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Crosslinked poly(styrenesulfonamide) with iminoacetic acid chelating groups for hard‐water treatment
Author(s) -
Biçak Niyazi,
Şenkal Bahire Filiz,
Yarbaş Tuǧrul
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981201)199:12<2731::aid-macp2731>3.0.co;2-u
Subject(s) - triethylenetetramine , chemistry , chelation , polymer chemistry , copolymer , chloroacetic acid , magnesium , nuclear chemistry , acrylic acid , leaching (pedology) , potassium , polymer , organic chemistry , environmental science , soil water , soil science
Chlorosulfonated polystyrene‐DVB (10%) copolymer (in beads form, 720–840 μm) has been modified with triethylenetetramine (TETA) to give the corresponding polymeric sulfonamide. By treating with the potassium salt of chloroacetic acid in water, amino groups of the polymer have been carboxymethylated almost quantitatively. The resulting material with iminoacetic acid pendant groups has very efficient chelating ability for Ca(II) and Mg(II) ions in ppm levels. The chelating polymer can be regenerated ten times by acid leaching without losing its original reactivity. It is suitable for removal of calcium and magnesium ions to supply soft water.