Abstract The removal of heavy metals by Streptomyces rimosus has been the subject of many investigations. This review paper focuses on the removal of heavy metals from aqueous solution through Streptomyces rimosus, produced from pharmaceutical industry as solid waste, as adsorbent, and discusses the effect of various process parameters like pH, temperature, metal concentration etc., on the metal removal efficiency of this bacterium. The paper also evaluates the different kinetic, equilibrium, and thermodynamic models used in Streptomyces rimosus sorption of heavy metals. Biomass characterization and sorption mechanisms as well as elution of metal ions are also discussed. The literature revealed that Streptomyces rimosus had a good affinity for binding lead and iron compared with other heavy metals. The adsorption of heavy metals is well described by Langmuir isotherm, which expresses the existence of monolayer adsorption. The kinetic data followed both pseudo first order and pseudo second order models. Thermodynamic studies showed spontaneous and exothermic nature of the sorption processes in most case. Dilute acids (HCl and H2SO4) are quite effective in desorption of heavy metals. Ion exchange played the chief role in the adsorption mechanism of metal, and carboxyl groups are mainly involved in this mechanism.

中文翻译：

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Streptomyces rimosus 生物质对水溶液中重金属的生物吸附性能

摘要 Streptomyces rimosus 去除重金属已成为许多研究的主题。这篇综述着重于通过制药工业生产的固体废物和吸附剂 Streptomyces rimosus 从水溶液中去除重金属，并讨论了各种工艺参数（如 pH 值、温度、金属浓度等）对金属去除的影响这种细菌的效率。该论文还评估了 Streptomyces rimosus 对重金属的吸附所使用的不同动力学、平衡和热力学模型。还讨论了生物质表征和吸附机制以及金属离子的洗脱。文献表明，与其他重金属相比，Streptomyces rimosus 具有良好的结合铅和铁的亲和力。Langmuir 等温线很好地描述了重金属的吸附，它表达了单层吸附的存在。动力学数据遵循伪一级和伪二级模型。在大多数情况下，热力学研究表明吸附过程具有自发性和放热性。稀酸（HCl 和 H2SO4）在解吸重金属方面非常有效。离子交换在金属吸附机理中起主要作用，羧基主要参与该机理。稀酸（HCl 和 H2SO4）在解吸重金属方面非常有效。离子交换在金属吸附机理中起主要作用，羧基主要参与该机理。稀酸（HCl 和 H2SO4）在解吸重金属方面非常有效。离子交换在金属吸附机理中起主要作用，羧基主要参与该机理。