LAYERED EUROPIUM HYDROXIDE SYSTEM FOR PHOSPHOROUS SENSING AND REMEDIATION
Addressing the societal challenge “Climate action, environment, resource efficiency and raw materials”, we performed an experimental study of a dual-channel sensor towards anions formed by a LEuH material intercalated with 2,6-naphtalene dicarboxilate (LEuH-2,6-NDC). The sensor was tested with several biological relevant anions and the changes in NDC and europium emission intensities, upon excitation of NDC, were studied. Phosphate was found to have the highest degree of intercalation and displayed a strong increase (400%) on the fluorescence intensity of NDC. Intercalation of phosphate was further confirmed with Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES). Taking advantage of LEuH selectivity towards phosphate, its applicability in phosphorus remediation was studied presenting high sequestration capacity followed by controlled release of phosphate in three consecutive cycles and improved stability of the LEuH host material. These results highlight the significant potential of LLHs as new scavenging agents for inorganic phosphate.