however, the conventional gold recovery process is cyanidation, due to the recent environmental laws; researchers are looking for alternative methods for the recovery of gold. furthermore, the copper anode slime is one of the most important secondary sources of gold (about 1200 ppm). so, the main objective of the current work is gold separation from copper anode slime as a rich secondary source...

because of high cost of drilling and analysis of samples, it needs to predict gold and silvers based on pathfinder such as as, sb, cd, pb and zn and decrease the cost and time exploration project implementation. in this paper, the model based on a multilayer perceptron artificial neural network (mlp-ann) optimized by invasive weed optimization algorithm (iwo) to predict of gold and silver in za...

The main standard method for gold karat determination is the cupellation method. However, this method is not sufficiently accurate to determine gold karat in the presence of insoluble Platinum–Group Metals (PGMs), such as Ir, Ru, and Rh. In this study, for the first time, a complementary method that can be used coupled with the reference cupellation method is presented for the high...

The aim of this study is experimental assay of sensitivity and stability of a bimetallic silver/gold SPR sensor chip. This chip utilizes the sensitivity of the silver and the stability of the gold. Moreover, the Silver layer (instead of usual Cr or Ti layer) was used as an adhesive intermediate layer between the Gold layer and the glass substrate. The optimization of the Gold/Silver thickness u...

India has a long history of business and international trade that spans 4000 years, however, profiles ancient businessmen are rarely available to students help them visualize person environment an earlier era. This article short across many centuries based on texts, recent findings inscriptions other recorded history. The case stories will hopefully provide human faces understand the unique pra...

Executive Summary A three year research project was funded by the Minnesota Pork Producers Association to address the problems of odors, noxious gases and greenhouse gases produced in the popular deep pit curtain sided building. Several technologies were evaluated in pilot scale testing or laboratory testing while others were installed and monitored long term on full scale production facilities...

several methods have been developed for gold exploration in the past, among which biological base method is known to be the most efficient with least expenses. this method can also be used for latent gold prospects exploration. in the present study, the possibility of applying bacillus cereus frequency in soil as a biological marker was investigated for the exploration of latent gold prospectin...