In this study, a green adsorbent was synthesized for the removal of nitrate ions from water. The adsorbent consisted of carbonaceous particles with high specific surface area (1,240 m² g⁻¹) and porosity derived from pyrolysis of cornelian cherry stone and modified by protonated cross-linked chitosan. The adsorbent was characterized using various techniques like SEM, FTIR, BJH and zeta potential measurements. Dynamic behavior of the adsorbent in the nitrate adsorption was studied in a packed bed system at various operating conditions and in the presence of other competing anions (PO₄³⁻, HCO₃⁻, SO₄²⁻). Based on the error analysis, the optimum operating conditions were considered at flow rate of 3.8 mL min⁻¹, bed depth of 10 cm and nitrate concentration of 75 mg L⁻¹. The kinetics of the adsorption process was studied using Adams–Bohart and Thomas models and the q_max was calculated to be about 12.4 mg g⁻¹ at neutral pH and room temperature. Furthermore, the relationship between the bed height and the breakthrough time was described by bed depth service time (BDST) model. The experimental results suggested that the adsorbent possessed significant ability in nitrate removal from water due to the desired chemistry of the biopolymer and the excellent textural properties of the carbon support.

在这项研究中，合成了一种绿色吸附剂，用于从水中去除硝酸根离子。吸附剂由具有高比表面积（1,240 m ²  g ^-1）的碳质颗粒组成，其孔隙来自山茱cherry樱桃石的热解，并经质子化交联壳聚糖改性。使用各种技术（如SEM，FTIR，BJH和zeta电位测量）对吸附剂进行表征。在硝酸盐吸附吸附剂的动态行为在各种操作条件下的填充床系统和其它竞争阴离子的存在（PO进行了研究₄ ^3-，HCO ₃ ^-，SO ₄ ^2-）。基于误差分析，在3.8 mL min ^-1的流速，10 cm的床深度和75 mg L ^-1的硝酸盐浓度下考虑了最佳操作条件。使用Adams–Bohart和Thomas模型研究了吸附过程的动力学，在中性pH和室温下，q _max计算为约12.4 mg g ^-1。此外，用床深服务时间（BDST）模型描述了床高与突破时间之间的关系。实验结果表明，由于所需的生物聚合物化学性质和碳载体的优异质地，吸附剂具有从水中去除硝酸盐的显着能力。