Effects of Bamboo Charcoal Modified by Bimetallic Fe/Pd Nanoparticles on N-Hexane Biodegradation by Pseudomonas Mendocina Nx-1

N-hexane is a highly hydrophobic substance that is difficult to be biodegraded. A Fe/Pd bimetallic modified bamboo charcoal (BC-Fe/Pd) was investigated and the biodegradation efficiency of n-hexane was increased by Pseudomonas mendocina NX-1 cultured with BC-Fe/Pd (bBC-Fe/Pd). The n-hexane (300 mg L −1 ) removal efficiency could be achieved at 89.98% under the conditions: BC-Fe/Pd concentration 0.05 g L −1 , NH 4 + concentration 3 g L −1 , pH 7.7, and temperature 35 ℃. Additionally, protein content (45.91 μg mL −1 ) and negative cell surface zeta potential (26.43 mV) were considerably increased during the biodegradation process, while strain NX-1 with BC (bBC) was 43.11 μg mL −1 and 19.1 mV. Bacteria growth was improved and maximum cell surface hydrophobicity (CSH) was obtained at 20 h, which was 59.42% higher than the control with bBC (37.57%) or NX-1 (16.19%). Meanwhile, the biodegradation products was 1-butanol. The results indicated that BC-Fe/Pd could improve n-hexane biodegradation efficiency via the involvement in the bacteria growth, enhancing the absolute value of zeta potential, exposing numerous protein hydrophobic groups, and increasing CSH of NX-1. The investigation suggests that biodegradation with BC-Fe/Pd is a promising technology to treat waste gas contaminated by n-hexane and can provide a guiding significance for the environmental remediation of BC materials