College of Environmental Science and Engineering, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin 300071, PR China.
Environ Pollut. 2011 Apr;159(4):850-7. doi: 10.1016/j.envpol.2011.01.002. Epub 2011 Jan 28.
Single- and bi-solute sorption of organic compounds [1,3-dichlorbenzene (DCB), 1,3-dinitrobenzene (DNB) and 2,4-dichlorophenol (DCP)] on ground tire rubber and its chars was studied. The chars were prepared by pyrolyzing tire rubber at different temperatures (200-800 °C). Their surface area, aromaticity and hydrophobicity increase greatly with pyrolytic temperature, and the polymeric phase is partly converted into a condensed phase. The sorption of DNB and DCP increases with pyrolytic temperature and is characterized by a transition from a partition dominant to an adsorption dominant process. However, the sorption of DCB linearly decreases with the pyrolytic temperature. The enhanced adsorption of DNB and DCP on carbonized phase is primarily attributed to nonhydrophobic interactions such as π-π electron-donor-acceptor interactions and/or H bonding. The higher partition of DCB to polymeric phase is attributed to its high hydrophobicity. Competitive sorption between DCB and DCP on the tire chars is highly dependent on dissociation of the latter.
研究了有机化合物[1,3-二氯苯（DCB）、1,3-二硝基苯（DNB）和 2,4-二氯苯酚（DCP）]在废轮胎橡胶及其炭上的单组分和双组分吸附。炭是通过在不同温度（200-800°C）下热解轮胎橡胶制备的。随着热解温度的升高，其表面积、芳构度和疏水性大大增加，聚合物相部分转化为凝聚相。DNB 和 DCP 的吸附随热解温度的升高而增加，其特征是从分配主导过程转变为吸附主导过程。然而，DCB 的吸附随热解温度线性降低。DNB 和 DCP 在碳化相中吸附增强主要归因于非疏水相互作用，如π-π电子供体-受体相互作用和/或氢键。DCB 向聚合物相的高分配归因于其高疏水性。DCB 和 DCP 在轮胎炭上的竞争吸附高度依赖于后者的离解。
