Calcium oxalate crystallization in the presence of amino acids, proteins and carboxylic acids

Sayan P., Sargut S., Kiran B.

CRYSTAL RESEARCH AND TECHNOLOGY, cilt.44, ss.807-817, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 44
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1002/crat.200900236
  • Dergi Adı: CRYSTAL RESEARCH AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.807-817
  • Anahtar Kelimeler: calcium oxalate, amino acids, proteins, carboxylic acids, crystal morphology, CRYSTAL-GROWTH, CITRIC-ACID, MONOHYDRATE, INHIBITION, OSTEOPONTIN, NUCLEATION, DIHYDRATE
  • Marmara Üniversitesi Adresli: Evet

Özet

Reactive crystallization of calcium oxalate was investigated in the presence of amino acids, proteins and carboxylic acids at different pH and temperatures. Average particle size, filtration rates of calcium oxalate crystals obtained in the absence and presence of additives were determined. The influence of pH, temperatures and additives on crystal morphology of calcium oxalate were also investigated and discussed by SEM analysis. TG-DTA, FT/IR and XRD analysis were carried out for all investigated conditions. Average particle size of calcium oxalate was affected significantly by the additive type and concentration. Variation of crystal morphology depending on type and concentration of the additives affected the filtration characteristics. Majority of calcium oxalate crystals occurred in the form of calcium oxalate monohydrate except those in the presence of tartaric acid. TG-DTA, FT/IR and XRD analysis proved that calcium oxalate monohydrate and calcium oxalate dihydrate mixtures are formed in the presence of tartaric acid. The effect of all additives on scale formation was also investigated. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim