Demonstrates an effective method to remove calcium and magnesium ions in hard water using a modified polymer, indicating potential for water treatment applications.
SUMMARY: Chlorosulfonated polystyrene-DVB (10%) copolymer (in beads form, 720 ‐ 840lm) 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.
No takes yet. Share an insight, caveat, or question.
Biçak et al. (1998) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: