Microencapsulation of Bacillus megaterium NCT-2 and its effect on remediation of secondary salinization soil
Microencapsulation of Bacillus megaterium NCT-2 and its effect on remediation of secondary salinization soil
复制标题
巨大芽孢杆菌NCT-2的微胶囊化及其对次生盐渍化土壤的修复效果
DOI：
10.1080/02652048.2019.1705409
复制
发表时间：
2020-01-04
影响因子：
3.9
通讯作者：
Zhang, Dan
中科院分区：
文献类型：
--
作者：
Chi, Yaowei;Wang, Daxin;Zhang, Dan
目的：通过喷雾干燥制备微胶囊，并评估其在次级盐水补救层中的效率，以延长巨型NCT-2芽孢杆菌的保质期。方法：优化了墙壁材料和喷雾干燥条件。测量了微囊的形态特征，并在田间条件下测试了土壤修复作用。结果：当在150.0摄氏度进行喷雾干燥时，用壳聚糖/麦芽糊精的1：1获得了巨型链球菌微胶囊的存活率，分别为800 ml H（-1）和1000 ml H（-1）。在上述条件下获得0.93 +/- 0.01的跨度值。存储6个月后，微囊存活率为64.09 +/- 0.12％。此外，在强生盐土壤中成功降低了46.5 +/- 1.48％和45.2 +/- 1.51％的微囊成功降低了NO3和EC值。结论：Megaterium NCT-2微胶囊具有在次级盐水土壤的修复中的应用潜力。
Abstract Aim: To prolong the shelf life of Bacillus megaterium NCT-2 by preparing microcapsules through spray drying, and evaluate their efficiency in secondary salinisation soil remediation. Methods: The wall material and spray drying conditions were optimised. Morphological characteristics of microcapsule were measured, and soil remediation effects were tested under field conditions. Results: A relatively higher survival rate of B. megaterium microcapsule was obtained with 1:1 of chitosan/maltodextrin (w/w) when spray drying was performed at 150.0 °C, with the feed flow rates of 800 mL h−1 and 1000 mL h−1, respectively. The span value of 0.93 ± 0.01 was obtained under above conditions. Microcapsule survival rate was 64.09 ± 0.12% after 6 months of storage. Moreover, microcapsule successfully decreased NO3− and EC value in strongly saline soil by 46.5 ± 1.48% and 45.2 ± 1.51%, respectively. Conclusion: Bacillus megaterium NCT-2 microcapsules have application potential in the remediation of secondary salinisation soil.