Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (924 KB bytes)

Title: Polymer-treated woody biomass: a filtration medium for removing phosphate from water

Author: Eberhardt, Thomas L;

Date: 2006

Source: Environmental Science and Technology 6 p.

Publication Series: Miscellaneous Publication

Description: A two-stage treatment of refined aspen wood fiber with solutions of carboxymethyl cellulose (CMC) and ferrous chloride afforded a filtration medium that was effective in removing phosphate from test solutions. To assess the stability of the filtration medium, samples exposed to the test solutions were analyzed by FTIR spectroscopy. The resultant spectra indicated that a significant amount of the carboxylate functionality, imparted by the CMC, remained with the fiber. Determinations of iron and phosphorous levels in these samples by elemental analysis confirmed that the CMC provided additional sites to complex iron ions, and that phosphate removed from the test solutions was retained within the filtration medium. To better understand the distribution of the CMC in the fiber matrix, treatments were also carried out with CMC containing a polymeric fluorescent dye. Observations by confocal laser scanning microscopy showed partial filling of the fiber lumens. To address concerns related to the hydraulic conductivity of the fibers, aspen wood particles of different sizes were also treated. Results showed that the phosphorous uptake capacity decreased with decreasing particle size. Measurement of iron released into the test solutions suggested that the smaller wood particles may be preferred since they showed the lowest release of iron relative to the amount of phosphate removed.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Eberhardt, Thomas L 2006. Polymer-treated woody biomass: a filtration medium for removing phosphate from water. Environmental Science and Technology 6 p.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.