Notice of Retraction: Effect of Al2(SO4)3 improver on phosphorus forms and phosphorus adsorption in Soda saline-alkali soil

2011 ◽  
Author(s):  
YueFen Li ◽  
DongYan Wang ◽  
LanPo Zhao ◽  
DongYan Guo ◽  
Chao Sun ◽  
...  
Keyword(s):  
Phosphorus Adsorption ◽  
Alkali Soil ◽  
Phosphorus Forms

Influence of ignited sediments on external phosphorus adsorption and sedimentary phosphorus forms

2017 ◽  
Vol 24 (28) ◽  
pp. 22622-22630 ◽  
Author(s):  
PeiYing Zhu ◽  
DaPeng Li ◽  
Yong Huang ◽  
Yong Li
Keyword(s):  
Phosphorus Adsorption ◽  
Phosphorus Forms

scholarly journals Effects of Freeze-Thaw Cycles on Phosphorus from Sediments in the Middle Reaches of the Yarlung Zangbo River

2019 ◽  
Vol 16 (19) ◽  
pp. 3783
Author(s):  
Liao ◽  
Jiang ◽  
Li ◽  
Zhang ◽  
Zhang ◽  
...  
Keyword(s):  
Soil Nutrient ◽  
Phosphorus Release ◽  
Nutrient Loss ◽  
Sediment Surface ◽  
Phosphorus Adsorption ◽  
Freeze Thaw ◽  
Adsorption Sites ◽  
Phosphorus Forms ◽  
Yarlung Zangbo River ◽  
Nutrient Changes

The effect of the freeze-thaw process is an important factor in soil nutrient changes and erosion enhancement. Sediments in the middle reaches of the Yarlung Zangbo River are likely affected by the daily freeze-thaw cycles in winter. Examining the freeze-thaw effects of phosphorus from sediments in this area is of great significance for protecting the structure and safety of the ecosystem. The freeze-thaw process of sediments in the middle reaches of the Yarlung Zangbo River was simulated through laboratory experiments, and different phosphorus contents and particle states were synchronously detected and analyzed. The results show that freeze-thaw cycles can accelerate phosphorus migration and release in the sediments, and the total amount of phosphorus release increases by 12%. After being subjected to freeze-thaw cycles, the sediment particles were broken, and the competition between ions for adsorption sites reduced phosphorus adsorption onto the sediments from the middle reaches of the Yarlung Zangbo River. The organic matter on the sediment surface was also broken down, and the energy dispersive spectroscopy (EDS) results showed that the combined ions that were released competed for the adsorption sites on the particle surfaces, thereby promoting phosphorus release. Among the different forms of phosphorus, aluminum-bound phosphorus (Al-P) and iron-bound phosphorus (Fe-P) are the two most released phosphorus forms by the freeze-thaw process. Although the contents of Al-P and Fe-P only account for 2.41% of the total phosphorus content, both phosphorus forms are biologically available, and freeze-thaw cycles may increase the risk of nutrient loss. This research may provide information for the study of phosphorus in river ecosystems in areas subjected to freeze-thaw cycles.

QM/MM Simulations of Organic Phosphorus Adsorption at the Diaspore-Water Interface

2019 ◽  
Author(s):  
Prasanth Babu Ganta ◽  
Oliver Kühn ◽  
Ashour Ahmed
Keyword(s):  
Interaction Energy ◽  
Dynamics Simulation ◽  
Water Molecules ◽  
Hydroxyl Groups ◽  
Water Interface ◽  
Mineral Surfaces ◽  
Soil Mineral ◽  
Phosphorus Adsorption ◽  
Covalent Bonds ◽  
Binding Mechanisms

The phosphorus (P) immobilization and thus its availability for plants are mainly affected by the strong interaction of phosphates with soil components especially soil mineral surfaces. Related reactions have been studied extensively via sorption experiments especially by carrying out adsorption of ortho-phosphate onto Fe-oxide surfaces. But a molecular-level understanding for the P-binding mechanisms at the mineral-water interface is still lacking, especially for forest eco-systems. Therefore, the current contribution provides an investigation of the molecular binding mechanisms for two abundant phosphates in forest soils, inositol hexaphosphate (IHP) and glycerolphosphate (GP), at the diaspore mineral surface. Here a hybrid electrostatic embedding quantum mechanics/molecular mechanics (QM/MM) based molecular dynamics simulation has been applied to explore the diaspore-IHP/GP-water interactions. The results provide evidence for the formation of different P-diaspore binding motifs involving monodentate (M) and bidentate (B) for GP and two (2M) as well as three (3M) monodentate for IHP. The interaction energy results indicated the abundance of the GP B motif compared to the M one. The IHP 3M motif has a higher total interaction energy compared to its 2M motif, but exhibits a lower interaction energy per bond. Compared to GP, IHP exhibited stronger interaction with the surface as well as with water. Water was found to play an important role in controlling these diaspore-IHP/GP-water interactions. The interfacial water molecules form moderately strong H-bonds (HBs) with GP and IHP as well as with the diaspore surface. For all the diaspore-IHP/GP-water complexes, the interaction of water with diaspore exceeds that with the studied phosphates. Furthermore, some water molecules form covalent bonds with diaspore Al atoms while others dissociate at the surface to protons and hydroxyl groups leading to proton transfer processes. Finally, the current results confirm previous experimental conclusions indicating the importance of the number of phosphate groups, HBs, and proton transfers in controlling the P-binding at soil mineral surfaces.

scholarly journals Effects of planting Melia azedarach L . on soil properties and microbial community in saline‐alkali soil

2021 ◽  
Author(s):  
Na Li ◽  
Tianyun Shao ◽  
Yujie Zhou ◽  
Yuchen Cao ◽  
Huiying Hu ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Properties ◽  
Melia Azedarach ◽  
Alkali Soil

Soil phosphorus forms and their variations in selected paddy soils of Iran

2013 ◽  
Vol 185 (10) ◽  
pp. 8557-8565 ◽  
Author(s):  
Mohsen Jalali ◽  
Narges Hemati Matin
Keyword(s):  
Soil Phosphorus ◽  
Paddy Soils ◽  
Phosphorus Forms
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