Desalination of seawater using calcined hydrotalcite with different MG/AL ratio / Daiki Tsutsui and Takaaki Wajima

• Main Authors: Tsutsui, Daiki (Author), Wajima, Takaaki (Author)
• Format: Book
• Published: Universiti Teknologi MARA Cawangan Pulau Pinang, 2017-08.
• Subjects: Article; PeerReviewed
• Online Access: Link Metadata
• Notes: https://ir.uitm.edu.my/id/eprint/28776/1/AJ_DAIKI%20TSUTSUI%20EAJ%2017.pdf
• Keywords: T Technology (General); Technological change; Technological innovations

Salt damaged farmland increases in the world, and a novel method to capture salt in soil for avaiable use of agriculture is desired. In this study, we focused on calcined hydrotalcite as a desalination agent, and desalination properties of calcined hydrotalcite with different Mg/Al ratio from seawater was estimated. Calcined hydrotalcite with Mg/Al ratio of 1 - 6 was prepared, and the desalination ability were investigated using seawater collected from an Imari bay in Saga prefecture, Japan. In comparison, commercial hydrotalcite was done as the same procedure. As a resalt, the decrease of salinity was confirmed using all calcined hydrotalcites and the decreasing rates were almost same. The calcined hydrotalcite with approximately Mg/Al = 3.0 indicated the highest desalination property, due to the decrease of Na+ , Mg2+, Cl- and SO4 2- with addition of calcined hydrotalcite. The structure of calcined hydrotalcite returned to that of hydrotalcite by reconstruction reaction