Ambe rlite IRC 718 Study on the Separation of Platium Elements by Ambe rlite IRC 7 18 Che lating Res in 200 1 2
Ambe rlite IRC 718 Study on the Separation of Platium Elements by Ambe rlite IRC 7 18 Che lating Res in 200 1 2.
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Abstract. 1. 3 1. 3 2. 3 3. 5 4. 6. 9 1. 9 2. 9. 11 1. ph 11 2. 14 3. 16 4. 18 5. Pt(IV),Au(III) Pd(II) 20 6. 22. 25. 26
Au(III), Pt(IV) Pd(II) Amberlite IRC- 718. 1.0M HCl 1M HCl 0.3M Thiourea.
Abs tra c t The s e pa ration method of Au(III), Pt(IV) a nd Pd(II) we re studied by a che lating res in, Ambe rlite IRC 7 18. The s e pa ration of thos e e le me nts was carried out with 1M HCl and 0.3M thiourea in 1M HCl the mixed solution of HCl and thiourea as eluents.
.,., (complexing res in) (s e lective res in),.,.. (crown compound) (Crypta nds, Crown Ether ) 1. - 1-
Amberlite IRC- 718 Au(III), Pt(IV) Pd(II) ( ), ph.,. - 2 -
1-10 1. Ta lio Urey, 1938 Zeolite 100 Li K. O. Sa muelson.,. 1942 Oak Ridge, 1944 Spedding gr. gr.. 1960. 2. - 3-
. (stationa ry phase), (mobile phase).. (paper chromatography), (thin layer plate chromatography).,, - capilla ry chromatography, 1mm. tubler chromatography. 10 10. (high performance chromatography)., -. (s ize exclus ion chromatogra rhy).,. - 4-
3.. Talior Urey, 1938 Zeolite 100 Li + K +.. - SO3 - - COOH, - NH3 + - N(CH3) +. R - H + R + Cl -. R H Cl.. R - H + + Na + R - Na + + H +. R + Cl - + NO3 - R + NO3 - + Cl - - 5-
,... (diffus ion theory). film diffus ion pa rticle diffus ion, Boyd 0.003M film. 4..,, ph. Amberlite IRC- 718 - - N(CH2COOH)2.. ph. Table 1. - 6-
Table 1. Typical phys ical properties of Amberlite IRC-718 res in. Appea ra nce Hydrated, opaque beads Shipping Weight 421 bs. / ft 3 ( Na form ) Scree n Grading (wet) Moisture Content 16 to 50 mes h ( U.S. Standa rd Screen ) 62 to 68 % ( Na form) Swelling 40% H Na Cation excha nge ca pacity 1.1 meq/ml wet res in - 7-
Amberlite IRC- 718,. ph, EDTA background compos ition. Table 2. Ta ble 2. Suggested ope rating conditions for Ambe rlite IRC- 7 18. ph (minium ph depe nds on application ) 1.5 to 14.0 Maximum Te mpe rature 190 O F ( 90 o C ) ( Na ) 160 o F ( 70 o C ) ( H ) Se rvice Flow Rate Rege ne ration 1.0 to 4.0 gpm / ft 3 ( 8.0 to 32.0 BV / hr ) 5 to 15% HCl or H2SO4 0.25 to 0.50 gpm / ft. ( 2.0 to 4.0 BV /hr ) Ne utra lization ( if necessa ry ) 1 to 3 % Sodium hydroxide or ammonium hydroxide 0.25 to 0.50 gpm / ft. 3 ( 2.0 to 4.0 BV /hr. ) - 8-
1. J unsei,. 1.1meq/mL wet res in Amberlite IRC- 718, Au(III),Pt(IV), Pd(II) Jobin Yvon JV 24, ph meter NOVA- 310. 2.. : Amberlite IRC- 718 24., 2.5 cm 30 cm, 1.0 M HCl HCl 8cm. - 9-
: 105 Amberlite IRC-718 1.0 g 100 ml 1000ppm 1.0 ml, ph 1 3 ph 3 6 ph 50mL 24. :, 1.0 ml/min. 25 50mL (ICP). - 10-
1. p H ph ph 1-6 Fig. 1. Fig. 1, ph. ph (- CH3COOH). Fig.1 ph 4., Au(III), Pt(IV) Pd(II) ph ph 95%. ph 1.0 Au(III), Pt(IV) Pd(II)., ph 1.0-5.0 Batch Table 3. Table 3 ph 1.0 Pt(IV),Au(III) Pd(II). - 11-
Table 3. Meta l sorption capacity va lues ( mmol g - 1 ) of different meta l ions in va rious buffer solutions ph Pt(IV) Au(III) Pd(II) Ti(IV) Fe(III) Cu(II) Pb(II) 1.0 0.34 0.69 0.55 - - 0.022 0.0048 2.0 0.32 0.69 0.50 0.35-0.25 0.048 3.0 0.31 0.65 0.50 0.31 0.18 0.26 0.068 4.0 0.28 0.68 0.49 0.29 0.29 0.29 0.074 5.0 0.26 0.65 0.49 0.25 0.32 0.32 0.086-13-
2... Table 4 Au(III) 10 60%, 20., ph 1.0 Cu(II) Pb(II).. - 14-
Ta ble 4. Effect of s ha king time on the sorption ca pacities of the Amberlite IRC 718 res in. Sha king Time ( min ) Sorption Percent ( % ) Au(III) Pt(IV) Pd(II) Cu(II) Pb(II) 0 0 0 0 0 0 5 38 31 25 2 0 10 65 60 48 3 1 20 87 85 78 5 3 40 95 98 96 5 3 60 95 98 99 7 5 Res in ta ken : 1g, matrix : ph 1.0 Co nce ntratio n of Meta l io n : 1.0mg/50mL - 15-
3.. Amberlite IRC- 718 Pt(IV), Au(III) Pd(II). Table 5 (Amberlite IRC- 7 18) Pt(IV), Au(III) Pd(II) 0.1M, 0.25M, 0.5M 1.0M Batch %. Table 5 Thiourea Pt(IV), Au(III) Pd(II) 100%. ph 1.0 Pt(IV), Au(III) Pd(II) Thiourea. NH4NO3, KSCN. - 16-
Ta ble 5. Desorption perce nt of Pt(IV), Au(III) a nd Pd(II) on Ambe rlite IRC- 7 18 Chelating res in. D e s o r p t i o n Solution NH4NO3 Sulfosa licylic acid KSCN Sodium Sulfide Ma lonic Acid Thiourea Res in take n : 0.2g, Concentration of desorption solution Desorption pe rce nt (%) Au(III) Pt (IV) Pd (II) 0.1 M 0 0 0 0.25 M 5 2 0 0.5 M 8 4 1 1.0 M 12 6 2 0.1 M 7 23 23 0.25 M 15 29 18 0.5 M 20 30 0 1.0 M 30 33 0 0.1 M 0 precipitation precipitation 0.25 M 2 - - 0.5 M 6 - - 1.0 M 10-0.1 M 90 47 38 0.25 M 100 34 30 0.5 M 100 28 36 1.0 M 100 22 48 0.1 M 0 2 0 0.25 M 0 5 0 0.5 M 3 5 0 1.0 M 5 7 1 0.1 M 97 100 100 0.25 M 100 100 100 0.5 M 100 100 100 1.0 M 100 100 100 Conce ntration of meta l ions : 1.0mg/50mL - 17-
4. %. Amberlite IRC- 7 18 Pt(IV), Au(III) Pd(II). Table 6 (Amberlite IRC- 718) Pt(IV), Au(III) Pd(II) 0.1M, 0.25M, 0.5M 1.0M Batch. Table 6 HCl Pt(IV), Au(III) Pd(II), HNO3 H2SO4 Pt(IV), Au(III) Pd(II). thiourea %. - 18-
Ta ble 6. Desorption perce nt of Pt(IV), Au(III) a nd Pd(II) on Ambe rlite IRC- 7 18 Chelating res in. D e s o r p t i o n Solution Concentration Desorption pe rce nt (%) Au(III) Pt (IV) Pd (II) 0.1 M 45 10 0 H2SO4 0.25 M 65 15 2 0.5 M 80 20 8 1.0 M 88 38 10 0.1 M 60 8 0 HNO3 0.25 M 80 12 0 0.5 M 90 20 1 1.0 M 90 38 7 0.1 M 0 0 0 HCl 0.25 M 0 0 0 0.5 M 0 0 0 1.0 M 0 0 0 Res in ta ke n : 0.2g, Conce ntration of meta l ions : 1.0mg/50mL - 19-
5. Pt(IV), Au(III) Pd (II). Amberlite IRC- 718 Pt(IV), Au(III) Pd(II) 0.1mg 1L 10cm 0.3M thiourea 20-30mL.(Table 7) Amberlite IRC- 7 18 Pt(IV), Au(III) Pd(II) 40-60. - 20-
Table 7. Preconcentration factors for Au(III), Pt(IV) and Pd(II). Metal ion Volume ( ml ) Conce ntration ( ppm ) ph Desorption Solution Recovery (%) preconcentration factor * Au (III) 1000 0.1 0.61 0.3M Thiourea 98 1.5 60 Pt (IV ) 1000 0.1 0.5 0.3M Thiourea 97 2.1 47 P d (II) 1000 0.1 0.8 0.3M Thiourea 95 3.7 40 * One lite r sample solutions conta ining 0.1 mg meta l ion we re loaded on the column a nd e luted with 20mL of 0.3M Thiourea Column : 3.14 X 0.5cm 2 X 10cm. - 21-
6... 1mL/min.. Fig.2 25mL 2.5mg Au(III) 5.0mg Fe(III) Cu(II), 1M HCl 0.25M thiourea+1.0m HCl., Au(III)., Fig.3, 1M HCl 0.3M thiourea + 0.1M HCl., Au(III), Pt(IV) Pd(II). - 22-
Amberlite IRC- 718. 1. 20. 2. thiourea HCl, thiourea. 3. Amberlite IRC- 7 18. - 25-
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