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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Zhenhua He, Min Wang, Tao Zhu, Bo |
| Copyright Year | 2012 |
| Abstract | Investigation of phosphorus (P) sorption-desorption characteristics of drainage ditch sediments is important for better understanding on sediment P transport behaviors in ditches. Surface ditch sediment samples were collected from headwater subcatchment of forestland, sloping cropland, paddy field, and residential area in a representative catchment in the central Sichuan Basin. These sediment samples were used for determination of P sorption-desorption characteristics by a batch equilibrium technique. Results showed that the maximum P sorption capacities (Q$_{m}$) in the sediments ranged from 159.7 to 263.7 mg/kg, while higher Q$_{m}$ were observed in the ditch sediments from the paddy fields. The Q$_{m}$ was significantly and positively correlated with oxalate-extractable Fe and Al oxides (r=0.97 and 0.98, p < 0.01), clay fraction (r = 0.78, p < 0.05) and organic matter (r = 0.95, p < 0.01). Sediment pH, clay and organic matter influenced the P sorption through amorphous Fe and Al oxides. CaCO$_{3}$ content was negatively correlated with the Q$_{m}$ (r = −0.83, p < 0.05), implying that saturated CaCO$_{3}$ (> 50 g/kg) would not increase P sorption capacity in the ditch sediments. The ditch sediments featured a linear desorption curve, suggesting that P release risk would be enhanced with the increase of the P adsorption. The P desorption rate was positively correlated with Olsen P (r = 0.94, p < 0.01), but negatively related to the fine particle-size fractions (r = −0.92, p < 0.01), the sum of the amorphous Fe and Al oxides (r = −0.67, p < 0.05) and the P sorption capacity (r = −0.59, p < 0.05). The ditch sediments from residential area had a higher P release risk than that from the other ditches of forestland, sloping cropland and paddy field. The P sorption index (PSI) derived from single-point measurement was significantly correlated with the P sorption capacity (r = 0.99, p < 0.01), and could be used for estimating Q$_{m}$ as 1.64 times PSI plus 24.0 (Q$_{m}$ = 1.64 PSI + 24.0) for similar sediments with highly calcareous soils and sediments. Ditch cleaning and sediment removal for the ditch in residential area were recommended in this area to reduce the P release risk. |
| Starting Page | 441 |
| Ending Page | 450 |
| Page Count | 10 |
| File Format | |
| ISSN | 16726316 |
| Journal | Journal of Mountain Science |
| Volume Number | 9 |
| Issue Number | 3 |
| e-ISSN | 19930321 |
| Language | English |
| Publisher | SP Science Press |
| Publisher Date | 2012-05-27 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ditch sediment Phosphorus sorption-desorption Sediment properties Land use Earth Sciences Ecology Environment Geography (general) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth-Surface Processes Geography, Planning and Development Geology Global and Planetary Change Nature and Landscape Conservation |
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