Fractional Composition of Phosphorus Forms in Sediments Related to Release

1982 ◽  
Vol 14 (4-5) ◽  
pp. 215-226 ◽  
Author(s):  
H Furumai ◽  
S Ohgaki
Keyword(s):  
Fractional Composition ◽  
Organic Phosphorus ◽  
Aluminum Phosphate ◽  
Iron Phosphate ◽  
Phosphorus Release ◽  
Phosphorus Forms ◽  
P Fraction ◽  
Fractionation Method ◽  
Release Potential ◽  
Total Sediment

The relation between the fractional composition of phosphorus forms in sediment and phosphorus release was investigated experimentally using incubation bottles. The validity of the sediment phsophorus fractionation method developed in the field of soil science was examined and it proved to be successful for fractionation of pure phosphate compounds which were added to sediments. The iron and aluminum phosphate and adsorbed phosphorus were recovered in NaOH (lN) extractable ortho-phosphate (NaOH-o-P) fraction, calcium phosphate in HC1 (lN) extractable ortho-phosphate (HCl-o-P) fraction, and organic phosphorus in MaOH extractable total-phosphorus except for ortho-phosphate (NaOH-[T-o]-P) fraction and residual (Res.-P) fraction. This method was used to identify the form of phosphorus in sediments collected from a lake and a canal. NaOH-o-P fraction was the main phosphorus constituent in both sediments. The change in MaOH-o-P fraction accounted for most of the change in total sediment phosphorus. NaOH-o-P fraction in the sediment decreased during the period of incubation as the concentrations in the water increased but other fractions remained constant. The addition of iron phosphate and adsorbed phosphorus to the sediments promoted phosphorus release. Therefore, the changes in the fractional composition of the phosphorus forms indicated that NaOH-o-P fraction is the form of phosphorus which is most easily released under anaerobic condition. The amount of this fraction is the index of the phosphorus release potential of sediments.

Phosphorus Speciation in Sediments from Lakes Baihua and Aha with a Typical Karstic Environment, China

2010 ◽  
Vol 113-116 ◽  
pp. 420-424 ◽  
Author(s):  
Cui Hong Jiang ◽  
Jia Jun Deng ◽  
Ji Wei Hu ◽  
Xian Fei Huang ◽  
Cun Xiong Li ◽  
...  
Keyword(s):  
Drinking Water ◽  
Principal Components ◽  
Organic Phosphorus ◽  
Inorganic Phosphorus ◽  
Phosphorus Release ◽  
Distribution Characteristics ◽  
Phosphorus Speciation ◽  
Environmental Features ◽  
Release Potential ◽  
Karstic Environment

This paper reports a study on distribution characteristics of phosphorus and its species in 20 sediments samples from Lakes Baihua and Aha, based on the technique of sequential extraction. Baihua and Aha, two man-made reservoirs, are key drinking-water sources. The results, compatible with local geophysical characteristics, indicate that in sediments from both lakes, the concentrations of inorganic phosphorus (IP) were higher than those of organic phosphorus (OP), and the IP consisted mainly of calcium-bound phosphorus (Ca-P), which may temporarily control phosphorus release. Moreover, the concentrations of total phosphorus (TP) in both lakes sediments were high, thus phosphorus release potential and bioavailability were highly significant. Further statistical analyses revealed significant correlations with two extractable principal components allowing interpretation of possible origins of phosphorus loadings. Furthermore, available remediation measures were briefly evaluated for both lakes in consideration of their distinctive environmental features.

A novel separation method of the valuable components for activated clay production wastewater

2021 ◽  
Vol 19 (1) ◽  
pp. 530-540
Author(s):  
Lvshan Zhou ◽  
Tongjiang Peng ◽  
Hongjuan Sun ◽  
Dong Fu ◽  
Chuan Lai
Keyword(s):  
Aluminum Phosphate ◽  
Iron Phosphate ◽  
Acid Sites ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Precipitation Process ◽  
Iron Aluminum ◽  
Phosphorus Iron ◽  
Optimized Conditions ◽  
Acidic Wastewater

Abstract The acidic wastewater produced by the wet production of activated clay contains valuable components such as iron and aluminum. The precipitation method was successfully introduced to separate iron and aluminum from the activated clay production wastewater step by step, which can not only recover the valuable components, but also avoid environmental pollution. In the separation process, gypsum, iron aluminum phosphate, alumina, and sodium sulfate were prepared, and the phase compositions of separation products were analyzed by XRD and IR. The main influencing factors in the separation of iron and aluminum components were studied by single factor experiment. The results show that at the optimized conditions, phosphorus/iron molar ratio 6.0, the system pH 3.0, the reaction temperature 343 K, and the reaction time 90 min, the iron(iii) ion in the system can form a sodium-containing aluminum iron phosphate double salt, and the filtrate after separating Fe3+ and part of Al3+ can meet the requirements for forming high-purity Al2O3. During the phosphate precipitation process, the hypothesis should be correct that Al3+ reacts with PO 4 3 − {\text{PO}}_{4}^{3-} to form an AlPO4 skeleton, Fe3+ isomorphically replaces Al3+ in the [AlO4] tetrahedron, and adsorption occurs simultaneously, with Na+ occupying the terminal acid sites, P(Al)–OH.

Separation of Aluminum Phosphate from Iron Phosphate in Soils

Science ◽  
1962 ◽  
Vol 136 (3514) ◽  
pp. 386-386 ◽  
Author(s):  
S. C. Chang ◽  
F. H. Liaw
Keyword(s):  
Aluminum Phosphate ◽  
Iron Phosphate

Release Kinetics of Phosphorus in Sediments from Baihua Lake

2012 ◽  
Vol 599 ◽  
pp. 91-95 ◽  
Author(s):  
Jin Mei ◽  
Ji Wei Hu ◽  
Xian Fei Huang ◽  
Li Ya Fu ◽  
Jin Luo ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Release Kinetics ◽  
Phosphorus Release ◽  
Release Kinetic ◽  
Iron Aluminum ◽  
P Content ◽  
Elovich Equation ◽  
Release Data ◽  
The Relationship ◽  
Kinetics Of

Release kinetics of phosphorus in 17 sediments samples collected from Baihua Lake were determined, and the relationship between the phosphorus release kinetic parameters and the sediment composition was also investigated. The results showed that both the Elovich equation and power function equation were valid models for describing the phosphorus release data in the 17 sediments. Within the beginning 12 h, the rate of phosphorus release was high, and then decreased. Our correlation analysis demonstrates that there were no significant correlations between the maximum capacity of phosphorus release (Qmax) and the content of total nitrogen (TN), organic matter (OM), calcium-bound phosphorus (Ca-P), and organic phosphorus (OP). But the correlation between Qmax and iron/aluminum-bound phosphorus (Fe/Al-P) content was positive (R2 = 0.6064, P < 0.01), suggesting that Fe/Al-P might be the main contributor to the released phosphorus in the sediments.

Phosphorus forms and enzymatic hydrolyzability of organic phosphorus in soils after 30 years of organic and conventional farming

2012 ◽  
Vol 175 (3) ◽  
pp. 385-393 ◽  
Author(s):  
Martina Keller ◽  
Astrid Oberson ◽  
Kathrin E. Annaheim ◽  
Federica Tamburini ◽  
Paul Mäder ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Conventional Farming ◽  
Phosphorus Forms ◽  
Organic And Conventional Farming

scholarly journals Phosphate regime of sod-podzolic soil in natural and agrophytocenoses

2021 ◽  
pp. 92-115
Author(s):  
M. T. Vasbieva ◽  
N. E. Zavyalova
Keyword(s):  
Podzolic Soil ◽  
Fractional Composition ◽  
Calcium Phosphates ◽  
Arable Land ◽  
Soil Layer ◽  
Total Content ◽  
Available Phosphorus ◽  
Iron Phosphates ◽  
Phosphorus Forms

The phosphate regime of sod-podzolic soil (heavy loam) of Cis-Urals under natural phytocenoses (mixed forest, cereal-grass meadow) and agrophytocenoses was studied. The influence of agricultural use of arable land on phosphate regime was evaluated in the long-term stationary experiment (year of establishment – 1978) and the eastern galega (Galega orientalis L.) (year of sowing – 1988). The total content of phosphorus in soil, quantity of its organic, mineral and plant available forms were studied, the fractional composition of mineral phosphates was considered (using Ginzburg-Lebedeva method). The total content of phosphorus in the upper soil layer in all studied objects varied from 1 030 to 1 350 mg/kg. Mineral phosphorus forms prevailed over organic ones in the soil. It was found that the fractional composition of mineral phosphates was 40–62% represented by iron phosphates and 31–48% by calcium phosphates, which is due to the characteristic features of the soil-forming rock – yellow-brown non-carbonate silt drape. Aluminum phosphates amounted to 8–12%. Long-term cultivation of crops during five cycles of the eight-field crop rotation led to a significant decrease in the content of organic phosphorus in the soil. The lower content of iron phosphates (1.6–1.8 times) and the higher content (1.3–2.0 times) of calcium phosphates, available for plants, were observed in the soil of long-term experiment when compared with natural phytocenoses. The content of plant available phosphorus in soil gradually decreased from 239 to 164 mg/kg from the moment of experiment establishment to the fifth rotation. Prolonged fertilizer application (N60P60K60) resulted in the significant increase in mineral and plant available phosphorus forms content in the soil. The residual phosphorus of fertilizers was noted in the Fe-P, Ca-PI and Ca-PII fractions. Under the eastern galega the quantitative and qualitative indicators of the phosphate regime of the soil did not differ significantly from their natural analogues.

scholarly journals Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment

2021 ◽  
Vol 83 (8) ◽  
pp. 1824-1833
Author(s):  
Yunfeng Xu ◽  
Fanglu Hu ◽  
Xin Wang ◽  
Yangwei Qu ◽  
Lu Xu ◽  
...  
Keyword(s):  
Metal Ions ◽  
Extracellular Polymeric Substances ◽  
Ethylenediaminetetraacetic Acid ◽  
Organic Phosphorus ◽  
Electrochemical Treatment ◽  
Phosphorus Release ◽  
Dissolved Phosphorus ◽  
Sludge Flocs ◽  
Edta Treatment ◽  
Reactive Phosphorus

Abstract In this paper, combined with the addition of ethylenediaminetetraacetic acid (EDTA), the electrochemical treatment of waste activated sludge (WAS) was investigated to explore its effect on the release of phosphorus (P) from WAS. The results showed that during the electrochemical treatment, the addition of EDTA could significantly promote the release of P from the WAS to the supernatant, the optimal amount of EDTA was 0.4 g/g total suspended solids (TSS), when the release of total dissolved phosphorus (TDP), organic phosphorus (OP) and molybdate reactive phosphorus (PO43−-P) were 187.30, 173.84 and 13.46 mg/L, respectively. OP was the most likely form of P to be released during this process. Moreover, combined electrochemical-EDTA treatment could promote the release of P and metal ions from extracellular polymeric substances (EPSs) to the supernatant, and increase the solubility and disintegration of sludge. EDTA chelated the metal ions of sludge flocs and phosphate precipitates to cause sludge floc decomposition, thereby promoting the release of P from WAS.

Spatiotemporal differences in phosphorus release potential of bloom-forming cyanobacteria in Lake Taihu

2021 ◽  
Vol 271 ◽  
pp. 116294
Author(s):  
Mengmeng Wang ◽  
Huifen Zhang ◽  
Caili Du ◽  
Wei Zhang ◽  
Jianing Shen ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Phosphorus Release ◽  
Release Potential
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