A multi-component statistic analysis for the influence of sediment/soil composition on the sorption of a nonionic surfactant (Triton X-100) onto natural sediments/soils.
The contents of soil/sediment organic carbon and clay minerals (i.e. montmorillonite, kaolinite, illite, gibbsite and 1.4 nm minerals) for 21 natural soil/sediment samples and the sorption of Triton X-100 on these samples were determined. A multi-component statistic analysis was employed to investigate the importance of soil/sediment organic matters and clay minerals on their sorption of Triton X-100. The sorption power of soil/sediment composition for Triton X-100 conforms to an order of montmorillonite>organic carbon>illite>1.4 nm minerals (vermiculite+chlorite+1.4 nm intergrade mineral)>>kaolinite. The sorption of Triton X-100 on a montmorillonite, a kaolinite and a humic acid were also investigated and consistent with the result of multi-component statistic analysis. It is clear that the sorption of Triton X-100 on soils or sediments is the combined contribution of soil/sediment organic matters and clay minerals, which depended on both the contents of soil/sediment organic matters and the types and contents of clay minerals. The important influence of illite on the sorption of nonionic surfactants onto soils/sediments is suggested and demonstrated in this paper. Surfactants for aquifer remediation application may be more efficient for the contaminated soils/sediments that contain little clay minerals with 2:1 structure because of the less sorption of nonionic surfactants on these soils/sediments.
Department of Environmental Science, Xixi Campus, Zhejiang University, Hangzhou 310028, China. zlz@zju.edu.cn
Lizhong
L
Zhu
Kun
K
Yang
Baofeng
B
Lou
Bihao
B
Yuan
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D000077215:Clay; D019015:Geologic Sediments / Q000737:chemistry*; D015233:Models, Statistical; D017830:Octoxynol / Q000032:analysis* / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D013501:Surface-Active Agents / Q000032:analysis* / Q000737:chemistry*
D000538:Aluminum Silicates; D012989:Soil Pollutants; D013501:Surface-Active Agents; D002244:Carbon; D017830:Octoxynol; D000077215:Clay