改性蚁酸木质素的制备与应用

采用加拿大一枝黄花茎杆为原料提取蚁酸木质素，通过氧化或接枝复合的方法对蚁酸木质素进行改性，对改性产物进行了FTIR和SEM表征。实验结果表明：接枝复合改性产物中存在-CONH的接枝复合链，氧化改性产物基本保持了蚁酸木质素原来的吸收峰；采用接枝复合改性产物处理初始质量浓度为50 mg/L的亚甲基蓝废水，在废水pH 7、吸附时间4 h、改性产物加入量22 mg/mL的条件下，亚甲基蓝去除率为90.94%；采用氧化改性产物处理相同亚甲基蓝废水，在废水pH 10、吸附时间12 h、改性产物加入量22 mg/mL的条件下，亚甲基蓝去除率为81.93%。

Preparation and Application of Modified Formic Acid Lignin

Formic acid lignin was extracted from Canadian goldenrod and modified by oxidation or graft composition. The modification products were characterized by FTIR and SEM. The experimental results show that：The graft composition-modified product has -CONH grafted chain；The oxidation-modified product maintains basically the absorption peaks of original formic acid lignin；When the graft composition-modified product was used to treat the methylene blue wastewater with 50 mg/L of initial mass concentration under the conditions of wastewater pH 7，adsorption time 4 h and modified product dosage 0.022 g/mL，the methylene blue removal rate is 90.94%；When the oxidation-modified product was used to treat the same wastewater under the conditions of wastewater pH 10，adsorption time 12 h and modified product dosage 0.022 g/mL，the methylene blue removal rate is 81.93%.