Paper Title
Chloride and Sulfatewashing from Municipal Solid Waste Fly Ash

Abstract
Municipal solid waste fly ash (MSWI FA) is the waste from waste-to-energy power plant and usually used with cement because it has large amount of calcium (32.1%), and cement can cap hazardous element. However, MSWI FA has high amount of chloride (29.3%) and sulfate (4.03%) causing the corrosion and low compressive strength. The aim of this research is to study chloride and sulfate removal by deionized water, nitric acid, and sodium carbonate. Fly ash and leached water are characterized after washing. The results indicate that 0.25M sodium carbonate leaches highest sulfate twice as much as deionized water. Conversely, different washing solutions do not have effect on chloride removal. Keywords – Fly ash, Water washing, Acid-base washing, Chemical property improvement