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首页> 外文期刊>American Journal of Environmental Sciences >Valuation of Biomaterial: Phragmites australis in the Retention of Metal-Complexed Dyes
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Valuation of Biomaterial: Phragmites australis in the Retention of Metal-Complexed Dyes

机译：生物材料的价值：芦苇中保留金属复杂染料。

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The purpose of this research was to estimate the potential of cellulosic fibers of highly available and renewable Tunisian biomass Phragmites australis for the biosorption of an anionic metal complexed dye: Alpacide blue. The present study shows that the Phragmite australis were used successfully for the adsorption of Alpcide blue from aqueous solution. Equilibrium was reached after 5 h at 20°C and at pH 2. Optimal adsorption parameters for adsorption of dye onto fibers extract of upper rods were accomplished after 5 h of biosorption using an initial dye concentration of 50 mg L-1, biosorbent amount of 0.5 g of Phragmites australis, pH 2 and a granulometry size between 250 and 500 μm. In these conditions, the adsorbed amount of Alpacide blue is 6.11 mg g-1 and the biosorption percentage is 85.9%. When the temperature increases until 60°C, the retention rate increases also to reach a value of 90.5%. Regarding fibers extracted from roots, we notice improvement of the adsorbed amount which reaches 7.0 mg g-1 and the overall retention rate of 92.6% at 20°C. While at 60°C the amount adsorbed is 7.4 mg g-1 and the fixation rate reached 94%. The biosorption phenomenon seems to be endothermic. Moreover the adsorption process is fast, following the model of pseudo-second order for both parts of the plant stems and roots. Finally, mathematical modeling of adsorption isotherms showed that the Freundlich model perfectly describes the biosorption of organic dye studied by these fibers of Phragmites australis for both stems and roots.
机译：这项研究的目的是评估高度可用和可再生的突尼斯生物质芦苇中的纤维素纤维对阴离子金属络合物染料：羊脂蓝的生物吸附的潜力。目前的研究表明，芦苇被成功地用于从水溶液中吸附Alpcide蓝。在20°C和pH 2下5 h后达到平衡。生物吸附5 h后，使用50 mg L-1的初始染料浓度，2 mg / l的生物吸附量，完成了染料吸附在上杆纤维提取物中的最佳吸附参数。 0.5 g芦苇，pH 2，粒度在250至500μm之间。在这些条件下，Alpacide blue的吸附量为6.11 mg g-1，生物吸附率为85.9％。当温度升高到60°C时，保留率也增加到90.5％。关于从根中提取的纤维，我们注意到吸附量有所改善，达到7.0 mg g-1，在20°C时的总保留率为92.6％。在60°C时，吸附量为7.4 mg g-1，固色率达到94％。生物吸附现象似乎是吸热的。此外，对于植物茎和根的两个部分都遵循伪二级顺序的模型，吸附过程很快。最后，吸附等温线的数学模型表明，Freundlich模型完美地描述了由芦苇的这些纤维研究的有机染料对茎和根的生物吸附。

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