Heavy metals leaching in bricks made from lead and zinc mine tailings with varied chemical components

Li, Chong; Wen, Qingjuan; Hong, Mingzhu; Liang, Zhiyu; Zhuang, Zanyong; Yu, Yan

doi:10.1016/j.conbuildmat.2016.12.076

Cited by 41 publications

(14 citation statements)

References 30 publications

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“…The discovered fluctuations in the concentrations of saponite in the bottom sediments of the pond part in the range up to 70% can be explained by the uneven composition of the kimberlite extracted at the Arkhangelskaya and Karpinskogo-1 pipes; saponite content in suspension is up to 90%. The environmental safety and compliance of the wastes are the primary parameters determining the slurry reutilization prospects, as mining and processing impact is fraught with the land pollution issues that are to be abated [55,56]. In this context, we studied the content of potentially toxic elements in five averaged samples of the aqueous suspension (gel) from the pond zone.…”

Section: Composition Of the Diamond Clay Tailingsmentioning

confidence: 99%

Reutilization Prospects of Diamond Clay Tailings at the Lomonosov Mine, Northwestern Russia

Пашкевич

Alekseenko

2020

Minerals

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Approaches to reutilization of diamond clay tailings in northern environments are considered in the example of the Subarctic region of Russia. The monitoring studies are conducted at storage facilities of Severalmaz PJSC where ca. 14 million cubic meters of waste rock are produced annually after kimberlite mining and processing. The tailings of diamond ore dressing waste are situated in complex geological conditions of high-groundwater influx and harsh cold climate with low levels of solar radiation and the average annual temperature below freezing point. Furthermore, the adjoining protected forests with a significant diversity of biogeocenoses and salmon-spawning rivers are affected by the storage area. Reducing the impact of the tailings can be achieved through the reuse of the stored clay magnesia rocks obtained from saponite-containing suspension. The experiments reveal the most promising ways of their application as potential secondary mineral raw materials: cement clinker and ceramics manufacture, integration of alkaline clay into the reclamation of acidic peat bogs, and production of aqueous clay-based drilling fluid. Field and laboratory tests expose the advantages and prospects of each suggested treatment technique.

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Section: Composition Of the Diamond Clay Tailingsmentioning

confidence: 99%

Reutilization Prospects of Diamond Clay Tailings at the Lomonosov Mine, Northwestern Russia

Пашкевич

Alekseenko

2020

Minerals

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“…In terms of leaching, the effectiveness in reducing the leachability of Ba 2+ , Cd 2+ , Cu 2+ , Ni 2+ and Pb 2+ was shown to be easy for natural zeolite-blended cement pastes [29]. Metals in cement were shown to be leachable in various media, in the descending order of Cu 2+ , Cd 2+ , Pb 2+ , Zn 2+ , Mn 2+ and Sb 3 , but were not leached in simulated seawater, groundwater or acid rain [30].…”

Section: Introductionmentioning

confidence: 98%

Potential Effect of Porosity Evolution of Cemented Paste Backfill on Selective Solidification of Heavy Metal Ions

Yang

Zhao

Jiao

et al. 2020

IJERPH

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Cemented paste backfill (CPB) is a common environmentally friendly mining approach. However, it remains undetermined whether CPB pollutes underground mine water. Tank leaching analysis of a CPB mass in distilled water was performed for 120 d, and water quality was tested in situ for a long-term pollution assessment. Computerized tomography was also used to determine the CPB micro-pore structure and ion-leaching mechanism. The dissolved Zn2+, Pb2+ and As5+ concentrations in the leachate peaked at 0.56, 0.11 and 0.066 mg/L, respectively, whereas the Co2+ and Cd2+ concentrations were lower than the detection limit. The CPB porosity decreased from 46.07% to 40.88% by soaking, and 80% of the pore diameters were less than 13.81 μm. The permeability decreased from 0.8 to 0.5 cm/s, and the quantity, length, and diameter of the permeate channels decreased with soaking. An in-situ survey showed novel selective solidification. The Zn2+ concentration in the mine water was 10–20 times that of the background water, and the Pb2+ concentration was 2–4 times the regulated value. Although the Pb2+ content decreased significantly with mining depth, there remains a serious environmental risk. Mine water pollution can be reduced by adding a solidifying agent for Pb2+ and Zn2+, during CPB preparation.

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“…A lot of research focuses on the applicability of metals recovery by reprocessing tailings [10,11], but it cannot dramatically reduce the storage amount of tailings after metals are recovered [12]. The overall utilization of reduced storage amount of tailings has become the focus of research as construction materials, for instance it is used in brick [13,14], autoclaved aerated concrete [15,16], ceramics [17], glass [18], and geopolymers/alkali-activated materials [19], et al…”

Section: Introductionmentioning

confidence: 99%

Utilization of tailings in cement and concrete: A review

Gou

Zhou

Then

2019

Science and Engineering of Composite Materials

147

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One of the advantages of cement and the cement concrete industry in sustainability is the ability to utilize large amounts of industrial solid wastes such as fly ash and ground granulated blast furnace slag. Tailings are solid wastes of the ore beneficiation process in the extractive industry and are available in huge amounts in some countries. This paper reviews the potential utilization of tailings as a replacement for fine aggregates, as supplementary cementitious materials (SCMs) in mortar or concrete, and in the production of cement clinker. It was shown in previous research that while tailings had been used as a replacement for both fine aggregate and cement, the workability of mortar or concrete reduced. Also, at a constant water to cement ratio, the compressive strength of concrete increased with the tailings as fine aggregate. However, the compressive strength of concrete decreased as the replacement content of the tailings as SCMs increased, even whentailings were ground into smaller particles. Not much research has been dedicated to the durability of concrete with tailings, but it is beneficial for heavy metals in tailings to stabilize/solidify in concrete. The clinker can be produced by using the tailings, even if the tailings have a low SiO2 content. As a result, the utilization of tailings in cement and concrete will be good for the environment both in the solid waste processing and virgin materials using in the construction industry.

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Heavy metals leaching in bricks made from lead and zinc mine tailings with varied chemical components

Cited by 41 publications

References 30 publications

Reutilization Prospects of Diamond Clay Tailings at the Lomonosov Mine, Northwestern Russia

Reutilization Prospects of Diamond Clay Tailings at the Lomonosov Mine, Northwestern Russia

Potential Effect of Porosity Evolution of Cemented Paste Backfill on Selective Solidification of Heavy Metal Ions

Utilization of tailings in cement and concrete: A review

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