A new layered organic-inorganic material based on λ-Zirconium phosphate (λ-ZrP) and ethylenediaminetetraacetic acid (H 4 Y) has been prepared. The thermal analyses, X-ray diffractometry and FT-IR spectrophotometry confirm the introduction of H 4 Y inside the interlayer gallery of λ-ZrP. The pristine λ-ZrP and its new polyaminocarboxylic acid functionalized derivative (λ-ZrPH 2 Y) exhibit high potential for the application in the area of hard water treatment, where their Ca 2+ uptake capacities are found to be 32.0 and 40.4 mg Ca 2+ per gram of λ-solid, respectively.

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The surface of Zn–Al-chloride LDH microcrystals (LDH = Layered Double Hydroxides) was activated by grafting a redox active catechol bearing bis-phosphonate obtained by dopamine derivatization.

The antacid effectiveness and kinetic behaviour of three aluminium hydroxide gels, synthesized at different values of pH of precipitation, have been studied with the pH-Stat technique. Results indicate that these properties improve with increasing pH of precipitation and are structure related. Drug Dev Ind Pharm Downloaded from informahealthcare.com by McMaster University on 11/18/14 For personal use only.30 2 0 1 0 FIGURE 2a: DRX o f synthesized gels. OL 4L J I I I I J 2 4 0 30 2o 213 * Hydroxicarbonate FIGURE 2b: XRD o f synthesized gel SULCAA 9. Drug Dev Ind Pharm Downloaded from informahealthcare.com by McMaster University on 11/18/14 For personal use only. Initiation ofPhase 111, min min G E L KII KIII mEq/min mEq/min SULCAA 4 0.0143 0.0288 14.5 19.0 SULCAA 7 0.0750 0.1560 5.2 7.8 SULCAA 9 0.2000 0.2940 0.6 N.