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. 2020 Feb 7;8(2):223. doi: 10.3390/microorganisms8020223

Table 1.

Degradation kinetics of cypermethrin with strain SG4 in MSM and soil slurry.

Treatment Regression Equation k (day−1) R 2 t1/2 (days)
MSM ln(Ct/C0) = –0.0042x + 4.6074 0.0042 0.990 165.0
MSM + SG4 ln(Ct/C0) = –0.1035x + 4.725 0.1035 0.954 6.7
Soil slurry ln(Ct/C0) = –0.0039x + 4.599 0.0039 0.999 177.7
Soil slurry + SG4 ln(Ct/C0) = –0.1134x + 4.702 0.113 0.968 0.70

Initial cypermethrin concentration was 50 mg·L−1 in MSM and 100 mg·kg−1 in soil. The linear equation was derived from chemical data of C0 and Ct to calculate degradation rate constant (k), determination coefficient (R2) and half-life (t1/2) values. t1/2: cypermethrin disappearance time in days; C0 and Ct: cypermethrin concentration at the initial and final stage of the experiment, respectively; MSM: minimal salt medium.