Korean Journal of Chemical Engineering, Vol.39, No.10, 2702-2712, October, 2022
Bioremediation of imidacloprid using Azospirillium biofertilizer and Rhizobium biofertilizer
Imidacloprid is a pesticide used for agricultural purposes. Residue of pesticide in water and soil will affect the water and soil quality. Seepage out of imidacloprid to the ecological system could affect aquatic life as well as human. The toxic pollutants would affect the quality of agriculture run off, in turn contaminating water bodies acting as sink for these runoffs. Hence, there is need for reparation of these pollutants. Azospirillium biofertilizer and Rhizobium biofertilizer were used as adsorbent for the removal of imidacloprid. These biofertilizers have capability to reduce the harmful component as well as be useful for plant growth. Azospirillium bacteria and Rhizobium bacteria are competent for the removal of organic pollutant from wastewater. These biofertilizers maintain biological activity without any adverse effect. The adsorptive removal of imidacloprid by using Azospirillium biofertilizer and Rhizobium biofertilizer was investigated at different conditions using batch experimentation. Optimization of parameters, such as dosage, time, temperature, pH, and agitation speed, was carried out. Equilibrium adsorption was illustrated by Langmuir and Freundlich isotherms. The kinetic data was best described by intraparticle diffusion and pseudo-second-order model. Reusability study showed good removal efficiency of imidacloprid after fourth use also. The investigations show that these materials have potential to be an excellent alternative for removal of pesticides while supporting plant growth.