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Characterization and application of spherical carbonaceous materials prepared with the use of microwave radiation
Diamond and Related Materials ( IF 4.3 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.diamond.2020.107927
Justyna Kazmierczak-Razna , Natalia Wasik , Piotr Nowicki , Justyna Bak , Dorota Kolodynska , Robert Pietrzak

Abstract A series of new synthetic spherical carbonaceous sorbents has been prepared by carbonization and physical activation of strongly acidic ion exchange resin - Wofatit RH. The carbonaceous materials were prepared using two different variants of thermal treatment - microwave and conventional heating. The samples obtained were characterized using various techniques, i.e. elemental analysis, determination of surface pH as well as the content of oxygen functional groups according to the Boehm titration method. The porous structures of all samples under investigation were characterized by low temperature nitrogen adsorption/desorption. Thermal properties of the spherical carbonaceous materials were investigated using thermogravimetric analysis as well as differential thermogravimetry. Kinetic and sorption studies of the removal of organic dye Bismarck Brown Y by adsorption on the carbonaceous adsorbents were carried out. In order to optimize the sorption effectiveness, the effects of contact time, initial dye concentration, pH of dye solution as well as temperature were studied. The products obtained were spherical carbonaceous materials of surface area ranging from 0.02 to 194 m2/g and pore volume from 0.0001 to 0.18 cm3/g. More favorable textural parameters were revealed by activated carbons obtained with the use of microwave radiation. It was found that the sorption capacity towards Bismarck Brown Y increased with the increasing initial concentration of the dye solution as well as the phases contact time.

中文翻译:

微波辐射制备球形含碳材料的表征及应用

摘要 通过强酸性离子交换树脂Wofatit RH的碳化和物理活化,制备了一系列新型合成球形碳质吸附剂。碳质材料是使用两种不同的热处理变体——微波和常规加热来制备的。获得的样品使用各种技术进行表征,即元素分析、表面pH的测定以及根据Boehm滴定法的氧官能团的含量。所研究的所有样品的多孔结构均以低温氮吸附/解吸为特征。使用热重分析和差示热重分析研究了球形碳质材料的热性能。进行了通过在碳质吸附剂上吸附去除有机染料 Bismarck Brown Y 的动力学和吸附研究。为了优化吸附效果,研究了接触时间、初始染料浓度、染料溶液的pH值以及温度的影响。获得的产品是表面积为0.02至194m2/g和孔体积为0.0001至0.18cm3/g的球形碳质材料。使用微波辐射获得的活性炭揭示了更有利的结构参数。发现对 Bismarck Brown Y 的吸附能力随着染料溶液初始浓度的增加以及相接触时间的增加而增加。为了优化吸附效果,研究了接触时间、初始染料浓度、染料溶液的pH值以及温度的影响。获得的产品是表面积为0.02至194m2/g和孔体积为0.0001至0.18cm3/g的球形碳质材料。使用微波辐射获得的活性炭揭示了更有利的结构参数。发现对 Bismarck Brown Y 的吸附能力随着染料溶液初始浓度的增加以及相接触时间的增加而增加。为了优化吸附效果,研究了接触时间、初始染料浓度、染料溶液的pH值以及温度的影响。获得的产品是表面积为0.02至194m2/g和孔体积为0.0001至0.18cm3/g的球形碳质材料。使用微波辐射获得的活性炭揭示了更有利的结构参数。发现对 Bismarck Brown Y 的吸附能力随着染料溶液初始浓度的增加以及相接触时间的增加而增加。18 立方厘米/克。使用微波辐射获得的活性炭揭示了更有利的结构参数。发现对 Bismarck Brown Y 的吸附能力随着染料溶液初始浓度的增加以及相接触时间的增加而增加。18 立方厘米/克。使用微波辐射获得的活性炭揭示了更有利的结构参数。发现对 Bismarck Brown Y 的吸附能力随着染料溶液初始浓度的增加以及相接触时间的增加而增加。
更新日期:2020-10-01
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