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Highly efficient removal of methyl orange from aqueous media by amine functional cyclotriphosphazene submicrospheres as reusable column packing material
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2021-04-17 , DOI: 10.1016/j.cep.2021.108427
Alper Onder , Hava Ozay

Polyphosphazenes have an important place in material science because they allow functional diversity to be realized easily. In this study, for the first time, synthesis of cyclomatrix-type poly-(cyclotriphosphazene-co-4-(aminomethyl)-1,8-octanediamine) (Phz-AO) particles including different surface features and dimensions have been reported using different stoichiometric ratios of hexachlorocyclotriphosphazene and 4-(aminomethyl)-1,8-octanediamine. The use of Phz-AO (1:2) submicroparticles with spherical form and average dimension of 647.82 ± 22.23 nm as an adsorbent was researched for methyl orange (MO) anionic azo dye. Submicrospheres had significant potential for adsorption of negative charged MO and maximum adsorption capacity of 1244.7 mg.g  1. The submicrospheres displayed high adsorption potential at pH ≤6 conditions thanks to their surface amine groups. The maximum adsorption capacity in synthetic textile wastewater was 912.75 mg.g−1 as experimental. While the adsorption kinetics had the pseudo second order model, the most suitable model for adsorption was the Langmuir isotherm. The thermodynamic parameters for MO adsorption with submicrospheres were 10.02 ± 1.81 kj.mol−1 for ΔH°, 61.08 ± 5.74 j.mol−1.K−1 for ΔS° and ΔG° (kj.mol−1)<0. In light of all data obtained, the Phz-AO (1:2) submicrospheres which can be easily prepared with a single-step reaction are expected to be a remarkable member of the super adsorbent material family.



中文翻译:

胺官能环三磷腈亚微球作为可重复使用的柱填充材料从水性介质中高效去除甲基橙

聚磷腈在材料科学中具有重要地位,因为它们可以轻松实现功能多样性。在这项研究中,首次报道了使用不同的方法合成具有不同表面特征和尺寸的环基质型聚-(环三磷腈-co-4-(氨基甲基)-1,8-辛二胺)(Phz-AO)颗粒的方法。六氯环三磷腈和4-(氨基甲基)-1,8-辛二胺的化学计量比。研究了以球形形式,平均尺寸为647.82±22.23 nm的Phz-AO(1:2)亚微粒作为吸附剂,用于甲基橙(MO)阴离子偶氮染料。亚微球具有带负电的MO的巨大吸附潜力,最大吸附容量为1244.7 mg。g   1。由于其表面胺基,亚微球在pH≤6的条件下显示出高吸附潜力。作为实验,合成纺织品废水中的最大吸附容量为912.75 mg.g -1。尽管吸附动力学具有伪二级模型,但最合适的吸附模型是Langmuir等温线。对于亚微球,MO吸附的热力学参数对于ΔH°为10.02±1.81 kj.mol -1,对于ΔS°和ΔG°(kj.mol -1)<0为61.08±5.74 j.mol -1 .K -1。根据获得的所有数据,可以通过一步反应轻松制备的Phz-AO(1:2)亚微球有望成为超吸附材料家族的重要成员。

更新日期:2021-04-23
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