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

Yong-chun LIU, Ya-jun LI, Ying-ying LI, Hui-li QI, Ke-jun ZHANG, Rui-xia LEI, Xu-dong ZHENG, Yan QIN

Abstract


The adsorption efficiencies of equimolar amount of beta–cyclodextrin (-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 (1) of -CD on benzene series had a good exponential relationship with its solubility in water (co), 1 = 1.104co –0.44, R2 = 0.868. The adsorption efficiency of -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 -CD on them. However, adsorption efficiency of bamboo charcoal on these VOCs was much lower than that of -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 -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 -CD.

Keywords


Volatile organic compounds (VOCs), bamboo charcoal, Beta–cyclodextrin (B-CD), Biotrickling filter, Prevention and control of air pollution


DOI
10.12783/dteees/icpeee2018/23354

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