CHEMICAL AND BIOLOGICAL STUDIES ON ENVIRONMENTAL HUMIC ACIDS : I. Composition of Elemental and Functional Groups of Humic Acids
スポンサーリンク
概要
- 論文の詳細を見る
Forty humic acid samples were extracted from various types of soils, including aquatic sediments. To estimate the degree of humification, absorbance coefficients for 1% humic acid solutions at 600 nm (E^<1%>_<600>) and Δ log K values were measured. Mean values for E^<1%>_<600> decreased in the order: Andisol (A)>Oxisol (O), Mollisol (M), Vertisol (V)>Histosol (H)>Entisol (E), sediment (s), Inceptisol (I). Mean values for Δ log K increased in the order: A<M, V, O<s, I, E<H. Andisol and sediment humic acids showed the highest and lowest degrees of humification, respectively. Linear correlation was found to be significant between log E^<1%>_<600> and Δ log K. The elemental composition of the various types of humic acids was compared. Andisol humic acids contained a large amount of carbon and a small amount of hydrogen and nitrogen. Hydrogen and nitrogen contents of aquatic humic acids were higher than those of the terrestrial humic acids. Mean values for the H/C ratio decreased in the order: sI, E, O, HM, VA. A linear correlation was found to be significant between the H/C and N/C ratios. The lower the H/C ratios, the higher the E^<1%>_<600> values and therefore also the degree of humification. In the graph of H/C versus O/C, sediment and Entisol humic acids were placed in the area near plankton and plants. Andisol humic acids fell to the right of the coal band (i.e., had higher O/C ratio). As the demethanation and dehydration reactions lead to the decrease of the H/C ratio, the aliphatic and proteinoid parts are split off from the humic molecules and dehydrative condensation takes place in the humification process. Each source of humic acid was analyzed for the content of carboxyl, low pK_a carboxyl (COOH_s), carbonyl, phenolic, and alcoholic hydroxyl groups. Andisol humic acids were rich in carboxyl and carbonyl groups and poor in alcoholic hydroxyl groups. Entisol humic acids had low carboxyl and carbonyl contents. It is noteworthy that sediment humic acids had relatively high carboxyl and carbonyl contents. Linear correlations were found to be significant between COOH and COOH_s, and COOH and C=O. E^<1%>_<600> values showed significant positive and negative linear correlations with the carboxyl and alcoholic hydroxyl groups, respectively.
- 社団法人日本土壌肥料学会の論文
著者
-
Yonebayashi Koyo
Faculty of Agriculture, Kyoto Prefectural Unirersity
-
Hattori Tomoo
Faculty of Agriculture, Kyoto Prefectural University
-
Hattori T
Kyoto Prefectural Univ. Kyoto Jpn
-
Hattori Tomoo
Faculty Of Agriculture Kyoto Prefectural University
-
Yonebayashi Koyo
Faculty Of Agriculture Kyoto Prefectural University
関連論文
- N Mineralization Process of the Surface Soils under Shifting Cultivation in Northern Thailand
- Labile Pools of Organic Matter and Microbial Biomass in the Surface Soils under Shifting Cultivation in Northern Thailand
- Soil Ecological Study on Dynamics of K, Mg, and Ca, and Soil Acidity in Shifting Cultivation in Northern Thailand
- Ecological Study on the Dynamics of Soil Organic Matter and Its Related Properties in Shifting Cultivation Systems of Northern Thailand
- Physicochemical Properties of the Soils Associated with Shifting Cultivation in Northern Thailand with Special Reference to Factors Determining Soil Fertility
- GROWTH SPIRALS ON ETCHED KAOLINITE CRYSTALS
- Characteristics of Humic Substances and Dynamics of Dissolved Organic Matter in Forest Soils in Northern Kyoto with Special Reference to Their Pedogenetic Processes
- AN ELECTRON MICROSCOPIC INVESTIGATION ON PARTICLE ASSOCIATION BETWEEN IMOGOLITE AND OTHER CLAY MINERALS IN MIXED SUSPENSIONS
- Identification of Organically Bound Iodine in Soil Humic Substances by Size Exclusion Chromatography / Inductively Coupled Plasma Mass Spectrometry (SEC / ICP-MS)
- Speciation of Iodine in Soils
- Chemical Alterations of Tropical Peat Soils Determined by Waksman's Proximate Analysis and Properties of Humic Acids
- Distribution of Heavy Metals among Different Bonding Forms in Tropical Peat Soils
- DISTRIBUTION OF ORGANIC FORMS OF NITROGEN IN PADDY SOILS IN TROPICAL AND TEMPERATE REGIONS
- Selective Determination and Formation of Elemental Selenium in Soils
- CHEMICAL AND BIOLOGICAL STUDIES ON ENVIRONMENTAL HUMIC ACIDS : II. ^1H-NMR and IR Spectra of Humic Acids
- Cupric Oxide Oxidation Products of Tropical Peat Soils(Soil Chemistry and Mineralogy)
- Impregnation of Peat Soils Using Polyethylene Glycol 4000 for the Preparation of Thin Sections
- Nutritional Environment of Tropical Peat Soils in Sarawak, Malaysia Based on Soil Solution Composition
- CHEMICAL AND BIOLOGICAL STUDIES ON ENVIRONMENTAL HUMIC ACIDS : I. Composition of Elemental and Functional Groups of Humic Acids
- IMPROVEMENTS IN THE METHOD FOR FRACTIONAL DETERMINATION OF SOIL ORGANIC NITROGEN
- PATTERNS AND FACTORS CONTROLLING NITROGEN MINERALIZATION IN PADDY SOILS IN TROPICAL AND TEMPERATE REGIONS
- INTERCALATION INDEX WITH HYDRAZINE, MORPHOLOGY AND SURFACE MICROTOPOGRAPHY OF KAOLINITIC CLAYS IN THE TROPICAL ASIAN SOILS
- USE OF THE AMMONIA ELECTRODE FOR ANALYZING ORGANIC NITROGEN DISTRIBUTION
- Verification of the Prediction Technique for the Amount of Adsorbed Linuron on Soils
- CLAY MINERALS IN CLAY-WATER SYSTEM AS VIEWED BY FREEZE ETCHING
- Role of Dissolved Organic Matter in Translocation of Nutrient Cations from Organic Layer Materials in Coniferous and Broad Leaf Forests
- Quantitative Relationship between Soil Properties and Adsorption of Dissolved Organic Matter onto Volcanic Ash and Non-Volcanic Ash Soils
- Studies on sustainable land use and soil ecosystems in tropical peat land
- Relationship between Freundlich Isotherm Coefficients, log K_F and 1/n for Atrazine Desorption from Soils in Japan (Soil Chemistry and Mineralogy)
- Chemical Forms and Stability of Selenium in Soil
- Nitrogen Mineralization of Silk Waste Applied to Soil under Aerobic Conditions
- Acidic Properties of Dissolved Organic Matter Leached from Organic Layers in Temperate Forests
- Speciation of Selenium in Soil
- Selenium in Soil Humic Acid
- Selenium Content and Distribution in Various Japanese Soils
- ON THE PERCOLATION CONTROL OF WATER BY BENTONITE IN VOLCANIC ASH SOILS
- SOME CHEMICAL AND MINERALOGICAL STUDIES ON PROFILES OF DRY RICE FIELDS OF POLDER LAND IN KOJIMA BASIN, OKAYAMA PREFECTURE