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[5,6];Li, Wenyan;Luo, Chunling[2];Ding, Aizhong[5,6];Zhang, Dayi[3]

机构：[1]Guangdong Ocean Univ, Coll Agr, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China;[3]Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 2YQ, England;[4]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[5]Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China;[6]South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

年份：2015

卷号：190

起止页码：82

外文期刊名：BIORESOURCE TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000355200200012)、、EI(收录号：20151900818378)、Scopus(收录号：2-s2.0-84928736977)、WOS

基金：The authors would like to thank National Natural Science Foundation of China (Nos. 41301331, 41301252) for financial support.

语种：英文

外文关键词：Magnetic nanoparticles (MNPs); Microcystis aeruginosa; Cyanobacteria harvesting; Electrostatic attraction

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. (C) 2015 Elsevier Ltd. All rights reserved.