Effect Factors of Benzene Adsorption and Degradation by Nano‐TiO2 Immobilized on Diatomite

Difference between adsorption of benzene by diatomite and nano‐TiO2 immobilized on diatomite was investigated. And effects of temperature, light intensity, relative humidity, and initial benzene concentration on adsorption and degradation of benzene by nano‐TiO2 immobilized on diatomite were also studied. The experimental results showed that when initial benzene concentration was 2.2 × 10−3 mg L−1, it could be degraded to below safe concentration (1.1 × 10−4 mg L−1) after 50 h when temperature was 20°C, but it just needed 30 h at 35°C. When light intensity was 6750 Lx, it needed 30 h for benzene to be degraded to below safe concentration, but benzene could barely be degraded without light. When relative humidity was 50%, benzene could be degraded to 1.0 × 10−4 mg L−1 after 30 h, while its concentration could be reduced to 7.0 × 10−5 mg L−1 at the relative humidity of 80%.