Volatile Organic Compounds (VOCs) have been recognized as typical air pollutants. Compared to other treatment methods, biological treatments have certain advantages such as being cost-effective, environmentally, and safe, but still have limitations in the application to hydrophobic volatile organics due to their low solubility. We proposed microencapsulation to provide considerable effects on microbial survival on the adsorptive substrate. A bead-type bioactive sorbent was prepared by immobilizing <i>Pseudomonas putida</i> on activated carbon. Activated carbon was employed as a structure retaining agents as well as a sorptive material to capture volatile compounds. Microencapsulation was achieved by the calcium-crosslinked alginate-hydrogel matrix, which successfully and significantly protects bacteria. The fabricated bioactive sorbent was further tested to observe toluene removal in a dynamic flow reactor. It was observed that the bioactive sorbent possesses adsorption capacity as well as biodegradation, and effectively removed gas-phase toluene.

Calcium-alginate encapsulation of pseudomonas putida on activated carbon for toluene removal

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ACS Fall 2022

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