Simulating and predicting drainage quality of mine tailings impoundments

2010 ◽  
Author(s):  
Kaixuan Tan ◽  
Jiang Liu ◽  
Huiqiong Qu ◽  
Chunguang Li ◽  
Yongxiang Huang
Keyword(s):  
Mine Tailings ◽  
Tailings Impoundments

scholarly journals Assessment of Native and Endemic Chilean Plants for Removal of Cu, Mo and Pb from Mine Tailings

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1020
Author(s):  
Pamela Lazo ◽  
Andrea Lazo
Keyword(s):  
Removal Efficiency ◽  
Mine Tailings ◽  
Environmentally Friendly ◽  
Growth Period ◽  
Ex Situ ◽  
Water Requirements ◽  
Tailings Impoundments ◽  
Removal Efficiencies ◽  
Solidago Chilensis ◽  
Translocation Factors

In Chile, 85% of tailings impoundments are inactive or abandoned and many of them do not have a program of treatment or afforestation. The phytoremediation of tailings with Oxalis gigantea, Cistanthe grandiflora, Puya berteroniana and Solidago chilensis have been tested in order to find plants with ornamental value and low water requirements, which enable reductions in molybdenum (Mo), copper (Cu) or lead (Pb) concentrations creating an environmentally friendly surrounding. Ex-situ phytoremediation experiments were carried out for seven months and Mo, Cu and Pb were measured at the beginning and at the end of the growth period. The capacity of these species to phyto-remedy was evaluated using the bioconcentration and translocation factors, along with assessing removal efficiency. Solidago chilensis showed the ability to phytoextract Mo while Puya berteroniana showed potential for Cu and Mo stabilization. The highest removal efficiencies were obtained for Mo, followed by Cu and Pb. The maximum values of removal efficiency for Mo, Cu and Pb were 28.7% with Solidago chilensis, 15.6% with Puya berteroniana and 8.8% with Cistanthe grandiflora, respectively. Therefore, the most noticeable results were obtained with Solidago chilensis for phytoextraction of Mo.

scholarly journals Recycling and Application of Mine Tailings in Alkali-Activated Cements and Mortars—Strength Development and Environmental Assessment

2020 ◽  
Vol 10 (6) ◽  
pp. 2084 ◽  
Author(s):  
Nuno Cristelo ◽  
João Coelho ◽  
Mafalda Oliveira ◽  
Nilo Cesar Consoli ◽  
Ángel Palomo ◽  
...  
Keyword(s):  
Mine Tailings ◽  
Sodium Intake ◽  
Sodium Sulphate ◽  
Strength Development ◽  
Strength Increase ◽  
Fine Aggregate ◽  
Reaction Products ◽  
X Ray ◽  
Alkali Activated

Mine tailings (MT) could represent a step forward in terms of the quality of the aggregates usually used in civil engineering applications, mostly due to its high density. The Portuguese Neves Corvo copper mine, owned by the Lundin Mining Corporation, produces approximately 3 million tonnes per year. Nevertheless, it cannot be used in its original state, due to its high levels of sulphur and other metals (As, Cr, Cu, Pb, Zn). This paper focuses on the stabilisation/solidification of high-sulphur MT, without any previous thermal treatment, using alkali-activated fly ash (FA). The variables considered were the MT/FA ratio and the activator type and concentration. A fine aggregate was then added to the pastes to assess the quality of the resulting mortar. Maximum compressive strengths of 14 MPa and 24 MPa were obtained for the pastes and mortars, respectively, after curing for 24 h at 85 °C. Thermogravimetric analysis, scanning electron microscopy, X-ray energy dispersive spectroscopy, X-ray diffraction, and infrared spectroscopy were used to characterize the reaction products, and two types of leaching tests were performed to assess the environmental performance. The results showed that the strength increase is related with the formation of a N-A-S-H gel, although sodium sulphate carbonate was also developed, suggesting that the total sodium intake could be optimized without strength loss. The solubility of the analysed metals in the paste with 78% MT and 22% FA was below the threshold for non-hazardous waste.

Modeling and predicting of drainage quality for sulfide mine tailings impoundments

2006 ◽  
Vol 25 (S1) ◽  
pp. 28-29
Author(s):  
Kaixuan Tan ◽  
Zhwngji Yi ◽  
Aili Tan ◽  
Liangshu Xia
Keyword(s):  
Mine Tailings ◽  
Tailings Impoundments
Sign in / Sign up

Export Citation Format

Share Document