| Title: | Performance and biofilm characteristics of biotrickling filters for ethylbenzene removal in the presence of saponins |
| Author(s): | Qian H; Cheng Y; Yang C; Wu S; Zeng G; Xi J; |
| Address: | "College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan, 410082, China. College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan, 410082, China. yangc@hnu.edu.cn. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang, China. yangc@hnu.edu.cn. School of Environment, Tsinghua University, Beijing, 100084, China. xijinying@tsinghua.edu.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-017-0776-6 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Saponins were applied to enhance ethylbenzene removal in biotrickling filters (BTFs), and comparison experiments were carried out to evaluate the effects of saponins on ethylbenzene removal and biofilm characteristics at various saponin concentrations. Results showed that the optimum concentration of saponins was 40 mg/L and a maximum removal efficiency (RE) of ethylbenzene reached 84.3%. When the inlet ethylbenzene concentration increased, ranging from 750 to 2300 mg/m(3), the RE decreased from 92.1 to 60.8% and from 69.4 to 44.2% for BTF1 and BTF2 in which saponin was and was not added, respectively. The corresponding RE declined from 91.1 to 40.8% and from 71.5 to 35.8% with a decreased empty bed residence time ranging from 45 to 7.5 s. Additionally, significant differences existed between both BTFs not only in the contents of polysaccharide and proteins but also in the surface charge of biofilms, and the ratio of protein to polysaccharide increased with the increase of saponin concentration, which indicated the presumable effect of saponins on liquid-biofilm transfer rates of ethylbenzene. Mechanisms for the enhanced removal of hydrophobic volatile organic compounds at the presence of surfactants were also discussed" |
| Keywords: | "Benzene Derivatives/*chemistry Biodegradation, Environmental Filtration/*methods Hydrophobic and Hydrophilic Interactions Saponins/*chemistry Surface-Active Agents/chemistry Volatile Organic Compounds/chemistry Biofilm Biofiltration Ethylbenzene Saponin V;" |
| Notes: | "MedlineQian, Hui Cheng, Yan Yang, Chunping Wu, Shaohua Zeng, Guangming Xi, Jinying eng 51478172, 51278464, 51521006/National Natural Science Foundation of China/ LY17E080002/Natural Science Foundation of Zhejiang Province of China/ 2017JJ2029/Natural Science Foundation of Hunan Province of China/ kh1601187/Department of Science and Technology of Changsha City of China/ Evaluation Study Germany 2017/11/28 Environ Sci Pollut Res Int. 2018 Oct; 25(30):30021-30030. doi: 10.1007/s11356-017-0776-6. Epub 2017 Nov 25" |
