Extraction of polychlorinated biphenyl with supercritical carbon dioxide, sulfur hexafluoride and subcritical water

2000 ◽  
Vol 367 (1) ◽  
pp. 89-90 ◽  
Author(s):  
Simone Pross ◽  
Wolfgang Gau ◽  
B. W. Wenclawiak
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Sulfur Hexafluoride ◽  
Polychlorinated Biphenyl ◽  
Subcritical Water ◽  
Supercritical Carbon

scholarly journals Subcritical and supercritical fluid extraction of heavy metals from sand and sewage sludge

2013 ◽  
Vol 78 (7) ◽  
pp. 1013-1022 ◽  
Author(s):  
Erdal Yabalak ◽  
Murat Gizir
Keyword(s):  
Carbon Dioxide ◽  
Sewage Sludge ◽  
Supercritical Carbon Dioxide ◽  
Inductively Coupled Plasma ◽  
Subcritical Water ◽  
Chelating Agent ◽  
Dynamic Mode ◽  
Subcritical Water Extraction ◽  
Real Samples ◽  
Supercritical Carbon

Demetalization of Pb, Ni, Zn, Cu and Cr heavy metal ions from sea sand and real samples of sewage sludge by subcritical water and supercritical carbon dioxide was investigated. Experimental parameters such as temperature, pressure, extraction time in the static and dynamic mode and sampling were optimized in order to determine the suitable conditions for high metals removal. The best extraction efficiencies were obtained by using acetyl acetonate as chelating agent in both subcritical water and supercritical CO2 extractions for real and artificial samples. Samples collected from extraction system using both subcritical water and supercritical carbon dioxide were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The highest recoveries (%) obtained from real samples for Cr, Cu, Ni, Pb and Zn were 77.25, 95.1, 84.82, 94.92 and 98.39, respectively, with the chelating agent in the subcritical water extraction.

scholarly journals Subcritical water and supercritical carbon dioxide: efficient and selective eco-compatible solvents for coffee and coffee by-products valorization

2020 ◽  
Vol 22 (24) ◽  
pp. 8544-8571
Author(s):  
Alexandre Vandeponseele ◽  
Micheline Draye ◽  
Christine Piot ◽  
Gregory Chatel
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Subcritical Water ◽  
State Of The Art ◽  
The State ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
By Products ◽  
Supercritical Carbon

This review aims to establish the state of the art of the existing literature on the valorization of coffee and coffee by-products such as spent coffee grounds through the use of subcritical water (SCW) and supercritical carbon dioxide (SC-CO2).

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