The separation of cobalt and nickel was carried out via solvent extraction using the commercial extractant bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex-272). Solvent experiments were performed on a batch scale to optimize concentration, saponification degree, equilibration time, organic-to-aqueous phase ratio (O/A), stripping conditions. High selectivity over obtained at an concentration a...

In the present study, the solvent-solvent extraction of phenazine 1-carboxylic acid (PCA) as an environmentally friendly antifouling agent from pseudomonas aeruginosa MUT3 culture was investigated. Accordingly, after screening the extraction ability of various solvents, the combined effects of operating parameters such as solvent type (ethyl acetate, dichloromethane, and n...

recently, subcritical water extraction (swe) has been well known as a green technology for extraction of bioactive compounds from plants. in this study, subcritical water extraction, ultrasound assisted extraction (uae) and shaker solvent extraction (sse) were compared for extraction of phenolic compounds from fig (ficuscarica) pulp and skin. antioxidant activity of the extracts was evaluated u...

an air–assisted liquid–liquid microextraction method for the extraction and preconcentration of trace amounts of some synthetic phenolic antioxidants in biological fluids followed by their determination by gas chromatography–flame ionization detection has been reported. in this method the target analytes are extracted into a few microliters of carbon tetrachloride (extraction solvent) from an a...

Purification of concentrated manganese sulfate solution by solvent extraction is discussed in this paper. The use bis(2-ethylhexyl) hydrogen phosphate (D2EHPA) and bis(2,4,4-trimethylpentyl)phosphinic acid (BTMPPA) was studied removal impurities from zinc electrowinning anode sludge leachates. Over 99 % iron were removed both extractants at around pH 3 two mixer-settlers operating continuous co...

efforts to increase the mass transfer coefficient, enhance the contact area, and decrease the power input of contractors have given risen to the development of the pre-dispersed solvent extraction (pdse) contactor and the devise of the new dissolved nitrogen pdse (dnpdse) contactors. the studies conducted after the design of the new contactor to determine the working conditions for its suitable...

Dewatering of fine coal is a significant industrial challenge with economic and environmental implications. Due to the lack suitable dewatering technologies, particles are often discarded waste impoundments, leading substantial loss valuable natural resources while creating problems. The hydrophobic-hydrophilic separation (HHS) process unique solution this problem. In process, recyclable solven...