Phytoremediation as an Alternative Way for the Treatment of Large, Low Heavy Metal Contaminated Sites: Application at a Former Uranium Mining Area

2009 ◽  
Vol 71-73 ◽  
pp. 705-708 ◽  
Author(s):  
Sabine Willscher ◽  
J. Wittig ◽  
Hans Bergmann ◽  
Georg Büchel ◽  
Dirk Merten ◽  
...  

Large sites with a low contamination of metall(oid)s were in the past a problem for remediation measures – the “traditional” processes were too expensive for an application on such expanded areas. Phytoremediation can be an alternative for such low contamination problems. In Germany, a research project is performed on this subject, in cooperation of the University of Jena and the TU Dresden. The field site is a former U mining area. Until 1991, a low grade U ore dump for sulfuric acid leaching was located on this site. After the close-down of the U mining in East Germany in 1991, the dump material was removed. Now, a phytoremediation test field is constructed on top of this site for the capture of the remained contaminants coming up by capillary forces. The paper pictures the phytoremediation in general, the research project and gives some first preliminary results.

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 376 ◽  
Author(s):  
Qian Zhang ◽  
Qicheng Feng ◽  
Shuming Wen ◽  
Chuanfa Cui ◽  
Junbo Liu

In this work, oxidizing roasting was combined with leaching to separate copper, lead, and zinc from a concentrate obtained by bulk flotation of a low-grade ore sourced from the Jiama mining area of Tibet. The flotation concentrate contained 7.79% Cu, 22.00% Pb, 4.81% Zn, 8.24% S, and 12.15% CaO; copper sulfide accounted for 76.97% of the copper, lead sulfide for 25.55% of the lead, and zinc sulfide for 67.66% of the zinc. After oxidizing roasting of the flotation concentrate, the S content in the roasting slag decreased to 0.22%, indicating that most sulfide in the concentrate was transformed to oxide, which was beneficial to leaching. The calcine was subjected to sulfuric acid leaching for separation of copper, lead, and zinc; i.e., copper and zinc were leached, and lead was retained in the residue. The optimum parameters of the leaching process were: a leaching temperature of 55 °C; sulfuric acid added at 828 kg/t calcine; a liquid:solid ratio of 3:1; and a leaching time of 1.5 h. Under these conditions, the extents of leaching of copper and zinc were 87.43% and 64.38%, respectively. Copper and zinc in the leaching solution could be further separated by electrowinning. The effects of leaching parameters on the extents of leaching of copper and zinc were further revealed by X-ray diffraction and scanning electron microscopy analysis.


1982 ◽  
Vol 11 (6) ◽  
pp. 20-25
Author(s):  
Tito Valenzuela

This second piece by a Latin American about exile explores through that experience many aspects of his people's ‘personality’ and the events leading to exile. Tito Valenzuela is a 37-year-old Chilean poet and … now … novelist. After studying painting and graphic design at the School of Fine Arts of the University of Chile in Santiago, he worked during the years of Salvador Allende's Popular Unity government in film-making and television. A book of his poetry was published in 1971, and more appeared in an anthology of work by young Chilean poets in 1972. At the time of the military coup of 11 September 1973 he was working on a film on the nitrate mining area of northern Chile. During the coup the military raided his home, removing books and manuscripts. After living clandestinely for several months, Tito left the country for Peru. Unable to remain there he took up an offer by the United Nations to go to Rumania. Finding the atmsophere there restrictive and stifling, he left for Sweden, where he worked in a ham factory, then travelled on to Berlin and finally London in 1975. After a long battle with British immigration authorities he was given permission to stay. Pasajero en transito (‘Passenger in Transil’) is Tito Valenzuelas's first novel, as yet unpublished. It concerns a young Chilean photographer, Ignacio (García, who is exiled (like the author) first in Bucharest and then in Stockholm. The protagonist's profession is itself an image of his psychological state, where the past freezes in the present, tending to mystification and distortion. By tracing Ignacio's obsessions in exile and the deterioration in the past of his relationship with Soledad … who disappears during the first days of the coup … the novel explores the Chile of both Allende and the months following the coup, as well as exile itself. The extract we publish finds Ignacio in Bucharest, playing chess with another exile, Pedro ‘El Peluca’ Morales, whose situation is also producing crisis and domestic rupture. Certain references need explanation. Chileans make great use of nicknames, and most of the characters are referred to by these. El Peluca means ‘the wig’. Loco ‘crazy’ and El Caluga ‘the candy’ (as in sweet). Others have been translated - The Philologist, the Marquis. Coco is untranslatable. Huevón is the all-purpose Chilean interpolation, used incessantly, affectionately and in anger. Literally obscene, it means ‘big balls’. El Pedagogico is the Instituto Pedagogico, the Teacher Training Institute in Valparaiso. The Lebu was a ship used by the military as a prison during the military coup. Milico is slang for military. The tanquetazo was the attempted coup carried out by a tank regiment in June 1973.


2006 ◽  
Vol 22 (4) ◽  
pp. 324-335
Author(s):  
Marie Kruger

The appeal of the puppet lies partly in its dual nature: it is at once a representative object without life while at the same time it enacts the imagined life with which it is endowed by the puppeteer. Marie Kruger argues that this duality makes puppetry a uniquely effective way of questioning the very traditional values it appears to embody, and so of stimulating a sense of the need for social change. She relates her argument to the long tradition of puppetry among the Bamana people of Mali, and specifically to the performance of the Bin Sogo bo, an animal masquerade in which the ‘characters’ adumbrate human qualities with effective ambiguity. Marie Kruger is Chair of the Department of Drama at the University of Stellenbosch, South Africa, where puppetry is offered as a performance option. She is the author of Puppetry: a Guide for Beginners and has also published in the South Africa Theatre Journal. Over the past twenty years she has directed numerous puppet productions for all ages, and is currently leading a research project to document the nature and application of African puppet traditions.


2019 ◽  
Vol 65 ◽  
pp. 157-175
Author(s):  
Nicholas Salmon

This contribution offers an overview of recent fieldwork and museum-based projects focused on the Rhodian countryside and Dodecanese islands. The excavations conducted by the Ephorate of Antiquities of the Dodecanese over the past two decades, paired with the study of Rhodian collections in the Louvre and British Museum, among other museums, have developed and promoted the archaeological record of the region. The Kymissala Archaeological Research Project led by the University of the Aegean and a collaborative doctoral project investigating the British Museum’s collections from Kamiros each demonstrate the potential of revisiting historic excavations through topographical surveys and archival documentation.


2010 ◽  
Vol 1 (2) ◽  
pp. 143 ◽  
Author(s):  
Michael Moser ◽  
Simon Hye ◽  
Gert Goldenberg ◽  
Klaus Hanke ◽  
Kristóf Kovács

<p>In 2007 the special research program HiMAT - History of Mining Activities in Tyrol and adjacent areas, focussing on environment and human societies, was established at the University of Innsbruck as an interdisciplinary and international research project, sponsored by the Austrian Science Fund (FWF). During late medieval and early modern times, the mining area of Schwaz in Tyrol became famous in Europe, due to the large scale exploitation of copper and silver bearing fahlores, going along with the development of high technologies in the field of mining and metallurgy. In that period, Schwaz was even called “the mother of all mines”.</p><p>In the area of Schwaz/Brixlegg the main focus of our research project is on early traces of copper mining and metallurgy dating back to the late Bronze Age. Such traces are still preserved, especially in boundary areas of the main ore deposits. On the basis of previous surveys a little valley called “Maukental” was chosen for archaeological investigations, because within this small area the entire copper production process of the late Bronze Age can be studied in detail. During the past two years, the Institute of Archaeology and Surveying and the Geoinformation Unit of the University of Innsbruck worked together in this area. One object of interest was a late Bronze Age ore dressing site situated in a former peat-bog. In this place the advantageous environment preserved fragile wooden structures and artefacts which could be digitally documented in the condition of retrieval.</p>


Tempo ◽  
2017 ◽  
Vol 72 (283) ◽  
pp. 90-92
Author(s):  
Oliver Thurley

At the beginning of July, the University of Leeds played host to the ‘Performing Indeterminacy’ conference: a series of talks, panels and concerts that are part of a research project on John Cage's Concert for Piano and Orchestra (1957–58), led by Philip Thomas and Martin Iddon. In the middle of all this, Apartment House presented what many consider the pinnacle of Cage's indeterminate work alongside a new commission from Christian Wolff, the last surviving member of the New York School composers. Resistance (2016–17), Wolff's new work ‘for 10 or more players and a pianist’, was written in response to Cage's Concert, sharing elements of its instrumentation and schema. In Leeds’ Clothworkers Hall, Apartment House – led by Anton Lukoszevieze – premiered the new piece alongside its progenitor, composed some 59 years apart. At the heart of both pieces in this concert is Philip Thomas at the piano. The conscientiousness and exactitude that Thomas brings to the music of both Cage and Wolff (having worked closely with the latter over the past 15 years) make him, perhaps, the ideal soloist for this programme. Quite simply, it is a line-up that could not have come about through chance procedure.


1979 ◽  
Vol 46 ◽  
pp. 96-101
Author(s):  
J.A. Graham

During the past several years, a systematic search for novae in the Magellanic Clouds has been carried out at Cerro Tololo Inter-American Observatory. The Curtis Schmidt telescope, on loan to CTIO from the University of Michigan is used to obtain plates every two weeks during the observing season. An objective prism is used on the telescope. This provides additional low-dispersion spectroscopic information when a nova is discovered. The plates cover an area of 5°x5°. One plate is sufficient to cover the Small Magellanic Cloud and four are taken of the Large Magellanic Cloud with an overlap so that the central bar is included on each plate. The methods used in the search have been described by Graham and Araya (1971). In the CTIO survey, 8 novae have been discovered in the Large Cloud but none in the Small Cloud. The survey was not carried out in 1974 or 1976. During 1974, one nova was discovered in the Small Cloud by MacConnell and Sanduleak (1974).


Author(s):  
Kenneth C. Moore

The University of Iowa Central Electron Microscopy Research Facility(CEMRF) was established in 1981 to support all faculty, staff and students needing this technology. Initially the CEMRF was operated with one TEM, one SEM, three staff members and supported about 30 projects a year. During the past twelve years, the facility has replaced all instrumentation pre-dating 1981, and now includes 2 TEM's, 2 SEM's, 2 EDS systems, cryo-transfer specimen holders for both TEM and SEM, 2 parafin microtomes, 4 ultamicrotomes including cryoultramicrotomy, a Laser Scanning Confocal microscope, a research grade light microscope, an Ion Mill, film and print processing equipment, a rapid cryo-freezer, freeze substitution apparatus, a freeze-fracture/etching system, vacuum evaporators, sputter coaters, a plasma asher, and is currently evaluating scanning probe microscopes for acquisition. The facility presently consists of 10 staff members and supports over 150 projects annually from 44 departments in 5 Colleges and 10 industrial laboratories. One of the unique strengths of the CEMRF is that both Biomedical and Physical scientists use the facility.


1996 ◽  
Vol 10 ◽  
pp. 1 ◽  
Author(s):  
Jay Hall ◽  
Jonathan Prangnell ◽  
Bruno David

The Tower Mill, Brisbane's oldest extant building, was excavated by the University of Queensland to determine for the Brisbane City Council the heritage potential of surrounding subsurface deposits.  Following the employment of GPR, excavation revealed interesting stratifications, features and artefacts.  Analysis permits an explanation for these deposits which augment an already fascinating history of the site's use over the past 170 years or so.


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