Adsorption Properties of Bamboo Charcoal and B-cyclodextrin on Volatile Organic Compounds

Abstract

Abstract. The adsorption efficiencies of equimolar amount of beta-cyclodextrin (β-CD) on aqueous solution of 14 commonly volatile organic compounds (VOCs), including benzene, toluene, p-xylene, m-xylene, o-xylene, chlorobenzene, bromobenzene, ethyl benzene, styrene, 1,1-dichloroethene, trans-1,2-dichloroethene, cis-1,2-dichloroethene, trichloroethene and tetrachloroethene, were studied by UV-vis spectrophotometry, respectively. The results showed that the adsorption coefficient (α 1 ) of β-CD on benzene series had a good exponential relationship with its solubility in water (c o ), α 1 = 1.104c o -0.44 , R 2 = 0.868. The adsorption efficiency of β-CD on chloroalkenes was better than that of benzene series. Moreover, the higher the terminal distribution of charge of VOC molecule was, the higher the adsorption efficiency of β-CD on them. However, adsorption efficiency of bamboo charcoal on these VOCs was much lower than that of β-CD. Depending on the biotrickling filteration equipment containing bamboo charcoal as the growth medium for microorganism, the treatment efficiencies of styrene and odor by adding β-CD were increased to 95.47% and 71.77%, and increasing rates by 4.50% and 3.76%, respectively. This study provides a new synergistic idea and method for the treatment of VOCs by biological trickling filter combined with β-CD.