The inevitable depletion of mineral resources, the constant deterioration of the geological and mining conditions for the development of mineral deposits and the restoration of raw materials from mining waste by recycling are all urgent problems we face today. The solution to this problem may ensure: a considerable extension of raw material source; decrease of investments in opening new deposit...

Water pollution caused by heavy metal ions has attracted worldwide attention. In this work, gold tailings were used as raw materials and the sol–gel method combined with atmospheric pressure drying to achieve low-cost preparation of a silica aerogel. (3-Aminopropyl) triethoxysilane (APTES), ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), chitosan modify aerogel, which was then an adso...

This paper may be of particular interest to the readers as it provides a new environmental risk assessment system for phosphogypsum tailing dams. In this paper, we studied the phosphogypsum tailing dams which include characteristics of the pollution source, environmental risk characteristics and evaluation requirements to identify the applicable environmental risk assessment methods. Two analyt...

E-tailing websites are often perceived to be static, impersonal and distant. However, with the movement of the World Wide Web to Web 2.0 in recent years, these online websites have been found to display personalities akin to ‘humanistic’ qualities and project impressions much like its retailing counterpart i.e. salespeople. This paper examines the personality of e-tailing websites and their imp...

First, concentrating on the seasonal (s = 52) lags, the ACF shows a strong peak at h = 1s and lesser, but still statistically significant peaks at h = 3s , 4s, 5s, and 7s. The PACF shows statistically significant peaks at only h = 1s. It appears that: • the ACF is cutting off after lag 1s and the PACF is tailing off in the seasonal lags • the ACF is cutting off after lags 3s, 4s, 5s, or 7s, and...

This study presents the novel idea of a cyanide-free leaching method, i.e., glycine-ammonia in presence permanganate, to treat low-grade and copper-bearing gold tailing. Ammonia played key role as pH modifier, lixiviant potential catalyst (as cupric ammine) this study. Replacing ammonia with other modifiers (i.e., sodium hydroxide or lime) made extractions infeasibly low (<30%). The increase...