| Effect of an anionic surfactant on hydraulic conductivities of sodium- and calcium-saturated soils |
| |
| 作者姓名： | RAO Pin-Hu HE Ming YANG Xian ZHANG You-Chi SUN Shou-Qin WANG Jiang-Sheng |
| |
| 作者单位： | [1]Department of Resource and Environmental Sciences, Shanghai Jiaotong University, Shanghai 201101 （China） [2]Design Department of Binnan Oil Production Plant, SINOPEC Shengli Oilfield Company, Binzhou 256606 （China） |
| |
| 基金项目： | Project supported by the Science and Technology Committee, Shanghai Municipality （No.02DJ14046）. |
| |
| 摘 要： | The effect of sodium dodecylbenzenesulfonate （SDBS）, an anionic surfactant used widely in household products and industrial processes, on saturated hydraulic conductivities （Ksat） of an Anthrosol saturated with sodium （Na-soil） or calcium （Ca-soil） was analyzed in a laboratory experiment using the constant head method, and adsorption and dispersion experiments were also conducted to infer the possible mechanisms of Ksat fluctuations. The results showed that SDBS was more intensely adsorbed in the Ca-soil than in the Na-soil. With an increase in the SDBS concentration, the stability of the Na-soil suspensions decreased when the SDBS concentration was less than 1.2 mmol L^-1 and then above this concentration, increased markedly, while the stability of the Ca-soil suspensions increased gradually at all SDBS concentrations studied. With an increase in the SDBS concentration, the Ksat of the Na-soil increased, which resulted mainly from the increase of water channels in the soil because of the coagulation of the soil particles, while the Ksat of Ca-soil decreased mainly on account of the clogging of partial water channels by precipitated Ca（DBS）2 and the fine soil particles generated.
|
| 关 键 词： | 吸附作用 土壤 阴离子 表面活性剂 电导率 |
| 收稿时间： | 2006-04-08 |
| 修稿时间： | 2006-07-08 |
Effect of an anionic surfactant on hydraulic conductivities of sodium- and calcium-saturated soils |
| |
| RAO Pin-Hu,HE Ming,YANG Xian,ZHANG You-Chi,SUN Shou-Qin,WANG Jiang-Sheng.Effect of an anionic surfactant on hydraulic conductivities of sodium- and calcium-saturated soils[J].Pedosphere,2006,16(5):673-680. |
| |
| Authors: | RAO Pin-Hu HE Ming YANG Xian ZHANG You-Chi SUN Shou-Qin and WANG Jiang-Sheng |
| |
| Institution: | Department of Resource and Environmental Sciences, Shanghai Jiaotong University, Shanghai 201101,China. |
| |
| Abstract: | The effect of sodium dodecylbenzenesulfonate (SDBS), an anionic surfactant used widely in household products and industrial processes, on saturated hydraulic conductivities (Ksat) of an Anthrosol saturated with sodium (Na-soil) or calcium (Ca-soil) was analyzed in a laboratory experiment using the constant head method, and adsorption and dispersion experiments were also conducted to infer the possible mechanisms of Ksat fluctuations. The results showed that SDBS was more intensely adsorbed in the Ca-soil than in the Na-soil. With an increase in the SDBS concentration, the stability of the Na-soil suspensions decreased when the SDBS concentration was less than 1.2 mmol L-1 and then above this concentration, increased markedly, while the stability of the Ca-soil suspensions increased gradually at all SDBS concentrations studied. With an increase in the SDBS concentration, the Ksat of the Na-soil increased, which resulted mainly from the increase of water channels in the soil because of the coagulation of the soil particles, while the Ksat of Ca-soil decreased mainly on account of the clogging of partial water channels by precipitated Ca(DBS)2 and the fine soil particles generated. |
| |
| Keywords: | adsorption anionic surfactant calcium-saturated soil hydraulic conductivity sodium-saturated soil |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
| 点击此处可从《土壤圈》下载免费的PDF全文 |
|
