Improved Aqueous Lead Adsorption by Using Sand@MOF Composite

Among the most common pollutants in industrial effluents are various types of heavy metal pollutants that reducing the amount of them in water is necessary. Metal Organic frameworks (MOF) are among the porous materials that can be used to absorb heavy metals [۱,۲]. We report here a work in which a MOF with the formula of {[Ba۲(H۲btec)·H۲O]·۰.۵H۲O}n (btec is benzene-۱,۲,۴,۵-tetracarboxylic acid) was applied to absorb lead [۳]. In effect, the composite of this porous MOF with a sand sample containing silica which is also a porous material, has increasingly improved lead absorption. Many analytic methods including SEM, XRD, and FTIR were applied to characterize the composite and its constituents. However, XRD patterns of a) sand, b) MOF c) composite of sand and MOF illustrate the good formation of the composite. Investigating the concentration of lead in the initial solution compared with its concentration in the final solution after adsorption on sand, MOF and composite shows that Pb ion is adsorbed better on the composite with a meaningful difference.

کلیدواژه ها:

Ba-MOF ، Sand ، Composite ، Adsorption ، Lead