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Surface modification of macroporous glycidyl methacrylate based copolymers for selective sorption of heavy metals

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Abstract

Two samples of macroporous poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), poly(GMA-co-EGDMA), were synthesized by suspension copolymerization and modified with amines. Initial poly(GMA-co-EGDMA), and the samples modified with ethylene diamine [poly(GMA-co-EGDMA)-en], diethylene triamine [poly(GMA-co-EGDMA)-deta] and triethylene tetramine [poly(GMA-co-EGDMA)-teta], were characterized by mercury porosimetry, FTIR spectroscopy and elemental analysis. The most pronounced increase of specific surface area (75%) was observed for poly(GMA-co-EGDMA)-teta sample with smaller particles (D < 150 μm). The Cu(II) sorption was rapid, depending on porosity of amino-functionalized samples and ligand type. For poly(GMA-co-EGDMA)-deta and poly(GMA-co-EGDMA)-teta sorption half time required to reach 50% of total sorption capacity, t 1/2, were around 3 min.

Sorption capacities for Cu(II), Co(II), Cd(II) and Ni(II) as well as for Cr(VI), Co(II), Cd(II) and Ni(II) ions were determined under competitive conditions as a function of pH, ligand type and porosity at room temperature. The results indicate selectivity of poly(GMA-co-EGDMA)-deta for Cu(II) over Cd(II) of 3:1 and for Cu(II) over Ni(II) and Co(II) of 6:1. The decrease in particle size of poly(GMA-co-EGDMA)-teta caused the increase of sorption capacities for all metal ions. At pH 1.8 the selectivity of poly(GMA-co-EGDMA)-teta with smaller particles for Cr(VI) over Ni(II), Co(II) and Cd(II) ions was 8.5:1.

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Abbreviations

AIBN:

2,2′-azobisisobutyronitrile

C 0 :

Concentration of the metal ions in the initial solution (mmolml−1)

C :

Concentration of the metal ions in the aqueous phase at time t (mmolml−1)

D :

Particle diameter (μm)

d :

Pore diameter (nm)

d m :

Mean pore diameter (nm)

d mi :

Mean incremental pore diameter (nm)

di :

Incremental pore diameter (nm)

d V/2 :

Pore diameter that corresponds to half of the pore volume (nm)

DETA:

Diethylene triamine

EGDMA:

Ethylene glycol dimethacrylate

EDA:

Ethylene diamine

GMA:

Glycidyl methacrylate

L :

Depth of the cylindrical pore (m)

m :

Amount of copolymer used in metal sorption experiments (g)

Poly(GMA-co-EGDMA):

Copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate

Poly(GMA-co-EGDMA)-en:

Copolymer with attached ethylene diamine

Poly(GMA-co-EGDMA)-deta:

Copolymer with attached diethylene triamine

Poly(GMA-co-EGDMA)-teta:

Copolymer with attached triethylene tetramine

S :

Total pore surface area (m2 g−1)

S i :

Specific surface area (m2 g−1)

S Hg :

Specific surface area (m2 g−1)

ΔS i :

Incremental specific volume (m2 g−1)

t 1/2 :

Sorption half time (min)

TETA:

Triethylene tetramine

V :

Volume of the aqueous phase in metal sorption experiments (ml)

V S :

Specific pore volume (cm3 g−1)

V tot :

Total pore volume (cm3 g−1)

Q :

Metal sorption capacity (mmolg−1)

Q max :

Maximum metal sorption capacity (mmolg−1)

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Acknowledgement

This work was supported by the Serbian Ministry of Science and Environmental Protection, Project ON 142039.

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Authors and Affiliations

  1. Faculty of Forestry, Kneza Višeslava 1, Belgrade, 11030, Serbia

    Ljiljana Malović

  2. Polymer Department, ICTM, Center for Chemistry, Studentski trg 12-16, Belgrade, 11001, Serbia

    Aleksandra Nastasović & Dragana Đorđević

  3. Chemistry Department, Faculty of Science, Mladena Stojanovića 2, Banja Luka, 78000, Bosnia and Herzegovina

    Zvjezdana Sandić

  4. Vinča Institute of Nuclear Sciences, P.O. Box 522, Belgrade, Serbia

    Jelena Marković

  5. ICTM—Center for Catalysis and Chemical Enginering, Njegoševa 12, Belgrade, Serbia

    Zorica Vuković

Authors
  1. Ljiljana Malović
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  2. Aleksandra Nastasović
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  3. Zvjezdana Sandić
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  4. Jelena Marković
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  5. Dragana Đorđević
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  6. Zorica Vuković
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Correspondence to Aleksandra Nastasović.

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Malović, L., Nastasović, A., Sandić, Z. et al. Surface modification of macroporous glycidyl methacrylate based copolymers for selective sorption of heavy metals. J Mater Sci 42, 3326–3337 (2007). https://doi.org/10.1007/s10853-006-0958-y

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  • DOI: https://doi.org/10.1007/s10853-006-0958-y

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