Water purification compositions of magnesium oxide and applications thereof
A composition, technology of magnesium oxide, applied to water pollutants, water/sewage treatment, chemical instruments and methods, etc.
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Embodiment 1-3
[0051] Examples 1-3. Preparation of particles including PMMA binder
[0052] Example compositions 1-3 were prepared using the amounts and ratios described in Table 1 below. Polymethyl methacrylate (PMMA) is completely dissolved in xylene to generate a viscous medium by heating the solution at a temperature of about 60°C to about 65°C. For the fixed MgO weight, various binder ratios ranging from 10% by weight to 20% by weight are used to assess the optimal binder ratio. The MgO is blended with the PMMA / xylene solution to form a paste. The paste was dried at about 175°C to about 180°C under ambient pressure for about 45 minutes to remove xylene from the MgO / PMMA slurry. This produces an uneven flake-like structure. The resulting flakes of various sizes are converted into coarse powder by mechanical grinding using a standard mixer to produce a granular structure medium having an average diameter of about 0.4 mm to about 0.8 mm. The particle composition is further combined with ...
Embodiment 4-9
[0055] Example 4-9. Preparation of particles including calcium aluminum silicate binder.
[0056] In certain embodiments including a calcium aluminum silicate binder, the water purification composition of the present invention is prepared by mixing the magnesium oxide component with the calcium aluminum silicate binder.
[0057] In one such embodiment, the magnesium oxide component contains from about 20% to about 30% by weight MgO, from about 60% to about 70% by weight Fe 2 O 3 , About 8 wt% to about 10 wt% CaCO 3 . In other embodiments, the magnesium oxide component further contains about 1% to about 2% by weight MgAl 2 O 4 .
[0058] By blending 20g MgO, 70g Fe 2 O 3 And 10 grams of CaCO 3 , Example composition 4 was prepared. An additional 3 grams of calcium aluminum silicate was added to the mixture. The entire composition was loaded into a granulation drum and water was added at approximately 5 minute intervals to make a uniform slurry. After the desired uniformity is obtai...
Embodiment 10
[0064] Example 10. Analysis of the flow rate of contaminated water and the removal efficiency of As and F of the composition 1-9 of the example
[0065] The analysis of the contaminated water flow rate and the removal efficiency of arsenic and fluorine of Example Compositions 1-9 was performed as follows.
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