The addition of organic carbon and nitrate affects reactive transport of heavy metals in sandy aquifers
Type
ArticleAuthors
Satyawali, YaminiSeuntjens, Piet
Van Roy, Sandra
Joris, Ingeborg
Vangeel, Silvia
Dejonghe, Winnie
Vanbroekhoven, Karolien
KAUST Grant Number
KUK-C1-017-12Date
2011-04Permanent link to this record
http://hdl.handle.net/10754/599872
Metadata
Show full item recordAbstract
Organic carbon introduction in the soil to initiate remedial measures, nitrate infiltration due to agricultural practices or sulphate intrusion owing to industrial usage can influence the redox conditions and pH, thus affecting the mobility of heavy metals in soil and groundwater. This study reports the fate of Zn and Cd in sandy aquifers under a variety of plausible in-situ redox conditions that were induced by introduction of carbon and various electron acceptors in column experiments. Up to 100% Zn and Cd removal (from the liquid phase) was observed in all the four columns, however the mechanisms were different. Metal removal in column K1 (containing sulphate), was attributed to biological sulphate reduction and subsequent metal precipitation (as sulphides). In the presence of both nitrate and sulphate (K2), the former dominated the process, precipitating the heavy metals as hydroxides and/or carbonates. In the presence of sulphate, nitrate and supplemental iron (Fe(OH)3) (K3), metal removal was also due to precipitation as hydroxides and/or carbonates. In abiotic column, K4, (with supplemental iron (Fe(OH)3), but no nitrate), cation exchange with soil led to metal removal. The results obtained were modeled using the reactive transport model PHREEQC-2 to elucidate governing processes and to evaluate scenarios of organic carbon, sulphate and nitrate inputs. © 2010 Elsevier B.V.Citation
Satyawali Y, Seuntjens P, Van Roy S, Joris I, Vangeel S, et al. (2011) The addition of organic carbon and nitrate affects reactive transport of heavy metals in sandy aquifers. Journal of Contaminant Hydrology 123: 83–93. Available: http://dx.doi.org/10.1016/j.jconhyd.2010.12.009.Sponsors
This work was supported by the European Union FP6 Integrated Project AquaTerra (Project no. GOCE 505428) under the thematic priority, sustainable development, global change and ecosystems. This publication is also based on the work supported by Award No. KUK-C1-017-12, made by King Abdullah University of Science and Technology (KAUST) (http://www.sowacor.nl/).Publisher
Elsevier BVJournal
Journal of Contaminant HydrologyPubMed ID
21237527ae974a485f413a2113503eed53cd6c53
10.1016/j.jconhyd.2010.12.009
Scopus Count
Collections
Publications Acknowledging KAUST SupportRelated articles
- Microbial processes as key drivers for metal (im)mobilization along a redox gradient in the saturated zone.
- Authors: Vanbroekhoven K, Van Roy S, Gielen C, Maesen M, Ryngaert A, Diels L, Seuntjens P
- Issue date: 2007 Aug
- Transport and attenuation of metal(loid)s in mine tailings amended with organic carbon: Column experiments.
- Authors: Lindsay MB, Blowes DW, Ptacek CJ, Condon PD
- Issue date: 2011 Jul 1
- Effects of a reactive barrier and aquifer geology on metal distribution and mobility in a mine drainage impacted aquifer.
- Authors: Doerr NA, Ptacek CJ, Blowes DW
- Issue date: 2005 Jun
- Metals removal from soil, fly ash and sewage sludge leachates by precipitation and dewatering properties of the generated sludge.
- Authors: Djedidi Z, Bouda M, Souissi MA, Ben Cheikh R, Mercier G, Tyagi RD, Blais JF
- Issue date: 2009 Dec 30
- Is trace metal release in wetland soils controlled by organic matter mobility or Fe-oxyhydroxides reduction?
- Authors: Grybos M, Davranche M, Gruau G, Petitjean P
- Issue date: 2007 Oct 15