Abstract
The effect of acid-volatile sulfide (AVS) oxidation on Fe-S cycling and water quality in coastal flood plain drains from acid-sulfate soil landscapes was examined using natural sediments and synthetic iron monosulfide. Oxidation of AVS occurred rapidly (half-time ≤ 1 h) and produced elemental sulfur (S80(s)) and iron oxyhydroxide (FeOOH (s)). The initial rapid AVS oxidation process occurred without significant acidification or changes to the aqueous-phase composition. Severe acidification (pH < 4) occurred only once S80 (s) began to oxidize to SO4 (within 2-3 days of the initial AVS oxidation). Our results demonstrate, for the first time with natural sediments, a significant pH-buffered (near-neutral) AVS oxidation step with the trigger to acidification being the oxidation of S80 (s). Acidification resulted in the pH-dependent release of large amounts of Al, Mn, Ni, and Zn even though the sediment metal content was low.
| Original language | English |
|---|---|
| Pages (from-to) | 1217-1222 |
| Number of pages | 6 |
| Journal | Environmental Science and Technology |
| Volume | 40 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2006 |
| Externally published | Yes |
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Acid-volatile sulfide oxidation in coastal flood plain drains : Iron-sulfur cycling and effects on water quality. / Burton, Edward D.; Bush, Richard T.; Sullivan, Leigh A.
In: Environmental Science and Technology, Vol. 40, No. 4, 2006, p. 1217-1222.Research output: Contribution to journal › Article
TY - JOUR
T1 - Acid-volatile sulfide oxidation in coastal flood plain drains
T2 - Iron-sulfur cycling and effects on water quality
AU - Burton, Edward D.
AU - Bush, Richard T.
AU - Sullivan, Leigh A.
PY - 2006
Y1 - 2006
N2 - The effect of acid-volatile sulfide (AVS) oxidation on Fe-S cycling and water quality in coastal flood plain drains from acid-sulfate soil landscapes was examined using natural sediments and synthetic iron monosulfide. Oxidation of AVS occurred rapidly (half-time ≤ 1 h) and produced elemental sulfur (S80(s)) and iron oxyhydroxide (FeOOH (s)). The initial rapid AVS oxidation process occurred without significant acidification or changes to the aqueous-phase composition. Severe acidification (pH < 4) occurred only once S80 (s) began to oxidize to SO4 (within 2-3 days of the initial AVS oxidation). Our results demonstrate, for the first time with natural sediments, a significant pH-buffered (near-neutral) AVS oxidation step with the trigger to acidification being the oxidation of S80 (s). Acidification resulted in the pH-dependent release of large amounts of Al, Mn, Ni, and Zn even though the sediment metal content was low.
AB - The effect of acid-volatile sulfide (AVS) oxidation on Fe-S cycling and water quality in coastal flood plain drains from acid-sulfate soil landscapes was examined using natural sediments and synthetic iron monosulfide. Oxidation of AVS occurred rapidly (half-time ≤ 1 h) and produced elemental sulfur (S80(s)) and iron oxyhydroxide (FeOOH (s)). The initial rapid AVS oxidation process occurred without significant acidification or changes to the aqueous-phase composition. Severe acidification (pH < 4) occurred only once S80 (s) began to oxidize to SO4 (within 2-3 days of the initial AVS oxidation). Our results demonstrate, for the first time with natural sediments, a significant pH-buffered (near-neutral) AVS oxidation step with the trigger to acidification being the oxidation of S80 (s). Acidification resulted in the pH-dependent release of large amounts of Al, Mn, Ni, and Zn even though the sediment metal content was low.
UR - http://www.scopus.com/inward/record.url?scp=33144486693&partnerID=8YFLogxK
U2 - 10.1021/es0520058
DO - 10.1021/es0520058
M3 - Article
VL - 40
SP - 1217
EP - 1222
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 4
ER -