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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
收稿日期:2021-01-28  
DOI:10.11980/j.issn.0254-508X.2021.06.008
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
基金项目:浙江省重点研发计划项目(2020C04015);浙江省自然科学基金面上项目(LY19C160010);浙江省基础公益研究计划项目(LGF18C160002);制浆造纸工程国家重点实验室开放基金项目(201758);杭州市科技计划项目(20191203B28)。
作者单位邮编
陈杰 上海策安能源科技有限公司上海201822 201822
杨云 上海策安能源科技有限公司上海201822 201822
胡雪怡 浙江理工大学材料科学与工程学院浙江杭州310018 310018
张勇 浙江理工大学材料科学与工程学院浙江杭州310018 310018
龚宇 生态环境部核与辐射安全中心北京100082 100082
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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.
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