For the first time combustion residue of agricultural waste i.e. groundnut plant is characterized in detail and explored as an adsorbent for removal of chlorinated herbicide, paraquat. The study investigates the chemical, physical, mineralogical, and morphological characteristics of GPA (Groundnut Plant Ash) adsorbent produced using groundnut plant. GPA has been characterized using the Fourier Transform Infrared (FTIR) spectroscopy to determine the functional groups, and Scanning Electron Microscopy (SEM) to examine the surface morphology of the carbon. Batch adsorption is performed by varying adsorbent dosage, initial concentration and contact time. Result shows that the kinetic models mainly the pseudo-second order and Elovich model had the best fit. The equilibrium data are analyzed using different isotherm models. The adsorption capacity of GPA for paraquat removal is found 265.71 mg/m² which is the highest reported value.

中文翻译：

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花生植物灰：去除百草枯二氯化物的表征和吸附功效研究

首次对农业废弃物即花生植物的燃烧残渣进行了详细表征，并探索了其作为去除氯化除草剂百草枯的吸附剂。该研究调查了使用花生植物生产的GPA（花生植物灰）吸附剂的化学，物理，矿物学和形态学特征。GPA的特征是使用傅立叶变换红外（FTIR）光谱法确定官能团，并使用扫描电子显微镜（SEM）检查碳的表面形态。分批吸附是通过改变吸附剂量，初始浓度和接触时间来进行的。结果表明，动力学模型主要是伪二阶模型和Elovich模型最适合。使用不同的等温线模型分析平衡数据。²是最高报告值。