Abstract

In this study, activated carbon was obtained from Elaeagnus angustifolia seeds and its usability in the adsorption of methylene blue (MB) and malachite green (MG) from aqueous solution was investigated. Activated carbon was synthesized by chemical activation method using H₃PO₄ as an activator. In the synthesis of the activated carbon, the effects of various parameters such as the rate of impregnation, duration of activation, temperature of activation and duration of activation were investigated. The characterization of the synthesized activated carbons was carried out by FTIR, SEM and BET analyses and the surface area of the produced activated carbon was determined to be 1,194 m² g⁻¹. The effects of solution initial pH, solution initial concentration and amount of activated carbon on MB and MG adsorption were investigated. The adsorption capacity was found to be higher when the pH of the solution was 8 for MB and 4 for MG. The adsorption kinetics of MB and MG were found to fit the Elovich kinetic model and pseudo-first-order kinetic model, respectively. Adsorption equilibrium data were found to be compatible with Langmuir isotherm for both dyes. According to the Langmuir isotherm, q_max adsorption capacity was found to be 72 mg/g and 115 mg/g for MB and MG, respectively.

Novelty Activated carbon was obtained from Elaeagnus angustifolia seeds and its usability in the adsorption of methylene blue (MB) and malachite green (MG) from aqueous solution was investigated. A high surface area activated carbon was synthesized. The surface area of the produced activated carbon was determined to be 1,194 m² g⁻¹. According to the Langmuir isotherm, q_max adsorption capacity was found to be 72 mg/g and 115 mg/g for MB and MG, respectively. It has been determined that the adsorption capacity of synthesized activated carbon is high.

摘要

在这项研究中，活性炭从油茶种子获得，并研究了其在水溶液中吸附亚甲基蓝（MB）和孔雀石绿（MG）的实用性。以H ₃ PO ₄为活化剂，通过化学活化法合成了活性炭。在合成活性炭时，研究了各种参数的影响，例如浸渍速率，活化时间，活化温度和活化时间。通过FTIR，SEM和BET分析对合成的活性炭进行表征，并且确定所产生的活性炭的表面积为1,194m ² g ^-1。研究了溶液初始pH，溶液初始浓度和活性炭含量对MB和MG吸附的影响。发现当MB的溶液的pH为8而MG的溶液的pH为4时，吸附能力更高。发现MB和MG的吸附动力学分别符合Elovich动力学模型和拟一级动力学模型。已发现两种染料的吸附平衡数据均与Langmuir等温线兼容。根据Langmuir等温线，发现MB和MG的q_最大吸附容量分别为72 mg / g和115 mg / g。

从沙枣（Elaeagnus angustifolia）种子中获得了新颖的活性炭，并研究了其在水溶液中吸附亚甲基蓝（MB）和孔雀石绿（MG）的实用性。合成了高表面积的活性炭。所生产的活性炭的表面积被确定为1,194 m ² g ^-1。根据Langmuir等温线，发现MB和MG的q_最大吸附容量分别为72 mg / g和115 mg / g。已经确定合成的活性炭的吸附容量高。