Method for performing complete cotton knitted fabric dyeing post treatment using immobilization laccase
A technology for immobilizing laccase and cotton knitted fabrics, which is applied in the directions of biochemical fiber treatment, immobilization on/in organic carriers, fiber treatment, etc., can solve the heavy task of dyeing wastewater treatment, high production energy consumption, and COD value. Advanced problems, to achieve the effect of being beneficial to ecological environmental protection, reducing burden, and improving temperature and pH stability
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Embodiment 1
[0012] Example 1: Prepare 10 parts of 50mg / L Active Dark Blue B-2GLN respectively, and use the above-mentioned immobilized laccase enzyme beads to conduct a cycle decolorization experiment under the conditions of 50°C and pH 5.5, and the single decolorization cycle is 1h. Evaluate each decolorization efficiency according to the change of absorbance OD at the maximum absorption wavelength of 595nm before and after decolorization.
[0013] The experimental results showed that after 10 consecutive decolorization treatments, the 10th decolorization rate of the immobilized laccase enzyme beads remained at 51.5%, and the 10th decolorization rate reached an average of 75.5%, indicating that the immobilized laccase had good reusability .
Embodiment 2
[0014] Example 2: Dyeing 3 parts of cotton knitted wool cloth with 2.0% owf reactive red M-8B, dyeing at 60°C for 30 minutes, adding 2g / L soda ash for 20 minutes to fix the color, washing once at 60°C, and then carrying out under different conditions Post-staining treatment experiments.
[0015] Sample 1: treated with immobilized laccase for 30 minutes at 50°C and pH 5.5;
[0016] Sample 2: Washing treatment at 90°C for 30 minutes;
[0017] Sample 3: Treated with 1.0g / L detergent for 30 minutes at 90°C.
[0018] The knitted fabrics after the above treatment were tested for the soaping fastness and the absorbance OD value at 530nm of the treated samples under different conditions.
[0019] Sample 1: Soaping fastness grade 4-5; OD value = 0.022;
[0020] Sample 2: Soaping fastness grade 3-4; OD value = 0.153;
[0021] Sample 3: Soaping fastness grade 4-5; the system is turbid.
[0022] Comparing the samples of cotton knitted wool cloth after different dyeing treatments, the...
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