scholarly journals Enhancement Experiment on Cementitious Activity of Copper-Mine Tailings in a Geopolymer System

Fibers ◽  
2017 ◽  
Vol 5 (4) ◽  
pp. 47 ◽  
Author(s):  
Lin Yu ◽  
Zhen Zhang ◽  
Xiao Huang ◽  
Binquan Jiao ◽  
Dongwei Li
Keyword(s):  
Mine Tailings ◽  
Copper Mine ◽  
Copper Mine Tailings ◽  
Cementitious Activity

scholarly journals Enhancement Experiment on Cementitious Activity of Copper Mine Tailings in Geopolymer System

2017 ◽  
Author(s):  
Lin Yu ◽  
Zhen Zhang ◽  
Xiao Huang ◽  
Binquan Jiao ◽  
Dongwei Li
Keyword(s):  
Mine Tailings ◽  
Thermal Activation ◽  
Activity Index ◽  
Mechanical Grinding ◽  
Copper Mine ◽  
Copper Mine Tailings ◽  
Alkali Leaching ◽  
Ir Analysis ◽  
Cementitious Activity ◽  
Copper Ores

Copper mine tailings are the residual products after the purification of precious copper from copper ores, and their storage can create numerous environmental problems. Many researchers have used copper mine tailings for preparation of geopolymer. This paper studies the enhancement of the cementitious activity of copper mine tailings in geopolymer system. First, copper mine tailings are activated through a mechanical grinding activation. Afterward, the mechanically activated copper mine tailings are further processed through thermal activation and alkaline roasting activating. The cementitious activity index of copper mine tailings is characterized through the degree of concentration of alkali leaching silicon and aluminum. It was observed that the Si and Al alkali leaching concentration of mechanical activated tailings was increased by 26.03% and 93.33%, respectively. The concentration of Si and Al was increased by 54.19% and 119.92%, respectively. For alkaline roasting activating, roasting time, temperature and (C/N ratio) were evaluated through the orthogonal test, and the best condition was activation for 120 min at 600℃ with C/N ratio is 5:1. In this study, the SEM, XRD and IR analysis show that mechanically activation, thermal activation and alkaline roasting activating can improve the cementitious activity index of copper mine tailings.

scholarly journals Semiarid bunchgrasses accumulate molybdenum on alkaline copper mine tailings: assessing phytostabilization in the greenhouse

2021 ◽  
Vol 3 (8) ◽  
Author(s):  
Paul M. Antonelli ◽  
Matthew G. Coghill ◽  
Wendy C. Gardner ◽  
Lauchlan H. Fraser
Keyword(s):  
Mine Tailings ◽  
Soil Amendments ◽  
Block Design ◽  
Wood Chip ◽  
Biomass Accumulation ◽  
Shoot Biomass ◽  
Tissue Samples ◽  
Copper Mine ◽  
Copper Mine Tailings ◽  
Randomized Complete Block Design

AbstractPhytostabilization is the use of plants and soil amendments to physically stabilize and remediate contaminated mine wastes and to control wind and water erosion in semiarid environments. The aim of this study was to evaluate two native bunchgrass species’ (Pseudoroegneria spicata and Festuca campestris) biomass accumulation and metals uptake response to locally available soil amendments (compost, wood ash and wood chips) to determine their suitability for phytostabilization at an alkaline copper mine tailings site in British Columbia, Canada. In the greenhouse, bunchgrasses important as forage for livestock and wildlife were grown in tailings with various ash–compost–wood chip combinations and evaluated using a randomized complete block design with 13 treatments and 10 replicates. Plants were harvested after 90 d, and tissues were analyzed for root and shoot biomass. Tissue samples (n = 3) from three treatment subsets (ash, compost, blend) were selected for elemental analysis. Biomass increased with increasing compost applications, and the response was greatest for P. spicata. Shoot molybdenum exceeded the maximum tolerable level for cattle and was significantly higher when grasses were grown on the ash treatment (183–202 mg kg−1) compared to the others (19.7–58.3 mg kg−1). Translocation and root bioconcentration factors were highest on the ash treatment (2.53–12.5 and 1.75–7.96, respectively) compared to the other treatments (0.41–3.43 and 1.47–4.79, respectively) and indicate that both species are ‘accumulators.’ The findings suggest that these bunchgrasses were not ideal candidates for phytostabilization due to high shoot tissue molybdenum accumulation, but provide important considerations for mine restoration in semiarid grassland systems.

Rehabilitation of Copper Mine Tailings at Zhong Tiao Shan and Tong Ling, China

2018 ◽  
pp. 111-121
Author(s):  
L.B. Zhou ◽  
R. van de Graaff ◽  
H.W. Dai ◽  
Y.J. Wu ◽  
L.N. Wall
Keyword(s):  
Mine Tailings ◽  
Copper Mine ◽  
Copper Mine Tailings

Electrokinetic remediation of manganese and zinc in copper mine tailings

2019 ◽  
Vol 365 ◽  
pp. 905-911 ◽  
Author(s):  
Rodrigo Ortiz-Soto ◽  
Daniela Leal ◽  
Claudia Gutierrez ◽  
Alvaro Aracena ◽  
Adrian Rojo ◽  
...  
Keyword(s):  
Mine Tailings ◽  
Electrokinetic Remediation ◽  
Copper Mine ◽  
Copper Mine Tailings

Potentials of steel slag and copper mine tailings as construction materials

2014 ◽  
Vol 18 (sup6) ◽  
pp. S6-250-S6-254 ◽  
Author(s):  
E. A. Oluwasola ◽  
M. R. Hainin ◽  
M. M. A. Aziz ◽  
H. Yaacob ◽  
M. N. M. Warid
Keyword(s):  
Mine Tailings ◽  
Steel Slag ◽  
Construction Materials ◽  
Copper Mine ◽  
Copper Mine Tailings

Grassland reclamation of a copper mine tailings facility: Long term effects of biosolids on plant community responses

2021 ◽  
Author(s):  
Alyson Gagnon ◽  
Laura W. Ploughe ◽  
Michelle P. Harris ◽  
Wendy C. Gardner ◽  
Thomas Pypker ◽  
...  
Keyword(s):  
Plant Community ◽  
Mine Tailings ◽  
Long Term Effects ◽  
Community Responses ◽  
Copper Mine ◽  
Copper Mine Tailings
Sign in / Sign up

Export Citation Format

Share Document