Chemical Modification of Groundwater Sediment for Removal of Hydrogen Sulfide

Abstract

Thisresearch was aimed to modify of natural groundwater sediment obtained from Pasao, Uttaradit province, Thailand,for removal of hydrogen sulfide. The modification process wasprovided by adding natural groundwater sediment into 1.0 M NaOHsolution with stirring for 30 min.The suspension was filtered and calcined at 800 o C for 1 h. The natural and modified groundwater sedimentswere investigated by X–ray fluorescence spectrometry (XRF) and X–ray diffraction (XRD). From the results, natural and modified groundwater sediments can be indexed to the mixed phase of hematite(α–Fe2O3) and silica (SiO2). The highercrystallinity of α–Fe2O3 was produced after the modification process. For the application, the removal of hydrogen sulfide by natural and modified groundwater sedimentswere investigated. It was found that modified groundwater sediment hashigherefficiency for removal of hydrogen sulfide than natural groundwater sediment.