Cation binding by humic substances / Edward Tipping.

Format:

Book

Author/Creator:

Tipping, Edward, 1948- author.

Series:

Cambridge environmental chemistry series ; 12.

Cambridge environmental chemistry series ; 12

Language:

English

Subjects (All):

Humic acid--Derivatives.

Humic acid.

Cations.

Ligand binding (Biochemistry)--Mathematical models.

Ligand binding (Biochemistry).

Physical Description:

1 online resource (x, 434 pages) : digital, PDF file(s).

Edition:

1st ed.

Place of Publication:

Cambridge : Cambridge University Press, 2002.

Language Note:

English

Summary:

Humic substances are highly-abundant organic compounds formed in soils and sediments by the decay of dead plants, microbes and animals. This book focuses on the important binding properties of these compounds which regulate the chemical reactivity and bioavailability of hydrogen and metal ions in the natural environment. Topics covered include the physico-chemical properties of humic matter and interactions of protons and metal cations with weak acids and macromolecules. Experimental laboratory methods are also discussed, together with mathematical modelling. Finally the author looks at how the results of this research can be used to interpret environmental phenomena in soils, waters and sediments. This comprehensive account of cation binding by humic matter is a valuable resource for advanced undergraduate and graduate students, environmental scientists, ecologists and geochemists.

Contents:

Natural organic matter and humic substances

Isolation and classification of humic substances

Formation and decomposition of humic substances

Chemical and physical properties of humic substances

Environmental concentrations of humic substances

Humic substances

accident or design?

Environmental solution and surface chemistry

Solutions and solutes

Natural particulate matter

Physico-chemical interactions in environmental aqueous systems

Equilibrium and kinetics

Chemical speciation

Calculation of equilibrium concentrations

Proton dissociation from weak acids

Acids and bases

Buffering

Kinetics

Diprotic acids

Extension to higher polyprotic acids

Electrostatic interactions among sites

Proton dissociation from well-defined polymers

Proton dissociation from humic substances

Metal-ligand interactions

Coordination

Chemical equilibria involving metal ions, protons and simple weak acid ligands

Multisite ligands

Electrostatic interactions

Results with well-defined macromolecules

Methods for measuring cation binding by humic substances

The humic sample

Determination of proton binding by potentiometry

Analytical determination of acid group contents

Direct measurement of equilibrium metal binding

principles

Separation methods to quantify equilibrium metal binding

Competition methods

Electrochemical techniques

Spectroscopic methods

Measurement of the kinetics of metal-humic interactions.

Notes:

Title from publisher's bibliographic system (viewed on 05 Oct 2015).

Includes bibliographical references (p. [391]-421) and index.

ISBN:

1-107-11480-2

1-280-42939-9

9786610429394

0-511-17660-0

0-511-03997-2

0-511-15749-5

0-511-32968-7

0-511-53559-7

0-511-05038-0

OCLC:

475915542