EFFECT OF ALUMINA AND THIOL'S ROLES FOR Hg2+ ADSORPTION IN WASTEWATER – A SHORT REVIEW

Abstract

The issue of mercury (Hg2+) existing in water supplies has been brought up since it has an impact on both people and the environment. The ideal method for removing Hg2+ is adsorption since it is easy to use, highly effective, and economical. Alumina composite and thiols are two probable substances that have been used to remove Hg2+ from wastewater, but it is still unclear how these substances work when it comes to adsorbing the metal. In order to observe the present method of removing Hg2+ from wastewater, this review has been undertaken. This study examined the characteristics, processes, and qualities of two different types of adsorbents: alumina and thiol. There are numerous phases of alumina, and each has distinct properties. The characteristics of alumina at various temperatures, levels of porosity, and surface area, as well as its primary identification as a Hg2+ adsorbent by the bonding of Al-Hg in XPS, XRD, and TEM, are described. Additionally, through imaging and bonding confirmation of S-Hg utilising FE-SEM, FTIR, and XPS, the function of thiol as a soft base and the major characterization as a Hg2+ adsorbent is demonstrated. This study shows that alumina's gamma phase is widely employed as a composite material while thiol, with its functional group, -SH, is the most efficient substance for capturing Hg2+. Due to the characteristics of each, alumina and thiol have the ability to bond with Hg2+. For future reference, this review paper emphasises the importance of alumina and thiol as adsorbents for Hg2+ removal.