Tags

Type your tag names separated by a space and hit enter

Mobilization of trace metals and inorganic compounds during resuspension of anoxic sediments from Trepangier Bayou, Louisiana.
J Environ Qual. 2011 Mar-Apr; 40(2):484-91.JE

Abstract

The release of trace metals (Mn, Ni, Co, Cu, Zn, Pb, and Cd) and inorganic compounds (As) from initially anoxic Trepangier Bayou sediments, Louisiana and the sources of the released metals were investigated. After 1 to 2 d aeration, significant amounts of trace metals (Mn, Zn, Cd, Ni, and Co) were released to the aqueous phase with increased acidity, primarily due to the oxidation of acid-volatile sulfide and ferrous iron and iron sulfide minerals. The addition of a bacterial inhibitor, NaN,, to the Trepangier sediment during resuspension inhibited metal release, suggesting that microbial catalysis can regulate metal mobilization during sediment resuspension. In a well buffered system, oxidation of iron sulfides alone did not appear to induce trace metal release. Moreover, when Trepangier sediment was resuspended in anoxic conditions at neutral pH, <1% of the trace metal content was released, whereas a significant release of metal was observed under acidic anoxic conditions. Although oxidation of iron sulfide minerals is an essential prerequisite for the release of Zn, Co, Cd, and Ni, carbonates and oxides also play a role. The trace metals and inorganic compounds investigated could be classified into three groups according to their release characteristics: (i) Mn, Zn, Cd, Ni, and Co; (ii) Fe, Pb, and As; and (iii) Cu. The groupings appeared to depend on the sources of compounds and their relative affinity, after oxidation, to iron oxyhydroxides or organic matter.

Authors+Show Affiliations

Dep. of Civil and Environmental Engineering, Univ. of Texas at San Antonio, One UTSA Cir., San Antonio, TX 78249, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21520756

Citation

Shipley, Heather J., et al. "Mobilization of Trace Metals and Inorganic Compounds During Resuspension of Anoxic Sediments From Trepangier Bayou, Louisiana." Journal of Environmental Quality, vol. 40, no. 2, 2011, pp. 484-91.
Shipley HJ, Gao Y, Kan AT, et al. Mobilization of trace metals and inorganic compounds during resuspension of anoxic sediments from Trepangier Bayou, Louisiana. J Environ Qual. 2011;40(2):484-91.
Shipley, H. J., Gao, Y., Kan, A. T., & Tomson, M. B. (2011). Mobilization of trace metals and inorganic compounds during resuspension of anoxic sediments from Trepangier Bayou, Louisiana. Journal of Environmental Quality, 40(2), 484-91.
Shipley HJ, et al. Mobilization of Trace Metals and Inorganic Compounds During Resuspension of Anoxic Sediments From Trepangier Bayou, Louisiana. J Environ Qual. 2011 Mar-Apr;40(2):484-91. PubMed PMID: 21520756.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mobilization of trace metals and inorganic compounds during resuspension of anoxic sediments from Trepangier Bayou, Louisiana. AU - Shipley,Heather J, AU - Gao,Yan, AU - Kan,Amy T, AU - Tomson,Mason B, PY - 2011/4/28/entrez PY - 2011/4/28/pubmed PY - 2011/5/25/medline SP - 484 EP - 91 JF - Journal of environmental quality JO - J Environ Qual VL - 40 IS - 2 N2 - The release of trace metals (Mn, Ni, Co, Cu, Zn, Pb, and Cd) and inorganic compounds (As) from initially anoxic Trepangier Bayou sediments, Louisiana and the sources of the released metals were investigated. After 1 to 2 d aeration, significant amounts of trace metals (Mn, Zn, Cd, Ni, and Co) were released to the aqueous phase with increased acidity, primarily due to the oxidation of acid-volatile sulfide and ferrous iron and iron sulfide minerals. The addition of a bacterial inhibitor, NaN,, to the Trepangier sediment during resuspension inhibited metal release, suggesting that microbial catalysis can regulate metal mobilization during sediment resuspension. In a well buffered system, oxidation of iron sulfides alone did not appear to induce trace metal release. Moreover, when Trepangier sediment was resuspended in anoxic conditions at neutral pH, <1% of the trace metal content was released, whereas a significant release of metal was observed under acidic anoxic conditions. Although oxidation of iron sulfide minerals is an essential prerequisite for the release of Zn, Co, Cd, and Ni, carbonates and oxides also play a role. The trace metals and inorganic compounds investigated could be classified into three groups according to their release characteristics: (i) Mn, Zn, Cd, Ni, and Co; (ii) Fe, Pb, and As; and (iii) Cu. The groupings appeared to depend on the sources of compounds and their relative affinity, after oxidation, to iron oxyhydroxides or organic matter. SN - 0047-2425 UR - https://www.unboundmedicine.com/medline/citation/21520756/Mobilization_of_trace_metals_and_inorganic_compounds_during_resuspension_of_anoxic_sediments_from_Trepangier_Bayou_Louisiana_ L2 - https://doi.org/10.2134/jeq2009.0124 DB - PRIME DP - Unbound Medicine ER -