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Author : Nicklas Paxéus
Publisher : Unknown
Page : 78 pages
File Size : 45,5 Mb
Release : 1985
Category : Electronic
ISBN : 917032185X
Author : Dag Hessen,Lars J. Tranvik
Publisher : Springer Science & Business Media
Page : 350 pages
File Size : 53,6 Mb
Release : 2013-03-09
Category : Science
ISBN : 9783662037362
Humic substances occur in all kinds of aquatic systems, but are particularly important in northern, coniferous areas. They strongly modify the aquatic ecosystems and also constitute a major problem in the drinking water supply. This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effects on light and nutrient regimes and biogeochemical cycling, to their role regarding organisms, productivity and food web organization from bacteria to fish. Special emphasis is paid to carbon cycling and food web organization in humic lakes, but aspects of marine carbon cycling related to humus are treated as well.
Author : I. H. Suffet,Patrick MacCarthy
Publisher : Unknown
Page : 908 pages
File Size : 45,9 Mb
Release : 1989
Category : Language Arts & Disciplines
ISBN : UOM:39015016107099
Here is a cohesive compilation of recent research results into the many aspects of water purification. Major sections cover the characterization and environmental impact of aquatic humic substances, their reactions in natural water and sediments, and their influences on water treatment. Topics examined include hazardous waste chemicals, water solubility enhancement, sorption, metal speciation, and photochemistry. Specific types of treatment processes are also described.
Author : E.M. Thurman
Publisher : Springer Science & Business Media
Page : 524 pages
File Size : 50,5 Mb
Release : 1985-04-30
Category : Science
ISBN : 9024731437
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.
Author : International Humic Substances Society. Meeting
Publisher : Unknown
Page : 792 pages
File Size : 55,9 Mb
Release : 1989
Category : Science
ISBN : UCSD:31822005123468
Based on the Second International Conference of the International Humic Substances Society held in Birmingham, England, in 1984, this compendium reviews ways of studying the structure and function of humic substances, including the use of both degradative and nondegradative processes. Also considers nitrogen in humic substances, humic molecules and the interactions between humic and other substances.
Author : Dag Hessen,Lars J. Tranvik
Publisher : Springer
Page : 0 pages
File Size : 51,6 Mb
Release : 1998-07-16
Category : Science
ISBN : 3540639101
Humic substances occur in all kinds of aquatic systems, but are particularly important in northern, coniferous areas. They strongly modify the aquatic ecosystems and also constitute a major problem in the drinking water supply. This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effects on light and nutrient regimes and biogeochemical cycling, to their role regarding organisms, productivity and food web organization from bacteria to fish. Special emphasis is paid to carbon cycling and food web organization in humic lakes, but aspects of marine carbon cycling related to humus are treated as well.
Author : F. H. Frimmel
Publisher : Unknown
Page : 296 pages
File Size : 45,7 Mb
Release : 1988-04-25
Category : Science
ISBN : UOM:39015013231975
Very Good,No Highlights or Markup,all pages are intact.
Author : Jorma Keskitalo,Pertti Eloranta
Publisher : Unknown
Page : 308 pages
File Size : 50,5 Mb
Release : 1999
Category : Freshwater ecology
ISBN : UCSD:31822028148237
Author : Anonim
Publisher : Unknown
Page : 3 pages
File Size : 51,6 Mb
Release : 1981
Category : Electronic
ISBN : OCLC:219964401
Author : E. M. Perdue
Publisher : Unknown
Page : 368 pages
File Size : 46,5 Mb
Release : 1990-06-14
Category : Science
ISBN : UOM:39015017980197
Organic Acids in Aquatic Ecosystems E. M. Perdue E. T. Gjessing Editors This volume consists of background papers and reports on discussions focused on identifying major processes that cause spatial and temporal variability in properties and concentrations of organic acids in aquatic ecosystems. Scientists in aquatic chemistry, environmental chemistry, soil chemistry, organic geochemistry, water treatment technology, forest ecology, and stream ecology collectively address four major questions: What is the composition of organic acids and how are they characterized? How are acid-base properties of "DOC" measured and modeled and how do they affect aquatic ecosystems? How do organic acids interact with solutes, surfaces, and organisms? What are the temporal and spatial variations of organic acids at the ecosystem level? This volume provides an up-to-date assessment of the state of knowledge of organic acids in aquatic ecosystems and identifies promising areas of new research that deserve the attention of all scientists who study chemical and biological processes in natural waters, where the importance of organic acids in such processes is not yet fully recognized.
Author : Abdelhadi Makan
Publisher : BoD – Books on Demand
Page : 186 pages
File Size : 54,9 Mb
Release : 2021-10-06
Category : Technology & Engineering
ISBN : 9781839627514
Present in soil and water, humic substances are the most widespread organic compounds, naturally occurring from a physical, chemical, and microbiological transformation of biomolecules. They represent about 25% of the total organic carbon on the Earth and comprise up to 75% of the dissolved organic carbon in water, making them important for multiple environmental processes in both soil and aquatic systems. Despite many decades of extensive study, the formation mechanisms of humic substances are still a subject of discussion and controversy. This book examines the dynamics of humic substances, their physicochemical and biological properties, and methods for their extraction and characterization. The book also sheds light on recent advances and applications of humic substances in agriculture, environment, industry, and medicine.
Author : Christian Steinberg
Publisher : Springer Science & Business Media
Page : 441 pages
File Size : 43,7 Mb
Release : 2013-11-11
Category : Science
ISBN : 9783662068151
Humic Substances color all waters more or less brown. Their concentrations exceed all carbon of living organisms by at least one order of magnitude. Opposite to former paradigms, they participate in almost any metabolic pathway. They protect against UV-irradation, enable indirect photolysis and, thus, purify hazardous chemicals, they provide inorganic and organic nutrients, may form cryptic genes with DNA and dampen metabolic fluctuations. More recently they can increase adverse effects of hazardous chemicals and they can directly interfere with organisms. The book tries to relate effects to structural features.
Author : G. Davies,E. Ghabbour
Publisher : Garland Science
Page : 352 pages
File Size : 45,7 Mb
Release : 2003-11-28
Category : Science
ISBN : 9781135434717
Humic substances are ubiquitous in the environment. These remarkable brown biomaterials are found in animals, plants, coals, sediments, soils and water. They are crucial components of the carbon cycle and other life processes. Humic Substances: Nature's Most Versatile Materials contains a compilation of papers presented at the 2002 Humic Substances Seminar and will keep humic substances scientists up to date with the latest research.
Author : Bert Allard,Hans Boren,Anders Grimvall
Publisher : Springer
Page : 519 pages
File Size : 51,9 Mb
Release : 1991-02-26
Category : Science
ISBN : 3540537023
The state of the art on isolation techniques, ion binding theory, biologic activity in the aquatic environment as well as the formation of mutagenic compounds from chlorination is reviewed by worldwide-known experts. Additional papers describe current research on the topics: isolation, fractionation and characterization; biological and chemical transformation and degradation; complex formation and interactions with solids; biologic activity, halogenation of humic substances.
Author : E A Ghabbour,G. Davies
Publisher : Woodhead Publishing
Page : 352 pages
File Size : 50,8 Mb
Release : 2014-01-30
Category : Science
ISBN : 9781782424376
This volume uses a molecular approach to bring the reader up to date with research into the structure and properties of these unusual materials. Agricultural and environmental scientists will find its coverage of HS use for soil remediation and enhancement and in water purification as alternatives to conventional methods invaluable.
