Impact of sewage sludge spreading on nickel mobility in a calcareous soil: adsorption–desorption through column experiments

2012 ◽  
Vol 20 (7) ◽  
pp. 4414-4423 ◽  
Author(s):  
Yannick Mamindy-Pajany ◽  
Stéphanie Sayen ◽  
Emmanuel Guillon
Keyword(s):  
Sewage Sludge ◽  
Calcareous Soil ◽  
Column Experiments ◽  
Soil Adsorption ◽  
Adsorption Desorption

scholarly journals Synthesis and characterization of Mo2 C based materials over activated carbon derived from sewage sludge pyrolysis for catalytic applications

Cerâmica ◽  
2018 ◽  
Vol 64 (370) ◽  
pp. 148-155
Author(s):  
A. C. Alexandrino ◽  
J. F. de Sousa ◽  
C. P. de Souza ◽  
C. P. B. de Araújo ◽  
M. V. M. Souto
Keyword(s):  
Sewage Sludge ◽  
Surface Area ◽  
Synthesis Method ◽  
Metal Catalyst ◽  
Catalytic Material ◽  
Metal Support ◽  
Size Evaluation ◽  
Adsorption Desorption ◽  
Substitute Materials

Abstract Transition metal carbides have been successfully used as substitute materials for conventional noble metal catalyst in several important industrial reactions due to their interesting physicochemical properties. Surface structure, chemical composition and metal-support interactions, as well as processing conditions, are of utmost importance in the use of such materials in catalysis. The present study aimed to synthesize and evaluate pure molybdenum carbide with and without support, and bimetallic Mo-Ni carbide over a carbon active support derived from sewage sludge pyrolysis. The support was chemically (KOH) and physically (thermal treatment) activated before use. TG/DTG, XRD, XRF, SEM, BET and particle size evaluation were performed, together with adsorption/desorption isotherms. Results indicated that the applied synthesis method was adequate for the obtainment of pure materials. The increase in surface area of the support was significant, from 13 to 141 m².g-1 after the thermal and chemical treatment; also, supporting Mo2C over carbon provided an increase from 45 to 73 m².g-1 in surface area, which indicated its potential as a catalytic material as well as the effectiveness of the applied methodology.

Comparison of batch, stirred flow chamber, and column experiments to study adsorption, desorption and transport of carbofuran within two acidic soils

Chemosphere ◽  
2012 ◽  
Vol 88 (1) ◽  
pp. 106-112 ◽  
Author(s):  
Alipio Bermúdez-Couso ◽  
David Fernández-Calviño ◽  
Isabel Rodríguez-Salgado ◽  
Juan Carlos Nóvoa-Muñoz ◽  
Manuel Arias-Estévez
Keyword(s):  
Flow Chamber ◽  
Column Experiments ◽  
Acidic Soils ◽  
Adsorption Desorption

Influence and Mechanism of Different pH Values of Extractant on the Leachability of Heavy Metals in Industrial Sewage Sludge

2011 ◽  
Vol 197-198 ◽  
pp. 1000-1004 ◽  
Author(s):  
Jing Yong Liu ◽  
Shui Yu Sun ◽  
Yan Bin Xu ◽  
Li Zheng ◽  
Shao Song Huang
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Extraction Procedure ◽  
Leaching Tests ◽  
Ph Values ◽  
Leaching Toxicity ◽  
Co Precipitation ◽  
Adsorption Desorption ◽  
Industrial Sewage ◽  
Industrial Sewage Sludge

The leaching tests of heavy metals in industrial sewage sludge were carried out under different pH of extractant by the solid waste extraction procedure for leaching toxicity (GB5086.2-1997) of China on the base of the contents and fractions of Zn, Cu, Pb, Cr, Mn and Ni elements. The results showed that the sludge was with higher levels of Mn and Zn, followed by Cu and Ni, while the higher toxicity of Pb and Cr was lower. The fractions of different elements in the sewage sludge had very different forms. The potential migration and biological toxicity were a concern for the active forms of Zn, Mn, Ni, Cr because their active proportions were more than 50%. The pH of extraction solutions had an important impact on the leaching of heavy metals in sewage sludge. The largest concentrations of Zn, Mn, Ni, Cu were appeared when the pH of extractant was about 7, but that of Fe had a greater fluctuation at the same pH. The concentrations of heavy metals had very different at different pH values, which may be related with the process of adsorption/desorption, complexation/dissociation, the dissolution/precipitation/co-precipitation and other chemical reactions in the extractant process.

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