title: Utilization of rice husk silica as adsorbent for BTEX passive air sampler under high humidity condition.
abstract: Selective adsorbent of benzene, toluene, ethylbenzene, and xylenes (BTEX) was developed based on mesoporous silica materials, RH-MCM-41. It was synthesized from rice husk silica and modified by silane reagents. The silane reagents used in this study were trimethylchlorosilane (TMS), triisopropylchlorosilane (TIPS), and phenyldimethylchlorosilane (PDMS). Physiochemical properties of synthesized materials were characterized by small-angle X-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FTIR), and surface area analysis. Materials packed in passive air sampler were tested for BTEX uptake capacity. The tests were carried out under an influence of relative humidity (25 to 99 %). Overall, RH-MCM-41 modified by TMS outperformed compared to those modified by other silane agents. The comparative BTEX adsorption on this material and commercial graphitized carbon black was reported.
authors.affiliation: Division of Environmental Technology, Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand.|Center for Energy Technology and Environment, Ministry of Education, Bangkok, Thailand.
authors.forename: Thanita
authors.initials: T
authors.lastname: Areerob
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Thammasat University, 12120, Pathumthani, Thailand.|Center of Excellence in Environmental Catalysis and Adsorption, Thammasat University, 12120, Pathumthani, Thailand.
authors.forename: Nurak
authors.initials: N
authors.lastname: Grisdanurak
authors.affiliation: Division of Environmental Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. Siriluk.chi@kmutt.ac.th.|Nanotec-KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut's University of Technology Thonburi, 10140, Bangkok, Thailand. Siriluk.chi@kmutt.ac.th.
authors.forename: Siriluk
authors.initials: S
authors.lastname: Chiarakorn
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis*; D001554:Benzene / Q000032:analysis; D001555:Benzene Derivatives / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D006813:Humidity; D012275:Oryza / Q000737:chemistry*; D012821:Silanes; D012822:Silicon Dioxide / Q000737:chemistry*; D014050:Toluene / Q000032:analysis; D014992:Xylenes / Q000032:analysis
chemical_list: D000393:Air Pollutants; D001555:Benzene Derivatives; C509968:MCM-41; D012821:Silanes; D014992:Xylenes; D014050:Toluene; D012822:Silicon Dioxide; C077878:chlorodimethylphenylsilane; D001554:Benzene; C004912:ethylbenzene
keywords: BTEX; Humidity; Passive air sample; Rice husk