AESLINA ABDUL KADIR, AHMAD SHAYUTI ABDUL RAHIM, IOAN GABRIEL SANDU, <br>MOHD MUSTAFA AL BAKRI ABDULLAH, ANDREI VICTOR SANDU<br>Leachate Characteristic of Mosaic Sludge Brick

AESLINA ABDUL KADIR, AHMAD SHAYUTI ABDUL RAHIM, IOAN GABRIEL SANDU,
MOHD MUSTAFA AL BAKRI ABDULLAH, ANDREI VICTOR SANDU
Leachate Characteristic of Mosaic Sludge Brick

Abstract:

Currently, the leachability of heavy metals is one of the issues that has become a main concern towards the environmental impact of the waste incorporation in building material. Mosaic sludge is one of the wastes that have been incorporated into fired clay bricks. In this research, investigation on two types of mosaic sludge have been used which are Bodymill sludge (BS) and Polishing sludge (PS). Mosaic sludge has contributed huge volume of waste to the landfill. During these studies, extraction and leachate of varies heavy metals such as Chromium (Cr), Copper (Cu), Lead (Pb), Cobalt (Co), Vanadium (V), Nickle (Ni), Zinc (Zn), Arsenic (As), Barium (Ba), Mercur y (Hg) and Cadmium (Cd) were carried out by using Method 1311,Toxicity Characteristic Leaching Procedure (TCLP), and method 1312, Synthetic Precipitation Leaching Procedure (SPLP). In this study, characteristics of raw materials were conducted by using X-Ray Florence Spectrometer (XRF). The analysis for all heavy metals were determined by using Atomic Absorption Spectroscopy (AAS), Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Mercury analyzer. This research study is focus on the toxic leachability of mosaic sludge after being incorporated into fired clay bricks and the results obtained were compared with United state environment protection agency (USEPA, 1996) and Environment Protection Agency Victoria (EPAV, 2005) permissible limit. Four different mixing ratios of mosaic sludge (1, 5, 10, 20 and 30%) were incorporated into fired clay brick and each brick was fired in a heat controlled furnace at elevated temperatures of 1050R”C. Heavy metals in mosaic sludge produced from BS and PS by XRF shows that the chemical composition and concentration of clay soil and mosaic sludge (BS and PS) obtained high value of Titanium oxide (TiO2), Manganese oxide (MnO), ferum oxide (Fe2O3), zinc (Zn), zirconium (Zr) and barium (Ba), which were more than 100ppm. The results obtained shows that both sludges can be incorporated up to 30% as the leachablity of heavy metals concentration were complied with the permissible limit to be classified as “non-hazardous material” according USEPA (1996) and EPAV (2005). Keywords: bricks, mosaic sludge, leachability, building material

Issue: 2016, Volume 67, Issue 5

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