Optimal production of bioflocculant from Pseudomonas sp. GO2 and its removal characteristics of heavy metals

被引：8
作者：
Feng, Jiayin [1 ,2 ]
Xu, Yijie [1 ,2 ]
Ding, Jianhui [1 ,2 ]
He, Jikun [1 ,2 ]
Shen, Yihan [1 ,2 ]
Lu, Guimeng [1 ,2 ]
Qin, Wensheng [3 ]
Guo, Haipeng [1 ,2 ]
机构：
[1] Ningbo Univ, State Key Lab Managing Biot & Chem Threats Qual &, Ningbo 315211, Peoples R China
[2] Ningbo Univ, Sch Marine Sci, Ningbo 315211, Peoples R China
[3] Lakehead Univ, Dept Biol, Thunder Bay, ON P7B 5E1, Canada
来源：
JOURNAL OF BIOTECHNOLOGY | 2022年 / 344卷
基金：
中国国家自然科学基金;
关键词：
Pseudomonas sp. GO2; Bioflocculant; Fermentation condition; Heavy metal removal; Adsorption mechanism; WASTE-WATER; AQUEOUS-SOLUTION; OPTIMIZATION; ADSORPTION; IONS; LEAD; COAGULATION; BIOSORPTION; SORPTION; CADMIUM;
D O I：
10.1016/j.jbiotec.2021.12.012
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Bioflocculant may be a promising bioactivator for heavy metal removal duo to its eco-friendly properties and remarkable ability to adsorb heavy metals. In this study, bioflocculant production from a bacterium, Pseudomonas sp. GO2, was optimized and its removal efficiency for two heavy metal ions was evaluated. Results demonstrated that the maximal flocculation efficiency was achieved with concentration levels of 5 g/L glucose, 3 g/L casein, and 5 g/L NaCl, with an initial pH of 9.0, and a fermentation time of 48 h. Bioflocculant produced by GO2 had a stronger removal efficiency for Cd2+ than that of Pb2+, with highest removal efficiencies of 85.38% and 80.87%, respectively. The adsorption process was mainly dependent on the monolayer and chemisorption based on the adsorption isotherm and kinetic models. This study demonstrated that bioflocculant produced by the GO2 strain has the potential to be used in heavy metal treatment from industrial wastewater.
引用
收藏
页码：50 / 56
页数：7
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