Utilisation of bauxite residue, the secondary material of alumina production, has been the object of numerous research efforts striving to introduce the by-product in useful applications. In fact, bauxite residue is used today in fabrication of ceramics, in cement production as a colouring agent and in abandoned quarries as a filling material. On the contrary, rare are the research initiatives ...

This study presents the magnesiothermic reduction of silica into silicon. process occurs at a lower reaction temperature than its carbothermal counterpart. Furthermore, was extracted from sugarcane bagasse ash via thermo-chemical treatment method using, for first time, L-cysteine chloride monohydrate and used as precursor in production silicon using reduction. The as-synthesized nanocrystalline...

An alyses of the components of municipal refuse were assembled, from which an average· composite analysis was calculated. The analyses of the flue and stack gases from 18 municipal incin erators were also tabu­ lated and plotted. A marked difference was n oted be­ tween the analyses of the stack gases and those to be expected from the combustion of the composite refuse. Much of the difference c...

Introduction: To establish the pharmacognostical and phytochemical standardization parameters of Pyrus pashia fruits in order to ensure quality and safety of this traditionally acclaimed medicinal tree. Methods: The fresh fruits of P. pashia were collected and dried. Fruit was subjected to various pharmacognostical investigations, Extraction procedures, and preliminary phytochemical screening, ...

Abstract Fly ash is the residue from burning coal in form of fine and light particles can be harmful to environment life. Whereas fly contains high silica so that it used as a precursor for zeolite blinding. Zeolite an adsorbent aquatic waste needs improved absorb more adsorbate. Therefore, necessary modify ash, such coating with manganese iron oxide. The made extraction synthesize using hydrot...

Bottom ash is the main solid residue (in weight) which is produced by municipal solid waste incineration (MSWI) facilities. To be reused in public works, it has to be stored previously a few months. This material is composed primarily of a mineral matrix but also contains unburnt organic matter. The mineral content and its change in the course of aging are relatively well-known, in contrast wit...

A study of sulfur-rich sludge (71.6% pyrite) dissolution at alkaline conditions (pH ca.9) was investigated using non-stirred and stirred flow-through experiments at room temperature (26 ± 1.2oC) and O2 partial pressure of 0.20 atm. The dissolution rate of pyrite-rich sludge was calculated based on the S release (aqueous SO4) at the steady-state. Results show that: (1) in the nonstirred reactor ...

Abstract Various means have been proposed to solve problems such as high ash content and complex composition in the recycling of nickel-containing residue produced by battery manufacturing enterprises. Microwave roasting pretreatment is improve nickel leaching rate from residue. The effect different experimental conditions like microwave temperatures, times, powers on was studied. It found that...