The aim of this study is to apply a water treatment technique (phyto-purification) in the Algerian Sahara, an arid region, to resolve the scarcity of irrigation, recycled wastewater and preserve Saharian ecosystems composed of sand and two species of aquatic plants: Typha latifolia and Imperata cylindrica. The choice of these plants was determined based on the natural vegetation, soil and climatic characteristics of the study area. To this end, we developed an experimental pilot composed of three tanks measuring 30 cm × 35 cm × 45 cm, arranged with a filter bed of sand and gravel. Two of these tanks are sown with the above-mentioned plants, while the third tank, serving as a control, is not. The values of the main wastewater pollution parameters, namely total nitrogen compounds, ammonium (NH₄⁺), chemical oxygen demand (COD) and suspended solids measured at the outlet of the device, substantiate the performance of this treatment system. Indeed, the nitrogen reduction rate increased from 63% in the unplanted control filters to around 80% in the planted filters, and from 81 to 88% for NO₃⁻. Regarding chemical oxygen demand (COD), the reduction rate exceeds 88.37% for the three tanks. The study of the analytical approach to modeling the purification kinetics reveals that the kinetics of COD and NH₄⁺ are well correlated with the first-order model, with an explained variance varying between 68.1 and 81.6% for COD and 83.5 and 92.3% for ammonium. The Riverside diagram highlights that all treated water samples fall into the low sodium risk and high salinity risk class. Build on the Na% values; all purified waters have characteristics suitable for water use for irrigation.

本研究的目的是在阿尔及利亚撒哈拉干旱地区应用水处理技术（植物净化），以解决灌溉、回收废水的短缺问题，并保护由沙子和两种水生植物组成的撒哈拉生态系统：香蒲大叶白茅和白茅。这些植物的选择是根据研究区域的自然植被、土壤和气候特征确定的。为此，我们开发了一个实验装置，由三个尺寸为 30 厘米 × 35 厘米 × 45 厘米的水箱组成，并布置有沙子和砾石滤床。其中两个水箱种植了上述植物，而作为对照的第三个水箱则没有种植。装置出口处测得的主要废水污染参数，即总氮化合物、氨氮(NH ₄ ⁺ )、化学需氧量(COD)和悬浮固体的值证实了该处理系统的性能。事实上，氮减少率从未种植的对照过滤器中的 63% 增加到种植的过滤器中的 80% 左右，NO ₃ ^-的氮减少率从 81% 增加到 88% 。化学需氧量（COD）方面，三个罐的减少率超过88.37%。对纯化动力学建模的分析方法的研究表明，COD 和 NH ₄ ⁺的动力学与一阶模型密切相关，COD 的解释方差在 68.1% 到 81.6% 之间变化，铵的解释方差在 83.5% 到 92.3% 之间变化。 。 Riverside 图强调所有处理过的水样均属于低钠风险和高盐度风险类别。以 Na% 值为基础；所有净化水都具有适合灌溉用水的特性。