International Journal of Chemical Studies
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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   Impact Factor: GIF: 0.565

International Journal of Chemical Studies

Vol. 1, Issue 2 (2013)
Influence of Some Phosphates on The Rate of Calcium Sulfate Dihydrate Crystalistion in sodium Chloride Solution


Plots of Log R against Log δ
Fig. 1: Plots of Log R against Log δ


XRD analysis of calcium sulfate dihydrate (A) in absence of all additives (B),(c) ,(d) in the presence of 10-7 M of additives 1,2,3 respectively
Fig. 2: XRD analysis of calcium sulfate dihydrate (A) in absence of all additives (B),(c) ,(d) in the presence of 10-7 M of additives 1,2,3 respectively


Effect of Add1 and Add2 and Add3 on rates of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, I = 0.15 mol dm-3, PH=3and 50 mg seed
Fig. 3: Effect of Add1 and Add2 and Add3 on rates of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, I = 0.15 mol dm-3, PH=3and 50 mg seed


Scanning electron micrographs of calcium sulfate dihydrate (A) in absence of Additives and (b,c,d) in the presence of 10-7 M additives 1,2,3 respectively
Fig. 4: Scanning electron micrographs of calcium sulfate dihydrate (A) in absence of Additives and (b,c,d) in the presence of 10-7 M additives 1,2,3 respectively


Effect of supersaturation degree (δ) on the rate of crystallization of calcium sulfate dihydrate crystals at pH=3, T= 25 ºc, I = 0.15 mol dm -3, and 50 mg seed in absence of inhibitors and in presence of additives
Fig. 5: Effect of supersaturation degree (δ) on the rate of crystallization of calcium sulfate dihydrate crystals at pH=3, T= 25 ºc, I = 0.15 mol dm -3, and 50 mg seed in absence of inhibitors and in presence of additives


Effect of pH on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, T = 25 ºc, I = 0.15 mol dm -3, and 50 mg seed in absence of inhibitors and in presence of  inhibitors
Fig. 6: Effect of pH on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, T = 25 ºc, I = 0.15 mol dm -3, and 50 mg seed in absence of inhibitors and in presence of inhibitors


Effect of ionic strength (I) on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, pH=3, T = 25 ºc and 50 mg seed in absence of inhibitors and in presence of phosphate inhibitors
Fig. 7: Effect of ionic strength (I) on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, pH=3, T = 25 ºc and 50 mg seed in absence of inhibitors and in presence of phosphate inhibitors


Effect of temperature on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, pH=3, I = 0.15 mol dm-3 and 50 mg seed in absence of inhibitors and in presence of inhibitors
Fig. 8: Effect of temperature on the rate of crystallization of calcium sulfate dihydrate crystals at δ = 1.32, pH=3, I = 0.15 mol dm-3 and 50 mg seed in absence of inhibitors and in presence of inhibitors


International Journal of Chemical Studies