most of electricity is generated by thermal power plants in iran. shahid rajaee thermal power plant consists of four 250mw natural gas and fuel oil burning units that is located at 100 km west off tehran. as a result of fuel oil burning in winter time, boilers air heaters are washed and cleaned frequently. the wastewater originating from air heater washing contains suspended solids and differen...

In this paper, a series of equilibrium and kinetic experiments Hg(II) removal in single-stage batch reactor on natural (NZ) sulfur-impregnated zeolite (SZ) were performed. Batch sorption zeolites was studied using different isothermal models. It found to be best described by the Brouers-Sotolongo isotherm Vermeulen’s approximation, which applied optimizing mass contact time two-stage cross-curr...

The shortage of waste landfill space for waste disposal and the high demand for fill materials for land reclamation projects in Singapore have prompted a study on the feasibility of using spent copper slag as fill material in land reclamation. The physical and geotechnical properties of the spent copper slag were first assessed by laboratory tests, including hydraulic conductivity and shear str...

A comparative technical and environmental evaluation of products arising from the stabilization/solidification of secondary lead metallurgical slag into a cement matrix was performed. Provided samples of an industrial slag generated in the process of recovery of lead from automotive batteries (Engitec CX process), were used in experimental work. Characterization of slag by X-ray Diffraction (XR...

Two polymeric resins, Polymal and Hetron, were evaluated to solidify/stabilize (S/S) for ultimate disposal brake lining dust containing asbestos. This dust was generated as part of a sequence of processing steps in the manufacture of automobile brake linings. The mean grain size of the lining dust for disposal was 298.2 m m, the range being from 24.9 to 567.3 m m. Based on the Toxicity Characte...

This study investigated a strategy of blending lead-laden sludge and Al-rich precursors to reduce the release of metals from the stabilized products. Using PbO as the simulated lead-laden sludge to sinter with γ-Al2O3 by Pb:Al molar ratios of 1:2 and 1:12, PbAl2O4 and PbAl12O19 were formed as final products during the sintering process, respectively. By firing the PbO + γ-Al2O3 mixtures with di...

This study aims to examine the influence of untreated coal waste (UCW) and treated (TCW) as supplementary cementitious materials (SCMs) on environmental, mechanical, durability, microstructural characteristics mortar mixes. UCW preparation procedure consists sequential steps crushing grinding. Afterward, is thermally activated through incinerating at 750 °C be promoted TCW. Experimental work in...

Abstract In this study, the production of indoor humidity-buffering coatings (IHC-s) from recycling waste silica sludges by using a room-temperature sol-gel method which is simple and energy-efficient route reported. The properties these IHC-s are identified scanning electron microscope, X-ray diffraction, fluorescence spectrometer, laser particle size analyzer, N 2 adsorption-desorption isothe...

Lumpur yang dihasilkan dari instalasi pengolahan air minum di Indonesia masih belum dimanfaatkan dengan baik dan menjadi permasalahan bagi lingkungan. Salah satu alternatif dapat diterapkan yaitu memanfaatkan lumpur tersebut sebagai bahan baku paving block. Penelitian ini bertujuan untuk menganalisa perbandingan limbah hasil uji daya serap air, kekuatan Toxicity Characteristic Leaching Procedur...