A Study of Microstructure of Steel Slags Used for Pollutants Adsorption and Removal in Waste Water

Abstract

Abstract: "Waste treatments waste" – the reuse of waste could bring a number of environmental and economical benefits such as reducing waste and treatment cost in many industrial sectors. This study made use of steel slag as treatment material for polluted waste. High performance of fill teration may come with the parameters of volumetric mass density of steel slag is 3.1 ~ 3.6 g/cm³, standard screen is 0.175 mm, weight density powder is about 0.174g/cm³, surface is about 0.32 m²/g, average size is 5.3 nm. Chemical components of steel slag analyzed by XRF (X-ray fluorescence spectrometer), which shows CaO is the main component of steel slag, 48.2% and 42.5% were steel slag and steel slag powder, respectively. The following major components are Fe₂O₃ and MgO content. Metals content determined by TCLP (Toxicity Characteristic Leaching Procedure) that shows Pb, Hg, Cd, Cr, As, Ni, Cu, Mn, Zn content which is less than National Standard II (GB 3838-2002); structure of steel slag analyzed by SEM (Scanning Electron Spectroscopy) and XRD (X-Ray diffraction) which shows include magnetite, tri-calcium silicate (Ca₃S), di-calcium silicate (Ca₂S), and iron in tin (FeO). Arsenic absorption and removal by steel slag are simple and possibly experimental and that can apply in large-scale so any effective from that point efficient.

Keywords: Waste treatment waste, steel slag, toxic, wastewater, absorption.

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