生物加工过程2019，Vol.17Issue(2)：214-219,6.DOI:10.3969/j.issn.1672-3678.2019.02.016
太湖蓝藻多糖应用于重金属离子吸附
Adsorption of heavy metal by polysaccharide of Cyanobacteria from Taihu Lake
摘要
Abstract
Polysaccharide was extracted from Cyanobacteria collected from Taihu Lake, and further used to adsorb Pb2+ and Cd2+.Polysaccharide from Cyanobacteria was extracted with ultrasonic assisted hot water extraction, and extraction conditions, including extraction time, temperature and solid-liquid ratio, were optimized.Meanwhile, effects of adsorption conditions (polysaccharide dosage, adsorption time, pH and treating temperature) on Pb2+ and Cd2+ adsorption by crude polysaccharide were also investigated.The highest yield of polysaccharide was 25.1％ under the following condition:solid-liquid ratio of 40∶ 1 mL/g, temperature of 80 ℃ and extraction time of 5 h.Moreover, with the dosage of 100 mg, biosorption time of 3 h, pH 7.0, treating at 25 ℃, the equilibrium adsorption of Pb2+ and Cd2+ was up to 73.81 and 49.69 mg/g, respectively.Compared with Freundlich isotherm model, Langmuir isotherm model was more suitable to describe the adsorption of Pb2+ and Cd2+ by extracted polysaccharide.Depending on this study, Cyanobacteria collected from Taihu Lake could be the extraction source of polysaccharide, with the potential for absorption of heavy metals in polluted water.关键词
蓝藻/多糖/重金属吸附/平衡吸附量Key words
Cyanobacteria/polysaccharide/heavy metal adsorption/balance adsorption capacity分类
化学化工引用本文复制引用
黄依佳,吴剑荣,朱莉,詹晓北..太湖蓝藻多糖应用于重金属离子吸附[J].生物加工过程,2019,17(2):214-219,6.基金项目
水体污染控制与治理科技重大专项(2017ZX07203-001) （2017ZX07203-001）
