Layered double hydroxides for removing and recovering phosphate: Recent advances and future directions

Hotspots and Trends of Layered Double Hydroxide-based Adsorbents for Polluted Water Treatment: Insights from Bibliometric Analysis

“…Recent progress in nanoscience and nanotechnology has allowed researchers to design nanosized materials with the desired structure and functionality, and in this sense a growing interest in the use of HDLs for water remediation as an adsorbent has been observed (Jiang et al, 2018). These materials present their unique characteristic structures, such as i) tunability of the elemental composition of the host layer where the metallic cations reside, ii) high ion exchange capacity due to the interchangeability of interlayer anions and iii) controllability of the interlayer distance and dimensions of the material by incorporation of suitable anions (Crini, 2005;Jiang et al, 2018;Keyikoglu et al, 2022). In addition to the type of metal cation, the ratio of divalent and trivalent (M 2+/ M 3+ ) can be regulated.…”

“…Thus, LDHswith different element compositions and metal cation ratios can be produced. These materials exhibit differences in their morphology and crystal structure, which allows them to be designed for a speci c purpose (Keyikoglu, Khataee, and Yoon, 2022).…”

Synthesis of MgAl-LDH@ZIF-8 composites by in situ growth method for highly efficient phosphate removal

“…The phosphate concentration in untreated wastewater is generally between 5 mg L À1 and 30 mg L À1 . 3 To further explore the practical applicability of MgAl-LDH@ZIF-8, the simulated effluent was prepared according to the highest phosphate concentration in the effluent (30 mg P L À1 ), and the concentrations of other ions are shown in Table S4 (ESI †). Adsorption experiments were conducted on simulated wastewater by varying the amount of adsorbent dosing.…”

“…Studies have shown that phosphate concentrations in untreated wastewater usually range from 5 mg L −1 to 30 mg L −1 . 3 However, a large amount of phosphate discharge leads to eutrophication of the water body, which accelerates the reproduction of harmful algae and destroys the self-purification ability of the water body. 4 There are severe impacts on human health and ecosystems.…”

“…show that the adsorption process is spontaneous and endothermic. MgAl-LDH@ZIF-8 has a high adsorption capacity over a wide pH range (3)(4)(5)(6)(7). Except for CO 3 2À , other coexisting ions (Cl À , SO 4 2À , and NO 3…”