Enhanced Phosphorus Release from Phosphate Rock Activated with Lignite by Mechanical Microcrystallization: Effects of Several Typical Grinding Parameters

Zhang, Xian-Mei; Li, Yi; Hu, Cheng; He, Zhenquan; Wen, Ming-xing; Gai, Guo Sheng; Huang, Zhaohui; Yang, Yuxiang; Hao, Xiangyang; Li, Xiaoyan

doi:10.3390/su11041068

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…6H), the phosphate ore powder particles were fine and rounded into a loose flocculent shape with blurred surface boundaries and disappearing angles. This shows that mechanical activation can promote more full contact between the active mineral and phosphate ore powder, which is conducive to improving the activation effect of the active mineral on phosphate ore powder (Zhang et al, 2019).…”

Section: Surface Morphological Changesmentioning

confidence: 86%

“…Scanning electron microscope (SEM) analysis (Fig. 1) showed that the unactivated phosphate ore powder was mainly in the form of lumps of different sizes and irregular shapes, with dense structure, prominent angles, relatively good crystallinity, extremely easy to break, and good mechanical activation properties (Zhang et al, 2019;Laonapakul et al, 2021).…”

Section: Tested Phosphate Orementioning

confidence: 99%

“…The effective phosphorus content increased from 1.19% to 8.27% within 60 min of grinding time, and the effective phosphorus content increased at the fastest rate in the first 5 min. At 20 min of mechanical activation, the particle size of phosphate ore powder increased slightly, and the effective phosphorus content still increased, which was because the small particles formed by the crushing of large particles in turn adhered to the large particles, resulting in small fluctuations in the particle size of the phosphate ore powder, but then disappeared with the subsequent grinding (Zhang et al, 2019). At the same time, the increase of effective phosphorus content in phosphorite powder indicates that the effect of mechanical activation on the reactivity of phosphate ore powder depends not only on the reduction of particle size but also on the change of its internal crystal structure (Chaikina and Aman, 2005;Yaneva et al, 2005).…”

Section: Particle Sizes Of Phosphate Ore Powder and Effective Phosphorusmentioning

confidence: 99%

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Study on phosphorus release from medium- and low-grade phosphate ore powders by mechanical activation and low molecular weight organic acid activation

Fan,

Ma,

Wang

et al. 2024

Physicochem. Probl. Miner. Process.

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Phosphate ore is an essential resource for producing phosphate fertilizer. International phosphate ore is overmined, and phosphorus resources are becoming depleted; improving the utilization efficiency of medium- and low-grade phosphate ore powder (PR) through activation is the key to the sustainable and efficient use of phosphorus resources. However, the traditional activation method is inefficient and has some limitations on the grade of phosphate ore. In this study, a combination of mechanical activation and low molecular weight organic acid activation was used to activate medium- and low-grade phosphate ore powders, and the activation effects of different mechanical activation conditions, such as mechanical grinding time, the addition of different types and proportions of active minerals (zeolite, bentonite, and kaolin), and different types of low molecular weight organic acids (oxalic acid, tartaric acid, malic acid, and citric acid), on phosphate ore powder were compared. The results show that mechanical activation had a synergistic effect with low molecular weight organic acid activation. Mechanical activation can reduce the particle size of phosphate ore powder and increase the release of effective phosphorus from phosphate ore powder. Mechanical activation for 60 min reduced phosphate ore powder's median diameter (D50) from 41.67 μm to 10.59 μm and increased the effective phosphorus leaching rate from 1.19% to 8.27%. The phosphorus release effect of low molecular weight organic acids was oxalic acid > tartaric acid > malic acid > citric acid, with the optimal concentrations of 0.1 mol/L, 0.3 mol/L, 0.5 mol/L, 0.2 mol/L, and the optimal activation cultivation times were all 6 days. This study optimizes the activation method of phosphorite powder, which can not only alleviate the current global shortage of phosphorite resources but also reduce environmental pollution while maximizing the use of phosphorite resources.

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Section: Surface Morphological Changesmentioning

confidence: 86%

Section: Tested Phosphate Orementioning

confidence: 99%

Section: Particle Sizes Of Phosphate Ore Powder and Effective Phosphorusmentioning

confidence: 99%

See 1 more Smart Citation

Study on phosphorus release from medium- and low-grade phosphate ore powders by mechanical activation and low molecular weight organic acid activation

Fan,

Ma,

Wang

et al. 2024

Physicochem. Probl. Miner. Process.

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“…Another study reported improvements in the activation properties of PR with different lignite (as an activator) ratios (1%, 2%, 3%, and 5%) during the grinding process, to prepare for the microcrystallized PR. The dry matter of rapeseed and the soil-available P increased by 56.1% and 89.6%, respectively, with the direct use of PR and micro-crystallized PR in an aqui-cinnamon soil (pH 8.2), compared with the control test without the addition of phosphate minerals [18]. We proved that this was a feasible solution, with a 10-20% substitution of MAPR for P fertilizer on spring maize in the Northeast China for nearly neutral soil (pH 6.47).…”

Section: Introductionmentioning

confidence: 92%

The Improved Phosphorus Solubility of Mechanochemically Activated Phosphate Rock and Its Effect on Soil-Available Phosphorus in Weakly Acidic Soil

et al. 2022

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Mechanochemical treatment is an effective and ecological way to treat medium and low-grade phosphate rock (PR) for fertilizer. To explore the phosphorus (P) solubility mechanisms of mechanochemically activated phosphate rock (MAPR) and its P supply capacity, we investigated the chemical properties and infrared spectroscopy (IR) characteristics of different types of MAPR and soil-available P using the chemical extraction method (2% citric acid), IR analysis and soil incubation experiment in this study. The results showed that the P solubility of magmatic, metamorphic and sedimentary types of MAPR increased by 7.76–13.67, 0.6–1.64 and 0.91–2.68 times, respectively, compared with the initial PR. The IR analysis demonstrated that the isomorphous substitution (B-type of CO32− for PO43− and OH− for F−) occurred in the apatite and β-Ca(PO3)2 was generated with better P solubility. The dynamic changes in soil-available P (Bray and Kurtz method) treated by MAPR significantly increased by 3.81–6.57-, 2.49–5.4- and 4.98–8.39-fold, respectively, within 100 days in red soil (pH 5.94), compared with the initial PR. In conclusion, the significant increase in P solubility of MAPR and soil-available P in weakly acidic soil was due to the improved reactivity of MAPR during the process of mechanochemical activation.

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“…In this context, numerous co-application techniques have been proposed in the literature, such as the addition of biomasses [22][23][24][25], microorganisms [26][27][28], and inorganic substances to agricultural soils [29][30][31][32]. However, many of the proposed solutions are complex and expensive, limiting their practical application at the field level.…”

Section: Introductionmentioning

confidence: 99%

A Circular Economy Model to Improve Phosphate Rock Fertiliser Using Agro-Food By-Products

Piscitelli

Bennani

Chami³

et al. 2022

Sustainability

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Phosphorus (P) is an essential nutrient for the plant life cycle. The agricultural management of phosphorus is complicated by the inefficient use of phosphorus by plants, consequent environmental losses, and the rapid consumption of slowly renewed phosphate rock (PR). These issues represent a huge environmental burden and jeopardise food production. In this study, we proposed the combination of this fertiliser with food-processing by-products such as olive pomace, barley spent grain, and citrus pomace to increase phosphate rock solubility and the efficient use of P. Phosphate rock, by-products, and mixtures of phosphate rock and by-products were placed into litterbags and buried in sand. Periodically, one replicate per treatment was collected for the destructive measurement of total and water-soluble phosphorus. In parallel, pH, organic matter, and ash content were measured to investigate the mechanisms behind changes in P content. The mixtures’ P-release values ranged between 80% and 88%, whereas phosphate rock lost 23% of its P over 30 days. Phosphate rock showed a constant water-soluble P fraction at the four sampling times, whereas the mixtures exhibited a highly water-soluble P fraction that tended to decrease over time. Specifically, citrus pomace led to the significant and rapid release of phosphorus, barley spent grain maintained the highest water-soluble fraction over 30 days, and olive pomace was not the best-performing product but still performed better than pure phosphate rock. Moreover, the increased solubility of phosphate rock in mixtures was significantly (p < 0.001) ascribed to the reduction in pH. The results of this experiment are promising for in vivo trials and suggest the possibility of simple and easily achievable solutions for more sustainable production systems and effective P-fertilisation strategies. Proposing such easily applicable and inexpensive solutions can reduce the distance between research achievements and field applications.

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Enhanced Phosphorus Release from Phosphate Rock Activated with Lignite by Mechanical Microcrystallization: Effects of Several Typical Grinding Parameters

Cited by 6 publications

References 13 publications

Study on phosphorus release from medium- and low-grade phosphate ore powders by mechanical activation and low molecular weight organic acid activation

Study on phosphorus release from medium- and low-grade phosphate ore powders by mechanical activation and low molecular weight organic acid activation

The Improved Phosphorus Solubility of Mechanochemically Activated Phosphate Rock and Its Effect on Soil-Available Phosphorus in Weakly Acidic Soil

A Circular Economy Model to Improve Phosphate Rock Fertiliser Using Agro-Food By-Products

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