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首页> 外文期刊>Journal of Polymers and the Environment >Adsorption of Iron(Ⅲ) and Copper(Ⅱ) by Bacterial Cellulose from Rhodococcus sp. Ml 2
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Adsorption of Iron(Ⅲ) and Copper(Ⅱ) by Bacterial Cellulose from Rhodococcus sp. Ml 2

机译：红球菌属细菌纤维素对铁（Ⅲ）和铜（Ⅱ）的吸附毫升2

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摘要

Modified cellulose from the pellicle produced by Rhodococcus sp. MI 2 was more efficient at removing Fe(III) and Cu(II) from aqueous solution than similarly modified cellulose from Komagataeibar xylinus TISTR 998. This study first describes the modification of the cellulose to produce mercerized bacterial cellulose (MBC), phosphorylated bacterial cellulose (PBC), acid-base cellulose and diethylenetriamine bacterial cellulose (EABC). Their efficacy as adsorbents to adsorb Fe(III) and Cu(II) was then determined. In aqueous solution at pH 4 at initial Fe(III) concentration of 20mg/L, PBC reached adsorption equilibrium within 195min. At pH 5 in an initial Cu(II) concentration of 75mg/L, EABC reached adsorption equilibrium within 210min. Molecular structures and chemical bonds were examined by Fourier transform infrared spectroscopy (FT-IR) and physical morphologies by scanning electron microscopy. The adsorption kinetics of MBC, PBC and EABC showed good agreement with the proposed pseudo-second order model and the adsorption isotherm was best described by the Freundlich model. Our study determined optimal conditions, molecular structures, physical morphologies and adsorption kinetics. The cellulose produced by the new strain Rhodococcus sp. MI 2 was highly efficient at adsorbing and removing metal ions from aqueous solution.
机译：来自红球菌属菌种产生的防护膜的改性纤维素。 MI 2比类似的Komagataeibar xylinus TISTR 998改性纤维素从水溶液中去除Fe（III）和Cu（II）的效率更高。这项研究首先描述了纤维素的改性以生产丝光细菌纤维素（MBC），磷酸化细菌纤维素（PBC），酸碱纤维素和二亚乙基三胺细菌纤维素（EABC）。然后确定了它们作为吸附Fe（III）和Cu（II）的吸附剂的功效。在初始Fe（III）浓度为20mg / L的pH为4的水溶液中，PBC在195分钟内达到吸附平衡。在初始Cu（II）浓度为75mg / L的pH为5时，EABC在210分钟内达到吸附平衡。通过傅立叶变换红外光谱法（FT-IR）检查分子结构和化学键，并通过扫描电子显微镜检查物理形态。 MBC，PBC和EABC的吸附动力学与拟拟的二级模型吻合良好，吸附等温线最好用Freundlich模型描述。我们的研究确定了最佳条件，分子结构，物理形态和吸附动力学。新菌株Rhodococcus sp。产生的纤维素。 MI 2在从水溶液中吸附和去除金属离子方面非常有效。

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