文献类型：期刊文献

英文题名：Application and reactivation of magnetic nanoparticles in Microcystis aeruginosa harvesting

作者：Lin, Zhong[1,2,3]; Xu, Yunfeng[4]; Zhen, Zhen[1]; Fu, Yu[4]; Liu, Yueqiao[5]; Li, Wenyan[6]; Luo, Chunling[2]; Ding, Aizhong[5]; Zhang, Dayi[3]

机构：[1] College of Agriculture, Guangdong Ocean University, Zhanjiang, 524088, China; [2] Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; [3] Lancaster Environment Centre, Lancaster University, Lancaster, LA1 2YQ, United Kingdom; [4] School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; [5] College of Water Sciences, Beijing Normal University, Beijing, 100875, China; [6] College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China

年份：2015

卷号：190

起止页码：82

外文期刊名：Bioresource Technology

收录：EI(收录号：20151900818378)

语种：英文

外文关键词：Bacteria - Methanol - Isotherms - Nanoparticles - Organic solvents - Biomass - Nanomagnetics - Chlorine compounds - Harvesting - Ultrasonic applications

外文摘要：This study developed a magnetic nanoparticles (MNPs) harvesting and reactivation technique for rapid cyanobacteria Microcystis aeruginosa separation. The harvesting of raw MNPs achieved high efficiency of 99.6% with the MNPs dosage of 0.58. g MNPs/g dry-biomass, but gradually decreased to 59.1% when directly reused 5 times. With extra ultrasonic chloroform:methanol solvent treatment, the MNPs can be effectively reactivated for M. aeruginosa harvesting with 60% efficiency after 5 times reactivation and the separation efficiency kept above 93% with 0.20. g MNPs/g dry-biomass dosage. The cyanobacteria-MNPs complex can be effectively disrupted by ultrasonic chloroform:methanol solvent treatment and the zeta potential was recovered for MNPs electrostatic attraction. The MNPs adsorption followed the Langmuir isotherm, and the maximum adsorption capacity and Langmuir constant was 3.74. g dry-biomass/g and 311.64. L/g respectively. This MNPs reactivation technique can achieve low energy separation and reduce MNPs consumption by 67%, providing potential engineering implementation for cyanobacterial biomass harvesting. ? 2015 Elsevier Ltd.