BC@Laccase消减材料优化制备及其去除水体中2-氯苯酚性能评价

Preparation of BC@Laccase Eliminate Material and Its Performance for 2-chlorophenol Removal in Water

关键词:  细菌纤维素  固定化技术  漆酶  介体  2-氯苯酚

Key Words:bacterial cellulose  immobilization  laccase  medium  2-chlorophenol

摘要:本研究采用戊二醛将漆酶（Laccase）固定于细菌纤维素（BC）基材上，通过优化交联工艺，制备环境友好、重复使用的BC@Laccase消减材料；利用场发射扫描电子显微镜（FESEM）、傅里叶变换红外光谱仪（FT-IR）、热重分析仪（TGA）对其进行表征；评价其催化降解水体中2-氯苯酚性能。结果表明，BC@Laccase消减材料的最佳制备工艺条件为：固定时间4 h、固定温度25℃、环境pH值3.5；利用BC@Laccase消减材料对水体中2-氯苯酚进行催化降解，当芥子酸用量4 mmol/L、降解温度30℃、环境pH 值3、降解时间5 h时，对2-氯苯酚降解能力最强，降解率达到76.9%；经过7次循环使用，BC@Laccase消减材料对2-氯苯酚的催化降解能力仍可保持在最初的84.8%以上。

Abstract:In this study， glutaraldehyde was employed to fix laccase on bacterial cellulose （BC） substrate to prepare eco-friendly and reusable BC@Laccase eliminate materials by optimizing the crosslinking condition. FESEM， FT-IR， and TGA were used to characterize the obtained BC@Laccase product. The degradation performance of BC@Laccase on 2-chlorophenol in water was evaluated as well. The results showed that the optimal preparation process for the BC@Laccase was as follows：fixed time 4 h， fixed temperature 25℃， and pH value 3.5. The maximum catalytic degradation rate of 2-chlorophenol in water using BC@Laccase reached 76.9% under the catalytic conditions of erucic acid dosage of 4 mmol/L， degradation temperature of 30℃， pH value of 3， and degradation time of 5 h. Meanwhile， the catalytic degradation ability of BC@Laccase remained higher than 84.8% of its original capability after 7 cycles of use.