In this investigation, activated carbon was prepared from Prosopis juliflora (PJAC) and characterized using porosimetry, scanning electron microscope (SEM-EDX), Elemental analysis (CHNS), Fourier Transmission-Infrared Radiation (FTIR) and X-ray Diffraction (XRD) analysis. Subsequently, PJAC was used in single (metronidazole (MNZ), phosphate (PO₄^3-) and nitrate (NO₃^-)) and multi-component adsorption system (MNZ:P:N). As a first step, single-component batch adsorption experiments, i.e. kinetic and equilibrium studies, were conducted at controlled conditions (30°C) and outcomes were used to find out the rate constant and maximum adsorption capacity (q_m$q_m$). The pseudo-second-order kinetic model was found to well represent the removals of MNZ, PO₄^3- and NO₃^- on PJAC. Among the five isotherm models used, Langmuir isotherm model has predicted q_m$q_m$ of PJAC for MNZ (17.33 mg/g), PO₄^3- (13.55 mg/g) and NO₃^- (10.99 mg/g) with good correlation. In addition, the thermodynamic parameters have shown that the adsorption of MNZ, PO₄^3- and NO₃^- was non-spontaneous, endothermic and increased randomness in nature. In order to quantify the competitive adsorption of a multi-component system, i.e. MNZ, PO₄^3- and NO₃^-, the batch experiments were conducted in the presence of all three compounds at a ratio of 1:2.5:5 at three different MNZ:P:N concentrations levels (0.1:0.25:0.5, 1:2.5:5 and 10:25:50 mg/L). The modified Langmuir competitive adsorption isotherm model was used to predict the effect of competitive adsorption. In a multi-component system, the maximum adsorption capacities of MNZ and NO₃^- were decreased by ∼34 and ∼2 times, respectively than single compound system; however, it was increased by ∼1.12 times for PO₄^3-. Overall, the results indicate that PJAC could be used as a potential adsorbent for the removal of emerging pollutants and nutrients.

在这项研究中，活性炭是由朱s Prosopis juliflora（PJAC）制备的，并使用孔隙率法，扫描电子显微镜（SEM-EDX），元素分析（CHNS），傅立叶透射红外辐射（FTIR）和X射线衍射（XRD）进行了表征。分析。随后，在PJAC单个使用（甲硝唑（MNZ），磷酸盐（PO ₄ ^3-）和硝酸盐（NO ₃ ^- ））和多组分吸附系统（MNZ：P：N）。第一步，在受控条件下（30°C）进行单组分间歇吸附实验，即动力学和平衡研究，并使用结果找出速率常数和最大吸附容量（q _m$q_{米}$）。伪二级动力学模型发现很好地代表MNZ，PO的清除₄ ^3-和NO ₃ ^-上PJAC。在使用的五个等温线模型中，Langmuir等温线模型预测了q _m$q_{米}$的PJAC对MNZ（17.33毫克/克），PO ₄ ^3-（13.55毫克/克）和NO ₃ ^-以良好的相关性（10.99毫克/克）。此外，热力学参数表明MNZ的吸附，PO ₄ ^3-和NO ₃ ^-是非自发的，吸热和在自然界中增加随机性。为了量化的多组分体系的竞争吸附，即MNZ，PO ₄ ^3-和NO ₃ ^-，在三种不同的MNZ：P：N浓度水平（0.1：0.25：0.5、1：2.5：5和10:25:50）下，所有三种化合物均以1：2.5：5的比例进行分批实验毫克/升）。修改后的Langmuir竞争吸附等温线模型用于预测竞争吸附的效果。在多组分体系中，MNZ和NO的最大吸附容量₃ ^-被〜34个〜2倍，分别比单一化合物系统降低; 然而，对于PO ₄ ^3-，它增加了约1.12倍。总体而言，结果表明，PJAC可用作潜在的吸附剂，用于去除新兴的污染物和养分。