Humic acid-inspired hybrid materials as heavy metal absorbents

2010 ◽  
Vol 351 (1) ◽  
pp. 239-247 ◽  
Author(s):  
Panagiota Stathi ◽  
Yiannis Deligiannakis
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Hybrid Materials

Heavy metal extraction from an artificially contaminated sandy soil under EDDS deficiency: Significance of humic acid and chelant mixture

Chemosphere ◽  
2010 ◽  
Vol 80 (4) ◽  
pp. 416-421 ◽  
Author(s):  
Theo C.M. Yip ◽  
Dickson Y.S. Yan ◽  
Matthew M.T. Yui ◽  
Daniel C.W. Tsang ◽  
Irene M.C. Lo
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Sandy Soil ◽  
Metal Extraction ◽  
Heavy Metal Extraction

Humic Colloid Generation of Transuranic Elements in Groundwater and Their Migration Behaviour

1986 ◽  
Vol 84 ◽  
Author(s):  
J.I. Kim ◽  
G. Buckau ◽  
W. Zhuang
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Metal Ions ◽  
Fulvic Acid ◽  
Photoacoustic Spectroscopy ◽  
Heavy Metal Ions ◽  
Colloidal Form ◽  
Doc Concentration

AbstractThe generation of humic colloids of Am(III) has been investigated in Gorleben groundwaters containing different amounts of humic substances. Dissolved organic carbon (DOC) in these groundwaters consists mainly of humic acid and fulvic acid, which is present in a colloidal form through aggregation with trace heavy metal ions of groundwater constituents. Concentrations of these heavy metal ions are proportional to the DOC concentration. The generation of Am(III) pseudocolloids through geochemical interactions with humic colloids in different groundwaters is quantified by ultrafiltration as well as ultracentrifugation by the aid of radiometric concentration measurements. The speciation of dissolved Am(III) species in groundwaters is carried out by laser induced photoacoustic spectroscopy (LPAS).

Adsorption of Heavy Metal Ions onto Insolubilized Humic Acid

1995 ◽  
Vol 171 (2) ◽  
pp. 490-494 ◽  
Author(s):  
Hideshi Seki ◽  
Akira Suzuki
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Metal Ions ◽  
Heavy Metal Ions

Application of the NICA-Donnan model for proton, copper and uranyl binding to humic acid

2004 ◽  
Vol 92 (9-11) ◽  
Author(s):  
Takumi Saito ◽  
S. Nagasaki ◽  
S. Tanaka ◽  
L. K. Koopal
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Electrostatic Interactions ◽  
Competitive Adsorption ◽  
Copper Ions ◽  
Ion Binding ◽  
Uranyl Ions ◽  
Soil Systems ◽  
Actinide Ions ◽  
Donnan Model

SummaryHumic acids are natural organic materials that play an important role in the migration of heavy metal and actinide ions in aquatic and soil systems. In the present study, the binding of protons, copper ions and uranyl ions to the purified Aldrich humic acid (PAHA) is investigated and the results are modeled with the Non-Ideal Competitive Adsorption (NICA) model extended with electrostatic interactions according to the Donnan model (NICA-Donnan model). The NICA part of the model enables one to describe the competitive ion binding to a heterogeneous substrate taking into account a different stoichiometry per ion. The NICA-Donnan model can describe the binding of the ions to PAHA in large concentration ranges (3<pH<11; 3<pCu<13; 4<pUO

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