Search

KR-20260062466-A - Activated carbon zirconium oxide cesium oxide nanocluster and its manufacturing method

KR20260062466AKR 20260062466 AKR20260062466 AKR 20260062466AKR-20260062466-A

Abstract

The present invention relates to a nanocomposite for wastewater treatment suitable for wastewater treatment, manufactured using activated carbon, zirconium chloride, and cerium chloride heptahydrate, and a method for manufacturing the same.

Inventors

  • 김혜영
  • 장흠
  • 한기석

Assignees

  • 강원대학교산학협력단

Dates

Publication Date
20260507
Application Date
20241029

Claims (12)

  1. A mixture preparation step (S10) of preparing a mixture by adding activated carbon, zirconium chloride, and cerium chloride heptahydrate to deionized water and stirring; An ultrasonic treatment product obtaining step (S20) in which sodium hydroxide is added to the mixture prepared in the above mixture preparation step (S10) and ultrasonically treated to obtain an ultrasonic treatment product; A suspension obtaining step (S30) in which the ultrasonically treated material obtained in the above ultrasonically treated material obtaining step (S20) is stirred and cooled to obtain a suspension; A centrifugation step (S40) for centrifuging the suspension obtained in the above suspension obtaining step (S30) to obtain a centrifuged product; and, A method for manufacturing a nano-composite for wastewater treatment, comprising a drying step (S50) for drying the centrifuged product washed in the centrifugation step (S40) above.
  2. In Article 1, A method for manufacturing a nano-composite for wastewater treatment, wherein the mixture in the above mixture manufacturing step (S10) is obtained by mixing the activated carbon, the zirconium chloride, and the cerium chloride heptahydrate in a weight ratio of 50:25:25, respectively, and stirring for 8 to 12 hours.
  3. In Article 1, A method for manufacturing a nano-composite for wastewater treatment, wherein the ultrasonically treated product in the step of obtaining the ultrasonically treated product (S20) is obtained by adding sodium hydroxide to the mixture prepared in the step of preparing the mixture (S10) and ultrasonically treating it for 6 to 12 minutes.
  4. In Article 1, A method for manufacturing a nano-composite for wastewater treatment, wherein the suspension in the above suspension obtaining step (S30) is obtained by stirring the ultrasonically treated material obtained in the above ultrasonically treated material obtaining step (S20) at a temperature of 50 ℃ to 70 ℃ and cooling at 5 ℃ to 25 ℃.
  5. In Article 1, A method for manufacturing a nano-composite for wastewater treatment, wherein the centrifugal product obtained in the centrifugal separation step (S40) is obtained by centrifuging the suspension obtained in the suspension obtaining step (S30) at a speed of 8000 rpm to 12000 rpm for 10 minutes to 20 minutes.
  6. In Article 1, A method for manufacturing a nano composite for wastewater treatment, wherein in the drying step (S50), the centrifuged product washed in the centrifugation step (S40) is dried at 40°C to 60°C for 16 to 32 hours.
  7. A nanocomposite for wastewater treatment obtained by adding sodium hydroxide to a mixture prepared by adding activated carbon, zirconium chloride, and cerium chloride heptahydrate to deionized water and stirring, performing ultrasonic treatment on the mixture, stirring and cooling the ultrasonically treated product, centrifuging the suspension to obtain a centrifuged product, and drying the centrifuged product.
  8. In Article 7, The above mixture is a nanocomposite for wastewater treatment obtained by mixing the above activated carbon, the above zirconium chloride, and the above cerium chloride heptahydrate in a weight ratio of 50:25:25, respectively, and stirring for 8 to 12 hours.
  9. In Article 7, The above ultrasonic treated material is a nanocomposite for wastewater treatment obtained by adding sodium hydroxide to the above mixture and ultrasonically treating for 6 to 12 minutes.
  10. In Article 7, The above suspension is a nanocomposite for wastewater treatment obtained by stirring the above ultrasonically treated material at a temperature of 50 ℃ to 70 ℃ and cooling at 5 ℃ to 25 ℃.
  11. In Article 7, The above centrifugation product is a nanocomposite for wastewater treatment obtained by centrifuging the above suspension at a speed of 8,000 rpm to 12,000 rpm for 10 to 20 minutes.
  12. In Article 7, The above centrifuged product is a nanocomposite for wastewater treatment, which is dried at 40°C to 60°C for 16 to 32 hours.

Description

Nanocomposite for wastewater treatment and method for manufacturing the same {Activated carbon zirconium oxide cesium oxide nanocluster and its manufacturing method} The present invention relates to a nanocomposite and a method for manufacturing the same, and more specifically, to a nanocomposite for wastewater treatment and a method for manufacturing the same, which is manufactured using activated carbon, zirconium chloride, and cerium chloride heptahydrate and is suitable for wastewater treatment. Methylene blue (MB) is a common phenothiazine cationic dye. Due to its strong dye adhesion and excellent stability, it is used as a redox indicator and a biological dye. The primary sources of dye contamination in aquatic environments are the printing, textile, food, clothing, and paper industries. Due to the complex aromatic structures inherent in dyes, they are very difficult to decompose in the natural environment. In aquatic ecosystems, the presence of dyes hinders light penetration, thereby interfering with photosynthesis in aquatic organisms. Furthermore, direct human contact can lead to persistent skin discoloration, while inhalation can induce symptoms such as confusion, nausea, and vomiting. At the same time, due to the widespread use and potential misuse of antibiotics in hospitals, veterinary clinics, and homes, antibiotics are being widely detected in aquatic environments, including groundwater, drinking water, and river water. Generally, antibiotics exhibit structural stability and resistance to degradation in natural environments. Long-term administration of antibiotics leads to the proliferation of drug-resistant microorganisms, which destroy ecosystems and pose a threat to human health. Tetracycline hydrochloride (TCH) is a type of tetracycline antibiotic that exhibits broad-spectrum antimicrobial properties. In particular, a significant portion of TCH remains unchanged even after biological metabolism, posing substantial health risks, particularly to liver and gastric function. Furthermore, TCH residues can strengthen the resistance of aquatic organisms and disrupt ecosystem equilibrium. Therefore, there is an urgent need to investigate feasible and efficient methods or materials for removing dyes and antibiotics from the aquatic environment. Numerous modern studies support the potential of adsorption and photocatalytic degradation technologies in wastewater treatment. Conversely, single adsorbents face challenges such as saturating adsorption capacity and reducing surface area, leading to a gradual decrease in adsorption rates. Similarly, single catalysts face issues like slow degradation rates, prolonged treatment times, and the generation of hazardous byproducts. Certain metal oxides or metal nanomaterials possess high bandgap energies, preventing them from responding sufficiently to sunlight irradiation. However, integrating adsorption and photocatalytic degradation through appropriate synthesis methodologies is considered one of the most effective ways to mitigate these limitations. In this regard, Registered Patent No. 10-2481616 (published on December 28, 2022) discloses "magnetic nanoparticle composite for wastewater treatment, method of manufacturing the same, and application the same," which relates to a magnetic nanoparticle composite comprising: a magnetic nanoparticle core; and a shell formed by coating the outer surface of the core with a leaf extract of *Cinnamomum tamala*, a sap extract of *Jatropha curcas*, or a mixture thereof. However, the magnetic nanoparticle composite according to the aforementioned conventional "magnetic nanoparticle composite for wastewater treatment, method for manufacturing the same, and application the same" has the problem that the wastewater treatment effect does not reach the desired level, so various studies on nanocomposites to improve this are being conducted. Fig. 1 is Images regarding TEM micrograph of AC- ZrO₂ / CeO₂ NC at 100 nm (a); elemental mapping (bf); and elemental spectrum (g). Figure 2 shows the FTIR spectrum (a) and XRD pattern (b) of AC- ZrO2 / CeO2 NC. The hydrodynamic size, zeta potential (c), and zero charge point (d) of AC- ZrO2 / CeO2 NC. Images regarding the adsorption/desorption isotherms (e) and pore width distribution plot (f) of AC- ZrO2 /CeO2 NC related to BET analysis. Figure 3 shows images of the effect of pH on the adsorption capacity of AC- ZrO2 / CeO2 NC for MB(a) and TCH(b) and the effect of temperature on the adsorption capacity of AC- ZrO2 / CeO2 NC for MB(c) and TCH(d) (Experimental conditions: AC- ZrO2 / CeO2 NC weight = 10 mg; MB and TCH concentrations = 50 mg/L; volume = 20 mL; reaction time = 90 min). Fig. 4 is Images of the nonlinear fitting curve of the adsorption kinetics model for MB(a) and TCH(b) absorbed by AC- ZrO2 / CeO2 NC, the nonlinear fitting curve of the adsorption isotherm model for MB(c) and TCH(d) absorbed by AC- ZrO2 / CeO2 NC, and the slope and intercept of the Van't Hoff plot associated wit