Method for degrading VOCs in wood by utilizing ultrasonic activated persulfate
A technology for activating persulfate and persulfate, which is applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of difficult reagent recovery and treatment, large loss of three major elements of wood, and impact on wood quality, so as to reduce VOCs emissions , reduce generation and volatilization, and shorten the drying cycle
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Embodiment 1
[0033] A method utilizing ultrasonically activated persulfate to degrade VOCs in wood, comprising:
[0034] Step 1: Pretreatment: The wood to be treated is the heartwood of Chinese fir plantation, the specification is 20 mesh wood powder, and the initial moisture content is about 70%. The wood powder to be treated is air-dried to make the moisture content reach 30%;
[0035] Step 2: Oxidation treatment: Take 20g of 20-mesh wood flour, put it into a test tube, and then add 200g of potassium persulfate solution with a concentration of 3mmol / L, the pH value is 4.2, shake the wood flour to completely soak in the potassium persulfate solution , put it into an ultrasonic cleaner for ultrasonic treatment, the ultrasonic power is 210W, the temperature is set at 50°C, and the ultrasonic time is 120min.
[0036] Step 3: Circular treatment: After the oxidation treatment, take out the treated wood, and then dry it at 30-40°C.
Embodiment 2
[0038] A method utilizing ultrasonically activated persulfate to degrade VOCs in wood, comprising:
[0039] Step 1: pretreatment: the wood to be treated is the heartwood of plantation Chinese fir, and the specification is 30×20×5mm (length×width×thick) wood block, and the initial moisture content is about 70%, and the wood block to be treated is carried out air-drying treatment, so that Its moisture content reaches 30%;
[0040] Step 2: Oxidation treatment: Take 15 pieces of wooden blocks with set specifications, put them into a beaker, and then add a potassium persulfate solution with a concentration of 3mmol / L and a pH value of 4.2, so that the solution just covers the wooden blocks by about 2cm and keeps The wooden block is under the liquid surface and soaked for 4 hours; put it into an ultrasonic cleaner for ultrasonic treatment, the ultrasonic power is 210W, the temperature is set at 50°C, and the ultrasonic time is 120min;
[0041] Step 3: Circular treatment: After the ...
Embodiment 3
[0043] A method utilizing ultrasonically activated persulfate to degrade VOCs in wood, comprising:
[0044] Step 1: Pretreatment: The wood to be treated is Xinjiang poplar, the specification is 30 × 20 × 5mm (length × width × thickness) wood block, the initial moisture content is about 50%, and the wood block to be treated is air-dried to make it contain water rate up to 30%;
[0045] Step 2: Oxidation treatment: Take 15 pieces of wooden blocks with set specifications, put them into a beaker, and then add a potassium persulfate solution with a concentration of 3mmol / L and a pH value of 4.2, so that the solution just covers the wooden blocks by about 2cm and keeps The wooden block is under the liquid surface and soaked for 4 hours; put it into an ultrasonic cleaner for ultrasonic treatment, the ultrasonic power is 210W, the temperature is set at 50°C, and the ultrasonic time is 120min;
[0046] Step 3: Circular treatment: After the oxidation treatment, take out the treated woo...
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