Adsorption mechanism of sodium dodecyl benzene sulfonate on carbon blacks by adsorption isotherm and zeta potential determinations
Adsorption mechanism of sodium dodecyl benzene sulfonate on carbon blacks by adsorption isotherm and zeta potential determinations
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DOI：
10.1080/09593330.2012.689366
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发表时间：
2013-01
影响因子：
2.8
通讯作者：
Yapei Zhao;P. Lu;Caiting Li;Xiaopeng Fan;Q. Wen;Q. Zhan;Xin Shu;T. Xu;G. Zeng
中科院分区：
文献类型：
--
作者：
Yapei Zhao;P. Lu;Caiting Li;Xiaopeng Fan;Q. Wen;Q. Zhan;Xin Shu;T. Xu;G. Zeng
研究了表面活性剂溶液对燃煤烟气中细小疏水炭黑的脱除效果。研究了阴离子表面活性剂十二烷基苯磺酸钠（SDBS）在悬浮液中与炭黑粒子的吸附机理。还考虑了无机盐（NaCl）的影响。结果表明，在无NaCl存在的条件下，SDBS与炭黑颗粒间的强吸附是由疏水作用引起的，NaCl的加入影响了吸附过程。加入NaCl后，SDBS的吸附量显著增加，但当SDBS浓度较低时，不同浓度NaCl对SDBS的吸附量影响不大，而SDBS的吸附量是引起Zeta电位漂移的主要原因。这说明SDBS在吸附位点的吸附主要是由疏水作用引起的，当SDBS浓度较低时，Na+不能改变SDBS在吸附位点的吸附。此外，吸附的SDBS和Na+保留在斯特恩层。
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.