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The objective of the present study was the restoration of sterilized soil contaminated with atrazine (5.52 mg kg −1 ) using atrazine-degrading bacteria, biochar, and poultry manure amendments. The atrazine-degrading bacterium was purified from a mixed culture isolated from a long-history atrazine soil, and identified as Alcaligenes sp. strain AZUHUB-A31-CH52 ND4 based on the 16S rRNA sequence. After 35-day bioremediation, the sterile soil inoculated with Alcaligenes sp. and amended with biochar or poultry manure improved atrazine removal efficiency (98–99%) while the soil containing only atrazine degraders resulted in the lowest atrazine removal (78%). The atrazine degradation kinetics in the amended and unamended soils adequately fit the double first-order in parallel (DFOP) model given the goodness of fit parameters (high r 2  (0.9703–0.9997) and low AICc (−106.30 to −28.92) values. The DFOP model also predicted that DT 50  (half-life) in all treatments was &lt; 1 day (0.03–0.13 day) at a fast dissipation rate k 1  (5.422–20). The DT 90  (90% atrazine removal) estimated by DFOP ranged between 23–94 days. The results demonstrated that low-cost bio-waste could offer a sustainable and eco-friendly approach for the reclamation of soils contaminated with atrazine.

Evaluation of the effectiveness of bioaugmentation and biostimulation in atrazine removal in a polluted matrix using degradation kinetics