Mine Tailings Impact on the Physico-Chemical and Biological Characteristics of Underground Waters in Marrakech Mining Area (Morocco)

2006 ◽  
Author(s):  
M. El Adnani ◽  
A. Ait Boughrous ◽  
M. Yacoubi Khebiza ◽  
M.L. Sbai ◽  
A. Nejmeddine
Keyword(s):  
Mine Tailings ◽  
Mining Area ◽  
Biological Characteristics ◽  
Underground Waters ◽  
Physico Chemical

scholarly journals FR-900520 and FR-900523, novel immunosuppressants isolated from a Streptomyces. II. Fermentation, isolation and physico-chemical and biological characteristics.

1988 ◽  
Vol 41 (11) ◽  
pp. 1592-1601 ◽  
Author(s):  
HIROSHI HATANAKA ◽  
TOHRU KINO ◽  
SUSUMU MIYATA ◽  
NORIAKI INAMURA ◽  
AKIO KURODA ◽  
...  
Keyword(s):  
Biological Characteristics ◽  
Physico Chemical

Pasture species behaviour on sulfide mine tailings rehabilitated with a designed Technosol

2020 ◽  
Author(s):  
Diego Arán ◽  
Erika Santos ◽  
Maria Manuela Abreu ◽  
Juan Antelo ◽  
Felipe Macías
Keyword(s):  
Mine Tailings ◽  
Trifolium Pratense ◽  
Mine Drainage ◽  
Plant Cover ◽  
Mining Area ◽  
Physicochemical Characteristics ◽  
Superficial Layer ◽  
Green Technology ◽  
Shoot Biomass ◽  
Mine Wastes

<p>The uranium mineralization from Fé mining area (Spain) contains sulfides, resulting mine wastes generators of acid mine drainage rich in potentially hazardous elements (PHE). The improvement of the physicochemical characteristics and biogeochemical processes of sulfide mine tailings as well as their socioeconomic valorisation can be achieved by the application of a green technology based on circular economy: Technosol. The efficiency of the application of a superficial layer of a designed Technosol with specific properties to the rehabilitation of the sulfide tailings from Fé mining area was tested. Also, the risk assessment of the land recovery by this technology to pasture was evaluated through a microcosm experiment.</p><p>After 20 months of the Technosol application in the field, composite samples of Technosol, recovered tailing (bottom of the Technosol) and tailings without recuperation (control tailing) were collected. These samples were used for microcosm assay and characterized for pH, electric conductivity, fertility, PHEs concentration in total fraction and available fraction extracted with rhizosphere-based method. The substrate effect on development of <em>Lollium perenne</em> and <em>Trifolium pratense</em> (visual signs of phytotoxity, percentage of plant cover and dry shoots biomass) and multielemental composition in their of shoots was evaluated in microcosm assay under greenhouse conditions.</p><p>Mine wastes from control tailing had pH ≈4 and high total concentrations of several PHEs (g/kg; Al: 46.2; As, Co and Pb: 0.02-0.03; Cu: 0.04; Fe: 63.2 Mn: 1.3; Ni and Zn: 0.1-0.2). Potentially toxic concentrations of Co, Mn and Ni were identified in the available fraction pointing out the serious environmental risk posed by the control tailing. These chemical characteristics together lack of structure iin mine wastes from control tailing contributed to total inhibition of Trifolium germination and a significant diminution of Lollium growth. Both species growing in Technosol and recovered tailing produced significant plant cover and quite similar amounts of shoot biomass.</p><p>The improvement of the overall physicochemical properties in the recovered tailing materials (e.g. the decrease of the hazardous element concentrations in available fraction, and the improvement of the fertility and structure) allowed a quick and secure plant cover with pasture species. The results evidenced the efficiency of the designed Technosol in the sulfide mine tailing rehabilitation and potential land recovery to pastures.</p><p>The authors thank ENUSA for technical cooperation and providing the study area and soil samples.</p>

The waterbodies of the Dallol volcano: A physico-chemical and geo-microbial survey

2020 ◽  
Author(s):  
Hugo Moors ◽  
Miroslav Honty ◽  
Carla Smolders ◽  
Ann Provoost ◽  
Mieke De Craen ◽  
...  
Keyword(s):  
Saline Water ◽  
Halophilic Archaea ◽  
Mining Area ◽  
Ex Situ ◽  
Base Region ◽  
The South ◽  
North East ◽  
The North ◽  
Physico Chemical

<p>The geological extreme Dallol region, located around the Dallol volcano in the north-east of Danakil depression (Ethiopia), is considered as one of the harshest and hottest places on Earth. The geology is made up of years and years of evaporates accumulation. Volcanic activity generates ascending brines that may cross and mix with aquifers from inflowing meteoric water originating from the Ethiopian highlands on the east of the Danakil depression. When these mixtures reach the surface they can generate hydrothermal springs giving rise to waterbodies in the form of small ponds or lakes. During the Europlanet 2018 Danakil field expedition, ten of these saline waterbodies were extensively studied by <em>in situ</em> measurements and <em>ex situ</em> geo–physico-chemical and –microbiological analyses of collected samples, liquids as well as sediments.</p><p>The <em>in situ</em> physico-chemical measurements clearly indicated the extreme nature of all ten investigated lakes. Laboratory analyses of the collected batch samples of liquids and sediments confirmed the extreme character of the waterbodies and complements our geological survey of the region with valuable geo–chemical and –microbiological data.</p><p>Based on our analytical results, the relative small Dallol region can still be subdivided into three geological smaller areas: the outcrop zone, the volcanic base region and the distant south area. The outcrop zone is dominated by sodium, iron and potassium. Oxidation processes in the outflowing superheated ferrous and sulfidic rich brine give rise to some of the most acidic ponds on our planet. In the ponds and lakes of the volcanic base region, incredible high amounts of calcium and/or magnesium can remain in their dissolved form as the most dominant and quasi only available anion is chloride. This region is host for the most saline water body on Earth. Chemical analysis of the lakes of the distant south area show that sodium is by far the most dominant cation. It is therefore no surprise that the large Karum Lake in the south region is economically exploited for the mining of sodium chloride.</p><p>Our mineralogy analyses render results that are completely in line with the observed geochemistry of the waterbodies. Halite and sylvite are the most present minerals in the Dallol outcrop zone associated with some gypsum and in one case with anhydrite. The geology around the waterbodies of volcanic base zone are a little bit more divers. On the shores of the Gaet’ale Pond tachyhydrite, chloromagnesite, halite and sylvite is determined, while the Black Lake is surrounded by bischofite and carnalite. Logically, the mineralogy of the south area, the salt mining area, is dominated by halite and sylvite.</p><p>Apparently, the geochemistry of the outcrop zone and volcanic base region is so harsh that no extremophilic organism is able to survive in these areas. Only in the distant south area did we find indications of the presence of halophiles. Besides the bacterial genus <em>Salinibacter</em>, our 16S rDNA microbiological fingerprinting indicates the presence of halophilic archaea like:  <em>Halobaculum sp., Halobellus sp., Halomicroarcula sp., Halorientalis sp.</em> with the majority of the population being <em>Candidatus Nanosalina sp</em>.</p>

scholarly journals The beidellite clays from the Bełchatów lignite deposit as a raw material for constructing waterproofing barriers

2017 ◽  
Vol 33 (2) ◽  
pp. 53-67 ◽  
Author(s):  
Tadeusz Ratajczak ◽  
Elżbieta Hycnar ◽  
Piotr Bożęcki
Keyword(s):  
Mechanical Properties ◽  
Surface Waters ◽  
Natural Environment ◽  
Environmental Engineering ◽  
Raw Material ◽  
Underground Waters ◽  
Physico Chemical ◽  
Clay Rocks ◽  
Significant Distance ◽  
Artificial Water

Abstract Disposal sites for both industrial and communal waste are hazardous for the natural environment due to the accumulated materials and their chemical, physical and biological transformations. The products of these processes migrating at a significant distance contaminate mainly underground waters, surface waters and soils. The spreading of the pollutants may be prevented by horizons of clay rocks that form natural geological barriers. The clay rocks of properly selected parameters may be used in the environmental engineering for constructing artificial water-sealing layers. The mineral, chemical, physico-chemical and physico-mechanical properties of the beidellite clays occurring within the lignite deposit in Bełchatów were studied to find out whether they meet the criteria of waterproofing engineering contained in the Polish recommendations and instructions. The results indicate that the beidellite clays of Bełchatów are rocks suitable for this kind of environmental engineering and may be used in constructing the barriers preventing the migration of effluents from landfills.

scholarly journals A novel antibiotic, sohbumycin. Taxonomy, fermentation, isolation and physico-chemical and biological characteristics.

1985 ◽  
Vol 38 (8) ◽  
pp. 967-971 ◽  
Author(s):  
IWAO UMEZAWA ◽  
CLAUDE TRONQUET ◽  
SHINJI FUNAYAMA ◽  
KENJI OKADA ◽  
KANKI KOMIYAMA
Keyword(s):  
Biological Characteristics ◽  
Physico Chemical

scholarly journals Surface Water and Groundwater Quality Evaluation in a Mining Area

2020 ◽  
Vol 71 (6) ◽  
pp. 124-131
Author(s):  
Alina Cochiorca ◽  
Valentin Nedeff ◽  
Narcis Barsan ◽  
Ion Sandu ◽  
Emilian Mosnegutu ◽  
...  
Keyword(s):  
Surface Water ◽  
Dissolved Oxygen ◽  
Mining Area ◽  
Chemical Parameters ◽  
Chemical Indicators ◽  
Surface Water And Groundwater ◽  
Physico Chemical ◽  
Three Rivers

This paper presents a monitoring of groundwater and surface water in the mining area Tg. Ocna, by analyzing 16 physico-chemical parameters (pH, turbidity, dissolved oxygen, Pb, Ni, Cu, Fe, Mn, Zn, Cr, Mg, SO42-, Al, NO2-, NO3-, NH4+), from three rivers Slanic, Trotus and Valcele, a small lake Groapa Burlacu, a fountain and three monitoring drilling wells (F11, F16 and F17). Studies on the quality of surface water and groundwater in areas near mines are important due to extraction and exploitation of salt. The samples were collected in April 2019. Following the analyzes, their results are included in the following concentration ranges: pH 7.21 to 8.46 unit. pH, turbidity 0.54 to 169 NTU, dissolved oxygen 6 to 8.59 mg/L, Pb 0.075 to 0.095 mg/L, Ni 0.026 to 1.05 mg/L, Cu 0.088 to 0.809 mg/L, NO2- 0.001 to 0.037 mg/L and NO3- 0.290 to 4.34 mg/L. The pH, turbidity and dissolved oxygen were measured in situ using portable equipment�s. As for the other parameters, they were analyzed in the water laboratory from Vasile Alecsandri University of Bacau by using spectrophotometry. Some concentrations of the physico-chemical indicators of the water samples analyzed were found to be more than the water quality classes.

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