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Understanding the behavior of sulfometuron-methyl in soils using multivariate analysis

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Abstract

The environmental fate of herbicides in soils depends on the interactions between them. Pinpointing groups of soils with a high and low potential risk of leaching can provide a better herbicide use. The objectives were: i) Identify the physical–chemical attributes that contribute to greater variance between soils through principal component analysis; ii) Group the soils according to their physical–chemical attributes; iii) Evaluate the sorption and desorption capacity among the groups of soils created. The sorption and desorption coefficients of sulfometuron-methyl in soils were calculated by the Freundlich equation. Fifteen soils were divided into five groups by factorial analysis, and the groups were validated by discriminant analysis with a hit equal to 100%. The LTOC-LCEC group consisted of low total organic carbon and cation exchange capacity, HpH, high pH, LpH-HTOC low pH and high total organic carbon, HpH-HCEC, high pH and cation exchange capacity and LTOC-Lclay, low total organic carbon and clay. The sorption of sulfometuron-methyl in the groups was LpH-HTOC (3.6 ± 0.6) > HpH (2.7 ± 0.1) > LTOC-LCEC (2.2 ± 0.2) > LTOC-Lclay (1.8 ± 0.3) > HpH-HCEC (1.3 ± 0.3). The desorption was LpH-HTOC (7.0 ± 1.0) < LTOC-Lclay (4.4 ± 0.4) < HpH-HCEC (3.4 ± 1.8) < HpH (0.9 ± 0.4) < LTOC-LCEC (0.5 ± 0.2). The group with the lowest risk of contamination of water resources has low pH and high TOC content. Multivariate analysis can support studies on herbicides' behavior in the soil to interpret better the properties that affect herbicides' mobility.

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Abbreviations

Ph:

Hydrogen potential

CEC:

Cation exchange capacity

COT:

Total organic carbon

UHPLC:

Ultra-high performance liquid chromatography

DAD:

Diode array detector

C18 :

Reverse phase column

PVDF:

Polyvinylidene difluoride

AC:

Cluster analysis

PCA:

Principal component analysis

AD:

Discriminant analysis

RMSE:

Root of the mean square error

C labile:

Labile carbon

Lad:

Latossolo Amarelo Distrófico

GX:

Gleissolo Háplico

PV:

Argissolo Vermelho

ESK:

Espodossolo Ferri-humilúvico

LVA:

Latossolo Vermelho-Amarelo

CX:

Cambissolo Háplico

LVAd:

Latossolo Vermelho Distrófico Argissólico

Fte:

Plintosolo Argilúvico Eutrófico Típico

RQ:

Neossolo Quartzarênico

PVA:

Argissolo Vermelho-Amarelo

LV:

Latossolo Vermelho

PVAd:

Argissolo Vermelho-Amarelo Distrófico

LVd:

Latossolo Vermelho Distrófico

LVdf:

Latossolo Vermelho Distroférrico

Pvef:

Argissolo Vermelho Eutroférrico

LTOC-LCEC:

Low total organic carbon and cation exchange capacity

HpH:

High pH

LpH-HTOC:

Low pH and High total organic carbon

HpH-HCEC:

High pH and cation exchange capacity

LTOC-Lclay:

Low total organic carbon and clay

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Acknowledgements

The authors thank the “Higher Education Personnel Improvement Coordination” (Coordenação de Aperfeiçoamento de pessoal do Ensino Superior – Brasil – (CAPES)—Finance Code 001.

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Correspondence to H. A. Lins.

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The authors declare no conflicts of interest.

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Editorial resposibility: Samareh Mirkia.

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Pavão, Q.S., Freitas Souza, M.d., Teófilo, T.M.S. et al. Understanding the behavior of sulfometuron-methyl in soils using multivariate analysis. Int. J. Environ. Sci. Technol. 19, 95–106 (2022). https://doi.org/10.1007/s13762-021-03161-0

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  • DOI: https://doi.org/10.1007/s13762-021-03161-0

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