The role of sodium alginate in the flotation separation of apatite and dolomite

Zhong, Chunhui; Feng, Bo; Zhang, Wenpu; Zhang, Liangzhu; Guo, Yanan; Wang, Tao; Wang, Huihui

doi:10.1016/j.powtec.2020.07.007

Cited by 79 publications

(19 citation statements)

References 22 publications

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“…The XPS technique was introduced to analyze the components of interfacial discharge products. As fitted in Figure S7, the carbon-containing groups, such as − C O 2 –, C–O, and C O, originate from the sodium alginate binder . F mainly exists in the form of C–F covalent bonds (689.0 eV) in pristine CF x cathodes, accompanied by few ionic C–F bonds (at about 685.9 eV) .…”

Section: Resultsmentioning

confidence: 99%

“…As fitted in Figure S7, the carbon-containing groups, such as −CO 2 −, C− O, and CO, originate from the sodium alginate binder. 46 -F mainly exists in the form of C−F covalent bonds (689.0 eV) 47 in pristine CF x cathodes, accompanied by few ionic C−F bonds (at about 685.9 eV). 48 As presented in Figure 6a,b, in O 1s spectra, two peaks centered at 533.0 and 531.3 eV are related to the existence of C−O and CO species, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Xiao

Jian³

et al. 2021

ACS Appl. Mater. Interfaces

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Elevating the discharge voltage plateau is regarded as the most effective strategy to improve the energy density of Li||CF x batteries in consideration of the finite capacity of CF x (x ∼ 1) cathodes. Here, an electrolyte, with LiBF4 in 1,3-dimethyl-2-imidazolidinone (DMI)/1,2-dimethoxyethane (DME), is developed for the first time to substantially promote the discharge voltage of CF x without compromising the available discharge capacity. DME possesses the property of low viscosity, while DMI functions to increase the voltage plateau during discharge owing to its moderate nucleophilicity and donor number, which decreases the energy barrier for breaking C–F bonds. The optimized electrolyte exhibits a significantly high average discharge voltage of 2.69 V at a current density of 10 mA g–1, which is 11.6% higher than the control electrolyte (2.41 V). In addition, a high energy density of 2099 Wh kg–1 is achieved in the optimized electrolyte (vs 1905 Wh kg–1 in the control electrolyte), showing great potential for practical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Xiao

Jian³

et al. 2021

ACS Appl. Mater. Interfaces

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“…The Ca 2p, S 2p and O 1s XPS spectra and the fitting curves of fluorapatite before and after the treatment of SDBS were evaluated. The Ca 2p spectrum for pure fluorapatite contains two peaks of Ca 2p3/2 and Ca 2p1/2 at binding energy locations of 347.35 eV and 350.84 eV, respectively, as shown in Figure 6a [28]. Since the presence of SDBS affected the density of the electron atmosphere in the Ca atomic perimeter of the fluorapatite surface, the binding energy of Ca 2p shifted to 347.45 eV and 351.00 eV (shifted by 0.2 eV) when it was treated with SDBS.…”

Section: Xps Analysesmentioning

confidence: 99%

Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

et al. 2022

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Flotation is the most often employed process to achieve the selective removal of contaminants from the raw materials used in the manufacturing of phosphate fertilizer. However, sodium oleate (NaOL), as a typical collector, is ineffective because of its low collecting ability under low temperature. As a result, developing and implementing feasible alternatives is critical for the long-term output of mines. In this study, sodium dodecyl benzene sulfonate (SDBS), a low-cost and freely soluble reagent under low temperature was used to examine its collecting ability and selectivity in a fluorapatite-dolomite system by means of single and artificially mixed minerals flotation. The adsorption mechanism was evaluated with the help of XPS analyses. The flotation results demonstrate that SDBS could float both fluorapatite and dolomite, but show a higher affinity towards fluorapatite instead of dolomite. Moreover, SDBS could preferred adsorb onto fluorapatite surface when fluorapatite and dolomite coexist. SDBS is more suitable than NaOL for satisfactory recovery of fluorapatite under low temperature in terms of the higher recovery obtained. The XPS analyses results demonstrate that the adsorption of SDBS on fluorapatite surface was more intensively as opposed to that on dolomite surface and Ca active sites on fluorapatite surface are supposed to be the main location for SDBS attachment.

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“…[151] Therefore, sodium alginate is not applied alone as crosslinking agent exists, which is calcium chloride (CaCl 2 ), must be used and added to the coagulation bath. [152] That will inhibit sodium alginate leakage, preserving preponderant amounts of sodium alginate within the resultant membrane structure, and then reaching a smaller pore size with a more hydrophilic membrane surface. [153] The oil-water emulsion's separation performances have been presented and found broadly dependent on modified membrane pore structures and properties, showing approach effectiveness and readiness for modifying such membranes.…”

Section: Blending To Enhance Antifouling Propertiesmentioning

confidence: 99%

“…[64] Finally, to effectively reduce membrane fouling and pore-blockage, membrane hydrophilicity is essential for improved within dynamic water (underwater) contact angle at almost 0 s at a temperature below 10 °C. [123,152] That is called a "super hydrophilic membrane". The main challenge is: synthesis of a lowcost membrane material like PVC, polyethylene, PP, and can exhibit super hydrophilicity also, then sustainable development for high efficient membrane can begin.…”

Section: Current Status In Membrane Industry Serving Oil-water Emulsion Treatment and Future Strategy For Researchmentioning

confidence: 99%

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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found with other insoluble matter, presenting relevant problems with safe and convenient separation. The legal discharge of oil-water emulsions is a complex process. [4] Thus, environmental authorities have established stringent regulations to cope with it. [5] Depending on countries, the oil limits are concentrations below 40 ppm as in Vietnam, [6] and in other countries like Korea, the maximum is only five ppm of oil in discharge. [7] Generally, the oil phase in water has three forms, based on oil droplets, size of more than 150 micrometers is called free oil, but that size found from 50 to 150 micrometers is the dispersed oil, [8] finally, the emulsified oil less than 20 µm. There is an increasing interest in employing membrane technology for filtering smaller size oil droplets. In this review, oil-water emulsion problems are highlighted with oil-water separation techniques selection and their performance with varied oil concentration and composition of other immiscible or miscible components. [9] Membrane technology is known formerly to economically advantageous for oily wastewater (OWW) treatment compared with other conventional technologies. [9] Based on the literature, the membranebased treatment cost estimation was about 1 and 3 $ m −3 , [10] lower than for dissolved air floatation (DAF) treatment (cost was 3.65 $ m −3 ). Generally, the treatment cost depends on OWW sources, as each industry has its specific blends for oil and grease jointly with other membrane foulants. [11] For example, oil-water emulsions treatment from the fatty acid industry has a total capital cost (costs of membranes, electricity, labor, cleaning, and maintenance) of 2.65 $ m −3 , compared with the railroad industry (it was ranged from 1.03 to 1.48 $ m −3 ). These costs for the metalworking OWW using UF were 2.8 $ m −3 . In microfiltration (MF) membrane, the OWW membrane-based treatment for oil concentration of 50 ppm annual cost was estimated as 0.098 $ m −3 with a feed rate of 100 m 3 day −1 . [9] The cost of membrane-based treatment of OWW is generally varying but is lower than conventional technologies. [12] 1.1. Oil-Water Emulsions Sources, Environmental Hazard, and Discharge Limits An oil-water emulsion is either a waste stream product, or secondary product. These effluents are generated from different areas and industrial sectors like the petroleum& gas sector, food processing, shipping facilities and maritime, and many others Oily wastewater is generated by various industries in extraordinary growing volumes, such as oil refineries, petrochemicals, metallurgical, food & beverages, and dairy industries, which need oil removal for safe discharge to the environment. Lower cost of production with high oil removal and efficient performance compared to classical methods for treating oil-water emulsions attributed to the alleviation of operation. That emphasizes membrane modification to enhance wettability, hydrophilicity with the antifouling property such as membranes dealing with tiny oil emulsions to be the key parameters to im...

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The role of sodium alginate in the flotation separation of apatite and dolomite

Cited by 79 publications

References 22 publications

Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

Recent Aspects in Membrane Separation for Oil/Water Emulsion

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The role of sodium alginate in the flotation separation of apatite and dolomite

Cited by 79 publications

References 22 publications

Boosting the Energy Density of Li||CFx Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Boosting the Energy Density of Li||CFx Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

Recent Aspects in Membrane Separation for Oil/Water Emulsion

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Product

Resources

About

Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte

Boosting the Energy Density of Li||CF_x Primary Batteries Using a 1,3-Dimethyl-2-imidazolidinone-Based Electrolyte