Cs Paa Fe3o4 Va Cs Paa Cofe2o4

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    BC TIN HNH TO HT

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    Toht nano composite chitosan PAA pht Fe3O4

    NGUYN LIU

    - Oxit stt Fe3O4

    - Chitosan PAA 1%

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    Fe3O4 +

    Chitosan PAA 1%

    Khuy nhit 6070oC, 3h

    Lc, lngranhiuln

    Sy , nung

    Snphm

    NaOH 3M,

    pH = 9 -10GA 25%

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    Toht nano composite chitosan PAA pht Fe3O4

    TO DUNG DCH ST T Fe3O4

    2FeCl3.6H2O + FeCl2.4H2O + 8NaOH -> Fe3O4 + 8NaCl +22 H2O

    - To4g Fe3O4(lt). Cho 9.2g FeCl3.6H2O v 3.4g FeCl2.4H2O ha tan vo

    200mlnc .

    - Dng khuytkhuy dung dch15, to = 70 80oC. Sau iuchnh

    pH = 11 bngNaOH 3M

    - Tiptckhuy2h ti to = 80O

    C- Thu c dung dchtrasch trung ha bngncct v ethanol.

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    Toht nano composite chitosan PAA pht Fe3O4

    (CS/PAA/Fe3O4)

    TO Chitosan PAA 1%

    - Cn 2g CS ha tan vo 200ml acrylic acid (AA) 1%.

    Thu cCS - AA 1%

    - Dng khuyckhuy dd 15, to= 60 70.

    - Cn 0.2g K2S2O8 (Trng ngng AA -> PAA). Tiptckhuy dd 30, t= 80oC.

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    Toht nano composite

    chitosan PAA pht Fe3O4

    - Cho lngtvato vo dd CS/PAA 1%.

    Khuy 500 700 v/p,

    to

    = 60 70 trong 3h. Cho 1.5 ml GA 25% vo+ Chia nhlng GA 25% cho vo trong 2h u ( trnh to

    gel qu nhanh).

    + 1h cuiiuchnh pH = 9 10 bng dd NaOH 2M.- Snphm thu c trung ha bngncct v

    ethanol.

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    Toht nano composite chitosan PAA pht CoFe2O4

    (CS/PAA/CoFe2O4)

    NGUYN LIU

    - Ferit Coban

    - Chitosan PAA 1%

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    Toht nano composite chitosan PAA pht CoFe2O4

    (CS/PAA/CoFe2O4)

    TO DUNG DCH Ferit T CoFe2O4

    2FeCl3.6H2O + CoCl2.6H2O + 8NaOH -> CoFe2O4 + 8NaCl +22 H2O

    - Cho 9.2g FeCl3.6H2O (0.4 M Fe3+) v 4g CoCl2.64H2O (0.2M Co

    2+) ha

    tan vo 200mlnc .

    - Dng khuytkhuy dung dch15, to = 70 80oC. Sau iuchnh

    pH = 11 bngNaOH 3M

    - Tiptckhuy2h ti to = 80OC

    - Thu c dung dchtrasch trung ha bngncct v ethanol.

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    HNG KHO ST

    - Kho st thi gian hpph 2 kim loi Cu v Ni.

    - Kho st pH ca dd cha ion chpph .

    - Kho st nngca ion kim loihpph.

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    KHO ST THI GIAN HP PH TI CC NNG KHC NHAU

    CHUN COMPLEXON

    - LNG XC TC: 0.5g

    - TH TCH DUNG DCH ION HP PH: 50 ml

    - TH TCH HT CHUN : 5 ml- NNG DD CHUN EDTA: 0.002N

    - CHT CH TH: murexit 1%, pH=8

    - MU NHN BIT CHUN : vng -> tm ( l thuyt)

    - (thct): vng -> hng tim tm- Thi gian kho st: 30 pht, 1h, 2h, 3h, 4h, 5h.

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    T (min) 25 ppm 50 ppm 100 ppm 150 ppm

    H% qe H% qe H% qe H% qe

    30 0 0 0 0 0 0 0 0

    60 25.71429 0.642857 63.56589 3.178295 70.16949 7.016949 71.29799 10.6947

    120 42.85714 1.071429 75.96899 3.79845 84.0678 8.40678 74.40585 11.16088

    180 60 1.5 86.82171 4.341085 90.84746 9.084746 84.46069 12.6691

    240 81.42857 2.035714 93.79845 4.689922 95.9322 9.59322 88.29982 13.24497

    300 94.28571 2.357143 98.44961 4.922481 97.9661 9.79661 90.4936 13.57404

    100 2.5 100 5 98.64407 9.864407 95.79525 14.36929

    KHO ST THI GIAN HP PH TI CC NNG KHC NHAU

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    KHO ST THI GIAN HP PH TI CC NNG KHC NHAU

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    0 100 200 300 400

    qe(mg

    /g)

    Time (min)

    50 ppm 100ppm 150ppm 25 ppm

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    0

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    15

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    25

    0 50 100 150 200

    0.2g/50ml

    0.25g/50ml

    0.5g/50ml

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    0

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    20 ppm

    30 ppm

    40 ppm

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    KHO ST THI GIAN HP PH TI pH KHC NHAU

    CHUN COMPLEXON

    - LNG XC TC: 0.5g

    - TH TCH DUNG DCH ION HP PH: 50 ml

    - TH TCH HT CHUN : 5 ml- NNG DD CHUN EDTA: 0.002N

    - CHT CH TH: murexit 1%, pH=8

    - MU NHN BIT CHUN : vng -> tm ( l thuyt)

    - (thct): vng -> hng tim tm

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    KHO ST THI GIAN HP PH TI pH KHC NHAU

    - pH dkin: 3,4,5,6,7

    - LNG XC TC: 0.5g

    - TH TCH DUNG DCH ION HP PH: 50 ml

    - TH TCH HT CHUN : 5 ml- NNG DD CHUN EDTA: 0.002N

    - CHT CH TH: murexit 1%, pH=8

    - MU NHN BIT CHUN : vng -> tm ( l thuyt)

    - (thct): vng -> hng tim tm