Basic ferroalloys are some of the most important ingredients for producing carbon and special steel (using ferrochrome and other special ferroalloys). The market of basic ferroalloys is somehow independent of other raw materials markets, depending mostly of steel. There are sometimes speculative...

Chromium metal has unique properties and therefore finds large number of applications in industries like chrome-plating, steel and alloy, leather tanning and ammunition factories. These industries consequently, discharge large quantities of hexavalent chromium (Cr6 ) containing effluents. Since...

Governments may decide to control the export of unprocessed raw materials hoping that this will promote local downstream industries. There is scant empirical examination of the actual outcomes of such policies put in place. This paper describes use of export control measures by four...

Basic ferro-alloys are some of the most important ingredients for producing carbon and special steel (using ferrochrome). The market of basic ferro-alloys is somehow independent of other raw materials markets, depending mostly of steel. There are sometimes speculative operations, but they do not...

A novel Cr-methanol fuel cell was designed to remove Cr(VI) with simultaneous electricity production. In this design, methanol was oxidized on anode, while Cr(VI) was reduced on cathode. With 2molL−1 sodium hydroxide as anolyte and 0.1molL−1 sodium sulfate as catholyte, the power density...

The effects of applied electric charge (0-200 Amp-min) and pH on the removal of colour and COD from textile wastewater have been analysed. Mild steel plates have been used as electrodes in both parallel and series connections. For colour and COD removal, four electrodes each with a surface area...

This paper discusses concentrations of 7 essential trace metals (chromium,cadmium, copper, lead,nickel, manganese and zinc) in water, sediment and freshwater fish (Clarias. gariepinus) tissues from Oke-Afa Canal, Lagos Nigeria The sampling and analysis of the samples from Oke Afa canal were...

Barriers to trade come in a variety of forms. This paper examines one such barrier, export restrictions, and how it impacts trade and global supply in selected strategic metals and minerals. The metals and minerals examined in the paper are of particular interest for a number of reasons: they...

Two feasibility studies using the earthworm (Eisenia fetida) and vermicompost in the processing and remediation of solid and liquid wastes with high metal content are presented: vermicompost as adsorbent substrate for remediation of wastewaters contaminated with metals; earthworms for...

A green-coloured phyllosilicate occurring on the walls of amygdaloidal cavities and along fractures in the Deccan Flood basalts at Killari, Maharashtra, India, has been identified as iron-rich saponite with a chemical composition [Na<Subscript>0.60</Subscript> K<Subscript>0.40</Subscript> Ca<Subscript>0.47</Subscript>] {Mg<Subscript>2.05</Subscript>Fe<Subscript>3.95</Subscript>} (Si<Subscript>6.45</Subscript>Al<Subscript>1.55</Subscript>) O<Subscript>20</Subscript>(OH)<Subscript>4</Subscript>. In...</subscript></subscript></subscript></subscript></subscript></subscript></subscript></subscript></subscript>

A zero emission process was established by treatment of a spent liquor resulting from frequent pickling of copper alloy rods in sulfuric acid. The spent liquor contains 35 g l−1 copper, 25 g l−1 zinc, 1.1 g l−1 chromium, 45 g l−1 sulfuric acid, and 135 g l−1 total sulfate. These...

Unternehmenskonzentrationen im Weltbergbau warfen die Frage auf, ob die bisher problemlose Rohstoffversorgung der deutschen Wirtschaft über die Weltmärkte und ohne wesentliche eigene Rohstoffengagements im Ausland gefährdet werden könnte. In der Studie werden die Märkte von zehn...