Effective Affinity Distribution for the Binding of Metal Ions to a Generic Fulvic Acid in Natural Waters

2009 ◽  
Vol 43 (19) ◽  
pp. 7184-7191 ◽  
Author(s):  
Carlos Rey-Castro ◽  
Sandrine Mongin ◽  
César Huidobro ◽  
Calin David ◽  
José Salvador ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fulvic Acid ◽  
Natural Waters ◽  
Affinity Distribution

Rates of Reaction of Dissolved Oxygen With Scavengers in Sweet and Sour Brines

CORROSION ◽  
1969 ◽  
Vol 25 (10) ◽  
pp. 397-404 ◽  
Author(s):  
E. S. SNAVELY ◽  
F. E. BLOUNT
Keyword(s):  
Transition Metal ◽  
Dissolved Oxygen ◽  
Metal Ions ◽  
Induction Period ◽  
Natural Waters ◽  
Reaction Rate ◽  
Transition Metal Ions ◽  
Zero Order ◽  
Laboratory Apparatus ◽  
High Ph

Abstract Rates of reaction of dissolved oxygen with H2S were measured in a laboratory apparatus using a polarographic type instrument for the measurement of oxygen concentrations. Results show that oxidation occurs only at high pH in the absence of catalytic species. The reaction is catalyzed by transition metal ions in the order Ni++>Co ++>Mn++>Cu++>Fe++. In all cases, the reaction rate increases with pH and is at first complex but becomes zero-order with respect to oxygen after a brief induction period. Some natural waters contain sufficient catalysts that additional amounts are not required for scavenging O2 with SO2 or Na2SO3. Sour waters cannot be scavenged with SO2 or Na2SO3 because of ineffectiveness of catalysts.

Complexation of Dissolved Organic Matter with Trace Metal Ions in Natural Waters

2012 ◽  
pp. 769-849 ◽  
Author(s):  
Khan M. G. Mostofa ◽  
Cong-qiang Liu ◽  
Xinbin Feng ◽  
Takahito Yoshioka ◽  
Davide Vione ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Trace Metal ◽  
Metal Ions ◽  
Natural Waters ◽  
Trace Metal Ions

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).

Semi-quantitative determination of fulvic acid, tannin and lignin in natural waters

1980 ◽  
Vol 14 (4) ◽  
pp. 373-377 ◽  
Author(s):  
J. Lawrence
Keyword(s):  
Quantitative Determination ◽  
Fulvic Acid ◽  
Natural Waters

The State of Metal Ions in Natural Waters

1984 ◽  
Vol 12 (4) ◽  
pp. 335-361 ◽  
Author(s):  
P. N. Linnik ◽  
B. I. Nabivanets
Keyword(s):  
Metal Ions ◽  
Natural Waters ◽  
The State

An Equilibrium Model for the Nta Complexation of Metal Ions in Natural Waters

1971 ◽  
Vol 2 (3) ◽  
pp. 121-129 ◽  
Author(s):  
W. A. Cilley ◽  
D. A. Nicholson
Keyword(s):  
Metal Ions ◽  
Equilibrium Model ◽  
Natural Waters

Reactions of fulvic acid with metal ions

1981 ◽  
Vol 15 (1) ◽  
Author(s):  
M. Schnitzer ◽  
H. Kerndorff
Keyword(s):  
Metal Ions ◽  
Fulvic Acid

Heavy Metal Binding Components of River Water

1975 ◽  
Vol 32 (10) ◽  
pp. 1755-1766 ◽  
Author(s):  
S. Ramamoorthy ◽  
D. J. Kushner
Keyword(s):  
Heavy Metal ◽  
Fulvic Acid ◽  
River Water ◽  
Metal Binding ◽  
Natural Waters ◽  
Binding Capacity ◽  
Binding Constants ◽  
Binding Ability ◽  
Ottawa River ◽  
Almost All

Ion-specific electrodes were used to measure the heavy metal (HM) binding capacity of river waters near Ottawa. Binding capacity was measured in unfiltered water and in water passed through filters retaining particles (0.45 μm) and macromolecules of molecular weight (MW) 45,000, 16,000 and 1,400. In the most studied water samples, almost all the Hg2+-binding ability passed through the smallest filter. Filters of different pore sizes retained substantial fractions of the binding ability towards other HM ions. Binding strengths and conditional binding constants were calculated for each HM ion and low MW Ottawa River water components.Binding in Ottawa River water was not due to HCO3− or CO32− ions; in the Rideau Canal, and probably in other bodies of water, such ions caused a substantial amount of binding. After complete ashing of Ottawa River water and reconstitution with deionized water almost all the HM binding ability was lost; thus, an organic compound(s) is responsible for binding.The binding pattern towards different HM ions of fulvic acid isolated from soil was different from that of unfiltered or filtered Ottawa River water. Fulvic acid is not the sole binding component of this water. These experiments suggest a way of assessing the importance of fulvic acid and other humic substances in HM binding by natural waters.

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