Preparation of ultra-high magnetic responsive nanocluster microspheres and wastewater treatment method
A nano-cluster and responsive technology, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the requirements for magnetic recovery equipment are too high and the magnetic recovery performance cannot meet industrialization Requirements for water treatment, weak magnetic response, etc., to achieve the effect of good crystal structure and particle uniformity, large industrial application value, and ultra-high magnetic response ability
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Embodiment 1
[0031] Such as figure 1 The shown invention provides a method for preparing ultrahigh magnetic responsiveness nanocluster microspheres, the specific preparation steps include:
[0032] Step 1, add BmL ethanol and Cg cetyltrimethylammonium chloride in the ferric nitrate solution of 1mmol / L in AmL concentration, for example, add 5mL ethanol in the ferric nitrate solution of 1mmol / L in 10mL concentration and 0.2 g cetyltrimethylammonium chloride (CTAC);
[0033] Step 2, ultrasonically disperse the mixed solution obtained in step 1 for 8-12 minutes;
[0034] Step 3, adding ethylene oxide dropwise to the ultrasonically dispersed solution, stirring until a black gel is formed, and then vacuum-drying the black gel for 7-9 hours to obtain a dry gel;
[0035] Step 4, then calcining the xerogel under the condition of 220-320° C. for 2.5-4.5 hours in an oxygen barrier to obtain magnetic nano-iron oxide cluster microspheres.
[0036] As a further limitation of the preparation method, i...
Embodiment 2
[0053] Add 0.25 g of the prepared ultra-high magnetic responsive nanocluster microspheres to 100 ml of NaH with pH=3.0-12.0 and an initial concentration of arsenic of 100 mg / L 2 AsO 3 In the solution, maintain the temperature at 30°C and react for 90 minutes under the shaking condition of 175rpm. The removal rate of As(III) in the solution is higher than 99.76%, and the residual concentration is lower than 0.24mg / L, which meets the national upper limit of 0.5mg / L in wastewater. The emission standard of arsenic content in L.
Embodiment 3
[0055]Add 0.50 g of the prepared ultra-high magnetic responsive nanocluster microspheres to 100 ml of NaH with pH=3.0-12.0 and initial concentration of both As(V) and As(III) of 100 mg / L 2 AsO 4 with NaH 2 AsO 3 In the mixed solution, maintain the temperature at 30°C, and react for 90 minutes under the shaking condition of 175rpm. The removal rate of arsenic in the solution is higher than 99.83%, and the residual concentration is lower than 0.17mg / L, which meets the national waste water upper limit of 0.5mg / L. Arsenic emission standards.
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