scholarly journals BIOGEOCHEMISTRY OF NICKEL DURING IRRIGATION

2020 ◽  
Vol 10 (3) ◽  
pp. 124-132
Author(s):  
Tat'yana Kramareva ◽  
Nadezhda Gorbunova ◽  
Arkadi Gromovik ◽  
Elena Kulikova
Keyword(s):  
Organic Matter ◽  
Metal Content ◽  
Crop Production ◽  
Total Content ◽  
High Metal Content ◽  
High Metal ◽  
Transformation Of Organic Matter ◽  
Humus Horizons ◽  
Hydrolytic Acidity

The geochemical feature of the study area is the enrichment of soil-forming and underlying rocks with Ni, and, as a consequence, a high metal content in groundwater and surface sources, the water of which is used for irrigation. The regular supply of the element with irrigation water leads to an increase in the total content of Ni and its exchange compounds in the upper humus horizons of the studied leached chernozems. Irrigation contributes to the accumulation of Ni in grain and phytomass of crop production. It is shown that long-term irrigation leads to the transformation of organic matter, a change in the pH of the soil solution and the values of hydrolytic acidity.

scholarly journals Green remediation of tailings from the mine using inorganic agents

2017 ◽  
Vol 71 (2) ◽  
pp. 155-165 ◽  
Author(s):  
Aleksandar Dosic ◽  
Dragana Tomasevic-Pilipovic ◽  
Miladin Gligoric ◽  
Bozo Dalmacija ◽  
Djurdja Kerkez ◽  
...  
Keyword(s):  
Mine Tailings ◽  
Treatment Process ◽  
Mine Tailing ◽  
High Metal Content ◽  
Green Remediation ◽  
High Metal ◽  
Environmentally Sound ◽  
Sound Management ◽  
The Impact

Increasing amounts of residues and waste materials coming from industrial activities in different processes have become an increasingly urgent problem for the future. The paper presents the problem of mine tailings generated in mine ?Sase? (Republic of Srpska, Bosnia and Herzegovina) with high metal content (Pb, Cu and Zn). Dumpsite of this tailing represents potential risk for water bodies in the vicinity of this location. Chosen treatment process was stabilization/solidification (S/S). Inorganic agents used in this study were fly ash and red mud that represent secondary industrial waste generated on locations relatively near the mine. Therefore, their application can be used as an example of a sustainable solution of regional environmental problem. Further investigations are related to the impact of various factors on metals leaching from mine tailings solidified/stabilized material using the above mentioned immobilization agents. The performance of the immobilizing procedures was examined using several leaching tests: ANS 16.1, TCLP, DIN, MWLP. The results indicated that all S/S samples can be considered as non-hazardous waste, as all leached metal concentrations met the set criteria. These results will further enable the modelling of metals behaviour during long-term leaching from treated mine tailing. The data are invaluable in terms of economically and environmentally sound management of mine tailing.

Demetallization of Heavy Oils of High Metal Content through Pyrolysis under Supercritical Water Environment

2020 ◽  
Vol 34 (3) ◽  
pp. 2861-2869 ◽  
Author(s):  
Xu-Quan Tang ◽  
Jing-Cao Pu ◽  
Hong-Bing Zheng ◽  
Xu-De Yu ◽  
Xue-Feng Chen ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Metal Content ◽  
Water Environment ◽  
Heavy Oils ◽  
High Metal Content ◽  
High Metal

Preparation of high metal content nanoporous carbon

2013 ◽  
Vol 115 ◽  
pp. 115-121 ◽  
Author(s):  
Miguel Molina-Sabio ◽  
Mateus Carvalho Monteiro de Castro ◽  
Manuel Martinez-Escandell ◽  
Francisco Rodríguez-Reinoso
Keyword(s):  
Metal Content ◽  
Nanoporous Carbon ◽  
High Metal Content ◽  
High Metal

scholarly journals Soil management effects on organic carbon in isolated fractions of a Gray Luvisol

2006 ◽  
Vol 86 (1) ◽  
pp. 141-151 ◽  
Author(s):  
A. F. Plante ◽  
C. E. Stewart ◽  
R. T. Conant ◽  
K. Paustian ◽  
J. Six
Keyword(s):  
Organic Matter ◽  
Crop Production ◽  
N Fertilization ◽  
Residue Management ◽  
Soil Organic C ◽  
Organic C ◽  
Straw Management ◽  
Soil C ◽  
C Pools

Agricultural management affects soil organic matter, which is important for sustainable crop production and as a greenhouse gas sink. Our objective was to determine how tillage, residue management and N fertilization affect organic C in unprotected, and physically, chemically and biochemically protected soil C pools. Samples from Breton, Alberta were fractionated and analysed for organic C content. As in previous reports, N fertilization had a positive effect, tillage had a minimal effect, and straw management had no effect on whole-soil organic C. Tillage and straw management did not alter organic C concentrations in the isolated C pools, while N fertilization increased C concentrations in all pools. Compared with a woodlot soil, the cultivated plots had lower total organic C, and the C was redistributed among isolated pools. The free light fraction and coarse particulate organic matter responded positively to C inputs, suggesting that much of the accumulated organic C occurred in an unprotected pool. The easily dispersed silt-sized fraction was the mineral-associated pool most responsive to changes in C inputs, whereas the microaggregate-derived silt-sized fraction best preserved C upon cultivation. These findings suggest that the silt-sized fraction is important for the long-term stabilization of organic matter through both physical occlusion in microaggregates and chemical protection by mineral association. Key words: Soil organic C, tillage, residue management, N fertilization, silt, clay

Sea sediments contaminated with heavy metals: metal speciation and removal

1995 ◽  
Vol 32 (9-10) ◽  
pp. 65-73 ◽  
Author(s):  
C. Savvides ◽  
A. Papadopoulos ◽  
K. J. Haralambous ◽  
M. Loizidou
Keyword(s):  
Heavy Metals ◽  
Industrial Waste ◽  
Metal Content ◽  
Metal Speciation ◽  
Acid Solutions ◽  
Significant Percentage ◽  
High Metal Content ◽  
Residual Phase ◽  
High Metal ◽  
Partitioning Procedure

The contamination of sediments with heavy metals may lead to serious environmental problems and in some cases action has to take place for their decontamination. In this work, studies were performed on sediments near the outfall of domestic and industrial waste. The metals examined were Cu, Cr, Ni, Pb, Zn and Fe. Indeed, high metal content was found in the sediments and the contamination factors were quite high, indicating the effect of the nearby discharge of effluents. The results of the application of a sequential extraction partitioning procedure indicated that an important part of the metal content is carried by the residual phase but also a significant percentage is found in the organic and reducible fractions, i.e. in potentially available fractions. Batch extraction experiments using acid solutions of various concentrations and different acid-sediment contact times were performed in order to remove heavy metals from the sediments. For most metals studied, a satisfactory percentage was extracted at low contact times.

scholarly journals Synthesis and properties of metal-carbon nanocomposites Ni/C, Co/C AND Cu/C with high metal content

Surface ◽  
2017 ◽  
Vol 9(24) ◽  
pp. 136-144 ◽  
Author(s):  
V. M. Bogatyrov ◽  
◽  
M. V. Borysenko ◽  
O. I. Oranska ◽  
M. V. Galaburda ◽  
...  
Keyword(s):  
Metal Content ◽  
Carbon Nanocomposites ◽  
High Metal Content ◽  
High Metal
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