Movement of applied phosphorus following the mining and revegetation of mineral sands on Australia's east coast

Soil Research ◽  
1984 ◽  
Vol 22 (2) ◽  
pp. 135 ◽  
Author(s):  
AJ Diggle ◽  
LC Bell
Keyword(s):  
Adsorption Capacity ◽  
Native Species ◽  
Rock Phosphate ◽  
East Coast ◽  
Unsaturated Flow ◽  
Water Movement ◽  
Triple Superphosphate ◽  
Phosphorus Adsorption ◽  
Phosphorus Source ◽  
Quartz Grains

The magnitude of phosphorus movement through a range of mined and unmined sands on Australia's east coast was measured under saturated and unsaturated flow in laboratory columns and in a field experiment of 16 months' duration. Relationships were examined between the amounts of leaching observed and the chemical and physical characteristics of the sands and the rates (0-306 kg P/ha) and forms (KH2PO4,, triple superphosphate and rock phosphate) in which phosphorus was added. Moderate movement of phosphorus was observed in all of the sand types examined, with the greatest movement occurring in A, and stockpiled A, horizon material from a podzol profile and the least being in B horizon material from the same profile. The extent of movement was related to the phosphorus adsorption capacity of the sands, the solubility of the phosphorus source, and the amount and rate of water movement. The adsorption capacity of the sands was positively correlated with the amount of aluminium and iron oxyhydroxides on the quartz grains; the coefficients of correlation (r) between the maximum phosphorus adsorbed and the aluminium and iron extracted by H2SO4- HClO4, were 0.98 and 0.84 respectively. The relevance of the findings to ground water quality and native species regeneration are briefly discussed.

scholarly journals The Use of Rock Phosphate as a Source of Phosphorus on a slightly acid clayey Soil in Tanzania

Afrika Focus ◽  
1986 ◽  
Vol 2 (2) ◽  
Author(s):  
J.J.T. Msaky ◽  
B.M. Msanya ◽  
A.P. Uriyo
Keyword(s):  
Plant Growth ◽  
Rock Phosphate ◽  
Clayey Soil ◽  
Residual Effects ◽  
Triple Superphosphate ◽  
Nutrient Source ◽  
Extractable P ◽  
Phosphorus Source ◽  
Soluble P ◽  
Initial Results

The effectiveness of rock phosphate as a phosphorus nutrient source was studied as compared to triple superphosphate (TSP), a common fertilizer used in Tanzania. Initial results showed that rock phosphate can be used as a P source for growing maize. Its application increased both grain yields and soluble floride extractable P in the soil. TSP still proved to be superior to rock phosphate for the direct effect experiments in terms of both grain yield and soluble fluoride extractable P. However, for the residual effects experiment, rock phosphate was equally effective as TSP. Grinding rock phosphate beyond -40+60 mesh did not result in an increase in soluble P. However, increase in levels of application resulted into increased soluble P in soil. A combination of fineness and level of application resulted into an increased amount of soluble P. This combination should thus be used as a criterion in the use of rock phosphate as a P nutrient source for plant growth. KEYWORDS : Rock Phosphate, phosphorus source, soils, Tanzania 

Samples disturbance overestimates phosphorus adsorption capacity in soils under long-term application of pig slurry

2019 ◽  
Vol 65 (9) ◽  
pp. 1262-1272 ◽  
Author(s):  
Luciano Colpo Gatiboni ◽  
Djalma Eugênio Schmitt ◽  
Paulo Cezar Cassol ◽  
Jucinei José Comin ◽  
Joice Crescêncio Heidemann ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Pig Slurry ◽  
Phosphorus Adsorption

scholarly journals Gafsa rock phosphate and triple superphosphate for dry matter production and P uptake by corn

2005 ◽  
Vol 62 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Rossini Mattos Corrêa ◽  
Clístenes Williams Araújo do Nascimento ◽  
Silvana Keely de Sá Souza ◽  
Fernando José Freire ◽  
Gleibson Barbosa da Silva
Keyword(s):  
Dry Matter ◽  
Rock Phosphate ◽  
P Uptake ◽  
Production Costs ◽  
Dry Matter Production ◽  
Triple Superphosphate ◽  
Broadcast Application ◽  
Matter Production ◽  
Plant P Uptake ◽  
Corn Plants

Crops in general make poor use of phosphorous fertilizer and, as a result, recommended rates and production costs are very high. Phosphorus can be made more readily available to plants by proper management of phosphate fertilization, selecting both, type of fertilizer and application method. This study was carried out to evaluate the efficiency of the natural Gafsa rock phosphate and the triple superphosphate on dry matter production and P uptake by corn plants cultivated in a greenhouse. Fertilizers were applied localized and broadcast/incorporated on to two soils with contrasting phosphorus capacity factors (PCF). Rock phosphate broadcast application was as efficient as triple superphosphate in increasing corn plant dry matter in the Tropudult, with lower PCF. This effect was not observed on the Haplustox, owing to the lower P solubility due to the higher Ca concentration in this soil. Triple superphosphate rates increased plant P uptake in both soils and for both application forms. Rock phosphate resulted in higher P-content in plants, but only for broadcast application on the Ultisol.

scholarly journals Effect of Cow Dung, Biogas Slurry and Vermicompost on Phosphorus Adsorption Behavior of Soil

2015 ◽  
Vol 7 (3) ◽  
pp. 167-175 ◽  
Author(s):  
M. Seafatullah ◽  
M. A Hoque ◽  
M. S. Islam ◽  
M. M. Islam ◽  
M. N. Islam
Keyword(s):  
Adsorption Capacity ◽  
Soil Phosphorus ◽  
Phosphate Fertilizer ◽  
Phosphorus Release ◽  
Adsorption Behavior ◽  
Cow Dung ◽  
Biogas Slurry ◽  
Fertilizer Management ◽  
Phosphorus Fertilizer ◽  
Phosphorus Adsorption

One of the approaches for phosphorus fertilizer management is controlling the soil phosphorus adsorption behavior. To examine the effect on phosphorus adsorption behavior, three amended soil samples were prepared by mixing 10% (w/w in dry basis) cow dung, biogas slurry and vermicompost with soil. Phosphorus adsorption behavior was examined by using Langmuir, and Temkin adsorption isotherms. Initially, biogas slurry and vermicompost increased the maximum phosphorus adsorption capacity (MPAC) of soil from 461 µg g-1 (control) to 558.0357 and 586.17 µg g-1 respectively, and then decreased steadily and reached 429.92 and 398.41 µg g-1 respectively in five weeks.  Whereas in case of cow dung, MPAC was initially decreased, then reached maximum in 17 days and ultimately decreased. Thus application of cow dung along with phosphate fertilizer seems to increase the loss of the fertilizer through runoff and leaching. Conversely, biogas slurry and vermicompost prevent phosphorus loss by regulating phosphorus release through initial enhancement followed by gradual decrease in phosphorus adsorption capacity of soil. Both biogas slurry and vermicompost can be considered as good soil amendments as they have the ability to control the release of phosphorus fertilizer as per the need of the plants.

Maximum Phosphorus Adsorption Capacity Adjusted to Isotherm Models in Representative Soils of Eastern Amazon

2015 ◽  
Vol 46 (20) ◽  
pp. 2615-2627 ◽  
Author(s):  
Rafael Silva Guedes ◽  
Antonio Rodrigues Fernandes ◽  
Edna Santos de Souza ◽  
João Roberto Rosa e Silva
Keyword(s):  
Adsorption Capacity ◽  
Isotherm Models ◽  
Phosphorus Adsorption

scholarly journals Application of Cold Region Regenerable Biomass in Phosphorus Adsorption in Reclaimed Water

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1815
Author(s):  
Jinghui Wu ◽  
Xiangyu Li ◽  
Zhian Ying ◽  
Chi Wang ◽  
Wu Yang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Water Distribution ◽  
Wastewater Treatment Plants ◽  
Reclaimed Water ◽  
Chemical Precipitation ◽  
Pine Needles ◽  
Production Costs ◽  
Raw Material ◽  
Phosphorus Adsorption ◽  
Wide Ph Range

In order to enhance the using efficiency of the adsorbent and decrease production costs, reclaimed saturation Lanthanum modified pine needles (LH pine needles) have been studied as a possible solution. Pine needles gathered from the woods of Northeast China area were used as raw material for generating LH pine needles by alkali-isopropanol treatment and chemical precipitation. To explore the utilization of LH pine needles as a recycling adsorbent in wastewater treatment plants (WWTPs) and laboratory water distribution. Results show that removal effective of phosphorus (P) by LH pine needles in low concentration reclaimed water of WWTPs was 41% and up to more than 92% in its adding standard. In the wide pH range, LH pine has an effective adsorption capacity for phosphorus; pH can also interfere with the adsorption capacity of LH pine as there is a negative correlation between them. The adsorption of phosphorus by LH pine needles is divided into three stages with a pH ranging from 3~11. Ligand exchange reaction, electrostatic reaction and Lewis acid reaction are PO43− adsorption mechanism. The analysis of the recycling efficiency of LH pine needles proved that LH pine needles have good regeneration performance. After being eluted by NaOH regeneration agent for more than 10 times, the adsorption efficiency of phosphorus can still be stable at over 90% in seven cycles.

scholarly journals Dewatered alum sludge: a potential adsorbent for phosphorus removal

2006 ◽  
Vol 54 (5) ◽  
pp. 207-213 ◽  
Author(s):  
Y. Yang ◽  
D. Tomlinson ◽  
S. Kennedy ◽  
Y.Q . Zhao
Keyword(s):  
Water Treatment ◽  
Adsorption Capacity ◽  
Phosphorus Removal ◽  
Adsorption Process ◽  
Study Groups ◽  
Phosphorus Adsorption ◽  
Langmuir Adsorption ◽  
Adsorption Capacities ◽  
Alum Sludge ◽  
Best Fit

Alum sludge refers to the by-product from the processing of drinking water in water treatment works. In this study, groups of batch experiments were designed to identify the characteristics of dewatered alum sludge for phosphorus adsorption. Air-dried alum sludge (moisture content 10.2%), which was collected from a water treatment works in Dublin, was subjected to artificial P-rich wastewater adsorption tests using KH2PO4 as a model P source. Adsorption behaviours were investigated as a function of amount and particle size of alum sludge, pH of solution and adsorption time. The results have shown that pH plays a major role not only in the adsorption process but also in the adsorption capacity. With regard to adsorption capacity, this study reveals the Langmuir adsorption isotherm being the best fit with experimental data (R2=0.98–0.99). The maximum adsorption capacities range from 0.7 to 3.5 mg-P/g when the pH of the synthetic P solution was varied from 9.0 to 4.3, accordingly. The outcome of this study indicated that alum sludge is suitable for use as an adsorbent for removal of phosphate from wastewater.

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