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Wang, L., Zhang, X., Xue, N., Li, Z., Zhu, Y., & Nie, Y. (2024). Colloids and Surfaces A: Physicochemical and Engineering Aspects, 136044.
Tara gum (TG), a natural polysaccharide, has been explored as a selective inhibitor for the flotation separation of apatite and dolomite, two minerals with similar physical and chemical properties. This study investigates the suppressive effects of TG on these minerals when using sodium oleate (NaOL) as the collector in flotation processes. Experimental results indicate that TG effectively inhibits dolomite flotation while having minimal impact on apatite flotation within a pH range of 9.5 to 11.0.
Zeta potential and contact angle measurements reveal that TG selectively adsorbs on dolomite surfaces, significantly affecting its floatability, while having little effect on apatite. X-ray photoelectron spectroscopy (XPS) analyses confirm that TG adsorbs weakly on apatite through physical means, while exhibiting strong chemical adsorption on dolomite. Molecular dynamics (MD) simulations further support these findings, showing that TG interacts more strongly with dolomite, with higher relative concentration and closer adsorption distances compared to apatite.
Flotation tests with artificial mixed mineral samples resulted in a concentrate with 76.76% recovery and 39.27% grade of P2O5. The results suggest that TG is a promising selective inhibitor for efficiently separating apatite from dolomite in flotation processes. This approach offers an environmentally friendly and effective method for the clean utilization of phosphate resources.
Luo, Tian, Zihao Wei, and Changhu Xue. Carbohydrate Polymers 348 (2025): 122937.
Tara gum (TG) was utilized in the construction of stable water-in-water (W/W) emulsions, addressing the limitations of instability in previously reported systems. In this study, TG was combined with amylopectin (AMP), and ovalbumin (OVA) particles, with varying shapes, were employed as stabilizers to enhance emulsion stability. The results revealed that heating treatment altered the conformation of OVA particles, transforming them into either fibrous (OVAF) or spherical (OVAS) forms, which showed distinct stabilization effects on TG/AMP emulsions.
The emulsions exhibited optimal stability at pH 4 and 3% OVA concentration. OVAF-stabilized emulsions (OF-TE) demonstrated better ionic and physical stability compared to OVAS-stabilized emulsions (OS-TE), due to the denser interfacial layer formed by OVAF, which facilitated stronger adsorption at the water-water interface. Rheological analysis indicated minimal effects on the viscosity of the emulsions from both OVAF and OVAS.
The study highlighted that OVAF significantly improved the stability of TG/AMP emulsions, preventing phase separation for up to 5 days. This work underscores the potential of Tara gum in food-grade W/W emulsions, offering significant advancements in the development of stable emulsions for various applications, including the food and pharmaceutical industries.
Eze, F. N., Ovatlarnporn, C., Jayeoye, T. J., Nalinbenjapun, S., & Sripetthong, S. (2022). International Journal of Biological Macromolecules, 206, 521-533.
This study presents a one-pot green method for the development of a biocompatible Tara gum-Riceberry phenolics-silver nanogel hybrid composite (TG/RiPE-SNG), designed to harness a variety of biological potentials. The reaction system utilizes AgNO3 as the precursor for silver nanoparticles, Riceberry phenolic extract as a green in situ reductant, and Tara gum as a stabilizing and anchoring agent.
Preparation of Tara Gum/Riceberry Phenolics-Silver Nanogel (TG/RiPE-SNG)
To prepare the nanogel, a 0.5% (w/v) aqueous solution of Tara gum (TG) was made by dissolving the appropriate amount of powder in distilled water while stirring at 50 °C. The solution was stirred for 2 hours and kept overnight at 4 °C to ensure complete dissolution of any residual particulate matter. Next, a mixture containing 0.25 mg/mL Riceberry phenolic extract (RiPE) and 0.1% (w/v) Tara gum was prepared, and the pH was adjusted to 7.4 using 0.05 M NaOH. While stirring, silver nitrate solution was added to achieve concentrations of 0, 1, 2, and 4 mM. The formation of silver nanoparticles (SNPs) within the composite was monitored both visually and by UV-Vis spectroscopy.
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