EPA Science Inventory

REMOVAL OF SELECTED POLLUTANTS FROM AQUEOUS MEDIA BY HARDWOOD MULCH

Citation:

RAY, A., A. SELVAKUMAR, AND A. N. TAFURI. REMOVAL OF SELECTED POLLUTANTS FROM AQUEOUS MEDIA BY HARDWOOD MULCH. JOURNAL OF HAZARDOUS MATERIALS. Elsevier Science Ltd, New York, NY, 136(2):213-218, (2006).

Description:

Generic hardwood mulch, usually used for landscaping, was utilized to remove several selected pollutants (heavy metals and toxic organic compounds) typically found in urban stormwater (SW) runoff. The hardwood mulch sorbed all the selected pollutants from a spiked stormwater mixture, including copper (Cu2+), cadmium (Cd2+), chromium (Cr6+), lead (Pb2+), zinc (Zn2+), 1,3 dichlorobenzene (DCB), naphthalene (NP), fluoranthene (FA), butylbenzylphthalate (BBP), and benzo(a)pyrene (B[a]P). Masses of the pollutants sorbed depended upon the pollutant species, contact time, and initial concentration which varied from 20 to 100%. Sorption rates of the metals, in general, were more rapid than those of the organics; however, mass removals (percent) of the organics, in contrast to those of the metals, were independent of their initial concentrations. With the exception of Cd, percentages (weight) of the metals removed declined as their initial concentrations decreased. None of the sorbed pollutants desorbed to any significant extent upon extended washing with water. It is quite feasible that in the presence of mulch the uptake of these pollutants by the aquatic species will be reduced significantly.

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 08/21/2006
Completion Date: 08/21/2006
Record Last Revised: 08/15/2007
Record Created: 12/08/2004
Record Released: 12/08/2004
OMB Category: Other
Record ID: 106798

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

WATER SUPPLY AND WATER RESOURCES DIVISION

URBAN WATERSHED MANAGEMENT BRANCH