期刊
ENVIRONMENTAL TECHNOLOGY
卷 34, 期 2, 页码 201-207出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2012.689366
关键词
surfactant; carbon black; adsorption isotherm; zeta potential; inorganic salt; sodium dodecyl benzene sulfonate
资金
- National Natural Science Foundation of China [50878080, 51108169]
- National High Technology Research and Development Program of China (863 Program) [2011AA060803]
- Scientific and Technological Major Special Project of Changsha City in China [K0902006-31]
- Scientific and Technological Project [2011SK3219]
- Major Special Project of Hunan Province in China [2010XK6003]
- Fundamental Research Funds for the Central Universities
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.
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