การวิเคราะห์โครงสร้างของซีโอไลต์ธรรมชาติและการประยุกต์ใช้ในการบำบัดแอมโมเนียในน้ำเสีย

Abstract

The natural zeolite, as an effective adsorbent derived from Songkhla province, was characterized by X-ray diffraction (XRD) and X-ray fluorescence (XRF) spectroscopy. The results reveal that the XRD pattern of the zeolite conesponds to the clinoptilolite compound with the molecular formula of (Na, K, Ca)uAluSi,oO,,.tBH,O. The XRF analysis shows the elemental compositions of the zeolite confirming the structural data obtained by the XRD method. Consecutively, the investigations of adsorption of ammonium contaminated in wastewater on the zeolite have been carried out. Wastewater samples from 2 frozen seafood factories in Songkhla province were collected. To measure ammonium contaminated in wastewater, the phenol-hypochlorite method was applied. The results show that the amounts of ammonium decrease and pH values increase after treatment with zeolite. The optimum adsorption time is 2 hours and the ratio of zeolite per water sample is 2gl100m1. Ammonium u'as removed from wastewater samples with the best removal efficiency of 78.79%. Consequently, the natural zeolite is successfully applicable for the removal in ammonium of wastewater from frozen seafood factories.