Since the presence of arsenic in the waters of the world causes serious health effects on people, it is very important to remove it. Layered double hydroxides have a high surface area and high anion exchange capacity, and because of this feature, it is a potential adsorbent to remove arsenic. For regeneration and reuse of adsorbents, researchers in some limited studies have used agents such as acids and alkalis. Media replacement accounts for approximately 80% of the total operational and maintenance costs. In this paper, an adsorption/desorption/regeneration study was carried out with MgFeHT to determine the desorption properties of the adsorbent and to examine its reusability. The best alkaline desorption solution was determined from two different alkaline solutions: NaOH and KH₂PO₄. As(V) adsorption capacity of the MgFeHT at different pH (3–12) using the arsenic aqueous solution (with 2,000 μg As(V)/L) was evaluated. For the adsorption process, the experimental data are fitted well with the pseudo-second-order kinetic model and the Langmuir model. Moreover, the concentration of 2,000 μg/L arsenic was reduced to below the legal limit determined by the WHO (<10 μg/L). The regeneration studies were conducted on the adsorptive media used in the arsenic removal system. The regeneration efficiency of As(V) was maintained 98.5% for four regeneration cycles using 0.5 M NaOH. MgFeHT was successfully regenerated with an aqueous solution of NaOH and was reused with a small loss of sorption efficiency.

由于世界水域中砷的存在会对人们的健康造成严重影响，因此去除砷非常重要。层状双氢氧化物具有较高的表面积和较高的阴离子交换能力，由于这一特点，它是一种潜在的除砷吸附剂。对于吸附剂的再生和再利用，研究人员在一些有限的研究中使用了酸和碱等试剂。介质更换约占总运营和维护成本的 80%。在本文中，对 MgFeHT 进行了吸附/解吸/再生研究，以确定吸附剂的解吸性能并检查其可重复使用性。最佳碱性解吸溶液由两种不同的碱性溶液确定：NaOH 和 KH ₂ PO ₄. 使用砷水溶液（2,000 μg As（V）/L）评估了 MgFeHT 在不同 pH 值（3-12）下的 As（V）吸附能力。对于吸附过程，实验数据与拟二级动力学模型和朗缪尔模型拟合良好。此外，2,000 μg/L 砷的浓度降低到低于 WHO 确定的法定限值（<10 μg/L）。对除砷系统中使用的吸附介质进行了再生研究。在使用 0.5 M NaOH 的四个再生循环中，As(V) 的再生效率保持在 98.5%。MgFeHT 成功地用 NaOH 水溶液再生，并在吸附效率损失很小的情况下重新使用。