| abstract |
The invention discloses a method for preparing ozone catalyst by using agricultural waste straw as a raw material and application thereof in wastewater treatment, and belongs to the field of waste comprehensive utilization and water treatment. The method includes the following steps: cleaning, drying and crushing agricultural waste straws, immersing in a salt solution of an activator and transition metal, conducting microwave activation, conducting acid washing and sieving. The prepared straw based ozone catalyst has high surface area and high catalytic activity. The ozone catalyst prepared by the method can catalyze ozone oxidation treatment of refractory organic wastewater or unqualified wastewater after biochemical process under normal temperature and pressure, does not need adjustment of the pH value, and has the removal rate of wastewater COD of higher than 60%. The invention improves the biodegradability of wastewater, dramatically increases the utilization rate of ozone, reaches efficient and stable catalytic performance, not only can effectively solve the problem of high value-added resource utilization of agricultural waste straws, but also reduces the preparation cost of the ozone catalyst and improve the oxidation resistance; and the invention is suitable for industrial application. |