“Umbrella” Structure Trisiloxane Surfactant: Synthesis and Application for Reverse Flotation of Phosphorite Ore in Phosphate Fertilizer Production

Abstract

Phosphorite is generally used in the manufacture of phosphate fertilizer and plays a vital role in the development of agricultural and food production. Nonetheless, how to obtain phosphorite concentrates efficiently and sustainably has become an urgent problem. In this study, a newly designed trisiloxane surfactant, N-(2-Aminoethyl)-3-aminopropyltrisiloxane (AATS), has been prepared and utilized as an emerging collector for reverse flotation of phosphorite ore. Its collecting ability was compared with the conventional surfactant 1-dodecamine (DDA). In the collector concentration tests, AATS with lower concentrations showed stronger collecting ability for quartz. In the pH tests, AATS always performed better than DDA in the acidic or alkaline condition. In bench-scale flotation experiments, the P 2 O 5 recovery of phosphorite concentrates with 150 g/t AATS was 10.77% higher than that with 300 g/t DDA, which proved that AATS can be applied to the sustainable production of phosphorite concentrates. For a 4000 t/ d phosphorite ore processing plant, the profit could be increased 7,014,702.07 USD every year by using AATS as the collector. Therefore, this work provides a promising approach to enhance the production efficiency of phosphate fertilizer and to promote the sustainable development of agriculture.

Synergistic Catalysis of SnO2-CNTs Composite for VO2+/VO2+ and V2+/V3+ Redox Reactions

“…Furthermore, environmental pollution and energy shortages are becoming exacerbated (Cheng C. et al, 2020 ; Chuanchang et al, 2020 ; Huang et al, 2020a ; Yang et al, 2020 ). Therefore, new energy development technologies have received widespread attention (Huang et al, 2020b ; Wang D. et al, 2020 ; Liu et al, 2021 ; Nie et al, 2021 ). However, new resources, such as solar and tidal energies, cannot provide a continuous source of energy.…”

Reduction in Surface Tension of Water Due to Pranic Healing

“…Lower surface tension of medicines such as nasal drops, ophthalmic medicines help them spread on the target surface, crossing mucous -layer that normally exists over these surfaces (27) . Using the surfactants along with fertilizers is in practice to reduce the ST of water (4) .…”

“…The lower ST also increases the CO 2 vapour concentration in water in plants (3) . The fact that lower ST improves the absorption of nutrients by plants has led to the use of surfactants from the middle of the 20th century (4) . The water's surface tension may also be reduced by mechanical methods like misting, used in fog-ponics to improve the irrigation efficiency (5) .…”

Synergistic Catalysis of SnO2/Reduced Graphene Oxide for VO2+/VO2+ and V2+/V3+ Redox Reactions

“…With the development of industrial processes, energy consumption is increasing day by day. However, energy consumption brings environmental pollution [ 1 , 2 , 3 , 4 ]. In order to solve this problem and achieve “carbon neutrality”, humankind began to explore renewable energy [ 5 , 6 , 7 , 8 , 9 ].…”