Sorption is considered a promising approach for removing various divalent metal cations, yet the complicated recovery and regeneration strategy restricts the application of powder-like adsorbents. Herein, we report an innovative Mg(OH)₂@GO adsorbents loaded on activated carbon fiber cloth (ACFC) using an electrophoretic deposition process (EDP) of Mg(OH)₂ and graphene oxide (GO) suspensions to achieve rapid removal of Cd²⁺, Pb²⁺, Ni²⁺, and Cu²⁺ via flow-through adsorption over an ultra-short period time. FESEM and HRTEM results revealed a cross-linked structure on the ACFC surface derived from the cation-π interaction between Mg²⁺ and GO under EDP. Importantly, by virtue of oxygen-containing functional groups and π electron region, Mg(OH)₂@GO exhibited high adsorption capacities for Pb²⁺, Cu²⁺, Cd²⁺, and Ni²⁺, which could reach 647.2, 439.5, 297.3, and 219.1 mg g⁻¹ at 293 K, respectively. Furthermore, Mg(OH)₂@GO-ACFC possessed a rapid regeneration capability with EDTA by a flow-through system for divalent metal cations desorption and exhibited excellent repeatability in 5-cycle tests. Overall, we propose the novel flow-through system that facilitates the rapid adsorption and recovery of divalent metal cations for wastewater treatment.

吸附被认为是一种有前途的去除各种二价金属阳离子的方法，但复杂的回收和再生策略限制了粉末状吸附剂的应用。在此，我们报告了一种创新的 Mg(OH) _{2 @GO 吸附剂，该吸附剂使用 Mg(OH) 2和氧化石墨烯 (GO) 悬浮液}的电泳沉积工艺 (EDP) 负载在活性炭纤维布 (ACFC) 上，以实现对 Cd 的快速去除。²⁺、Pb ²⁺、Ni ²⁺和Cu ²⁺通过流通吸附在超短的时间内。FESEM 和 HRTEM 结果显示 ACFC 表面上的交联结构源自 Mg ²⁺和 GO之间的阳离子-π 相互作用在 EDP 下。重要的是，凭借含氧官能团和π电子区，Mg(OH) ₂ @GO对Pb ²⁺、Cu ²⁺、Cd ²⁺和Ni ²⁺表现出较高的吸附容量，可达647.2、439.5 、297.3 和 219.1 mg g ^-1在 293 K 时，分别。此外，Mg(OH) ₂ @GO-ACFC 通过用于二价金属阳离子解吸的流通系统与 EDTA 具有快速再生能力，并在 5 次循环测试中表现出优异的重复性。总体而言，我们提出了一种新型流通系统，该系统有助于快速吸附和回收用于废水处理的二价金属阳离子。