DISPOSAL OF WATER FILTERING DOWNLOADING FROM CALCIUM CARBONATE

Experimental Examination of Sulfur Dioxide Dry Removal from a Mixture of Gases by Calcium Oxide, Calcium Carbonate and Dolomite

This paper refers to an experiment of SO2 absorption to the three different sorbents: calcium-oxide (CaO), calcium-carbonate (CaCO3) and dolomite (CaMg(CO3)2). In the reactor under the condition of oxidation atmosphere with the mass of sorbent (sample) of 100 g with fractional composition of 500-700µm, the gas temperatur...

Sulfate in Foraminiferal Calcium Carbonate : Investigating a Potential Proxy for Sea Water Carbonate Ion Concentration

The sulfur content of planktonic and benthic foraminifera was measured in specimens recovered from deep-sea sediment cores and individuals grown in culture. A new method for measuring sulfur in foraminiferal calcium carbonate was developed, employing a high-resolution inductively coupled plasma-mass spectrometer. The sulfur measurements, expressed as sulfur-to-calcium (S/Ca) ratios in the foram...

Relative bioavailability of calcium from calcium formate, calcium citrate, and calcium carbonate.

Calcium is an essential nutrient required in substantial amounts, but many diets are deficient in calcium making supplementation necessary or desirable. The objective of this study was to compare the oral bioavailability of calcium from calcium formate, a new experimental dietary calcium supplement, to that of calcium citrate and calcium carbonate. In a four-way crossover study, either a placeb...

Comparison of Phosphate Lowering Properties of Calcium Acetate and Calcium Carbonate in Hemodialysis Patients

Hyperphosphatemia has an important role in the development of secondary hyperparathyroidism and bone disease in patients with end-stage renal disease (ESRD). The most effective method of phosphate elimination lies with phosphate binders, the agent that more commonly used, calcium carbonate, is not an ideal binding agent. In this regard, calcium acetate has been reported to have more or at least...

Bacterial Modification of Calcium Carbonate