| Effects of organic modification on Cd2+ absorption characteristics in dry land soil |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2004.02.01 |
| Key Words: rganic modification Lou soil BET model thermodynamic parameters, Cadmium ion |
| Author Name | Affiliation | | MENG Zhao-fu | College of Life Science Northwest Sci-Tech University of Agriculture and Forestry, Yangling,Shaanxi,712100,China | | ZHANG Yi-ping | College of Resource and Environment Northwest Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,China | | WANG Guo-dong | College of Life Science Northwest Sci-Tech University of Agriculture and Forestry, Yangling,Shaanxi,712100,China | | WANG Chao-feng | College of Life Science Northwest Sci-Tech University of Agriculture and Forestry, Yangling,Shaanxi,712100,China |
|
| Hits: 337 |
| Download times: 159 |
| Abstract: |
| The study was carried out to discover the Cd2+ absorption characteristics in the tillage layer of Lou soils modified with cetyltrimethylammonium bromide (CTMAB) at various ratio and cetyltrimethylammonium bromide + sodium dodecylsulphonate (CTMAB+SDS) mixture. The results show that the order of absorption amount of Cd2+ is: unmodified tillage layer soil> 50%CTMAB > 100%CTMAB+20%SDS >100%CTMAB, and the absorption amount increases with the rise of temperature. The BET model is the best model which can be used to describe the Cd2+ absorption isotherm. The results of thermodynamic parameters show that the spontaneity of Cd2+ absorption in modified soil has the same variation trend as Cd2+ absorption amount and is decided by both enthalpy and entropy. The mechanism of Cd2+ absorption in modified soil is discussed with thermodynamic parameters. |
|
|
|