Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

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

Source: Environmental Science and Technology 6 p.

Author(s)Eberhardt, Thomas L

Publication Year: 2006  View PDF »

Category: Not Classified

Abstract: 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.

File size: 924 kb(s)

Date posted: 12/04/2007

This publication is also viewable on Treesearch:  view
RITS Product ID: 1360

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »