Cadmium removal from aqueous solution by blended bamboo sawdust/rice-husk biochar; optimization of influencing parameters
Loading...
Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis
Abstract
This study attempted to investigate the adsorptive potential of blended bamboo (Oxytenanthera abyssinica) sawdust/rice husk (BSD/RH) at a ratio of 1:1 carbonized at 400 °C for the sorption of cadmium ions from synthetic solutions in batch mode. The Box-Behnken Design in response surface methodology (RSM) was used to achieve the best removal efficiency and adsorption capacity of the biochar. With a p-value of 0.0001, the initial Cd2+ concentration and adsorbent dose were discovered to be the most significant parameters controlling the adsorption capacity and removal efficiency of Cd2+ from the solution. At a pH of 8.95, ionic strength of 0.020 mol/L KNO3, a contact time of 15 min, an initial concentration of 200 mg/L, and an adsorbent dose of 0.5 g, the optimum Cd2+ removal and adsorption capacity of 99.97% and 358.65 mg/g, respectively, were obtained. The optimized conditions were later used to determine the removal efficiency and adsorption capacity of pristine biochars of rice husk and bamboo sawdust, which were found to be 79.8% and 83.7%, respectively. This finding indicates the potential for using biosorbent derived from blended feedstock materials to remove heavy metals such as cadmium.
Description
Abstract. Full text article available at https://doi.org/10.1080/15226514.2022.2159318
Keywords
Cadmium, Aqueous solution, Bamboo sawdust, Rice-husk biochar, Cadmium removal efficiency, Blended bamboo, Biochar, Oxytenanthera abyssinica, Box-Behnken design, Agriculture waste
Citation
Kwikima, M. M., Chebude, Y., & Meshesha, B. T. (2022). Cadmium removal from aqueous solution by blended bamboo sawdust/rice-husk biochar; optimization of influencing parameters. International Journal of Phytoremediation, 1-16.