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Advisor(s)
Abstract(s)
Contamination of ground water as a consequence of soil leaching processes is an issue of major concern. In this context, a simulation of the soil leaching process was designed. A sequential injection (SI) method to monitor the soil leaching of iron complexes with in-line rain simulation for leachate production is described. The developed methodology comprises the SI determination of both iron(III) and 3-hydroxy-4-pyridinones iron(III) complexes, coupled to a mini soil column (mSC) for displaying in-line rain simulations.
The described SI method enabled iron(III) determination within the range 2.0–35 μmol L−1, with a detection limit of 0.42 μmol L−1, and determination of iron(III) complexes in the range 1.0–45 μmol L−1. It was successfully applied to leachates from laboratory scale soil columns (LSSC), with good precision for both iron(III) and iron complexes determinations: calculated relative standard deviation (RSD) of 5% and 6%, respectively. A step further in automation and miniaturization was attained with the incorporation of a mini soil column for the in-line leachate production. The system enabled the soil leachate production and assessment in less than 5 min, including determinations in triplicate.
Description
Keywords
Mini soil column Sequential injection Iron and iron complexes Soil leachate Inline rain simulation
Pedagogical Context
Citation
Mesquita, L.S., Mesquita, R.B.R., Leite, A., Moniz, T., Rangel, M. & Rangel, A.O.S.S. (2020) Integrated Flow-based System Displaying an In-line Mini Soil Column to Monitor Iron Species in Soils Leachates. Communications in Soil Science and Plant Analysis. https://doi.org/10.1080/00103624.2020.1751186
Publisher
Taylor & Francis Group