期刊论文

Mechanism of U (VI) removal by Lactobacillus plantarum under inactivated and non-inactivated conditions

中文

中国环境科学

1000-6923

2019

39

7

2880-2888

10.19674/j.cnki.issn1000-6923.2019.0340

国家自然科学基金资助项目（11475080）； 湖南省南华大学博士科研启动基金项目（2016XQD06）；

本校为第一机构

在不同时间,pH值和生物量浓度条件下,进行了灭活与非灭活植物乳杆菌去除水中铀的对比试验,探讨了二者去除水中铀的机理,通过SEM-EDS、 FTIR、XPS及XRD分析了铀与菌体表面的微观作用机理以及菌体表面沉积物的特征.结果表明:植物乳杆菌经灭活后,其吸附铀的能力得到显著的提高,当U(VI)初始浓度为10mg/L、pH值为6.0、37℃条件下,120min内灭活菌体对U(VI)的去除率为94.7%,而活菌体的去除率为88.9%.灭活菌体具有更高的铀吸附容量,在生物量浓度为0.06~0.24mg/L,pH值(3.0~7.0)条件下,灭活菌体与活菌体的U(VI)累积容量比W均大于1. SEM-EDS、FTIR分析结果表明,活细胞和灭活细胞都可通过细胞表面的羟基、酰...

The uranium removal tests of inactivated and non-inactivated Lactobacillus plantarum were carried out under different pH and biomass concentration conditions, and the mechanism of uranium removal by Lactobacillus plantarum was discussed. Based on SEM-EDS, FTIR, XPS, and XRD, the microscopic mechanism of the interaction between uranium and microbial cell surface and the characteristics of sediments on the cell surface were analyzed. The ability of Lactobacillus plantarum to adsorb uranium was significantly improved after heat inactivation. With ...