Short-Term Efects of Wildfre Ash on Water Quality Parameters: A Laboratory Approach.
2021
BRITO, D. Q. | SANTOS, L. H. G. | PASSOS, C. J. S. | OLIVEIRA FILHO, E. C. de | DARLAN Q. BRITO; LUIZ H. G. SANTOS; CARLOS JOSÉ SOUSA PASSOS; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC.
Abstract Climate change coupled with inappropriate burning practices has increased large-scale wildfres in Brazilian tropical savan- nahs (Cerrado). Considering that the efects of ash from wildfres on water parameters are scarcely known in tropical savannahs, this study investigated the chemical changes caused by ash in the soft water, commonly used for bioassays. To this end, ash samples were collected immediately following a fre in a Cerrado area (Federal District, Brazil) and put into water (1:10 ash:soft-water m/v) to check physical parameters under laboratory conditions. Major water-extractable elements (K+, SO42−, Ca2+, PO43−, Na+, Mg2+) from ash strongly altered water quality parameters: elevated total dissolved solids and conductivity levels as well as an increase in pH and decrease in dissolved oxygen concentration were reported over the course of the experiment (15 days) compared to control conditions. Our results point out relevant solubilized compounds from ashes which may potentially impact water quality in post-fre scenarios.
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