期刊论文

Characteristics and Mechanisms Study on Adsorption of U(VI) from Water by Lactobacillus plantarum

中文

水处理技术

1000-3770

2019

45

2

61-66

10.16796/j.cnki.1000-3770.2019.02.013

国家自然科学基金(11475080) 南华大学博士科研启动基金项目(2016XQD06).

本校为第一机构

以热灭活的植物乳杆菌为生物吸附剂,探讨了吸附U(VI)的影响,并采用扫描电镜-能谱、红外光谱等手段研究了U(VI)的吸附机理。结果表明,植物乳杆菌对U(VI)具有良好的吸附效果。在pH为6.0,温度30℃,灭活乳杆菌投加量为120 mg/L,初始U(VI)的质量浓度为10 mg/L时,植物乳杆菌对U(VI)的去除率可达94.28%,吸附平衡时间为4 h。吸附过程较好符合准2级动力学吸附模型和Freundlich模型。经过灭活的植物乳杆菌的菌体比表面积增加,能更好的吸附U(VI),配位络合是菌体吸附U(VI)的主要机理,参与吸附的官能团有细胞表面多糖与蛋白质羟基、蛋白质酰胺基、羧基与磷酸酯基等。此外菌体表面的静电作用也是吸附的方式之一...

The heat-killed Lactobacillus plantarum was used as biosorbent to investigate the effects on U(VI) adsorption. The adsorption mechanism was investigated by SEM-EDS, FTIR and other methods. The results showed that Lactobacillus plantarum had a good adsorption effect on U(VI). When the pH was 6, the temperature was 30 ℃, the inactivated Lactobacillus dosage was 120 mg/L, and the initial mass concentration of U(VI) was 10 mg/L,the U(VI) adsorption efficiency of heat-killed Lactobacillus plantarum was up to 94.28% and balanced at 240 minutes. The ...