Tags

Type your tag names separated by a space and hit enter

Fate of biosolids trace metals in a dryland wheat agroecosystem.
J Environ Qual 2008 Nov-Dec; 37(6):2135-44JE

Abstract

Biosolids land application for beneficial reuse applies varying amounts of trace metals to soils. Measuring plant-available or total soil metals is typically performed to ensure environmental protection, but these techniques do not quantify which soil phases play important roles in terms of metal release or attenuation. This study assessed the distribution of Cd, Cr, Cu, Mo, Ni, Pb, and Zn associated with soluble/exchangeable, specifically adsorbed/carbonate-bound, amorphous Mn hydroxyoxide-bound, amorphous Fe hydroxyoxide-bound, organically complexed, and residual inorganic phases. Biosolids were applied every 2 yr from 1982 to 2002 (except in 1998) at rates of 0, 6.7, 13.4, 26.8, and 40.3 dry Mg biosolids ha(-)(1) to 3.6- by 17.1-m plots. In 2003, 0- to 20-cm and 20- to 60-cm soil depths were collected and subjected to 4 mol L(-1) HNO(3) digestion and sequential extraction. Trace metals were concentrated in the 0- to 20-cm depth, with no significant observable downward movement using 4 mol L(-1) HNO(3) or sequential extraction. The sequential extraction showed nearly all measurable Cd present in relatively mobile forms and Cr, Cu, Mo, Ni, Pb, and Zn present in more resistant phases. Biosolids application did not affect Cd or Cr fractionation but did increase relatively immobile Cu, Mo, and Zn phases and relatively mobile Cu, Ni, and Pb pools. The mobile phases have not contributed to significant downward metal movement. Long-term, repeated biosolids applications at rates considered several times greater than agronomic levels should not significantly contribute to downward metal transport and ground water contamination for soils under similar climatic conditions, agronomic practices, and histories.

Authors+Show Affiliations

USDA-ARS NWISRL, Kimberly, ID, 83341, USA. jim.ippolito@ars.usda.govNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18948467

Citation

Ippolito, J A., and K A. Barbarick. "Fate of Biosolids Trace Metals in a Dryland Wheat Agroecosystem." Journal of Environmental Quality, vol. 37, no. 6, 2008, pp. 2135-44.
Ippolito JA, Barbarick KA. Fate of biosolids trace metals in a dryland wheat agroecosystem. J Environ Qual. 2008;37(6):2135-44.
Ippolito, J. A., & Barbarick, K. A. (2008). Fate of biosolids trace metals in a dryland wheat agroecosystem. Journal of Environmental Quality, 37(6), pp. 2135-44. doi:10.2134/jeq2008.0064.
Ippolito JA, Barbarick KA. Fate of Biosolids Trace Metals in a Dryland Wheat Agroecosystem. J Environ Qual. 2008;37(6):2135-44. PubMed PMID: 18948467.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fate of biosolids trace metals in a dryland wheat agroecosystem. AU - Ippolito,J A, AU - Barbarick,K A, Y1 - 2008/10/23/ PY - 2008/10/25/pubmed PY - 2009/1/23/medline PY - 2008/10/25/entrez SP - 2135 EP - 44 JF - Journal of environmental quality JO - J. Environ. Qual. VL - 37 IS - 6 N2 - Biosolids land application for beneficial reuse applies varying amounts of trace metals to soils. Measuring plant-available or total soil metals is typically performed to ensure environmental protection, but these techniques do not quantify which soil phases play important roles in terms of metal release or attenuation. This study assessed the distribution of Cd, Cr, Cu, Mo, Ni, Pb, and Zn associated with soluble/exchangeable, specifically adsorbed/carbonate-bound, amorphous Mn hydroxyoxide-bound, amorphous Fe hydroxyoxide-bound, organically complexed, and residual inorganic phases. Biosolids were applied every 2 yr from 1982 to 2002 (except in 1998) at rates of 0, 6.7, 13.4, 26.8, and 40.3 dry Mg biosolids ha(-)(1) to 3.6- by 17.1-m plots. In 2003, 0- to 20-cm and 20- to 60-cm soil depths were collected and subjected to 4 mol L(-1) HNO(3) digestion and sequential extraction. Trace metals were concentrated in the 0- to 20-cm depth, with no significant observable downward movement using 4 mol L(-1) HNO(3) or sequential extraction. The sequential extraction showed nearly all measurable Cd present in relatively mobile forms and Cr, Cu, Mo, Ni, Pb, and Zn present in more resistant phases. Biosolids application did not affect Cd or Cr fractionation but did increase relatively immobile Cu, Mo, and Zn phases and relatively mobile Cu, Ni, and Pb pools. The mobile phases have not contributed to significant downward metal movement. Long-term, repeated biosolids applications at rates considered several times greater than agronomic levels should not significantly contribute to downward metal transport and ground water contamination for soils under similar climatic conditions, agronomic practices, and histories. SN - 0047-2425 UR - https://www.unboundmedicine.com/medline/citation/18948467/Fate_of_biosolids_trace_metals_in_a_dryland_wheat_agroecosystem_ L2 - http://dl.sciencesocieties.org/publications/jeq/articles/37/6/2135 DB - PRIME DP - Unbound Medicine ER -