Amang Zircon Sand from Onn Sdn. Bhd. mineral company has a high composition of zirconium at 61.63 wt% and low silicon 4.90 wt%. The in zircon sand indicates the possibility to synthesise it into zirconia. Zirconium was synthesised using alkali fusion method with different ratio NaOH/ZrSiO4 determine optimum based on yield. Alkali is coupled thermal treatment as will produce higher yield lower i...

We investigated the sulfuric acid resistance of low-calcium alkali-activated materials (i.e., geopolymers) supplemented with an iron mineral admixture hematite). Geopolymers without and 5% hematite were produced at two alkali contents (Na:Al = 0.86 1.39). Acid degradation reactions comprehensibly studied through three replenishes acid. Results demonstrate that is chemically active upon exposure...

Bacterial leaching is the extraction of metals from their ores using microorganisms. The most important player in the bioleaching process is. 4 Bacterial Attachment on Mineral Surfaces 200. 5 Microbial Diversity in Bioleaching Environments 200. Minerals are obtained using a leaching process.greater understanding of the mechanism of bacterial leaching of sulphide minerals. This latter process wh...

Upon rewetting, lichens lose polyols through leaching. We quantified leaching losses for 21 species under simulated rainfall. Polyol concentrations in these lichens range from 1.0 to 8.8%, with a mean of 2.8%. Leaching losses range up to about 7.5 mg (polyol)/g (lichen dry weight) in a typical rain event. The rate of polyol leaching declines exponentially, becoming negligible within 1 hour of c...

Slow pyrolysis is a promising technology to convert sewage sludge into char: stable solid product with high carbon and phosphorus content. However, due its heavy metals content, char use in agriculture avoided many European Union (EU) countries. This study aimed test solution, based on integrating slow chemical leaching, separate other inorganics from char, obtaining an inorganic P-rich fertili...

Abstract The treatment of tannery wastewaters is a complex task due to the complexity waste: mixture several pollutants, both anionic and cationic as well organic macromolecules which are very hard treat for disposal all together. Geopolymers class inorganic binders obtained by alkali activation aluminosilicate powders at room temperature. Such process leads cement like matrix that drastically ...