This work reveals a modified method for the preparation of activated carbon (P-ACA) using low-cost materials (mix natural asphalt: polypropylene waste). The P-ACA was prepared at 600 °C by assisting KOH and HF. The morphological variations and chemical species of the P-ACA were characterized using SEM–EDX and FTIR. The active surface area, density and ash content of the P-ACA were also investigated. Adsorption properties of P-ACA were used for the thermodynamic and kinetic study of 4-((2-hydroxy naphthalenyl) diazenyl) antipyrine (HNDA), which was prepared as a novel azo dye in this work. The optimal conditions (initial concentration, adsorbent dose, contact time and temperature) of the adsorption process were determined. Adsorption isotherms (Freundlich and Langmuir) were applied to the experimental data. These isothermal constants were used to describe the nature of the adsorption system, and the type of interaction between the dye and the P-ACA surface. The results have indicated that the mixture (Natural asphalt-polypropylene waste) is efficient for the synthesis of P-ACA. The synthesized P-ACA demonstrates the presence of pores on the surface with various diameter ranges (from 1.4 to 4.5 μm). Furthermore, P-ACA exhibits an active surface area of 1230 m² g⁻¹, and shows a high adsorption capacity for HNDA.

这项工作揭示了一种使用低成本材料（混合天然沥青：聚丙烯废料）制备活性炭（P-ACA）的改良方法。通过辅助KOH和HF在600°C下制备P-ACA。使用SEM–EDX和FTIR对P-ACA的形态变化和化学物种进行了表征。还研究了P-ACA的活性表面积，密度和灰分。P-ACA的吸附性能用于4-（（2-羟基萘基）二氮烯基）安替比林（HNDA）的热力学和动力学研究，该化合物是本研究中制备的新型偶氮染料。确定了吸附过程的最佳条件（初始浓度，吸附剂量，接触时间和温度）。吸附等温线（Freundlich和Langmuir）应用于实验数据。这些等温常数用于描述吸附系统的性质以及染料与P-ACA表面之间相互作用的类型。结果表明，该混合物（天然沥青-聚丙烯废料）对于合成P-ACA是有效的。合成的P-ACA证明了在各种直径范围（1.4至4.5μm）的表面上都存在孔。此外，P-ACA的有效表面积为1230 m²  g ^-1，显示出对HNDA的高吸附能力。