نتایج جستجو برای: extractant
تعداد نتایج: 753 فیلتر نتایج به سال:
This work studies the solvent extraction of lithium ions from alkaline aqueous solutions by chelating agent 3-benzoyl-1,1,1-trifluoroacetone (HBTA). To develop a more eco-friendly system for than currently used, various hydrophobic room-temperature ionic liquids were investigated as diluents. The influence several experimental parameters on was examined, including phase pH, nature counter-ion, ...
Introduction. Leaves of peach ( Persica vulgaris ), containing a large amount biologically active substances, including flavonoids, are considered as promising plant source for producing extraction preparations. Aim. The purpose the study: to establish influence phytotechnological parameters efficiency isolation complex substances from leaves. Materials and methods. object study was samples dri...
Ionic liquids have many favorable properties over conventional diluents in solvent extraction. They provide an environmentally benign feature, adjustable polarity and, in some cases, higher extraction performances that remain however not predictable. As it may have a major role in extraction mechanisms, we evidence the supramolecular aggregation of HDEHP/TOPO extractant molecules in the [OMim][...
Background: Organochlorinated compounds are major environmental concern due to their persistence, long-range transportability and bio-accumulation. Chlorinated paraffin (CP) mixtures, especially short-chain CPs (SCCPs), are found in environmental samples at very high levels. However, information about their levels is still insufficient, mainly in marine biota. Methods: This study aimed to optim...
Three room temperature ionic liquids (RTILs), viz. C(4)mim(+)·PF(6)(-), C(6)mim(+)·PF(6)(-) and C(8)mim(+)·PF(6)(-), were evaluated as diluents for the extraction of Am(III) by N,N,N',N'-tetraoctyl diglycolamide (TODGA). At 3 M HNO(3), the D(Am)-values by 0.01 M TODGA were found to be 102, 34 and 74 for C(4)mim(+)·PF(6)(-), C(6)mim(+)·PF(6)(-) and C(8)mim(+)·PF(6)(-), respectively. The extracti...
Abstract Extractant for estimating plant available arsenic (As) in soil has not been universally established. Moreover, to assess and monitor the complex chemical behaviour of subsequently its transfer crops, a suitable extraction protocol considering properties relation crop uptake is required. For this purpose, pot experiment was conducted evaluate suitability extractants determination extrac...
Abstract Secondary and trace elements may be limiting soil microbial functioning, albeit demand content remain largely unknown methods for their in situ detection are limited. Thus, the objective of present study was to take first step towards method development assessment ionome, that is, elemental composition communities. Chloroform (CHCl 3 ) fumigation extraction used CHCl ‐labile secondary ...
Migration of chemicals from plastic containers into drinks and liquids containing them, is supposed to be a hazardous phenomenon and results in many health problems. Sample preparation is of great importance due to trace amounts analysis of these compounds. In this research, dispersive liquid–liquid microextraction is applied for the extraction and preconcentration of the migrated compounds pri...
We report a simple flow reactor for the selective extraction of target metal ions from an aqueous solution, using passive mixers and liquid-liquid separators. The takes place in two stages. In first stage, are selectively transferred to organic phase containing extractant molecules; and, second acid solution strips regenerates (uncomplexed) molecules, thereby allowing them be recirculated throu...
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