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Sorption of Arsenic from Soil-Washing Leachate by Surfactant-Modified Zeolite

Enid J. Sullivan*,a, Robert S. Bowmanb and Irene A. Legiecc

a Los Alamos National Laboratory, RRES Division, MS J599, Los Alamos, NM 87545
b New Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorro, NM 87801
c E.I. DuPont de Nemours & Co., Inc., Jackson Lab, Chambers Works, Deepwater, NJ 08023



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  		Fig. 1. Comparison of total versus dissolved arsenic in solution for 25 and 15°C samples. A 1:1 line is shown for reference.

 


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  		Fig. 2. Arsenic sorption from leachate by surfactant-modified zeolite (SMZ) at 25 and 15°C. Lines are best-fits of the Langmuir isotherm Eq. [1] to the observed data.

 


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  		Fig. 3. Sorbed arsenic from direct solids analysis versus arsenic concentrations calculated from the difference between initial and final solution concentrations.

 


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  		Fig. 4. Sorption of dissolved organic carbon by surfactant-modified zeolite (SMZ). The regression line has been forced through zero.

 




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