M. A. Rashid

Geochemistry of Marine Humic Compounds

• Broschiertes Buch

Produktbeschreibung

Some 90 years ago, the first information on the occurrence of dissolved organic matter in sea water was published. For 50 years after that reve lation, little progress was made in identifying these dissolved "yellow substances." In the 1950s and 1960s, a few chemical oceanographers identified some specific dissolved organic compounds, but few of these pioneers fully appreciated their significance in terms of biological inter actions, metal chelation, or interactions with sedimentary material. When Mohammed Rashid began his work on marine humic compounds in the mid-1960s, he was one of only five scientists who had specifically designed their studies toward understanding the nature of these complex materials. Over the next decade, Dr. Rashid directed his research toward characterization of humic and fulvic compounds in the marine environ ment, the influence of humic substances on the growth of marine phy toplankton, the role of organic matter in complexing metals in sea water and marine sediments, the interaction between humic substances and clay minerals in marine environments, and the influence of organic matter on the geotechnical properties of marine sediments. As if the many papers produced from these scientific investigations were not sufficient, Dr.

Produktdetails

• Verlag: Springer / Springer New York / Springer, Berlin
• Artikelnr. des Verlages: 978-1-4615-7100-1
• Softcover reprint of the original 1st ed. 1985
• Seitenzahl: 316
• Erscheinungstermin: 4. April 2012
• Englisch
• Abmessung: 279mm x 210mm x 18mm
• Gewicht: 809g
• ISBN-13: 9781461571001
• ISBN-10: 1461571006
• Artikelnr.: 36117892

Inhaltsangabe

1 Origin and Distribution of Organic Compounds in the Marine Environment.- Evolution of Life and Development of Organic Matter.- Distribution of Organic Matter in Oceans and on Land.- Nature and Fate of Organic Matter.- Aggregation, Sedimentation, and Distribution of Organic Matter.- Summary.- 2 Humifícation-A Major Biogeochemical Phenomenon.- Nature of Microbial Population.- Chemical Composition of Organisms.- Some Major Cellular Constituents and Products of their Microbial Degradation.- Formation of Humus.- Distribution of Humic Compounds in the Marine Environment.- Summary.- 3 Physico-chemical Characteristics of Marine Humic Compounds.- Major Components of Humic Substances.- Chemical Composition and Characterization.- Some Striking Differences and Similarities in the Physico-chemical Characteristics of Marine and Terrestrial Humic Compounds.- Summary.- 4 Organo-metal Reactions and their Geochemical Significance.- Humus as a Natural Absorbent.- Physico-chemical Properties of Humic Compounds in Relation to Organo-metal Reactions.- Mechanisms of Organo-metal Interactions.- Bonding Strength.- Implications of Organo-metal Reactions.- Research Proposals.- Summary.- 5 Reactions of Humic Compounds with Sedimentary Minerals.- Clay Minerals and their Types.- Physico-chemical Properties of Humic Compounds and Organo-clay Complexes.- Mechanisms of Organo-clay Interactions.- Ramifications of Organo-clay Complexes.- A Few Research Proposals.- Summary and Conclusions.- 6 Diagenetic Transformations of Humic Compounds.- Diagenesis.- Catagenesis.- Metagenesis.- Summary and Conclusions.- 7 Paleo- and Contemporary Environmental Implications of Humic Compounds.- Paleohumus as a Geological Marker and Environmental Indicator.- Potential Application of Humic Acid Geochemistry inSolving.- Contemporary Environmental Concerns.- Summary.- 8 Role of Humic Compounds in Aquatic Productivity.- Biological Conditioning of Sea Water and Primary Productivity.- Humic Compounds and Growth Response of Phytoplankton.- Role of Humic Compounds on the Physiology and Metabolism of Higher Plants.- Possible Mechanisms of the Biological Effect of Humic Compounds.- Ecological Implications.- Research Prospects.- Summary.