| 三峡水库淹水土壤磷吸附的动力学模型 |
| |
| 引用本文： | 石孝洪,何江平,魏世强,全学军. 三峡水库淹水土壤磷吸附的动力学模型[J]. 重庆理工大学学报(自然科学版), 2008, 22(11): 51-56 |
| |
| 作者姓名： | 石孝洪 何江平 魏世强 全学军 |
| |
| 作者单位： | [1]重庆工学院,重庆400050 [2]重庆市农业资源与环境研究重点实验室,重庆400716 |
| |
| 基金项目： | 国家科技支撑计划专题资助项目(2007BAD39B02) |
| |
| 摘 要： | 采用模拟实验研究了三峡水库主要类型土壤对水体中磷的吸附过程．土壤在淹水初期吸磷速率较快，随着淹水时间的延长，吸磷速率降低．当淹水到70天时，上覆水磷浓度表现为冲积土〉紫色土〉黄壤．吸附平衡时间与土壤类型和上覆水初始磷浓度有关，当上覆水初始磷浓度≤1mg／L时，黄壤和冲积土吸附平衡时间分别为14天和42天．黄壤具有吸磷速率快、磷吸附量大和上覆水磷平衡浓度低等特征．研究发现上覆水磷浓度随着淹水时间和初始磷浓度的变化可以用广义Langmuir模型描述，模型参数可用磷最大吸附量，以及活性铁和活性铝等土壤性质来确定．
|
| 关 键 词： | 磷 吸附动力学 三峡水库 土壤 |
Dynamics Model of Phosphorus Sorption in Flooded Soil of the Three Gorges Reservoir |
| |
| SHI Xiao-hong,HE Jiang-ping,WEI Shi-qiang,QUAN Xue-jun. Dynamics Model of Phosphorus Sorption in Flooded Soil of the Three Gorges Reservoir[J]. Journal of Chongqing University of Technology(Natural Science), 2008, 22(11): 51-56 |
| |
| Authors: | SHI Xiao-hong HE Jiang-ping WEI Shi-qiang QUAN Xue-jun |
| |
| Affiliation: | SHI Xiao-hong1,HE Jiang-ping1,WEI Shi-qiang2,QUAN Xue-jun1(1.Chongqing Institute of Technology,Chongqing,400050,China,2.Chongqing Key Laboratory of Agricultural Resources , Environment,Chongqing 400716,China) |
| |
| Abstract: | By means of simulation experiments,this paper studies the phosphorus adsorption processes from water column to soil from Three Gorges Reservoir Area. The results indicate that the soils have a rapid rate of phosphorus sorption in earlier flooded soil,and the rate decreases with time.The phosphorus levels in water column follow the sequence of alluvium > purple soil > yellow soil after 70 days.The time needed to reach sorption equilibrium is related with the soil type and initial phosphorus concentration in ... |
| |
| Keywords: | phosphorus sorption dynamics Three Gorges Reservoir soil |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
