Zn–Al Layered Double Hydroxides Synthesized on Aluminum Foams for Fluoride Removal from Water

Fluoride excess in water represents an environmental issue and a risk for human health since it can cause several diseases, such as fluorosis, osteoporosis, damage of the nervous system. Layered double hydroxides (LDHs) be exploited to remove this contaminant from by taking advantage their high ion-exchange capability. LDHs are generally mixed with polluted form powders, which then problem uneasy separation contaminated LDH sludge purified liquid. In work, Zn–Al films were directly grown situ on aluminum foams that acted both reactant substrate. This method enabled removal fluoride ions simple immersion, ensuing withdrawal foam de-contaminated water. Different synthesis methods types investigated improve adsorption process. The contact time, initial concentration, adsorbent dosage, pH studied parameters affect capacity efficiency. highest absorption efficiency approximately 70% was obtained using two separate growth after four hours, effectively reduced concentration 3 mg/L 1.1 mg/L, is below threshold value set WHO drinking