Soil Humic Substances

Part 1. Lignin, Humic Substances and Coal
Prof. Dr. Nicola Senesi

Prof. Dr. Nicola Senesi

Università degli Studi di Bari, Dipartimento di Biologia e Chimica Agroforestale ed Ambientale, Via Amendola 165/A, Bari, Italy, 70126

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Dr. Elisabetta Loffredo

Dr. Elisabetta Loffredo

Università degli Studi di Bari, Dipartimento di Biologia e Chimica Agroforestale ed Ambientale, Via Amendola, 165/A, Bari, Italy, 70126

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First published: 15 January 2005
Citations: 6

Abstract

  • Introduction
  • Genesis
    • The Lignin-Protein Theory
    • The Sugar-Amine Theory
    • The Polyphenol Theory
  • Extraction, Fractionation and Purification
    • Extraction Methods
      • Alkaline Solvents
      • Aqueous Salt Solutions
      • Other Extractants and Extraction Procedures
    • Fractionation Procedures
      • Fractionation Based on pH Adjustment, Solubilization and Precipitation
      • Fractionation Based on Molecular Size
      • Fractionation Based on Charge Characteristics
      • Fractionation Based on Adsorption
    • Purification Procedures
    • Sequential Extraction/Fractionation Procedures
    • Comprehensive Isolation Procedure Proposed by the IHSS
  • Chemical Composition, Properties and Structure
    • Elemental Composition
    • Functional Groups
    • Charge Characteristics and Cation Exchange Capacity
    • Molecular Weight, Size and Shape
      • Molecular Weight
      • Molecular Size and Shape
    • Structural Components
      • Degradative Chemical Methods
      • Degradative Thermal Techniques
      • Spectroscopic Methods
    • Molecular Models
    • Fractal Nature
  • Soil Fertility Functions
    • Physical Functions
    • Chemical Functions
    • Nutritional Aspects
    • Biological Actions
  • Environmental Functions
    • Interactions with Organic Pollutants
      • Adsorption and Partitioning
      • Solubilization Effects
      • Hydrolysis Catalysis
      • Photosensitization
    • Interactions with Trace Metals
      • Quantitative Aspects
      • The Spectroscopic Approach
  • Summary and Concluding Remarks

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