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Published online 26 April 2006
Published in J Environ Qual 35:871-879 (2006)
DOI: 10.2134/jeq2005.0187
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Neutralization Potential Determination of Siderite (FeCO3) Using Selected Oxidants

E. B. Haneya, R. L. Haneyb, L. R. Hossnerc and G. N. Whitec,*

a Railroad Commission of Texas, Surface Mining and Reclamation Division, P.O. Box 12967 Austin, TX 78711-2967
b USDA-ARS, 808 East Blackland Road, Temple, TX 76502
c Department of Soil and Crop Sciences, MS 2474, Texas A&M University, College Station, TX 77843-2474


Figure 1
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  		Fig. 1. X-ray diffractograms showing major peaks for Samples A and B as compared with reagent-grade rhodochrosite (MnCO3) and siderite (FeCO3). S = siderite, M = manganoan siderite, R = rhodochrosite, and Q = quartz.

 

Figure 2
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  		Fig. 2. Neutralization potential values for 0.1 g of reagent-grade CaCO3, MnCO3, and FeCO3. Error bars indicate 1 SD.

 

Figure 3
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  		Fig. 3. Experimental neutralization potential (NP) values of siderite samples determined using USEPA Method 600/2-78-054 3.2.3 (Sobek et al., 1978) and oxidation treatments as compared with carbonate and cation concentrations.

 

Figure 4
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  		Fig. 4. Comparison of neutralization potential (NP) values obtained using USEPA Method 600/2-78-054 3.2.3 (Sobek et al., 1978) as compared with oxidation treatments. Error bars indicate 1 SD.

 

Figure 5
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  		Fig. 5. Neutralization potential (NP) values of siderite samples determined using 5 or 10 mL of H2O2 on filtered and nonfiltered samples after digestion with 0.1 M HCl. Error bars indicate 1 SD.

 

Figure 6
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  		Fig. 6. Experimental neutralization potential (NP) values of H2O2 treatments as compared to theoretical values obtained using stoichiometric relationships describing the dissolution of Fe, Ca, Mg, and Mn carbonates under acidic testing conditions.

 

Figure 7
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  		Fig. 7. X-ray diffraction patterns for the dissolution products formed from siderite using O2, KMnO4, and H2O2. The sharp peaks on the O2 pattern correspond to residual siderite.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
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