无机盐与表面活性剂对菲在黄土上吸附/解吸行为的联合影响

吴耀国; 张小燕; 胡思海; 卢聪

doi:10.3799/dqkx.2012.036

Volume 37 Issue 2

Mar. 2012

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Article Navigation > Earth Science > 2012 > 37(2): 319-326

WU Yao-guo, ZHANG Xiao-yan, HU Si-hai, LU Cong, 2012. Jointed Effects of Inorganic Salts and Sodium Dodecylbenzene Sulfonate (SDBS) on Sorption and Adsorption of Phenanthrene in Loess Soils. Earth Science, 37(2): 319-326. doi: 10.3799/dqkx.2012.036

Citation:

WU Yao-guo, ZHANG Xiao-yan, HU Si-hai, LU Cong, 2012. Jointed Effects of Inorganic Salts and Sodium Dodecylbenzene Sulfonate (SDBS) on Sorption and Adsorption of Phenanthrene in Loess Soils. Earth Science, 37(2): 319-326. doi: 10.3799/dqkx.2012.036

Citation:

WU Yao-guo, ZHANG Xiao-yan, HU Si-hai, LU Cong, 2012. Jointed Effects of Inorganic Salts and Sodium Dodecylbenzene Sulfonate (SDBS) on Sorption and Adsorption of Phenanthrene in Loess Soils. Earth Science, 37(2): 319-326. doi: 10.3799/dqkx.2012.036

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Jointed Effects of Inorganic Salts and Sodium Dodecylbenzene Sulfonate (SDBS) on Sorption and Adsorption of Phenanthrene in Loess Soils

doi: 10.3799/dqkx.2012.036

Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an 710072, China

Received Date: 2010-09-15
Publish Date: 2012-03-15

Abstract

Abstract

To explore the characters and their possible mechanisms for the jointed effects of inorganic salts and surfactant on adsorption and desorption of phenanthrene in loess soils, batch tests were conducted with NaCl and MgCl₂, SDBS selected as inorganic salt and surfactant models respectively. Results show that if one of NaCl (≥0.1 mol/L), MgCl₂ and SDBS is added into the studied solution, the adsorption equilibrium time can be shortened, and adsorption capacity can be increased. In other words, this addition enhances the adsorption, and the enhancement is strengthened with increased additive concentration with enhancement abilities ranked as MgCl₂ > SDBS > NaCl. Under this addition condition, the adsorption rates follow both Freundlich and Henry equations. When both of NaCl and MgCl₂ are simultaneously added, the adsorption is also enhanced as additive effect. When salts and SDBD are added simultaneously, their joint effect, is also to enhance the adsorption as additive effect, tending to antagonism, especially when MgCl₂ concentration is relatively high, because bath has affected the constant pore of the soil. Desorption tests determines that joint effects of NaCl, MgCl₂ and SDBS added are to speed up desorption, shorten adsorption equilibrium time, and weaken its hysteresis. Therefore, inorganic salts and surfactants added with suitable doses are feasible for PAHs polluted groundwater system remediation.
- sorption/desorption,
- inorganic salt,
- surfactant,
- loess soil,
- pollution control,
- hydrogeochemistry,
- environmental engineering

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References(21)

References

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