POLITECNICO DI MILANO FOR HEAVY METALS. Ph.D. Student: Arianna CATENACCI. DIIAR - Environmental Engineering Section

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1 PLITECIC DI MILA IVATIVE MATERIALS FR EAVY METALS REMVAL FRM WATER Ph.D. Student: Ph.D. Advisor: Manuela ATELLI DIIAR - Environmental Engineering Section

2 Ph.D. STUDET PLY LYAMID MIDAMIE (PAA) YDRGELS MIE (PAA) PLITECIC DI MILA LIEAR PAA PAA YDRGEL R 1 R 1 R 1 R 1 C 2 C 2 C R 2 C C 2 C 2 C 2 C 2 C R 2 C C 2 C 2 R 3 R 1 R 1 R 1 R 1 R 1 C 2 C 2 C R 2 C C 2 C 2 C 2 C 2 C R 2 C C 2 C 2 TARGET RIETED MATERIALS T VERCME TE LIMITS F TE EXISTET TECLGIES FR EAVY METALS REMVAL FRM WATER LW SELECTIVITY LW REMVAL CAPACITY LG EQUILIBRIUM TIMES P DEPEDACE

3 Ph.D. STUDET PLITECIC DI MILA AIM F TE PRJECT WATER/YDRGEL ITERACTIS stability, changes in chemical composition of water. IMPLEMETATI I WATER TREATMET PLATS regeneration, filterability, breakthrough curves. SUITABILITY FR TE REMVAL F IRGAIC PLLUTATS kinetics, maximum complexing capacity, interferences.

4 Ph.D. STUDET PLITECIC DI MILA PAA PAA TESTED SAMPLES MBA/CYS MBA/EDA

5 Ph.D. STUDET PLITECIC DI MILA WATER ATER/I /IDRGEL ITERACTIS Absorption of large amount of water leading to a VLUMETRIC EXPASI DEGRADATI over time 14 via hydrolysis 12 mgc/g PAA Release of Total rganic Carbon MBA/EDA MBA/CYS 0 5 h 1 d 3 d 7 d 15 d 25 d 30 d Contact time I EXCAGE of anions present in aqueous phase as WBA resin

6 Ph.D. STUDET PLITECIC DI MILA REMVAL F CU 2+ : KIETIC TESTS CMPLEXATI of EAVY METALS IS due to tertiary aminic, carboxyl groups and disulphide groups Batch tests at different contact time Tap water with Cu(II) (2 mg/l) T ~ 23/24 C Contact mode: mechanical mixing S/L ratio = 1/150 1/300 1/600 g/ml Analyses: p, CES, C(Cu) EQUILIBRIUM CDITIS S/L [g/ml] PARTICLE SIZE MBA/EDA [mgcu/g RESI ] MBA/CYS [mgcu/g RESI ] 1/150 1/300 1/600 1mm<d<2mm d<1mm mm<d<2mm A..A..A. d<1mm mm<d<2mm d<1mm A..A..A.

7 Ph.D. STUDET REMVAL F CU 2+ : KIETIC TESTS PLITECIC DI MILA CMPLEXIG CAPACITY AT TE EQUILIBRIUM DEPEDS S/L RATI mass of copper provided to the unit mass of hydrogel EQUILIBRIUM CDITIS S/L [g/ml] PARTICLE SIZE MBA/EDA [mgcu/g RESI ] MBA/CYS [mgcu/g RESI ] 1/150 1/300 1/600 1mm<d<2mm d<1mm mm<d<2mm A..A..A. d<1mm mm<d<2mm d<1mm A..A..A.

8 Ph.D. STUDET REMVAL F CU 2+ : KIETIC TESTS PLITECIC DI MILA RESIDUAL CCETRATI AT TE EQUILIBRIUM not influenced by S/L ratio different from zero DYAMIC EQUILIBRIUM established by C = C RESI - C WATER EQUILIBRIUM CDITIS S/L [g/ml] PARTICLE SIZE MBA/EDA [mgcu/g RESI ] MBA/CYS [mgcu/g RESI ] 1/150 1/300 1/600 1mm<d<2mm d<1mm mm<d<2mm A..A..A. d<1mm mm<d<2mm d<1mm A..A..A.

9 Ph.D. STUDET PLITECIC DI MILA REMVAL F CU 2+ : KIETIC TESTS EQUILIBRIUM TIME PARTICLE SIZE 1 mm < d < 2 mm d < 1 mm EQUILIBRIUM CDITIS S/L [g/ml] PARTICLE SIZE MBA/EDA [mgcu/g RESI ] MBA/CYS [mgcu/g RESI ] 1/150 1/300 1/600 1mm<d<2mm d<1mm mm<d<2mm A..A..A. d<1mm mm<d<2mm d<1mm A..A..A.

10 Ph.D. STUDET REMVAL F CU 2+ : KIETIC TESTS PLITECIC DI MILA DIFFUSI CEFFICIETS ITRAPARTICLE DIFFUSI FLUID - FILM DIFFUSI q t D = r r m S 2 2 q r r m q ρ S t t = k F a P ( c c ) t s D S : effective surface diffusivity [cm 2 /s] k F : fluid film mass transfer coefficient [cm/s] dc dt = K L C n K P C m K C p K SS C q ITRAPARTICLE DIFFUSI FILM DIFFUSI

11 Ph.D. STUDET REMVAL F CU 2+ : KIETIC TESTS PLITECIC DI MILA DIFFUSI CEFFICIETS dc dt C = k MAX MBA/CYS K + C C K C = K L + K P 1 mm < d < 2 mm - FILM DIFFUSI - ITRAPARTICLE DIFFUSI d < 1 mm - FILM DIFFUSI

12 Ph.D. STUDET PLITECIC DI MILA CCLUSIS AD EXT STEPS IFFUSI into Influence of liquid-film on contaminant DIFFUSI hydrogels Batch isotherm tests to quantify TE MAXIMUM CMPLEXIG CAPACITY of the hydrogels Multistep batch tests compared to RSSCT to simulate BREAKTRUG CURVES and to obtain design data

13 PLITECIC DI MILA IVATIVE MATERIALS FR EAVY METALS REMVAL FRM WATER DIIAR - Environmental Engineering Section