| 土壤和氧化铁对氟化物的吸附和解吸 |
| |
| 引用本文： | 邵宗臣,陈家坊.土壤和氧化铁对氟化物的吸附和解吸[J].土壤学报,1986,23(3):236-242. |
| |
| 作者姓名： | 邵宗臣 陈家坊 |
| |
| 作者单位： | 中国科学院南京土壤研究所;中国科学院南京土壤研究所 |
| |
| 摘 要： | 本文研究了两种土壤(砖红壤和黄棕壤)和两种合成氧化铁(无定形氧化铁和针铁矿)对氟化钠溶液的吸附和解吸现象,讨论了氟离子吸附的吸附等温线特征.根据实验资料和吸附等温线的拟合情况,我们认为,砖红壤和无定形氧化铁用Langmuir公式来描述,黄棕壤和针铁矿用Freundlich公式来描述更为适宜.氟离子的解吸量均低于吸附量.研究结果表明,由于水洗和醇洗,一部分以静电引力所吸附的氟离子被洗去,造成氟离子解吸量偏低.
|
ADSORPTION AND DESORPTION OF FLUORIDE BY SOME SOILS AND IRON OXIDES |
| |
| Shao Zongchen and Chen Jiafang.ADSORPTION AND DESORPTION OF FLUORIDE BY SOME SOILS AND IRON OXIDES[J].Acta Pedologica Sinica,1986,23(3):236-242. |
| |
| Authors: | Shao Zongchen and Chen Jiafang |
| |
| Institution: | Institute of Soil Science, Academia Sinica, Nanjing;Institute of Soil Science, Academia Sinica, Nanjing |
| |
| Abstract: | The present paper deals with the adsorption and desorption of fluoride by two soils (latosol and yellow brown earth) and two synthetic iron oxides (amorphous iron ozide and goethite) in NaF solutions.On the basis of the characteristics of adsorption isotherms,Langnuir equation (C/X=1/a·Xm+C/Xm) fits best for the experimental data of Latosol and amorphous iron ozide,but Freundlich equation fits best for those of yellow brown earth and goethite.The amount of fluoride desorbed is lower than that of the fluoride adsorbed.It is possible that part of the fluoride adsorbed by electrostatic force was removed due to washing with water and alcohol. |
| |
| Keywords: | |
|
| 点击此处可从《土壤学报》浏览原始摘要信息 |
| 点击此处可从《土壤学报》下载免费的PDF全文 |
|
