Interactions of Paraquat with Humic Acid PDF Download

Author: Luis Eduardo Sojo Lopez
Publisher:
ISBN:
Category : Cations
Languages : en
Pages : 0

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Author: G.H. Bolt
Publisher: Springer Science & Business Media
ISBN: 9401719098
Category : Nature
Languages : en
Pages : 605

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About 20 years ago the emphasis in soil chemistry research switched from studies of problems related to scarcities of plant nutrients to those arising from soil pollutants. The new problems have come about because of the excessive uses of fertilizers, the inputs from farm and industrial wastes, the widespread applications of anthropogenie xenobiotic chemicals, and the deterioration of soil structure resulting from certain modern agriculture practises. The International Society of Soil Science (ISSS) recognized these problems and challenges. A provisional Working Group was set up in 1978 to focus attention on soil colloids with a view to understanding better the interactions wh ich take place at their surfaces. It was recognized that these interactions are fundamental to problems of soil fertility, as weIl as to those of soil pollution. After the group had received the official support of ISSS at its 12th International Congress in New Delhi in 1982 it set as its priority the assembling and evaluation of information, relevant to the soil and environmental sciences, concerning the composition and structure of soil colloids. Prior to that aseries of Position Papers were published in the Bulletin of the International Society of Soil Science (Vol. 61, 1981) outlining the state of knowledge about the composition and properties of soil colloids.

Author: Bruno Yaron
Publisher: Springer Science & Business Media
ISBN: 364224386X
Category : Science
Languages : en
Pages : 378

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Book Description
This book combines soil science, earth science, and environmental geochemistry, providing comprehensive background information for specialists interested in chemical-induced changes in the soil-subsurface system. Readers are introduced to the chemistry of contaminants that often disturb the natural soil-subsurface equilibrium as a result of human activity. While the soil-subsurface system has in many cases been affected by human impact, the effects of chemical contaminants on the actual matrix and properties have been largely neglected. The major focus of the book is on changes to the soil-subsurface matrix and properties caused by chemical pollution. By integrating results available in the literature, we observe that chemical pollutants may lead to the irreversible formation of a new soil-subsurface regime characterized by a matrix and properties different than those of the natural regime. In contrast to the geological time scales dictating natural changes to the matrix and properties of the soil-subsurface system, the time scale associated with chemical pollutant-induced changes is far shorter and extends over a “human lifetime scale.” The numerous examples presented in the book confirm that chemical contamination should be considered as an additional factor in the formation of a contemporary soil-subsurface regime that is different than that of the pristine system.

Author: Irina V. Perminova
Publisher: Springer Science & Business Media
ISBN: 9781402032509
Category : Science
Languages : en
Pages : 544

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Effective remediation of polluted environments is a priority in both Eastern and Western countries. In the U.S. and Europe, remediation costs generally exceed the net economic value of the land. As a result, scientists and engineers on both sides of the Atlantic have aggressively tried to develop novel technologies to meet regulatory standards at a fraction of the costs. In situ remediation shows considerable promise from both technical and economic perspectives. In situ technologies that deploy natural attenuating agents such as humic substances (HS) may be even more cost effective. Numerous studies have shown humics capable of altering both the chemical and the physical speciation of the ecotoxicants and in turn attenuate potential adverse environmental repercussions. Furthermore, the reserves of inexpensive humic materials are immense. Which suggests HS portend great promise as inexpensive amendments to mitigate the environmental impacts of ecotoxicants and as active agents in remediation. To elucidate emerging concepts of humics-based remediation technologies, we organized the NATO Advanced Research Workshop (ARW), entitled "Use of humates to remediate polluted environments: from theory to practice", held on September 23-29, 2002 in Zvenigorod, Russia (see the web-site http://www.mgumus.chem.msu.ru/arw).

Author: P. M. Huang
Publisher: CRC Press
ISBN: 9780873719148
Category : Technology & Engineering
Languages : en
Pages : 472

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This book addresses the interactions of soil minerals with organics and microbes and their impacts on the dynamics, transformations, and toxicity of metals, metalloids, other inorganics, and xenobiotics that affect land quality and ecosystem health. It is the result of the work group on "interactions of soil minerals with organic components and microorganisms" in the International Society of Soil Science.

Author: Pan Ming Huang
Publisher: John Wiley & Sons
ISBN: 9780471607908
Category : Science
Languages : en
Pages : 592

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Book Description
Wechselwirkungen von Mineralien, organischen Verbindungen und Mikroorganismen im Boden: Dieses Handbuch wertet aktuelle Forschungsergebnisse auf diesem Gebiet kritisch aus und erläutert die Bedeutung der Zusammenhänge für Ökosysteme. Ein besonderer Schwerpunkt bildet die Wechselbeziehung zwischen Schadstoffen im Boden und Populationen von Mikroorganismen.

Author: Brad Luther Upham
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 212

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Author: Donald L. Wise
Publisher: CRC Press
ISBN: 9780824703332
Category : Technology & Engineering
Languages : en
Pages : 930

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This volume focuses on innovative bioremediation techniques and applications for the cleanup of contaminated media and sites. It includes quantitative and design methods that elucidate the relationships among various operational parameters, and waste chemistry that defines the cost effectiveness of bioremediation projects. It also presents numerical models.

Author:
Publisher:
ISBN:
Category : Environmental chemistry
Languages : en
Pages : 288

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An international journal for scientific research into the environment and its relationship with man.

Author: Domenico Petruzzelli
Publisher: Springer Science & Business Media
ISBN: 3642778623
Category : Science
Languages : en
Pages : 520

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Book Description
Experts in soil and environmental sciences as well as in the theory of wave propagation and numerical modeling methods provide a comprehensive account of different aspects of pollutant migration in soils, aquifers, and other geological formations. Emphasis is laid on the analysis of contributing phenomena and their interactions, modeling, and the practical use of such knowledge and models for guidance in disposal operations, preventive measures to minimize ecological damage, prediction of consequences of seepage, and design of remedial actions. Topics covered include the chemical behavior of soils, sorption and retardation, biochemistry of pollutants, ion exchange and kinetics of reactions in soils, measurement of adsorption and desorption, multiphase hydrodynamics, multicomponent wave theory and the coherence concept, nonlinear wave propagation in geological formations, multiphase convective transport, diffusion and fast reaction, modeling pollutant transport, numerical methods, dispersion of contaminants from landfills, risk analysis, water reuse, and radioactive soil contamination at Chernobyl.