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用盐酸羟胺对PAN纤维进行改性,再进一步螯合三价铁离子,制备PAN光催化纤维,研究其在光催化降解水溶性染料废水中的脱色工艺条件及脱色广谱性。结果表明,对含活性黄X-R 32 mg/L的染料溶液150 mL,在pH为4,光源波长254 nm,H2O2用量为2 mmol/L,催化纤维用量为2 g,1 h后的脱色率达到99%。在相同的工艺条件下,对不同结构的水溶性染料脱色性能不同。且多次循环应用PAN催化纤维并不影响其脱色效率。
PAN fibers were modified with hydroxylamine hydrochloride, and further ferric ion was chelated to prepare PAN photocatalytic fibers. The bleaching process conditions and the broad spectrum of decolorization in photocatalytic degradation of water-soluble dye wastewater were studied. The results showed that the decolorization rate of 150 mL of dye solution containing reactive XR 32 mg / L was achieved at pH 4, 254 nm light source, 2 mmol / L H2O2 and 2 g catalytic fiber for 1 h 99%. In the same process conditions, different structures of water-soluble dyes have different decolorization properties. The repeated application of PAN catalyst fiber does not affect its decolorization efficiency.