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Advisor(s)
Abstract(s)
Monitoring the soil/water interface has become fundamental for both environmental and agricultural
studies. This work aimed to set up and monitor laboratory scale soil columns (LSSCs) for assessing
nutrient levels and characterizing soil leachates using flow analysis methods. A flow analysis method was
developed to determine calcium and magnesium concentrations, overcoming the disadvantages of
conventional methods in terms of time consumption, waste production and cost. The LSSCs were set up
with soil cores from distinct locations and with burned soil to verify if soil type or forest fires affect
leaching behaviour. Leachates were obtained through rain simulations with rainwater. In order to
establish valid comparisons, simulated rain was assessed before and after going through the LSSCs. The
accommodation of both metals in the same sequential injection manifold was successfully attained, as
well as the determination of ranges of calcium of 0.160–35.0 mg L-1, and a range of magnesium of
0.160–8.00 mg L-1. The developed method was successfully used to monitor different soil leachates,
allowing for the assessment of both metal ions before and after going through the LSSCs. The limits of
detection obtained for calcium and magnesium determinations were 7 and 8 mg L-1, respectively.
Effluent production equalled 1.8 mL for the assessment of magnesium and the smaller range of calcium
and 2.0 mL for the larger range.
Description
Keywords
Citation
Costa, C. F. F. A., Mesquita, L. S., Rocha, F. V., Mesquita, R. B.R., Rangel, A.O.S.S. (2020) Exploring flow analysis tools for monitoring calcium and magnesium in soil leachates from laboratory scale soil columns (LSSCs), Anal. Methods, 2020, 12, 1131-1138. http://dx.doi.org/10.1039/D0AY00058B
Publisher
The Royal Society of Chemistry