(1. 中南大學 資源加工與生物工程學院，長沙 410083；
2. 中南大學 生物冶金教育部重點實驗室，長沙 410083)
摘 要: 綜述微生物胞外多聚物的關鍵組分-藻酸鹽的合成途徑、結構特征和作用機制，尤其分析了其在生物浸出過程中可能的作用機理；描述了研究藻酸鹽的方法和技術手段，包括藻酸鹽的提取及成分分析方法、藻酸鹽相關合成基因的定量分析方法以及藻酸鹽的原位觀察和檢測方法。這些都將為研究生物浸出過程中藻酸鹽的結構及其作用機理提供非常重要的理論依據(jù)和方法支撐。
關鍵字: 胞外多聚物；藻酸鹽；生物浸出；作用機理
（1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:The key components of microorganisms extracellular polymers alginate synthesis pathway, structure characteristics and action mechanism, especially, the potential mechanism in the process of biological leaching were summarized. Then, the research methods and technical means of alginate, including the extraction and composition analysis method, the quantitative analysis method of genes related to alginate synthesis and in situ observation and test methods of alginate, were described. All of these will provide important theoretical basis and method support for the structure and action mechanism of alginate.
Key words: extracellular polymeric substances; alginate; bioleaching; action mechanism
