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首页> 外文期刊>Journal of industrial and engineering chemistry >Influence of adsorption parameters of basic red dye 46 by the rough and treated Algerian natural phosphates
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Influence of adsorption parameters of basic red dye 46 by the rough and treated Algerian natural phosphates

机译：粗糙和经过处理的阿尔及利亚天然磷酸盐对碱性红色染料46的吸附参数的影响

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The paper reports on the adsorption behavior of basic red dye 46 from aqueous solution onto rough and treated Algerian natural phosphates. Adsorption tests were realized in static mode on natural rock phosphate and treated samples by sifting, chemical or thermal way. The adsorption process was evaluated as a function of various operating parameters such as contact time, pH of the medium, temperature, concentration, agitation speed and adsorbent mass. The adsorption ability depends mainly on the nature of mineralogical species as well as on the smoothness of the grains. It was found that the dye has more affinity for the carbonate-rich than for the phosphate-rich material. The amount of the dye adsorbed increases with the mass of adsorbent. The adsorption process was pH-dependent with a high adsorption capacity at pH 8. The chemical and thermal treatments performed on different phosphate samples have affected negatively their adsorption capacity of the dye used. The experimental isotherm data were analyzed using the Langmuir, Freundlich and Temkin models. The equilibrium data fit well the Langmuir isotherm. The calculations of the maximum amounts (q(m)) obtained from this model have shown that it is the fine fraction (T) which adsorbs the highest amount (28.5 mg g(-1)), followed by the coarse fraction (C) (15.62 mg g(-1)) and raw phosphate (RP) (14.7 mg g(-1)). The best results were obtained for dye concentration of 15 mg g(-1), adsorbent mass of 3 g L-1, agitation speed of 300 trs min(-1), and pH 8 at 20 degrees C. The experimental data were analyzed using three kinetic models: the pseudo first order, pseudo second order and intraparticle diffusion models. The linear regression, standard statistics of root mean squared error (RMSE) was carried out to support the best fit kinetic models. Based on the low RMSE values, the pseudo second order model is the one that best describes the adsorption of basic red dye 46 on phosphates. The results obtained in this study suggest that Algerian natural phosphates may be used as an efficient and low cost sorbent material for organic pollutants, and thus represent a promising alternative for eliminating dyes from industrial wastewaters. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：该论文报道了碱性红色染料46从水溶液到粗糙和经过处理的阿尔及利亚天然磷酸盐上的吸附行为。通过筛分，化学或热方法对天然磷矿和处理过的样品进行静态吸附测试。根据各种操作参数（例如接触时间，介质的pH值，温度，浓度，搅拌速度和吸附剂质量）评估吸附过程。吸附能力主要取决于矿物种类的性质以及颗粒的光滑度。发现该染料对富含碳酸盐的物质比对富含磷酸盐的物质具有更大的亲和力。吸附的染料量随吸附剂的质量而增加。吸附过程取决于pH，在pH 8时具有高吸附能力。在不同磷酸盐样品上进行的化学和热处理对所用染料的吸附能力产生了负面影响。使用Langmuir，Freundlich和Temkin模型分析实验等温线数据。平衡数据很好地拟合了朗缪尔等温线。从该模型获得的最大量（q（m））的计算表明，吸附最高量（28.5 mg g（-1））的是细级分（T），其次是粗级分（C） （15.62 mg g（-1））和粗磷酸盐（RP）（14.7 mg g（-1））。在20摄氏度下，染料浓度为15 mg g（-1），吸附质量为3 g L-1，搅拌速度为300 trs min（-1）和pH 8时，可获得最佳结果。分析了实验数据使用三种动力学模型：伪一级，伪二级和粒子内扩散模型。进行了线性回归，均方根误差（RMSE）的标准统计，以支持最佳拟合动力学模型。基于较低的RMSE值，伪二级模型是最能描述碱性红色染料46在磷酸盐上的吸附的模型。这项研究获得的结果表明，阿尔及利亚的天然磷酸盐可以用作有机污染物的有效且低成本的吸附材料，因此代表了一种从工业废水中去除染料的有前途的替代方法。 （C）2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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