Purification of sphalerite concentrate in the chemical and flotation way
In this paper the results of the investigation of magnesium removal, from zinc concentrate derived from zinc-lead ore enrichment plant, have been presented. The characteristics of the initial concentrate and the occurrence forms of dolomite in this material are estimated. It was found that magnesium is collected in the finest fraction of the initial material. The influence of chemical treatment and flotation on the quality improvement of zinc concentrate is determined. This method permits to obtain zinc concentrate containing below 0,3% Mg and about 0,7% Ca.
This research emphasizes eloquently on membrane technology for treatment of palm oil mill effluent (POME) as it is the Malaysia’s largest and most important agro based industry. Findings established significant quality improvement with an efficient recovery of water from palm oil mill via innovative membrane application. Conventional bio-methods, whilst adhering to the Department of Environment’s (DOE) discharge regulations, produces brownish liquid which pales in comparison to the crystal clear water obtained through membrane treatment. The pre-treatment process consists of coagulation-flocculation using green environmental coagulant bases such as Moringa oleifera (MO) seeds. The ultrafiltration polyvinylidene difluoride (PVDF) and thin film composite (TFC) reverse osmosis were vital for the membrane processes. The system gave 99% suspended solids reduction in suspended solid and 78% of water present was successfully recovered. This technology guarantees water recovery with drinking water quality; meeting the US Environmental Protection Agency (USEPA) standard or could be recycled into the plant with sludge utilization for palm oil estates, thus enabling the concept of zero discharge to be executed in the industries. In addition, green and healthy antioxidants such as oil and beta-carotene can be recovered from POME further demonstrate. Silica gel showed better performance in separation of carotenes from oil at temperature 40°C using adsorption chromatography with 1154.55 ppm. The attractiveness of this technology, enabling the utilization of reuse of agricultural waste into potentially value added products.
Katarína Hroboňová, Andrea Špačková and Martina Ondáková
pharmacological activity. Eur. J. Clin. Exp. Med. 15: 169-175.
Liberatore MT, Pati S, Del Nobile MA, La Notte E (2010) Aroma qualityimprovement of Chardonnay white wine by fermentation and ageing in barrique on lees. Food Res. Int. 43: 996-1002.
Lorrain B, Ky K, Pechamat L, Teissedre PL (2013) Evolution of analysis of polyhenols from grapes, wines, and extracts. Molecules 18: 1076-1100.
Machyňáková A, Lhotská I, Hroboňová K, Šatínský D (2017a) On-line coupling of molecularly imprinted solid-phase extraction with liquid chromatography for the fast