School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan University, Kunming 650091, China.
Sci Total Environ. 2021 Jun 15;773:145706. doi: 10.1016/j.scitotenv.2021.145706. Epub 2021 Feb 6.
The hydrophilic biomaterial was constructed based on the soluble extracellular polysaccharides (s-EPS) secreted by Bacillus megaterium and zeolitic imidazolate framework-8 (ZIF-8), namely ZIF-8@s-EPS, wrapped in s-EPS shell with ZIF-8 as the core. ZIF-8@s-EPS was used as a novel multifunctional biomaterial in water treatment for the first time. Unexpectedly, results showed ZIF-8@s-EPS with strong synergistic effect presented multifunctional performances including descaling, antifouling and antibacterial. Scale inhibition efficiency reached 98.63% for CaCO and as high as 99.40% for CaSO at concentration 20.00 mg/L. The synergy of s-EPS and ZIF-8 demonstrated effective antibacterial activity against Pseudomonas aeruginosa and inhibitory effect on biofilms, and result presented that ZIF-8@s-EPS could inhibit the growth of nearly 89.4% P. aeruginosa. Therefore, the obtained insights will shed light on the development of s-EPS modified biomaterials in water treatment.
基于巨大芽孢杆菌分泌的可溶性胞外多糖（s-EPS）和沸石咪唑酯骨架-8（ZIF-8）构建了亲水性生物材料，即 ZIF-8@s-EPS，其以 ZIF-8 为核，被 s-EPS 壳包裹。ZIF-8@s-EPS 首次被用作水处理中的新型多功能生物材料。出乎意料的是，结果表明，具有强协同作用的 ZIF-8@s-EPS 表现出多种功能，包括除垢、防污和抗菌。在 20.00mg/L 浓度下，对碳酸钙的阻垢率达到 98.63%，对硫酸钙的阻垢率高达 99.40%。s-EPS 和 ZIF-8 的协同作用表现出对铜绿假单胞菌的有效抗菌活性和对生物膜的抑制作用，结果表明 ZIF-8@s-EPS 可以抑制近 89.4%的铜绿假单胞菌生长。因此，获得的见解将为水处理中 s-EPS 修饰生物材料的发展提供启示。
