Beakou Buscotin Horax, El Hassani Kaoutar, Houssaini Mohammed Amine, Belbahloul Mounir, Oukani Elhassan, Anouar Abdellah
University Hassan First, Faculty of Science and Technology, Laboratory of Applied Chemistry and Environment, BP 577, Route de Casa, Settat 26000, Morocco E-mail:
Water Sci Technol. 2017 Sep;76(5-6):1447-1456. doi: 10.2166/wst.2017.332.
The adsorptive removal of Malachite Green (MG) by a novel biochar namely Cassava Rind Carbon (CRC) was studied in a batch system. Moreover, Box-Behnken Response Surface Methodology was used to optimize operating conditions of the adsorption process. Characterization was done by Thermo Gravimetric Analysis (TGA), Attenuated Total Reflectance Fourier Transform Infra-Red Spectroscopy (ATR/FTIR), Brunauer-Emmett-Teller (BET) surface area, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and pH zero charge point (pH). The pseudo-second-order model and Langmuir model provided the best fit for kinetic and isotherm, respectively. The maximum capacity of dye adsorbed was 932.98 mg/g at 25 °C. The influence of temperature, the mass of adsorbent and the concentration of dye was studied. The optimal amount of adsorbed MG was 1,363.58 mg/g corresponding to 50 °C, 5 mg of CRC and 150 mg/L of dye. According to the high performance exhibited by CRC in this study, Manihot esculenta Crantz waste can be used as a better and low-cost biomass for wastewater decolourization.
在间歇式系统中研究了一种新型生物炭即木薯皮炭（CRC）对孔雀石绿（MG）的吸附去除效果。此外，采用Box-Behnken响应面法对吸附过程的操作条件进行优化。通过热重分析（TGA）、衰减全反射傅里叶变换红外光谱（ATR/FTIR）、布鲁诺尔-埃米特-特勒（BET）比表面积、扫描电子显微镜（SEM）、X射线衍射（XRD）和零电荷点pH值（pH）进行表征。伪二级模型和朗缪尔模型分别对动力学和等温线拟合效果最佳。在25℃时，染料的最大吸附量为932.98mg/g。研究了温度、吸附剂质量和染料浓度的影响。对应于50℃、5mg CRC和150mg/L染料时，MG的最佳吸附量为1363.58mg/g。根据本研究中CRC表现出的高性能，木薯废弃物可作为一种更好且低成本的生物质用于废水脱色。
