食品与发酵工业2025，Vol.51Issue(19)：214-221,8.DOI:10.13995/j.cnki.11-1802/ts.041849
聚谷氨酸-壳聚糖季铵盐改性物的合成及对微藻絮凝的研究
Synthesis of polyglutamic acid-chitosan quaternary ammonium salt modifications and their flocculation study on microalgae
摘要
Abstract
Polyglutamic acid,a biocompatible and environmentally friendly natural polymer,has potential as a green flocculant;How-ever,its efficiency in microalgae harvesting remains suboptimal.In this study,a novel bioflocculant,PGA-CTS-GTA,was synthesized for microalgae harvesting.The preparation involved mixing two biopolymers,polyglutamic acid(γ-PGA)and chitosan(CTS),in equal pro-portions,followed by reaction with 2,3-epoxypropyl trimethyl ammonium chloride(GTA)under acidic conditions.The optimal preparation conditions were determined through single-factor experiments.The modified flocculant was systematically characterized through infrared spectroscopy,scanning electron microscopy,and zeta potential analysis,with its flocculation mechanism comprehensively studied.The re-sults indicated that the optimal reaction conditions were as follows:A reaction pH of 3,a mass ratio of 7∶1 for GTA to the PGA-CTS mix-ture,a reaction duration of 4 hours,and a temperature of 75℃.At a dosage of 100 mg/L,the flocculation efficiency reached 91.2％un-der conditions of stirring at 300 r/min for 1 minute and settling for 1 hour.Analysis of the characterization results revealed that,apart from charge neutralization,bridging and sweeping mechanisms were also critical in the flocculation process of PGA-CTS-GTA.关键词
γ-聚谷氨酸/壳聚糖/季铵盐改性/絮凝剂/微藻采收Key words
γ-polyglutamic acid/chitosan/quaternary ammonium salt modifications/flocculants/microalgae harvesting引用本文复制引用
吴蔚,张晓慧,丁运敏,郭麒,牟洪晓,闫达中,李鑫..聚谷氨酸-壳聚糖季铵盐改性物的合成及对微藻絮凝的研究[J].食品与发酵工业,2025,51(19):214-221,8.基金项目
湖北省重点研发计划项目(2022BCA075) （2022BCA075）
