Al-Asadi Safaa Talib, Al-Qaim Fouad Fadhil, Al-Saedi Haider Falih Shamikh, Deyab Issa Farhan, Kamyab Hesam, Chelliapan Shreeshivadasan
Department of Chemistry, College of Sciences for Women, University of Babylon, Hilla, Iraq.
College of Pharmacy, University of Al-Ameed, Karbala, Iraq.
Environ Monit Assess. 2023 May 16;195(6):676. doi: 10.1007/s10661-023-11334-2.
Fig leaf, an environmentally friendly byproduct of fruit plants, has been used for the first time to treat of methylene blue dye. The fig leaf-activated carbon (FLAC-3) was prepared successfully and used for the adsorption of methylene blue dye (MB). The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and the Brunauer-Emmett-Teller (BET). In the present study, initial concentrations, contact time, temperatures, pH solution, FLAC-3 dose, volume solution, and activation agent were investigated. However, the initial concentration of MB was investigated at different concentrations of 20, 40, 80, 120, and 200 mg/L. pH solution was examined at these values: pH3, pH7, pH8, and pH11. Moreover, adsorption temperatures of 20, 30, 40, and 50 °C were considered to investigate how the FLAC-3 works on MB dye removal. The adsorption capacity of FLAC-3 was determined to be 24.75 mg/g for 0.08 g and 41 mg/g for 0.02 g. The adsorption process has followed the Langmuir isotherm model (R = 0.9841), where the adsorption created a monolayer covering the surface of the adsorbent. Additionally, it was discovered that the maximum adsorption capacity (Qm) was 41.7 mg/g and the Langmuir affinity constant (KL) was 0.37 L/mg. The FLAC-3, as low-cost adsorbents for methylene blue dye, has shown good cationic dye adsorption performance.
无花果叶是水果植物的一种环保副产品，首次被用于处理亚甲基蓝染料。成功制备了无花果叶活性炭（FLAC - 3）并用于吸附亚甲基蓝染料（MB）。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和布鲁诺尔 - 埃米特 - 泰勒（BET）对吸附剂进行了表征。在本研究中，考察了初始浓度、接触时间、温度、溶液pH值、FLAC - 3剂量、溶液体积和活化剂等因素。然而，MB的初始浓度在20、40、80、120和200 mg/L的不同浓度下进行了研究。溶液pH值在pH3、pH7、pH8和pH11这些值下进行了检测。此外，考虑了20、30、40和50℃的吸附温度，以研究FLAC - 3对MB染料去除的作用方式。对于0.08 g的FLAC - 3，其吸附容量测定为24.75 mg/g，对于0.02 g的FLAC - 3，吸附容量为41 mg/g。吸附过程遵循朗缪尔等温线模型（R = 0.9841），其中吸附形成了覆盖吸附剂表面的单分子层。此外，发现最大吸附容量（Qm）为41.7 mg/g，朗缪尔亲和常数（KL）为0.37 L/mg。FLAC - 3作为亚甲基蓝染料的低成本吸附剂，表现出良好的阳离子染料吸附性能。
