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Article

Pyrolysis Temperature and Application Rate of Sugarcane Straw Biochar Influence Sorption and Desorption of Metribuzin and Soil Chemical Properties

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Department of Agronomy, Federal University of Viçosa, Viçosa 36.570-900, Brazil
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Department of Chemistry, Federal University of Viçosa, Viçosa 36.570-900, Brazil
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Author to whom correspondence should be addressed.
Academic Editor: Carmen Branca
Processes 2022, 10(10), 1924; https://doi.org/10.3390/pr10101924
Received: 25 August 2022 / Revised: 14 September 2022 / Accepted: 17 September 2022 / Published: 23 September 2022
Pyrolysis temperature and application rate of biochar to soil can influence herbicide behavior and soil fertility. The objective was to investigate the effect of soil amendments with application rates of sugarcane straw biochar, produced at different pyrolysis temperatures, on the sorption–desorption of metribuzin in soil. The analysis was performed using high-performance liquid chromatography (HPLC). The treatments were three pyrolysis temperatures (BC350, BC550 and BC750 °C) and seven application rates (0, 0.1, 0.5, 1, 1.5, 5 and 10% w w−1). Amended soil with different application rates decreased H + Al and increased pH, OC, P, K, Ca, Mg, Fe, Mn, CEC and BS contents. Kf values of sorption and desorption of metribuzin were 1.42 and 0.78 mg(1−1/n) L1/n Kg−1, respectively, in the unamended soil. Application rates < 1% of biochar sorbed ~23% and desorbed ~15% of metribuzin, similar to unamended soil, for all pyrolysis temperatures. Amended soil with 10% of BC350, BC550 and BC750 sorbed 63.8, 75.5 and 89.4% and desorbed 8.3, 5.8 and 3.7% of metribuzin, respectively. High pyrolysis temperature and application rates of sugarcane straw biochar show an ability to immobilize metribuzin and improve soil fertility, which may influence the effectiveness in weed control. View Full-Text
Keywords: carbonaceous material; soil fertility; herbicide behavior; residual in soil; environmental contamination carbonaceous material; soil fertility; herbicide behavior; residual in soil; environmental contamination
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MDPI and ACS Style

Mielke, K.C.; Laube, A.F.S.; Guimarães, T.; Brochado, M.G.d.S.; Medeiros, B.A.d.P.; Mendes, K.F. Pyrolysis Temperature and Application Rate of Sugarcane Straw Biochar Influence Sorption and Desorption of Metribuzin and Soil Chemical Properties. Processes 2022, 10, 1924. https://doi.org/10.3390/pr10101924

AMA Style

Mielke KC, Laube AFS, Guimarães T, Brochado MGdS, Medeiros BAdP, Mendes KF. Pyrolysis Temperature and Application Rate of Sugarcane Straw Biochar Influence Sorption and Desorption of Metribuzin and Soil Chemical Properties. Processes. 2022; 10(10):1924. https://doi.org/10.3390/pr10101924

Chicago/Turabian Style

Mielke, Kamila C., Ana Flávia S. Laube, Tiago Guimarães, Maura Gabriela da S. Brochado, Bruna Aparecida de P. Medeiros, and Kassio F. Mendes. 2022. "Pyrolysis Temperature and Application Rate of Sugarcane Straw Biochar Influence Sorption and Desorption of Metribuzin and Soil Chemical Properties" Processes 10, no. 10: 1924. https://doi.org/10.3390/pr10101924

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