This book is written as a reference on organic substances in natural waters and as a supplementary text for graduate students in water chemistry. The chapters address five topics: amount, origin, nature, geochemistry, and characterization of organic carbon. Of these topics, the main themes are the amount and nature of dissolved organic carbon in natural waters (mainly fresh water, although seawater is briefly discussed). It is hoped that the reader is familiar with organic chemistry, but it is not necessary. The first part of the book is a general overview of the amount and general nature of dissolved organic carbon. Over the past 10 years there has been an exponential increase in knowledge on organic substances in water, which is the result of money directed toward the research of organic compounds, of new methods of analysis (such as gas chromatography and mass spectrometry), and most importantly, the result of more people working in this field. Because of this exponential increase in knowledge, there is a need to pull together and summarize the data that has accumulated from many disciplines over the last decade.

Organic geochemistry of natural waters

Organic Matter Characterization

Interactions between mercury and dissolved organic matter––a review

Transport of suspended participate matter is widely recognized to occur in subsurface environments. Field data indicate that viruses, bacteria, and clay minerals can migrate considerable distances and that small particles and macromolecules are implicated in the transport of organic contaminants and radio-nuclides. Furthermore, media permeability can be significantly altered by changes in aqueous chemistry through particle release and capture. Quantitative models for predicting particle transport are available within the water filtration literature that account for the mechanisms of particle-media collisions and the conditions for attachment. Predictions from the filtration models are used to analyze particle migration through porous media at typical groundwater flow velocities. As particles accumulate within media pores, available models become less predictive because of the coupling between particle retention and permeability reduction. An examination of filtration data reveals that retention of a relatively small solid volume within media pores can reduce media permeability by orders of magnitude. The fact that contaminants adsorbed to particles are mobile has important implications in understanding and predicting contaminant transport. The design of laboratory experiments and the collection of field samples often neglect contaminants transported by suspended colloids and particles.

Particle transport through porous media

http://library.um.ac.id/free-contents/downloadpdf.php/buku/complexation-reactions-in-aquatic-systems-an-analytical-approach-j-buffle-translators-s-p-kounaves-a-kounaves-and-r-s-altman-12623.pdf

Complexation reactions in aquatic systems : an analytical approach / J. Buffle, translators S.P. Kounaves, A. Kounaves and R.S. Altman

Copper(II) titration of fulvic acid ligand sites with theoretical, potentiometric, and spectrophotometric analysis

The fulvic acid molecular weight fraction studied has two general types of carboxyl groups, one of which is ortho to phenolic —OH groups. The number of each type per gram of fulvic acid has been me...

Titration curves of fulvic acid: the analytical chemistry of a weak acid polyelectrolyte'

Cu2+ reacts with fulvic acid to form a site-bound chelate on the fulvic acid polymer molecules. It is deduced from literature evidence that this chelate is the same type that Cu2+ forms with salicy...

Cu2+ – fulvic acid chelation equilibrium in 0.1 m KCl at 25.0 °C

Gran's functions corrected for buffering and H2O dissociation have been incorporated into the iterative calculation for the two equivalence points and the acid dissociation equilibria. The experime...

Potentiometric Titration of Fulvic Acid: Equivalence Point Calculations and Acidic Functional Groups

Conditional stability constants of some metal fulvate complexes have been determined at 25 C using specific ion electrodes. In aqueous 0.1 M NaNO3, solution, the log K values are: 4.86 and 5.08 at pH 3 and 4 for mercury complexes; 3.04 and 3.64 at pH 4.9 and 5.95 for cadmium complexes; and 3.22, 3.72, and 4.35 at pH 3, 4, and 5 for copper complexes. In 0.04 M NaNO3 solution, the log K value for mercury–fulvic acid system is 5.12 at pH 3.1. The order of metal affinity toward fulvic acid Hg > Cu > Cd is in general agreement with the literature for complexing of these metals with similar type donors.

Donald S. Gamble

Papers

Copper(II) titration of fulvic acid ligand sites with theoretical, potentiometric, and spectrophotometric analysis

Titration curves of fulvic acid: the analytical chemistry of a weak acid polyelectrolyte'

Cu2+ – fulvic acid chelation equilibrium in 0.1 m KCl at 25.0 °C

Potentiometric Titration of Fulvic Acid: Equivalence Point Calculations and Acidic Functional Groups

METAL-FULVIC ACID CHELATION EQUILIBRIUM IN AQUEOUS NaNO3 SOLUTION. Hg(II), Cd(II), AND Cu(II) FULVATE COMPLEXES