Introduction to Phytoremediation. EPA/600/R-99/107 February 2000 http://clu-in.org/download/remed/introphyto.pdf. Phytoremediation Overview. Phytohydraulics. Phytodegradation. Phytoextraction. Phytostabilization. Phytovolatalization. Rhizodegradation. Rhizofiltration.
Engineered plant thrive on arsenic
Phytoremediation of Selenium by two helophyte species in subsurface flow constructed wetland.
Shardendu, N. Salhani, S.F. Boulyga, E. Stengel
Chemosphere 50 (2003) 967-973
Constructed wetlands is one method used to help purify wastewaters.ConstructedWetlands
Fig. 1. Outline of the experimental device for tap layer
supplying with sodium selenate (Na2SeO4) in one vegetated bed with sampling points (AMOVA facility).
Plasma, Argon gas, is used to atomize and ionize the elements in a sample. The resulting ions are then passed through a series of apertures (cones) into the high vacuum analyzer. The isotopes of the elements are identified by their mass-to-charge ratio (m/e) and the intensity of a specific peak in the mass spectrum is proportional to the amount of that isotope (element) in the original sample.
Fig. 2. Profile of selenium
migration on first day
(May 31, 1999) from inlet to
other points and outlet in
Phragmites, Typha (a) and
gravel bed (b). Sampling points
1, 2, 3 and 4, inlet (I) and
Fig. 3. Inlet and outlet selenium concentration with time duration in Typha and Phragmites beds during full experiment period.
Fig. 4. Selenium concentration profiles(n=12) with RSD along the bed length in Typha, Phragmites and control bed. (*) Under detection limit (0.05 g Se/l).
Fig. 5. Course of mean (n=7) oxygen
concentration, water temperature and pH values (a, b, c) with RSD values and corresponding Se concentration at different sampling
points along the beds of Typha, Phragmites and gravel control.
Fig. 6. Bioaccumulation of Se in belowground (organic material,
roots, rhizomes) and aboveground (stems, leaves) parts of the
plant species at segment S1 and S4: (a) Se content in Typha
control; (b) Se content in Phragmites control; (c) Se content in
Typha after 65 d and (d) Se content in Phragmites after 65 d. (*)
Under detection limit (0.4 g Se/g dry matter).
University of Missouri Research Reactor. 2002
The Brownfields Site definition is found in Public Law 107-118 (H.R. 2869) - "Small Business Liability Relief and Brownfields Revitalization Act" signed into law January 11, 2002.
“If contaminated…sites are viewed as only pollution problems, disconnected from community revitalization goals and economic development strategies, then efforts to reuse these sites will flounder.”