Microencapsulation of Bacillus megaterium NCT-2 and its effect on remediation of secondary salinization soil

被引：70
作者：
Chi, Yaowei [1 ,2 ]
Wang, Daxin [1 ,2 ]
Jiang, Miao [1 ,2 ]
Chu, Shaohua [1 ,2 ]
Wang, Bin [1 ,2 ]
Zhi, Yuee [1 ,2 ]
Zhou, Pei [1 ,2 ]
Zhang, Dan [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[2] Minist Agr & Rural Affairs, Key Lab Urban Agr, Shanghai, Peoples R China
来源：
JOURNAL OF MICROENCAPSULATION | 2020年 / 37卷 / 02期
基金：
中国博士后科学基金;
关键词：
Bacillus megaterium; microcapsules; secondary salinisation; spray drying; biological agent; ENCAPSULATION EFFICIENCY; SALINITY; SURVIVAL; OPTIMIZATION; FORMULATION; PROBIOTICS; CHITOSAN; NITRATE; TEMPERATURE; CHALLENGES;
D O I：
10.1080/02652048.2019.1705409
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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 degrees 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.
引用
收藏
页码：134 / 143
页数：10
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