Application of sulfur poisoning palladium catalyst as catalyst for removing organic pollutants in water body
A technology of organic pollutants and palladium catalysts, applied in the field of water treatment, can solve the problems of safety risks, lack of resource utilization methods, and high recycling costs
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Embodiment 1
[0115] (1) Sulfur-poisoned nano-palladium catalysts include Pd 4 S, the mass content of sulfur in the sulfur-poisoned nano-palladium catalyst is 8%;
[0116] Weigh 20 mg of dry sulfur-poisoned nano-palladium catalyst solids, add 20 mL of n-hexane for ultrasonic dispersion for 30 minutes, then add 180 mg of titanium dioxide particles as a carrier, and ultrasonically disperse for 10 minutes to ensure that the added titanium dioxide particles and sulfur-poisoned nano-palladium catalysts are mixed evenly, and then stir for 6 hours. The sulfur-poisoned nano-palladium catalyst is fully adsorbed on the surface of titanium dioxide particles. After standing for several minutes, remove the supernatant, and dry at 50° C. to obtain supported catalyst 1 (Pd loaded on a titania carrier). 4 S catalyst).
[0117] (2) Sulfur-poisoned nano-palladium catalysts include Pd 16 S 7 and Pd 4 S, where Pd 16 S 7 and Pd 4 The mass content of S is respectively 44% and 56%, and the mass content of...
Embodiment 2
[0122] In 0.1mmol / L 4-chlorophenol (4-CP) organic waste water (solvent is water), add PMS (the addition amount of PMS is 0.25mmol / L), add the boric acid buffer salt (boric acid buffering salt) that pH value is 7.4 The addition amount of salt is 5mmol / L), and the pH value is 6~7 during the control reaction, then add the supported catalyst 1 of embodiment 1 (the addition amount of supported catalyst is 0.25g / L), stir reaction 40min under normal temperature, Get the treated water body.
[0123] The supported catalyst 1 is replaced by supported catalyst 2, pure palladium catalyst or other common commercial catalysts (such as commercial tricobalt tetroxide, separate titanium dioxide substrate, carbon nanotubes, graphene oxide, 0.025g / L Co 2+ ), the rest of the steps and parameters are the same as the above operations, and the water body is processed. The removal efficiency of 4-CP in the treated water is as follows Figure 4 shown. Figure 4 It is a comparison chart of the remov...
Embodiment 3
[0125] In 0.1mmol / L 4-chlorophenol (4-CP) organic waste water, add PMS (the addition amount of PMS is 0.25mmol / L), add the boric acid buffer salt that pH value is 7.4, pH value is 4 during control reaction , then add the supported catalyst 1 of Example 1 (the addition amount of the supported catalyst 1 is 0.25g / L), and stir and react for 40min at room temperature to obtain the treated water body.
[0126] In 0.1mmol / L 4-chlorophenol (4-CP) organic waste water, add PMS (the addition amount of PMS is 0.25mmol / L), add the boric acid buffer salt that pH value is 7.4, pH value is 4 during control reaction , then add the supported catalyst 2 of Example 1 (the addition amount of the supported catalyst 2 is 0.25g / L), stir and react at room temperature for 40min, and obtain the treated water body.
[0127] In 0.1mmol / L 4-chlorophenol (4-CP) organic waste water, add PMS (the addition amount of PMS is 0.25mmol / L), add the boric acid buffer salt that pH value is 7.4, pH value is 4 during ...
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