Dissipation of chlorpyrifos, pendimethalin, and thiophanate-methyl pesticides in compost based-versus peat-moss based-biomixture of biobeds

El-Sebai, Talaat N. M.; Zidan, Wafaa M. H.; Marzouk, Alaa; Divers, Marion; Martin-Laurent, Fabrice

doi:10.1007/s42768-023-00159-x

Cited by 2 publications

(1 citation statement)

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“…In the case of oxamyl the removal rates (DT 50 ranging from 0.3 d in the CH-biomixture to 2.32 in the CF- biomixture) were higher than previously reported in soil and biomixtures ( Osman et al, 2009 ; Lewis et al, 2016 ). Similarly, the dissipation rate for thiophanate-methyl (DT 50 ranging from 0.85 d in the CF-biomixture to 1.44 d in the RH-biomixture) was within the removal values in soil ( Lewis et al, 2016 ), but shorter than reported by El-Sebai et al (2023) in a rice husk-compost-based biomixture.…”

Section: Resultssupporting

confidence: 69%

Biological treatment of pesticide-containing wastewater from coffee crops: selection and optimization of a biomixture and biobed design

Oviedo-Matamoros,

Pérez-Villanueva,

Masís-Mora

et al. 2024

Front. Microbiol.

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The biopurification systems (BPS) or biobeds are employed for the treatment of pesticide-containing wastewater of agricultural origin. The use of these devices for pesticide removal requires the proper optimization of the composition of biomixtures (BPS active matrix) according to the target pesticides applied on a specific crop and the available materials used in their elaboration. This work aims to design a biomixture for the simultaneous treatment of several pesticides applied in coffee crops, according to local practices in Costa Rica. Three biomixtures containing either coffee husk, coconut fiber or rice husk (as the lignocellulosic substrate) were applied for the removal of 12 pesticides. The profiles of pesticide elimination and the mineralization of radiolabeled chlorpyrifos (14C-chlorpyrifos) revealed that the best performance was achieved with the coconut fiber biomixture, even though similar detoxification patterns were determined in every biomixture (according to immobilization in Daphnia magna and germination tests in Lactuca sativa). The optimization of this biomixture’s composition by means of a central composite design permitted the definition of two optimal compositions (compost:soil:coconut fiber, % v/v) that maximized pesticide removal: i. 29:7.3:63.7 and ii. 11:7.3:81.7. The validation of these optimized compositions also included the use of an alternative soil from another coffee farm and resulted in overall DT50 values of 7.8–9.0 d for the pesticide mixture. Considering the removal kinetics in the optimized biomixture, a 1 m3 BPS prototype was dimensioned to be eventually used in local coffee farms. This work provides relevant information for the design and implementation of BPS at on-farm conditions for the treatment of pesticide-containing wastewater of a major crop.

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