Morocco

Cited by 66 publications

References 13 publications

Impacto ambiental de diferentes sectores productivos de Costa Rica

Impacto ambiental de diferentes sectores productivos de Costa Rica

Chemical and Statistical Studies on Water and Stream Sediments Around the Coal Mine Area in Dazhu, China

Zinc Status and Autoimmunity: A Systematic Review and Meta-Analysis

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