Strontium adsorption and desorption in wetlands: Role of organic matter functional groups and environmental implications.
作者： Antoine Boyer , Paris Ning , Doug Killey , Martin Klukas , David Rowan
DOI: 10.1016/J.WATRES.2018.01.026
关键词:
摘要: Strontium (Sr) is a chemical element that often used as tracer in hydrogeochemical studies, and ubiquitously distributed radioactive contaminant nuclear sites the form of strontium-90 (Sr-90). At interface between groundwater surface water, wetlands possess unique properties whose impact on Sr transport has not been investigated thoroughly. In this study, adsorption desorption was six natural wetland substrates two mixes exogenous media sediment: winter summer sediments, decayed cattails, wood, leaf litter, moss, bone charcoal, clinoptilolite. The composition organic matter characterized using carbon-13, solid phase Nuclear Magnetic Resonance analysis. range substrates' coefficients obtained could be explained by factors indicative proteins matter, which were shown to support strong poorly reversible adsorption. contrast, proportion carbohydrates lignin found lower higher desorption. implications these results for pollution remediation are discussed.
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