Method for treating wastewater with extremely low rare earth concentration by using coarse-grained clay in ionic rare-earth tailings
An ionic rare earth and rare earth technology, which is applied in the direction of ion exchange water/sewage treatment, metallurgical wastewater treatment, etc., can solve the problems of large dissolution loss of extractant, difficulty in rare earth analysis, and small resin loading, and achieve low price and rare earth recovery. The effect of high efficiency and simple equipment
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Under the condition of constant temperature (T=25℃) constant volume (30mL) shaking for one hour, 0.2g coarse sand adsorbent is 0.05mg, 0.07mg, 0.1mg, 0.15mg, 0.2mg, 0.25mg, 0.3mg, 0.35mg, Adsorption isotherms at 0.4 mg mixed rare earth ions (REO meter). The adsorption isotherm is plotted as figure 2 shown. The abscissa Ce is the concentration of mixed rare earth ions in the solution (in terms of REO, the same below) at equilibrium, and the ordinate Qe is the actual saturated adsorption capacity of mixed rare earth ions on 1 g of coarse sand adsorbent at equilibrium. image 3 In Example 1, the Langmuir adsorption isotherm of coarse sand adsorbent to mixed rare earth ions (0.05~0.35mg), wherein the abscissa is the concentration Ce of mixed rare earth ions in the solution at equilibrium, and the ordinate is the concentration in the solution at equilibrium The ratio of mixed rare earth ions Ce to the actual adsorption capacity (Qe) of mixed rare earth ions on 1g coarse s...
Embodiment 2
[0032] Prepare ammonia nitrogen simulated wastewater solution with extremely low rare earth concentration, in which ammonia nitrogen NH 4-N (N meter) concentration is 30.24mg / L, rare earth concentration (REO) is 4.77mg / L; Weigh 70g coarse sand adsorbent and load it into a sand core glass chromatography column with an inner diameter of 24mm and a height of 200mm, The filling height of the adsorbent is about 160mm. Use the adding funnel to pass the prepared simulated wastewater solution into the chromatographic column equipped with the adsorbent, adjust the piston of the adding funnel to keep the liquid level in the column at about 35mm, and open the The chromatographic column piston is used to continuously receive the effluent with a 50ml graduated cylinder, and the ammonia nitrogen content and rare earth content in the effluent are analyzed by the azoarsenic III spectrophotometric method. The total volume of the contact liquid is less than 200ml, and the concentration of ammon...
Embodiment 3
[0034] Prepare a mixed rare earth solution with a rare earth ion concentration (REO) of 111.28mg / L; weigh 36.56g of coarse sand adsorbent and load it into a sand core glass chromatography column with an inner diameter of 24mm and a height of 200mm, and the adsorbent filling height is about Use the addition funnel to pass the prepared 111.28mg / L mixed rare earth solution into the chromatographic column equipped with the adsorbent, adjust the piston of the addition funnel to keep the liquid level in the column at about 75mm, open the The chromatographic column piston is used to continuously receive the effluent with a 10ml graduated cylinder, and the rare earth content in the effluent is analyzed by the azoarsenic III spectrophotometric method. When contacting the liquid, use a stopwatch to record that the time taken when the liquid volume is 10ml is 1 minute and 29 seconds; replace the adsorbent and rare earth solution with pure water, and keep the liquid level in the column at ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More