Zerovalent iron particles effectively remediate halogenated hydrocarbon contaminants, such as trichloroethylene (TCE). Sand packed columns were used to study the factors involved for various particle modifications. Unmodified particles were filtered efficiently by the columns, but incorporating poly(acrylic acid) (PAA) as a transport agent allowed over 97 mass % iron particle elution through 54 cm columns. Sticking coefficients were as low as 0.01. In agreement with simulations based on the Tufenkji-Elimelech equation, iron-PAA particles within the correct size range pass through the column, while particles outside this range (300 nm to 3 im) are largely retained. This is an abstract of a paper presented at the 230th ACS National Meeting (Washington, DC 8/28/2005-9/1/2005).
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)