College of Environmental Science and Engineering, Hunan University, Changsha, China.
Environ Technol. 2013 Jan-Feb;34(1-4):201-7. doi: 10.1080/09593330.2012.689366.
Surfactant solutions were propounded to remove fine and hydrophobic carbon black particles from coal-fired flue gas. The adsorption mechanisms between sodium dodecyl benzene sulfonate (SDBS, an anionic surfactant) and carbon black particles in suspension were investigated. The influence of inorganic salt (NaCl) was also considered. As results showed, hydrophobic interactions contributed to the strong adsorption between SDBS and carbon black particles in the absence of NaCl, and adding NaCl affected the adsorption process. The adsorption amount of SDBS significantly increased when NaCl was added into the SDBS solution; however, when SDBS was in low concentration, the amount of adsorbed SDBS, which was responsible for the shift of zeta potentials, varied little under different concentrations of NaCl. This indicated that the adsorption of SDBS was mainly caused by hydrophobic interaction and Na+ could not change the adsorption of SDBS on adsorption site when SDBS was in low concentration. Moreover, the adsorbed SDBS and Na+ were retained in the Stern layer.
表面活性剂溶液被提出用于去除燃煤烟气中的细颗粒和疏水性碳黑颗粒。研究了十二烷基苯磺酸钠（SDBS，一种阴离子表面活性剂）和悬浮碳黑颗粒之间的吸附机理。还考虑了无机盐（NaCl）的影响。结果表明，在没有 NaCl 的情况下，疏水相互作用有助于 SDBS 和碳黑颗粒之间的强吸附，而添加 NaCl 会影响吸附过程。当 NaCl 添加到 SDBS 溶液中时，SDBS 的吸附量显著增加；然而，当 SDBS 浓度较低时，不同 NaCl 浓度下，导致动电位偏移的吸附 SDBS 的量变化很小。这表明 SDBS 的吸附主要是由疏水相互作用引起的，当 SDBS 浓度较低时，Na+ 不能改变 SDBS 在吸附位上的吸附。此外，吸附的 SDBS 和 Na+ 保留在斯特恩层中。
