EPA Science Inventory

EFFECTS OF HUMIC SUBSTANCES ON ATTENUATION OF METALS: BIOAVAILABILITY AND MOBILITY IN SOIL

Citation:

Impellitteri**, C A. AND H. E. Allen. EFFECTS OF HUMIC SUBSTANCES ON ATTENUATION OF METALS: BIOAVAILABILITY AND MOBILITY IN SOIL. Chapter 6, R. Hamon, M. McLaughlin, E. Lombi, J. W. Gorsuch (ed.), Natural Attentuation of Trace Element Availability in Soils. CRC Press - Taylor & Francis Group, LLC, Boca Raton, FL, , 89-112, (2007).

Description:

Humic substances play vastly important roles in metal behavior in a wide variety of environments. They can affect the mobility and bioavailability of metals by binding and sequestration thereby decreasing the mobility of a metal. They can also transport metals into solution or bind them in solution preventing the sorption of metal onto the solid phase. The inclusion of humic substances in assessing the risk from contaminant metals in the environment is rarely done though critical. Ignoring the presence of humic substances will hopefully become less problematic in the future as we gain more knowledge concerning the structure of these molecules and more exactly define their roles on contaminants in the environment.
This chapter reviews methods of microscopic and macroscopic characterization of humic substances. It addresses the importance of operational definitions of humic substances and how these definitions vary between researchers. The chapter then focuses on the relationships between humic substances and metals with emphasis on the mobilization of metals by humic substances. Lastly, a case study illustrates the importance of humic substances in the mobilization of Cu and Pb in a series of Dutch soils.

Purpose/Objective:

This chapter discusses the different components that constitute soil organic matter and focuses on the influence of organic matter on the natural attenuation of metal contaminants in soils.

URLs/Downloads:

CRC PRESS URL FOR BOOK   Exit

Soil Science Society of America Journal – URL for Book   Exit

Record Details:

Record Type: DOCUMENT (BOOK CHAPTER)
Start Date: 11/16/2006
Completion Date: 11/16/2006
Record Last Revised: 04/29/2009
Record Created: 12/08/2004
Record Released: 12/08/2004
OMB Category: Other
Record ID: 104016

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

LAND REMEDIATION AND POLLUTION CONTROL DIVISION

REMEDIATION AND REDEVELOPMENT BRANCH