期刊论文

Isolation, identification and cadium adsorption characteristics of a Cd-resistant Ralstonia strain

中文

中南林业科技大学学报

1673-923X

2020

40

6

149-157

10.14067/j.cnki.1673-923x.2020.06.018

2016YFD0800805-4:国家重点研发计划 21707169:国家自然科学基金 2017SK2273:湖南省重点研发计划项目 2016SK2030:湖南省重点研发计划项目

本校为第一机构

【目的】水体镉(Cd)污染日益加剧,严重威胁生态安全和居民身体健康,而微生物吸附法被认为是一种行之有效的Cd污染修复方法,本研究从Cd污染土壤中分离出了一株耐Cd菌株,探究其吸附能力,以期为微生物修复提供技术支持和理论依据。【方法】利用16S rDNA基因测序分析对其进行鉴定。采用单因素试验研究了菌粉吸附Cd~(2+)的影响因素及规律,用正交试验优化了菌粉吸附Cd~(2+)的最佳条件,通过吸附等温线的拟合与SEM、EDX、FTIR表征研究了菌粉吸附Cd~(2+)的机理。【结果】菌株LC经测序分析后鉴定为罗尔斯通氏菌Ralstonia spp.,Cd~(2+)的耐受阈值为850 mg/L。随着溶液温度的升高,LC菌粉对Cd~(2+)的吸附量先...

【Objective】Cadmium wastewater is becoming more and more serious, which deadly threatens ecological safety and the health of residents. The biosorption method is considered to be an effective method for repairing Cd pollution. In this study, a Cd-resistant strain was isolated from cadmium contaminated soil to explore the ability of the bacteria. We want to provide necessary technical support and theoretical basis for microbial remediation.【Method】We identified it by 16SrDNA gene sequencing analysis. The influence factors and rules of Cd~(2+)...