Mesoporous silica materials such as SBA-15, MCM-41, KIT-6, and MCM-48 have been synthesized by an ultrasound-modified sol-gel method. The obtained silica materials could be obtained in a short time and are of different pore sizes and shapes, and may be used in various fields due to their large internal surface area and uniformity of poresize. These features actually increase the applicationfeasibility of mesoporous silica materials for separation and removal operations. Thus, the resulted materials were characterized and their textural, structural and morphological properties were investigated. In order to test the application feasibility of the synthesized materials in removal operations, the adsorption of water vapor was investigated by using a gravimetric system. Due to the presence of silanol groups on their surface, as well as mesopore structure, a large amount of water can be adsorbed on these ultrasound-derived mesoporous silicas, because their mesopores are suitable for capillary condensation. The obtained data were compared with the data reported in literature and further the synthesized materials were tested in water vapor uptake from the airsaturated with moisture. Additionally, the water removal property of the synthesized silica materials were compared with the same main property of commercially available silica gel, with the view to be used as desiccants.