A novel flocculant prepared by lignin nanoparticles-gelatin complex from switchgrass for the capture of Staphylococcus aureus and Escherichia coli

作者：Yin, Huijun; Liu, Lihua; Wang, Xin; Wang, Tao; Zhou, Yuan; Liu, Bianfang; Shan, Yuanyuan; Wang, Lin^*; Lu, Xin^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2018, 545: 51-59.

DOI：10.1016/j.colsurfa.2018.02.033

• Lignin nanoparticles
• L-NPs-gelatin complex
• Flocculation
• Bacteria

Lignin nanoparticles (L-NPs) were firstly prepared from switchgrass lignin by using ultrasonic-assisted alkali method, after which L-NPs were assembled with gelatin to constitute L-NPs-gelatin complex as a novel flocculant. Both Gram-positive (Staphylococcus aureus, S.aureus) and Gram-negative (Escherichia coli, E.coli) strains were used to investigate the flocculation property of L-NPs and L-NPs-gelatin complex. It was found that L-NPs-gelatin complex exhibited relatively better flocculation capacity than L-NPs, in which the flocculation efficiency was greatly affected by pH and dosage. For both indicator strains, flocculation efficiency (> 95%) was achieved within 30 min at pH 4.5, while the flocculation efficiency of 90% costed 60 min at pH 5. The L-NPs-gelatin complex was promising to be applied for flocculating bacteria in wastewater treatment, enrichment and detection of microorganism, etc.

• 出版日期2018-5-20
• 单位西北农林科技大学