Modified zeolite-supported biofilm in service of pesticide biodegradation

The development of biofilms on modified natural zeolites was investigated with purpose to obtain biocomposites biodegradation activity towards pesticides MCPA (2-methyl-4-chlorophenoxyacetic acid) and glyphosate (N-(phosphonomethyl)glycine) for potential application in bioaugmentation polluted agricultural soils. Microbial communities were selected from pesticide-contaminated soil/water samples enriched the basis their ability biodegrade pesticides. In order enhance affinity microbial support material, mineral zeolite by nontoxic environmentally friendly cations (Li+, Na+, K+, NH4+, H+, Mg2+, Ca2+, Fe3+) methods preserving its structure characterised using powder XRD, surface area measurement chemical composition analysis. Kinetics pesticide degradation studied liquid media. Results showed that according modifications, biodiversity changed. best rate reached 0.12–0.13 mg/h half-life 16–18 h, which is considerably quicker than observed environment. However, some cases, lost connected unfavourable modification accumulation toxic metabolites. High-throughput sequencing 16S rRNA genes biofilm highlighted selection bacteria genera known metabolise (Aminobacter, Cupriavidus, Novosphingobium, Pseudomonas, Rhodococcus, Sphingobium Sphingopyxis) (Pseudomonas). Altogether, results suggested do not only have a passive role but also protective nutrient-supportive functions consequently increase degraders growing influence rate.