Impact of serpentinized peridotite mine waste on the composition and quality of sediments in the Ría de Ortigueira (Galicia, NW Spain)

2021 ◽  
Vol 163 ◽  
pp. 111963
Author(s):  
P. Guevara ◽  
A. Pérez-Alberti ◽  
R. Carballo ◽  
M. Sánchez ◽  
I. López ◽  
...  
2021 ◽  
Vol 240 ◽  
pp. 01006
Author(s):  
Khalida Bouali ◽  
Mourad Arabi ◽  
Latifa Mechkirrou ◽  
Abdelhafid chafi

The Oriental region, in Morocco, is surrounded by the Algerian border to the East, the Atlas to the West, the Mediterranean to the North and the desert to the south. This region has benefited from the intense mining activity that has played an important role in the national economy. The intensification of mining activity in the Touissit and Sidi-Boubker mines has left behind the closure of tons of waste in the shelter without a plan of conservation. These mine waste storage sites still contain very high levels of metallic elements such as Iron (Fe), which, after a decade of shutdowns, are likely to pollute vulnerable receiving environments, posing a threat to wildlife ecosystems, flora, and to public health. The objective of this study was to assess Fe concentrations at several locations around these mine waste heaps. The results of physicochemical analyses of soils collected over two different periods (wet and dry seasons) showed maximum Fe element concentrations of 10596 mg/kg, with an average concentration of 8913 mg/kg. These Iron contents are found at concentrations exceeding tolerance standards for normal soil.


Ecotoxicology ◽  
2009 ◽  
Vol 19 (4) ◽  
pp. 735-750 ◽  
Author(s):  
Beatriz Fernández ◽  
Marina Albentosa ◽  
Lucía Viñas ◽  
Angeles Franco ◽  
Juan J. González ◽  
...  

2020 ◽  
Vol 11 (2) ◽  
pp. 55
Author(s):  
Deddy Erfandi

<p><strong>Abstrak. </strong>Salah satu pemanfaatan lahan yang memiliki dampak negative terhadap kualitas lahan adalah kegiatan penambangan. Dengan ekploitasi lahan yang intensif menyebabkan permukaan lahan (lansekap) menjadi tidak beraturan. Limbah sisa hasil tambang yang berada dipermukaan lahan seperti batuan sisa bahan tambang (<em>overburden</em>), sisa bahan tambang yang berbentuk pasir (<em>tailing</em>) dan air asam tambang serta limbah batuan yang mengandung logam berat sering menimbulkan kualitas lahan menjadi <em>stress</em>. Bahan sisa limbah hasil tambang memiliki kandungan bahan organik dan kelembaban tanah yang sangat rendah, tanah mudah padat. Lapisan tanah atas pada lahan bekas tambang sangat heterogen dan memiliki berat isi tinggi, bersifat toksik dan hara makro menjadi tidak tersedia bagi tanaman sehingga tanaman tidak tumbuh dan berproduksi serta memiliki populasi mikroba tanah rendah. Pengelolaan lansekap pada lahan bekas tambang tidak terlepas dari tindakan konservasi tanah, karena selain memperbaiki tanah untuk media tumbuh tanaman, juga mengurangi dampak negative terhadap erosi dan aliran permukaan. Salah satu pendekatan dalam pengelolaan lansekap adalah meningkatkan kualitas tanah yang ramah lingkungan dan berkelanjutan. Pencegahan degradasi lahan dan membangun sumber bahan organik <em>in-situ</em>, melalui rotasi tanaman, sistim pengolahan tanah, penggunaan mulsa tanaman, tanaman penutup tanah dan pertanaman berlereng. Pemanfaatan sumberdaya lokal menjadi penting dalam rangka meningkatkan kualitas lahan bekas tambang. Namun hal terpenting bahwa pembenah tanah harus potential memperbaiki sifat fisik, kimia dan mikrobiologi tanah, serta bahan pembenah tanah atau ameliorant merupakan sumberdaya lokal.  </p><p><em><strong>Abstract. </strong>One use of land that has a negative impact on the quality of land is mining. With the intensive exploitation of land which causes the surface of the land (landscape) becomes irregular. Residual waste that is surface mined land as mine waste rock material (overburden), residual minerals in the form of sand (tailings) and acid mine drainage and waste rock containing heavy metals often cause the quality of land to become stressed. Waste material mined residual organic matter and soil moisture is very low, easy to soil solid. A layer of topsoil on mined lands is very heterogeneous and have a high bulk density, toxic and macro nutrients unavailable to plants so that the plants do not grow and produce, and have low soil microbial populations. Landscape management on mined land can not be separated from soil conservation measures, because in addition to improve the soil for plant growth media, also reduces the negative impact on erosion and runoff. One approach in the management of the landscape is improving soil quality that are environmentally friendly and sustainable. Prevention of land degradation and build a sources of organic material in-situ, through crop rotation, tillage systems, crop mulching, cover crops and crop cycle. Utilization of local resources to be important in order to improve the quality of mined lands. But the most important thing, that soil ameliorant should be potential improve to soil physical, chemical and biological , as well as ameliorant material are a local resource.</em></p>


Ecohydrology ◽  
2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
V. Cuadrado ◽  
X. X. Neira ◽  
T. S. Cuesta
Keyword(s):  
Nw Spain ◽  

Author(s):  
David Gutiérrez ◽  
Romina Álvarez-Troncoso ◽  
Yasmina Martínez-Barciela ◽  
Alejandro Polina ◽  
Josefina Garrido

This paper studies the effect of wastewater discharges on benthic macroinvertebrates in the Furnia River (Pontevedra, NW Spain). Semiquantitative surveys were carried out in spring 2008 and 2017 in three different locations, upstream and downstream of a sewage treatment plant built in 2013. Different indexes were calculated based on benthic macroinvertebrate assemblages: abundance, richness, Shannon-Wiener, EPT, IASPT, IBMWP and several physicochemical variables were measured concurrently. Although the indexes values decreased slightly along the water course, the results indicate an optimal water quality of the Furnia River, supporting a very diverse community of aquatic macroinvertebrates.


2021 ◽  
Vol 19 (1) ◽  
pp. e0601
Author(s):  
Marcio Vargas-Ramella ◽  
José M. Lorenzo ◽  
Diego Rois ◽  
Anisia Arias ◽  
José R. Justo ◽  
...  

Aim of study: To evaluate the effect of different diets on carcass characteristics and meat quality from Mos free-ranged cockerel.Area of study: Galicia (NW Spain).Material and methods: Cockerels (n=75) were allocated to 3 groups (n=25) according to finishing diets: commercial fodder (CF), 50% wheat and 50% corn (WH) and 33% wheat and 66% corn (CR). Meat quality was assessed in terms of physicochemical, and nutritional features.Main results: The highest live and carcass weight were obtained in CF group. Meat from CF and CR groups were similar in moisture, protein and cholesterol content in drumstick cut, meanwhile in breast piece there were no significant differences (p>0.05) in intramuscular fat (IMF), ash, and lightness (L*). On the other hand, finishing diet affected L* and redness (a*) values, showing the highest L* values in meat samples from CF treatment (49.94 for drumstick) (p<0.01), whereas a* was superior in WH samples (11.30 and 4.61, for drumstick and breast, respectively) (p<0.001). Meat shear force test was not affected (p>0.05) by diets. Finally, the finishing feed affected (p<0.05) the fatty acid and amino acid profile in both cuts (drumstick and breast).Research highlights: Present study allowed to characterize for the first time Mos cockerels fed with different diets. Some carcass features obtained were higher than previous studies with other Mos categories, and some autochthonous and industrial breeds. Meat from cockerels was characterized by a high protein percentage and lower IMF.


2018 ◽  
Vol 2 ◽  
pp. 7-27
Author(s):  
Enrique J. Montenegro Rúa

Horseshoe arches samples in funerary steles from north-western Hispania are usually identified as simple geometric decorative motifs. This opinion has also been associated with what is represented in the stele of Valens (León, NW Spain), despite the fact that the artistic quality of the bas-relief allows to link it better with an architectural element. Likewise, it is very remarkable the practical absence of references in specialized historiography to another significant sample of horseshoe arch, despite being part of one of the most important classical monuments: the Pantheon of Rome. Located on the inside face of the door, the prominence of this majestic arch in the construction design of the Pantheon explains the symbolic meaning of what is represented in the stele of Valens.


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