Adsorption of heavy metals on rhizosphere soil
- Kansas State Univ., Manhattan, KS (United States)
Ion exchange, surface adsorption/desorption, complexation by organic materials, and precipitation/dissolution of discreet solid phases are typical mechanisms that control heavy metals in solution. Understanding the mechanism that is responsible for a given metal is critical to prediction of leaching behavior. Plants can affect mobility of heavy metals by releasing organic compounds into the rhizosphere. Some of the organics released by plant roots (and microorganisms) are strong complexing agents for metals and can potentially increase metal mobility. Sorption and desorption reactions (kinetics and isotherms) of a variety of heavy metals will be determined for diffusion controlled and ion exchange reactions. Organic compounds that could impact metal transport, mine tailings, and soil will be equilibrated for approximately 18 hours in batch studies. The solution phase will be separated and concentrations of target metals measured. This research will quantify heavy metal adsorption/desorption characteristics of soil influenced by plant roots.
- OSTI ID:
- 491067
- Report Number(s):
- CONF-9406250-; TRN: IM9729%%318
- Resource Relation:
- Conference: 9. Annual conference on hazardous waste remediation, Bozeman, MT (United States), 8-10 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of the 9. annual conference on hazardous waste remediation; Erickson, L.E.; Tillison, D.L.; Grant, S.C.; McDonald, J.P. [eds.]; PB: 389 p.
- Country of Publication:
- United States
- Language:
- English
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