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.

Environmental application of an industrial waste as catalyst for the electro-Fenton-like treatment of organic pollutants

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14416-14424 ◽  
Author(s):  
Elena Alfaya ◽  
Olalla Iglesias ◽  
Marta Pazos ◽  
Maria Angeles Sanromán
Keyword(s):  
Acid Mine Drainage ◽  
Organic Pollutants ◽  
Industrial Waste ◽  
Metal Content ◽  
Mine Drainage ◽  
Environmental Application ◽  
Acid Mine ◽  
High Metal Content ◽  
High Metal

The application of acid mine drainage sludge (AMDS), an industrial waste with high metal content, as catalyst for the electro-Fenton-like technology on the treatment of organic polluted effluents has been investigated.

Microalgae

2018 ◽  
pp. 141-153
Author(s):  
Vinod Kumar ◽  
Manisha Nanda
Keyword(s):  
Heavy Metals ◽  
Metal Content ◽  
High Quality ◽  
Ecological Services ◽  
High Metal Content ◽  
Living Things ◽  
High Metal ◽  
Living Organisms ◽  
Micro Organisms ◽  
Micro Pollutants

The primary functions of ecosystems, wherever located, or whatever their constituents on earth, are to sustain life. They provide vital needs, commonly described as “ecological services,” for all the living things residing within that particular system, or for those on its fringes. Such services include shelter, food, maintaining soils and hydrology, and providing livelihoods for its dwellers. Water is considered an important resource for mankind and other living organisms. Therefore, maintaining the water to a high quality is crucial. Bioremediation of heavy metals and micro pollutants by microorganisms (algae, bacteria, fungi, and yeast) has been used for the last two decades. All micro-organisms and microalgae are gaining increasing attention because microalgae can easily grow and is cheap to process and able to accumulate high metal content.

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

Stimulation of Biological Uptake of Heavy Metals

1992 ◽  
Vol 26 (1-2) ◽  
pp. 227-236 ◽  
Author(s):  
S. Ghosh ◽  
S. Bupp
Keyword(s):  
Heavy Metals ◽  
Metal Binding ◽  
Metal Uptake ◽  
Metal Removal ◽  
Ternary Mixtures ◽  
High Metal Content ◽  
Chemostat Cultures ◽  
Binary And Ternary Mixtures ◽  
High Metal

This research was conducted to investigate the relative capabilities of unacclimated, acclimated, and cysteine-cystine-stimulated aerobic cultures to remove heavy metals. Loss of organism viability was observed at metal concentrations above 30 mg/L, however, loss of cell viability did not affect metal uptake. Metal-complexing capacities from 0.041 to 2.13 mg/mg protein were observed. Metal removal from binary and ternary mixtures exceeded those of single metals. Surprisingly, culture acclimation resulted in reduced metal uptake. However, a cysteine-cystine-stimulated culture had substantially increased metal-removal capabilities possibly due to the synthesis of metallothionein-like proteins. Biopolymers of the unacclimated organisms had an affinity for metal binding of the order: Cu > Pb > Cd. This research points to the feasibility of in-vitro detoxification of high metal-content hazardous wastes by cell materials derived from cysteine-cystine-stimulated chemostat cultures. Coupling in-vitro metal complexation with metal leaching from biosolids could provide an opportunity for recycling hazardous heavy metals.

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

scholarly journals High Metal Content of Highly Accreting Quasars

2021 ◽  
Vol 910 (2) ◽  
pp. 115
Author(s):  
Marzena Śniegowska ◽  
Paola Marziani ◽  
Bożena Czerny ◽  
Swayamtrupta Panda ◽  
Mary Loli Martínez-Aldama ◽  
...  
Keyword(s):  
Metal Content ◽  
High Metal Content ◽  
High Metal
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