In this study, biochar was synthesized using Mustard Seed cake as raw biomass with the carbonization method. Biochar materials, namely, Mustard Seed cake biochar was prepared at 500 °C temperatures. This biochar was further modified with Conc. Nitric acid solution. The surface modified biochar was characterized using Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The potential of synthesized adsorbent was evaluated for the elimination of methylene blue and malachite green dye from textile wastewater as a function of numerous provisions, namely, contact time, pH of solution, number of adsorbents, and initial concentrations of adsorbates. Various kinetic and isotherm models were examined to consider and explain the sorption mechanisms. Methylene Blue can be removed 97% of the time with functionalized biochar (0.03g/25 ml). Like that, 0.06g/25 ml of functionalized biochar may remove 95% of the maximal amount of Malachite Green. Surface Functionalized biochar showed high pollutant removal efficiency with maximum removal of % for MG and % for MB dye. Kinetic studies showed that the pseudo-second-order kinetic model showed better agreement with kinetic experimental data than other kinetic models. The linear Isotherm models showed that Freundlich, and Temkin isotherms are best fitted on the adsorption of Dyes with R2 =0.998. The results of this research showed that the synthesized adsorbents can be applied efficiently for various cycles to remove MG and MB from textile wastewater on pilot scale.

中文翻译：

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用于纺织废水处理的功能化生物炭杂化颗粒的合成


在本研究中，以芥菜籽饼为原料生物质，采用碳化法合成生物炭。生物炭材料，即芥末籽饼生物炭是在 500 °C 的温度下制备的。该生物炭用浓度硝酸溶液进一步改性。使用扫描电子显微镜 （SEM） 、 X 射线衍射 （XRD） 和傅里叶变换红外光谱 （FTIR） 对表面改性生物炭进行了表征。评估了合成吸附剂从纺织废水中消除亚甲蓝和孔雀石绿染料的潜力，作为许多规定的功能，即接触时间、溶液的 pH 值、吸附剂的数量和吸附物的初始浓度。检查了各种动力学和等温线模型，以考虑和解释吸附机制。使用功能化生物炭 （0.03g/25 ml） 可以在 97% 的情况下去除亚甲蓝。像这样，0.06 克/25 毫升功能化生物炭可以去除最大量的 95% 的孔雀石绿。表面功能化生物炭显示出高污染物去除效率，最大去除 MG 的 % 和 MB 染料的 %。动力学研究表明，与其他动力学模型相比，伪二级动力学模型显示出更好的动力学实验数据一致性。线性等温线模型表明，Freundlich 和 Temkin 等温线最适合 R2 =0.998 的染料吸附。这项研究的结果表明，合成的吸附剂可以在各种循环中有效地应用，以中试规模从纺织废水中去除 MG 和 MB。