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首页> 外文期刊>Journal of Polymers and the Environment >A Novel Eco-Biosorbent for Decontamination of Hazardous Dye from Aqueous Medium
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A Novel Eco-Biosorbent for Decontamination of Hazardous Dye from Aqueous Medium

机译：用于从水性介质中去除有害染料的新型生态生物吸附剂

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摘要

A novel multi-component biosorbent consisted of pine, oak, hornbeam and fir sawdust biomasses was used to eliminate a common hazardous dye (Malachite green, MG) from aqueous solution. The influences of different parameters like solution pH, biosorbent amount, dye concentration and contact time on the removal process were thoroughly studied to evaluate optimum biosorption conditions. The pseudo-first-order, pseudo-second-order, Elovich, logistic and intra-particle diffusion models were used to describe the biosorption kinetics. Logistic model represented the kinetic experimental data well. The experimental equilibrium biosorption data were analyzed by Freundlich, Langmuir and Dubinin-Radushkevich isotherms. Freundlich model fitted better with the experimental data compared to others. In addition, the mean free energy obtained from Dubinin-Radushkevich model and the standard Gibbs free energy change indicated that the nature of biosorption was feasible, spontaneous and physical type. Overall, the novel eco-biosorbent could be used as a promising biosorbent to remove such unsafe dye molecules from aqueous environments.
机译：一种由松树，橡树，角树和锯木屑生物质组成的新型多组分生物吸附剂用于从水溶液中消除常见的有害染料（孔雀石绿，MG）。彻底研究了溶液pH，生物吸附量，染料浓度和接触时间等参数对去除过程的影响，以评估最佳生物吸附条件。拟一阶，拟二阶，Elovich，logistic和粒子内扩散模型用于描述生物吸附动力学。 Logistic模型很好地表示了动力学实验数据。实验平衡生物吸附数据通过Freundlich，Langmuir和Dubinin-Radushkevich等温线进行分析。与其他模型相比，Freundlich模型更适合实验数据。此外，从杜比宁-拉杜什凯维奇模型获得的平均自由能和标准吉布斯自由能的变化表明，生物吸附的性质是可行的，自发的和物理的。总体而言，新型生态生物吸附剂可以用作从水性环境中去除此类不安全的染料分子的有前途的生物吸附剂。

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