A method for wet catalytic oxidation treatment of glyphosate wastewater
A wet catalytic oxidation and glyphosate technology, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, natural water treatment, etc., can solve problems such as no discovery, and achieve the effect of good wet catalytic oxidation activity and stability
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Embodiment 1
[0085] In this example, the glyphosate content in the glyphosate wastewater reaches 2285 mg / L, which is much higher than the glyphosate concentration in the general glyphosate film thin solution. This example mainly illustrates that waste water with high glyphosate concentration can also be treated by the present invention to degrade glyphosate.
[0086] Coal-based columnar activated carbon (CTC90, φ4) was taken, washed with deionized water, dried at 150°C, crushed and sieved into 16-20 mesh particles for later use. Take 20 g of the above-mentioned granular activated carbon and place it in a tube furnace. Under the atmosphere of ammonia and nitrogen, the temperature is programmed to rise to 950 °C and kept for 2 h, and finally the temperature is naturally cooled to room temperature. That is, the first-stage wet catalytic oxidation catalyst of the glyphosate thin liquid film is prepared.
[0087] The evaluation of the catalyst was carried out in a fixed-bed bubbling reactor, w...
Embodiment 2
[0089] In this embodiment, the glyphosate wastewater is the same as in Embodiment 1, except that the activated carbon catalyst of the one-stage catalytic oxidation adopted is modified by ammonia water.
[0090] Coal-based columnar activated carbon (CTC90, φ4) was taken, washed with deionized water, dried at 150°C, crushed and sieved into 16-20 mesh particles for later use. Take 20 g of the above-mentioned granular activated carbon and place it in a tube furnace. Under the atmosphere of ammonia gas bubbling ammonia water and nitrogen gas, the temperature is programmed to rise to 950 °C and kept for 2 h, and finally the temperature is naturally cooled to room temperature. That is, the first-stage wet catalytic oxidation catalyst of the glyphosate thin liquid film is prepared.
[0091] Catalyst consumption and processing condition in the evaluation process of catalyst are the same as embodiment 1, and glyphosate concentration is reduced to 220mg / L equally in the waste water after...
Embodiment 3
[0093] The glyphosate wastewater in this example is the general glyphosate film thin liquid wastewater, in which the concentration of glyphosate is 272 mg / L, the concentration of orthophosphate is 1.6 mg / L, and the concentration of total phosphorus is 80.2 mg / L.
[0094]Coal-based columnar activated carbon (CTC90, φ4) was taken, washed with deionized water, dried at 150°C, crushed and sieved into 16-20 mesh particles for later use. Using melamine as a nitrogen-containing precursor to carry out nitrogen modification on the above-mentioned granular activated carbon, the specific process is to dissolve 3 g of melamine in water at 70 ° C, add 20 g of the above-mentioned granular activated carbon for rotary impregnation for 3 hours, filter and then dry at 120 ° C. The dried granular activated carbon was placed in a tube furnace, under the atmosphere of ammonia and nitrogen, the temperature was programmed to 850 °C and kept for 2 h, and finally the temperature was naturally cooled to...
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Abstract
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