Faculty of Water and Land Management Agriculture Academy, Vytautas Magnus University, Studentu 11, LT-53361 Akademija, Lithuania.
Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Studentu 48, LT-51367 Kaunas, Lithuania.
Molecules. 2021 May 19;26(10):3020. doi: 10.3390/molecules26103020.
In this study, straetlingite-based sorbents were used for NH ion removal from a synthetic aqueous solution and from the wastewater of an open recirculation African catfish farming system. This study was performed using column experiments with four different filtration rates (2, 5, 10, and 15 mL/min). It was determined that breakthrough points and sorption capacity could be affected by several parameters such as flow rate and mineral composition of sorption materials. In the synthetic aqueous solution, NH removal reached the highest sorption capacity, i.e., 0.341 mg/g with the S30 sorbent at a filtration rate of 10 mL/min and an initial concentration of 10 mg/L of NH ions. It is important to emphasize that, in this case, the Ce/C0 ratio of 0.9 was not reached after 420 min of sorption. It was also determined that the NH sorption capacity was influenced by phosphorus. In the wastewater, the NH sorption capacity was almost seven times lower than that in the synthetic aqueous solution. However, it should be highlighted that the P sorption capacity reached 0.512 mg/g. According to these results, it can be concluded that straetlingite-based sorbents can be used for NH ion removal from a synthetic aqueous solution, as well as for both NH and P removal from industrial wastewater. In the wastewater, a significantly higher sorption capacity of the investigated sorbents was detected for P than for NH.
在这项研究中，我们使用基于 straetlingite 的吸附剂从合成水溶液和开放式循环非洲鲶鱼养殖系统的废水中去除 NH 离子。这项研究是通过在四个不同过滤速率（2、5、10 和 15 mL/min）下进行的柱实验进行的。结果表明，穿透点和吸附容量可能受到流速和吸附材料的矿物组成等几个参数的影响。在合成水溶液中，NH 去除达到了最高的吸附容量，即在过滤速率为 10 mL/min 和 NH 初始浓度为 10 mg/L 的条件下，S30 吸附剂的吸附容量为 0.341 mg/g。重要的是要强调的是，在这种情况下，吸附 420 分钟后，Ce/C0 比未达到 0.9。还确定了磷对 NH 吸附容量的影响。在废水中，NH 的吸附容量比合成水溶液低近七倍。然而，应该强调的是，P 的吸附容量达到了 0.512 mg/g。根据这些结果，可以得出结论，基于 straetlingite 的吸附剂可用于从合成水溶液中去除 NH 离子，以及从工业废水中去除 NH 和 P。在废水中，与 NH 相比，所研究的吸附剂对 P 的吸附容量明显更高。
