This study examined the feasibility of using zeolite clinoptilolite to removal nitrate, phosphate pollutants, and salt from the agricultural drainage water. To that end, significant pollutant absorption parameters, such as adsorbent particle size, pollutant concentration, salinity, temperature, retention time, pH, and adsorbent concentration, were optimized in the batch condition. Having optimized the parameters, the researchers conducted adsorption experiments on an experimental model, similar to the subsurface drainage systems applied in farms. Adsorption experiments were carried out at the optimized parameter levels on four models, namely a reference model (D0), a model with adsorbents around the drains (D1), a model with adsorbents around the plant roots (D2), and a model with adsorbents on the soil surface (D3). These models were fed with untreated drainage water from the farms in the south of Khuzestan during the fertilization season. In the batch adsorption experiments, the results showed 63% nitrate removal efficiency, 39% phosphate removal efficiency, and 79% salt removal efficiency using 30 g.L^-1 of 1000 µm adsorbent particles for a pH of 5, and initial pollutant concentration of 80 mg.L^-1 nitrate and 10 mg.L^-1 phosphate in 12 dS/m salinity during a 90-min retention time period at 50 °C ambient temperature. These parameter levels led to nitrate, phosphate, and salt removal efficiencies of 59.72, 29.28, and 77.47%, respectively, in the model with clinoptilolite adsorbents around the drains (D1).

本研究检验了使用沸石斜发沸石去除农业排水中的硝酸盐、磷酸盐污染物和盐分的可行性。为此，在批量条件下优化了重要的污染物吸收参数，如吸附剂粒径、污染物浓度、盐度、温度、保留时间、pH 值和吸附剂浓度。优化参数后，研究人员对实验模型进行了吸附实验，类似于农场中应用的地下排水系统。在四个模型的优化参数水平下进行吸附实验，即参考模型（D0）、排水管周围有吸附剂的模型（D1）、植物根部周围有吸附剂的模型（D2）和有吸附剂的模型在土壤表面 (D3)。这些模型在施肥季节用来自胡齐斯坦南部农场的未经处理的排水水喂养。在批量吸附实验中，结果显示使用 30 gL 的硝酸盐去除效率为 63%，磷酸盐去除效率为 39%，盐去除效率为 79%^-1个 1000 µm 吸附剂颗粒，pH 值为 5，初始污染物浓度为 80 mg.L ^-1硝酸盐和 10 mg.L ^-1磷酸盐，盐度为 12 dS/m，在 50 ° 的 90 分钟保留时间内C 环境温度。在排水管周围装有斜发沸石吸附剂的模型中，这些参数水平导致硝酸盐、磷酸盐和盐分去除效率分别为 59.72%、29.28% 和 77.47%。