01893nas a2200241 4500008004100000022001400041245008600055210006900141260008900210300001200299490000700311520104800318653001601366653001901382653001501401653002301416653001401439100002101453700002001474700002301494700002301517856011101540 2008 eng d a0971-457X00aRapid extraction and separation of indium(III) with a high molecular weight amine0 aRapid extraction and separation of indiumIII with a high molecul aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcMAY a291-2970 v153 a

The liquid-liquid extraction of indium(III) from sodium succinate media using n-octylaniline in toluene as an extractant was studied. Quantitative extraction of indium(III) was observed in the range of 0.004-0.0075 M sodium succinate at pH 3.8-6.0 with 4% n-octylaniline in toluene. Indium(III) was completely stripped from the metal loaded organic phase of the extractant with water and determined complexometrically. The stoichiometry of the extracted species was determined on the basis of;slope analysis. The extraction was found to proceed by a ion-pair mechanism with the extracted species being [RNH3+In(succinate)(2)(-)](org). Separation of indium(III) was carried out from some associated metals like Tl(I), Mg(II), Ni(II), Cu(II), Zn(II),. Cd(II), Hg(II), Pb(II), GC(IV), Sb(III), Bi(III). The selectivity of the extraction of indium(III) can also be achieved by use of a suitable masking agent for estimation and determination from the synthetic mixture corresponding to alloy to show the practical utility of the extractant.

10aIndium(III)10an-octylaniline10aSeparation10asolvent extraction10asuccinate1 aShilmkar, T., N.1 aKolekar, S., S.1 aWadgaonkar, P., P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/rapid-extraction-and-separation-indiumiii-high-molecular-weight-amine-002178nas a2200229 4500008004100000022001400041245013100055210006900186260008800255300001200343490000700355520127800362653001001640653002901650653002001679653002301699653001801722100002501740700002801765700002301793856013201816 2008 eng d a0352-513900aRapid liquid-liquid extraction of thallium(III) from succinate media with 2-octylaminopyirdine in chloroform as the extractant0 aRapid liquidliquid extraction of thalliumIII from succinate medi aKARNEGIJEVA 4, PO BOX 462, YU-11001 BELGRADE, YUGOSLAVIAbSERBIAN CHEMICAL SOCcJAN a435-4510 v733 a

A simple solvent extraction study of thallium(III) was conducted. Selective and quantitative extraction of thallium(III) by 2-octylaminopyridine (2-OAP) in chloroform occurred from aqueous sodium succinate medium (0.0075 M) at pH 3.0. Thallium(III) was back extracted with acetate buffer (pH 4.63). The effect of the concentration of succinate and 2-OAP, the role of various diluents, stripping agents, loading capacity of 2-OAP, equilibrium time and aqueous:organic volume ratio on the extraction of thallium(III) was studied. The stoichiometry of the extracted species was determined based on the slope analysis method and found to be 1: 2: 1 (metal: acid: extractant). The temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions Delta H, Delta G and Delta S for the extraction reaction. The method is free from interference of a large number of cations and anions. The method was used for the selective extraction of thallium(III) from its binary mixture with Zn(II), Cd(II), Hg(II), Bi(ill), Pb(II), Se(IV), Te(IV), Sb(III), Ga(III), In(III), AI(III), TI(I) and Fe(III). The proposed method was applied to the synthetic mixtures and alloys. It is simple, selective, rapid and eco-friendly.

10a2-OAP10aliquid-liquid extraction10asuccinate media10aTemperature effect10athallium(III)1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/rapid-liquid-liquid-extraction-thalliumiii-succinate-media-2-octylaminopyirdine-chloroform-001999nas a2200241 4500008004100000022001400041245010500055210006900160260011200229300001200341490000600353520108000359653001001439653002301449653001601472653002901488653002101517100002501538700002001563700002301583700002301606856012801629 2009 eng d a1735-207X00aSolvent extraction of trivalent indium from succinate solution by 2-octylaminopyridine in chloroform0 aSolvent extraction of trivalent indium from succinate solution b aNO 7, MARAGHEH ST, OSTAD NEJATOLLAHI AVE, PO BOX 15875-1169, TEHRAN, 00000, IRANbIRANIAN CHEMICAL SOCcMAR a200-2120 v63 a

Extraction processes of indium(III) with 2-octylaminopyridine (2-OAP) from media of various complexing ability, succinate and salicylate, in chloroform have been elucidated. The ion-pair complex has also quantitative extraction in xylene and 1,2-dichloroethane. Indium(III) from organic phase was stripped with 1.0 M hydrochloric acid and determined complexometrically with EDTA. The stoichiometry of the extracted species was found out on the basis of slope analysis. The extraction of indium(III) proceeds by an anion exchange mechanism and the extracted species is [RR'NH(2)(+)In(succinate)(2)(-)]((org)). Temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions (Delta H, Delta G and Delta S) for extraction reaction. It is possible to separate indium(III) from Zn(II), Cd(II), Pb(II), Hg(II), Bi(III), Tl(I), Tl(III), Ga(III), Al(III), Te(IV), Se(IV), Sb(III), Fe(III) and Sn(IV). The method is simple, rapid and reproducible and can be used to determine the indium from samples like alloys.

10a2-OAP10aBinary separations10aIndium(III)10aliquid-liquid extraction10aSodium succinate1 aMahamuni, Sandip, V.1 aKolekar, S., S.1 aWadgaonkar, P., P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/solvent-extraction-trivalent-indium-succinate-solution-2-octylaminopyridine-chloroform-002237nas a2200217 4500008004100000022001400041245013900055210006900194260007000263300001400333490000700347520137400354653001001728653001701738653002901755653003701784100002501821700002801846700002301874856012201897 2010 eng d a0352-513900aLiquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore0 aLiquidliquid extraction and recovery of galliumIII from acid med aKARNEGIJEVA 4, 11 120 BELGRADE, SERBIAbSERBIAN CHEMICAL SOCcApr a1099-11130 v753 a

The liquid liquid extraction of gallium(III) from hydrochloric acid solution using 2-octylaminopyridine (2-OAP) in chloroform was investigated. The extraction of gallium(III) from 6.0-9.0 mol dm(-3) hydrochloric acid was found to be quantitative using 0.033 mol dm-3 2-OAP in chloroform. The effect of the reagent concentration and other parameters on the extraction of gallium(111) was also studied. The stoichiometry of the extracted species of gallium(In) was determined based on the slope analysis method. The extraction reaction proceeded via the anion exchange mechanism from hydrochloric acid and the extracted species was [RR'NH(2)(+)GaCl(4)(-)](org). The extraction of gallium(III) was performed in the presence of various ions to ascertain the tolerance limit to individual ions. The temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (Delta H, Delta S and Delta G) for the extraction reaction. Gallium(III) was successfully separated from commonly associated metal ions, such as Zn(II), Pb(II), Cd(II), Hg(II), Bi(III), Al(III), Se(IV), Sb(III), Sn(IV), In(III), TI(I) and TI(III). However, gallium(III) was separated from Fe(III) from weak organic acid media. The procedure was also extended to the determination of gallium(III) in bauxite ore by the standard addition method.

10a2-OAP10agallium(III)10aliquid-liquid extraction10arecovery of gallium from bauxite1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/liquid-liquid-extraction-and-recovery-galliumiii-acid-media-2-octylaminopyridine-002615nas a2200301 4500008004100000022001400041245014800055210006900203260000800272300001400280490000800294520158400302653002101886653001501907653002501922653001101947653001901958100002501977700002702002700002302029700002202052700002602074700002402100700002302124700001702147700002402164856012502188 2022 eng d a0306-731900aAdsorption of toxic Pb(II) on activated carbon derived from agriculture waste (Mahogany fruit shell): isotherm, kinetic and thermodynamic study0 aAdsorption of toxic PbII on activated carbon derived from agricu cDEC a8270-82860 v1023 a

An adsorbent, mahogany fruit shell activated carbon(MFSAC), was derived from environmental friendly raw material, i.e. agriculture waste and explored for bench scale adsorption of toxic Pb(II). A facile MFSAC material was synthesised using a chemical activation method using concentrated sulphuric acid as an impregnating (activating) reagent. So derived adsorbent material was characterised by FTIR, XRD, BET, SEM, EDAX, TGA and XPS techniques to know the properties and plausible adsorption mechanism. Bench scale adsorption of toxic Pb(II) and maximum adsorption capacity of MFSAC were exhibited through batch adsorption experiments. The effect of physico-chemical parameters such as pH (1-7), MFSAC amount (0.5-5.0 g L-1), Pb(II) concentration (200-1000 mgL(-1)), contact period (60-600 min) and orbital shaking speed (60-200 rpm) was studied for maximum removal of Pb(II) upto 99.70 +/- 0.17%. The experimental data follow the Langmuir adsorption isotherm with a maximum monolayer adsorption capacity 322.28 mg g(-1)and pseudo-second-order kinetic uptake rate. The thermodynamic and temperature study revealed that the adsorption process was spontaneous and endothermic in nature (Delta H-o = 43.37 kJ mole(-1), Delta S-o = 158.02 J mol(-1)K(-1)). Most importantly, the MFSAC adsorbent was successfully regenerated and reused with conspicuous performance up to five consecutive cycles. The bench-scale adsorption with simple synthesis route, good stability and remarkable regeneration capability makes the MFSAC as an encouraging adsorbent for wastewater treatment.

10aactivated carbon10aAdsorption10amahogany fruit shell10aPb(II)10asulphuric acid1 aPatil, Suryakant, A.1 aSuryawanshi, Umesh, P.1 aHarale, Namdev, S.1 aPatil, Sandip, K.1 aVadiyar, Madgonda, M.1 aLuwang, Meitram, N.1 aAnuse, Mansing, A.1 aKim, Jin, H.1 aKolekar, Sanjay, S. uhttps://library.ncl.res.in/content/adsorption-toxic-pbii-activated-carbon-derived-agriculture-waste-mahogany-fruit-shell