scholarly journals The effects of soil mineral phases on the abiotic degradation of selected organic compounds. [Tetraphenylboron]

1992 ◽  
Author(s):  
S.S. Sandu
Keyword(s):  
Organic Compounds ◽  
Soil Mineral ◽  
Abiotic Degradation ◽  
Mineral Phases

Heavy metal retention by soil mineral phases during a potential soil contamination by sewage sludge

2006 ◽  
Vol 25 (S1) ◽  
pp. 194-195
Author(s):  
Péter Sipos ◽  
Tibor Németh ◽  
Viktória Kovács Kis ◽  
Ilona Mohai
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Soil Contamination ◽  
Soil Mineral ◽  
Metal Retention ◽  
Mineral Phases

Sorption of copper, zinc and lead on soil mineral phases

Chemosphere ◽  
2008 ◽  
Vol 73 (4) ◽  
pp. 461-469 ◽  
Author(s):  
Péter Sipos ◽  
Tibor Németh ◽  
Viktória Kovács Kis ◽  
Ilona Mohai
Keyword(s):  
Soil Mineral ◽  
Mineral Phases ◽  
Copper Zinc

scholarly journals Treatment of leachates in hightech systems

2019 ◽  
pp. 29-38
Author(s):  
Ulrika Welander
Keyword(s):  
Heavy Metals ◽  
Chemical Composition ◽  
Organic Compounds ◽  
Treatment Process ◽  
Organic Substances ◽  
Single Treatment ◽  
Degradation Processes ◽  
Abiotic Degradation ◽  
High Concentrations

Leachates are complex wastewaters, which often contain high concentrations of ammoniwnions, refractory organic compounds as well as heavy metals. The composition of the leachateis a function of the kind of waste that has been deposited at the landfill. Furthermore,substances created during microbial and abiotic degradation processes of the waste will beeluted from the landfill. It is therefore difficult to determine the chemical composition of aleachate especially in regard to organic substances. Leachates from different landfills differ incomposition. No single treatment process is therefore suitable for all leachates. The processhas to be optimised for the specific leachate, which will be treated.

The Tempo and mode(S) of Prebiotic Evolution

1997 ◽  
Vol 161 ◽  
pp. 419-429 ◽  
Author(s):  
Antonio Lazcano
Keyword(s):  
Origin Of Life ◽  
Organic Compounds ◽  
Biological Evolution ◽  
Current Evidence ◽  
Early Diversification ◽  
Time Period ◽  
The Galaxy ◽  
History Of ◽  
Widespread Phenomenon ◽  
The Origin Of Life

AbstractDifferent current ideas on the origin of life are critically examined. Comparison of the now fashionable FeS/H2S pyrite-based autotrophic theory of the origin of life with the heterotrophic viewpoint suggest that the later is still the most fertile explanation for the emergence of life. However, the theory of chemical evolution and heterotrophic origins of life requires major updating, which should include the abandonment of the idea that the appearance of life was a slow process involving billions of years. Stability of organic compounds and the genetics of bacteria suggest that the origin and early diversification of life took place in a time period of the order of 10 million years. Current evidence suggest that the abiotic synthesis of organic compounds may be a widespread phenomenon in the Galaxy and may have a deterministic nature. However, the history of the biosphere does not exhibits any obvious trend towards greater complexity or «higher» forms of life. Therefore, the role of contingency in biological evolution should not be understimated in the discussions of the possibilities of life in the Universe.

Automated mineral analysis in TASK8

1990 ◽  
Vol 48 (2) ◽  
pp. 212-213
Author(s):  
William F. Chambers ◽  
Arthur A. Chodos ◽  
Roland C. Hagan
Keyword(s):  
National Laboratory ◽  
Control Program ◽  
Mineral Analysis ◽  
Alamos National Laboratory ◽  
Mineral Phase ◽  
Los Alamos National Laboratory ◽  
California Institute Of Technology ◽  
Mineral Phases ◽  
Letter Code ◽  
Institute Of Technology

TASK8 was designed as an electron microprobe control program with maximum flexibility and versatility, lending itself to a wide variety of applications. While using TASKS in the microprobe laboratory of the Los Alamos National Laboratory, we decided to incorporate the capability of using subroutines which perform specific end-member calculations for nearly any type of mineral phase that might be analyzed in the laboratory. This procedure minimizes the need for post-processing of the data to perform such calculations as element ratios or end-member or formula proportions. It also allows real time assessment of each data point.The use of unique “mineral codes” to specify the list of elements to be measured and the type of calculation to perform on the results was first used in the microprobe laboratory at the California Institute of Technology to optimize the analysis of mineral phases. This approach was used to create a series of subroutines in TASK8 which are called by a three letter code.

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