There are over 3,000 sites across the United States contaminated wtth lead. Techniques to remediate these sites include standard stabilization/disposal technologies, reclamation of lead using secondary lead smelters, soil washing, and biological removal technologies. Through a Cooperative Agreement with the U.S. Environmental Protection Agency’s Risk Reduction Engineering B secondary Laboratory...

Abstract A systematic study on the microstructure evolution and kinetics analysis of PbO–SiO 2 slag reduction using hydrogen was conducted. The carried out pellets (70 wt pct PbO–30 SiO ; or 38.6 mol PbO 61.4 ) 15 pctH /85 pctN gas, with a flowrate 500mL/min for various reaction time (30 minutes to 3 hours) isothermally at 300 °C 700 °C. mechanism were assessed by measuring weight loss over app...

The objective of this study was to determine the chemical, radiological and leaching properties of slag and ash produced by a thermoelectric unit of a former factory Adriavinil and deposited in the area of Kasktel Gomilica near Split, Croatia. A total of 33 samples were analysed. The bioavailable fraction of the slag and ash was estimated using different leaching tests. The waste material was c...

A common feature shared by all pyrometallurgical smelting processes is the production of slag. Slag is usually a byproduct of metal production, although there are processes (such as ilmenite smelting, for example) where the slag is the principal product. Most slags contain a significant amount of heavy metals, the release of which can cause environmental problems. However, the recovery of these...

This study aims to investigate the activating effect of Na2CO3 and NaOH on the workability and mechanic strength of slag-based alkali activated materials with different alkali contents and water to binder ratios. The heat release during the reaction process of slag activated with sodium carbonate and sodium hydroxide were monitored respectively to analyze the hydration process. Meanwhile, the w...

Microwave technique were used to investigate the early hydration of slag cement with different slag percentages, different activators and different amount of activator. It is found that higher slag cement causes a higher dielectric constant E and a shorter induction period. But higher slag cement samples have very different electrical conductivity (3 compared with that of pure cement, their o c...

V. P. Karasyov, P. V. Kovalev, A. Z. Issagulov, V. Yu. Kulikov, Y. P. Chsherbakova. Saint-Petersburg State Polytechnic University, SaintPetersburg, Russia, Karaganda State Technical University, Karaganda, Kazakhstan There is considered the power operating mode of a high-power arc steelmaking furnaces (ASMF) in the period of the flat bath. It is revealed that electric energy is mainly spent for ...

One purpose of this article is to draw attention to the seminal work of J. Mealy in 1989 on calibrations in semi-riemannian geometry where split SLAG geometry was first introduced. The natural setting is provided by doing geometry with the complex numbers C replaced by the double numbers D, where i with i = −1 is replaced by τ with τ = 1. A rather surprising amount of complex geometry carries o...

Chromium pollution has been historically widespread throughout the world. Most available remediation technologies often require energy consumption. This study is aimed to develop electrochemical remediation for Cr(VI) in chromium-slag leakage with self-generated electricity. Dynamic leaching experiments of chromium-slag samples were conducted to survey the release and leaching behavior of Cr(VI...