Sodium Phosphate, Dibasic, Heptahydrate

2009 ◽  
Vol 15 (1) ◽  
pp. 29-31 ◽  
Author(s):  
Branka Kaludjerovic ◽  
Ljiljana Kljajevic ◽  
Danijela Sekulic ◽  
Jelena Stasic ◽  
Zarko Bogdanov

Carbon hollow fibers were prepared with regenerated cellulose or polysulfone hollow fibers by chemical activation using sodium phosphate dibasic followed by the carbonization process. The activation process increases the adsorption properties of fibers which is more prominent for active carbone fibers obtained from the cellulose precursor. Chemical activation with sodium phosphate dibasic produces an active carbon material with both mesopores and micropores.


2007 ◽  
Vol 336-338 ◽  
pp. 1622-1624
Author(s):  
Xu Li ◽  
De An Yang ◽  
Li Zhi Di

Calcium phosphate cement (CPC) is a kind of promising materials used in dental and orthopeadic restoration. Nowadays, CPC is of special interest due to its self-setting behavior when mixed with an aqueous liquid phase. In this study, α-tricalcium phosphate (α-TCP) and tetracalcium phosphate (TeCP) were served as the solid component of the cement, and the liquid component was consisted of sodium phosphate dibasic dedocahydrate (SPDD, Na2HPO4·12H2O), and/or citric acid. The cement’s properties as compressive strength and porosity were measured. The effects of preparing conditions, such as liquid-to-powder ratio (L/P) and liquid composition, on compressive strength of calcium phosphate were investigated. The results show that the compressive strength increases with the decreasing of pH value. There is a premium L/P in which the compressive strength gains its maxim. The compressive strength reached 21.69 MPa at the condition of L/P = 0.30mL/g and pH =5.


2020 ◽  
Vol 21 (2) ◽  
pp. 293-302
Author(s):  
Zulfiqar Ali Bhatti

This study is focusing on the comparative study of arsenite and arsenate adsorption from the water via indigenous iron ores. The Sindh and Punjab provinces of Pakistan are badly affected by Arsenic (As) toxicity as the people are consuming arsenic contaminated groundwater. The aim of this study is to investigate the effect of anions on adsorption of arsenite As(III) and arsenate As(V). Impact of pH, contact time, adsorbent dose and shaking speed on adsorption of arsenite and arsenate is studied with the two selected iron ores from Hoshi and Shikarap from Balochistan. Hoshi and Shikarap ores exhibited higher As(III) and As (V) adsorption, respectively thus selected for further removal studies. Hoshi iron ore without sodium carbonate yields higher adsorption as compared to the samples with 100 mg/L and 1000 mg/L sodium carbonate in both As(III) and As(V). Hoshi ore exhibited the highest adsorption of 85% for As (V) without sodium phosphate dibasic and 83% for As(III). Shikarap ore for As(V) adsorbs 75% without sodium phosphate dibasic and 67% adsorption for As(III) without sodium phosphate dibasic. Shikarap ore with sodium silicate at 100 mg/L adsorbs 62% As(III) and at 1000 mg/L adsorb 52% As(III). Shikarap ore As(V) adsorption decreases from 75% without sodium silicate to 70% at 100 mg/L and even lower adsorption of 65% at a higher concentration of 1000 mg/L.


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