plant biomass harvested after heavy-metal phytoremediation must be considered as a hazardous waste that should be contained or treated appropriately before disposal or reuse. this study provides an evaluation of extractants for the removal of lead from abutilon theophrastus biomass. the research was carried out a leaching study to determine the lead-extraction efficiency of the different leacha...

a new simple and reliable method for rapid and selective extraction and determination of trace levels of zn(ii) ion is developed. zn(ii) ions are adsorbed quantitatively during passage of aqueous samples through pet-aa/aam nano fiber modified. almost all matrix elements were found to pass through the nano fiber to drain. modified poly (ethylene terephthalate)-grafted-acrylic acid/acryl amide na...

In any manufacturing firm, cutting tool selection for a metal removing operation plays a pivotal role. For various operations, different set of cutter tools made of different materials or specification are used. Through this paper, it is aimed at automated extraction of the data of these cutting tools for various metal cutting operations using elements of the Natural Language Processing. We dis...

We report a liquid-liquid extraction system based on perfluorocarbon (fluorous-solvent extraction) that allows selective extraction of metal ions from aqueous and organic phases to a perfluorocarbon phase (FC-72) with perfluorinated beta-diketone (1,1,1,5,5,6,6,6-octafluoro-2,4-hexanedione), which can be followed by backward extraction using 1 M nitric acid.

a hydrmetallurgical study based on the extraction of zn and pb from a nigerian sphalerite mineral leached with 4 m hydrochloric acid has been undertaken. triphenylphosphite (tpp) has proved to be very effective for the extraction of zinc. with 2 m tpp and at ambient temperature of 25±2°c; 35.71% and 66.7% of pb and zn were extracted, respectively, into the organic phase within 60 min. the recov...

phosphoryl containing ligand tri-n-octylphosphine oxide (topo) in dichloromethane has been used as an extracting agent for tetravalent thorium and trivalent europium ions from their 1 m sodium nitrates. the equilibrium data reveal that both ions are extracted as the complexes at 1:3 metal/ligand ratio. the values of conditional extraction equilibrium constant (kex) show the superior extractive ...

Nuclear matrices, associated with over 80% of the chromosomal DNA, could be isolated from BHK nuclei by extraction with 2M-NaCl. The matrices were found to impose at least two levels of structural order upon nuclear DNA. From sedimentation studies it was inferred that metal depletion of the salt-extracted nuclei generated matrix structures, which sedimented at significantly lower rates than con...

The purified and thermo stable myrosinase from cauliflower seedlings was immobilized by 3.5% agar agar matrix and immobilized myrosinase chips were stored in extraction buffer. After 48 hours 30% enzyme activity was exuded into extraction media from immobilized enzyme chips. Effect of some metal ions and organic solvents on the activity of immobilized cauliflower myrosinase was studied. Amongst...

The solvent extraction of neodymium, a rare earth metal, was studied with a continuous stirred vessel. One of the widely used extractants, 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A), diluted with kerosene was selected as an extracting organic solvent. First, the extraction equilibrium of neodymium between aqueous and organic phases was measured in a batch-wise experimental ru...