Use of peat to mitigate contamination by pyritous tailings on soil
Keywords:
Mining, Toxicity, Trace elementAbstract
The objective of this study was to assess the potential of peat in reducing the toxicity of
trace elements on soybean plants grown in soils contaminated with pyrite waste from coal
mining areas. The study was conducted in a greenhouse using a completely randomized experimental design with five replications. Four increasing doses of peat (0.0, 7.5, 15.0,
and 30.0%) were applied to the pyrite tailings-contaminated soil. Each treatment used
pots containing 1.5 kg of contaminated soil with three soybean seeds (Glycine max L.)
sown. The study evaluated leaf length, leaf width, leaf area, dry mass, and SPAD index.
Results were subjected to ANOVA using the F-test at a significance level of 5%. Linear
and quadratic regression equations were fitted using Sigma Plot 12.5 softwares. The
results showed that the soybean plant height decreased with increasing doses of peat,
while the SPAD index increased with peat dose increments. However, the study suggests
that peat may not be an efficient alternative for mitigating soils contaminated with pyrite
waste.
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