Overview on the Treatment Technology of Wastewater from Copper Mineral Processing (WCMP)

During the exploitation and utilization of the mineral resources, varieties of pollutants have been produced, which would impact the natural environment inevitably and bring many adverse effects to ecological environment and the human health. Its worth noting that the wastewater from copper mineral processing (WCMP) is one of the main source of mine environmental pollution. The WCMP is characterized by large quantity and containing large numbers of suspended solids, residual flotation reagents and heavy metals, etc. Wastewater can be discharged and realized reuse only after effective treatment. Recently, natural sedimentation, neutralization, flocculation, oxidation and other treatment techniques by wastes are the commonly used methods to treat the mineral processing wastewater.

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Advances in mineral processing technologies related to iron, magnesium, and lithium

Reviews in Chemical Engineering ◽

10.1515/revce-2017-0053 ◽

2019 ◽

Vol 36 (1) ◽

pp. 107-146

Author(s):

Chaoquan Hu ◽

Yufei He ◽

Dongfan Liu ◽

Shuying Sun ◽

Dianqing Li ◽

...

Keyword(s):

Raw Materials ◽

Mineral Resources ◽

Functional Materials ◽

Mineral Processing ◽

Vital Role ◽

Western China ◽

Low Grade ◽

Processing Technologies ◽

Exploitation And Utilization ◽

Economic Developments

Abstract Exploitation and utilization of mineral resources have played a vital role in China’s rapid economic developments. Although the history of mineral processing is quite long, technologies in this field have varied with the changes of market demands. This is particularly the case for minerals whose high-grade deposits are depleting. The aim of this review is to present our recent efforts on developing new routes for the utilization of low-grade minerals, such as iron ores and brine-containing lithium. The emphasis on the two minerals lies in the fact that iron plays a vital role in modern-day civilization and lithium is a key component in electric vehicles for transportation. Furthermore, the utilization of magnesium chloride reserves, one of the largest wastes in western China, as raw materials for fabrication of functional materials is also included in this review.

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Concept of Seafloor Mineral Processing for Development of Seafloor Massive Sulfides

Volume 5: Ocean Space Utilization; Ocean Renewable Energy ◽

10.1115/omae2011-49981 ◽

2011 ◽

Cited By ~ 3

Author(s):

Yasuharu Nakajima ◽

Shotaro Uto ◽

Shigeo Kanada ◽

Joji Yamamoto ◽

Ichihiko Takahashi ◽

...

Keyword(s):

High Pressures ◽

Pure Water ◽

Analytical Data ◽

Mineral Resources ◽

Mineral Processing ◽

Column Flotation ◽

Metallic Elements ◽

Massive Sulfides ◽

Chemical Reagents ◽

Froth Layer

Seafloor Massive Sulfides (SMS), which were formed by deposition of precipitates from hydrothermal fluids vented from seafloor, is one of unconventional mineral resources beneath deep seafloors in the world. The authors have proposed the concept of seafloor mineral processing for development of SMS, where useful minerals included in SMS ores are separated on seafloor to be lifted while the remaining gangue is disposed on seafloor in appropriate ways. To apply column flotation, one of conventional methods in mineral processing, to seafloor mineral processing, the authors carried out simulating experiments of column flotation on deep seafloor using ores including copper, iron, lead and zinc as metallic elements. Prior to the experiments at high pressures, preparatory experiments at the atmospheric pressure were carried out to find out the optimum condition of the properties of pulp, a mixture of feed ore, water and chemical reagents. In flotation experiments at high pressures, formation and overflow of froth layer by bubbling were observed at 1MPa in both of pulps with pure water and artificial seawater. The analytical data showed that the concentration of metallic elements such as copper and zinc in the concentrates recovered from the experiments was higher than that in the feed ores while the concentration of silicon and calcium, which are assigned to gangue, in the concentrates was lower than that in the feed ores. These results suggest that column flotation can be applied to operation on seafloor.

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A Study of the Coupling Relation between Mineral Resources Exploitation and Ecological Environment: Evidence from the Grassland of Inner Mongolia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/811/1/012005 ◽

2021 ◽

Vol 811 (1) ◽

pp. 012005

Author(s):

Xing Long Xie

Keyword(s):

Inner Mongolia ◽

Mineral Resources ◽

Ecological Environment ◽

Resources Exploitation

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Fate and Transport of Pathogens of Reclaimed Water in Floatation System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.281.286 ◽

2011 ◽

Vol 281 ◽

pp. 286-290

Author(s):

Pei Qian Dou ◽

Chun Bao Sun

Keyword(s):

Water Reuse ◽

Reclaimed Water ◽

Water Safety ◽

Treatment Technology ◽

Temporal And Spatial Distribution ◽

Flotation Reagents ◽

Index Study ◽

Microbiological Water Quality ◽

Variation Mechanism ◽

Floatation Process

Reclaimed water contains a mass of pathogenic microorgansims, one of the main concerns for reclaimed water reuse is the microbiological water quality and thereby the possibility of spreading diseases. In recent years, most researches focused on deep treatment of waste water. However, few studies have considered variation mechanism and transport of pathogenic microorgansims in different environment .With the more and more application of reclaimed water in mining field, we should pay more attention to hygienic safety. The inactivation by temperature, grinding, flotation reagents and adsorption of pathogens with mineral particulates are of particular importance in determining pathogens transport and distribution. Consequently, based on a synthetical pathogenic microorgansims index, study should center on the effect of floatation environment and floatation process on survive of pathogenic microorgansims and variations mechanism; the fate, temporal and spatial distribution of pathogenic microorgansims in floatation system; transport disciplinarian of pathogen in floatation process. The result of this study provides a basis and technical advice for reclaimed water safety renovation and wastewater treatment technology.

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Advances and Challenges in Developing Efficient Graphene Oxide-Based ZnO Photocatalysts for Dye Photo-Oxidation

Nanomaterials ◽

10.3390/nano10050932 ◽

2020 ◽

Vol 10 (5) ◽

pp. 932 ◽

Cited By ~ 6

Author(s):

Asim Ali Yaqoob ◽

Nur Habibah binti Mohd Noor ◽

Albert Serrà ◽

Mohamad Nasir Mohamad Ibrahim

Keyword(s):

Graphene Oxide ◽

Emerging Contaminants ◽

State Of The Art ◽

Organic Dyes ◽

Low Cost ◽

Treatment Technology ◽

Sunlight Irradiation ◽

Photo Oxidation ◽

Treatment Techniques ◽

Photocatalytic Reactors

The efficient remediation of organic dyes from wastewater is increasingly valuable in water treatment technology, largely owing to the tons of hazardous chemicals currently and constantly released into rivers and seas from various industries, including the paper, pharmaceutical, textile, and dye production industries. Using solar energy as an inexhaustible source, photocatalysis ranks among the most promising wastewater treatment techniques for eliminating persistent organic pollutants and new emerging contaminants. In that context, developing efficient photocatalysts using sunlight irradiation and effectively integrating them into reactors, however, pose major challenges in the technologically relevant application of photocatalysts. As a potential solution, graphene oxide (GO)-based zinc oxide (ZnO) nanocomposites may be used together with different components (i.e., ZnO and GO-based materials) to overcome the drawbacks of ZnO photocatalysts. Indeed, mounting evidence suggests that using GO-based ZnO nanocomposites can promote light absorption, charge separation, charge transportation, and photo-oxidation of dyes. Despite such advances, viable, low-cost GO-based ZnO nanocomposite photocatalysts with sufficient efficiency, stability, and photostability remain to be developed, especially ones that can be integrated into photocatalytic reactors. This article offers a concise overview of state-of-the-art GO-based ZnO nanocomposites and the principal challenges in developing them.

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Hydraulic and treatment performance of pervious pavements under variable drying and wetting regimes

Water Science & Technology ◽

10.2166/wst.2011.150 ◽

2011 ◽

Vol 64 (8) ◽

pp. 1692-1699 ◽

Cited By ~ 8

Author(s):

C. F. Yong ◽

A. Deletic ◽

T. D. Fletcher ◽

M. R. Grace

Keyword(s):

Suspended Solids ◽

High Flow ◽

Pollutant Removal ◽

Low Flow ◽

Storm Event ◽

Stormwater Treatment ◽

Storm Events ◽

Treatment Technology ◽

Porous Asphalt ◽

Treatment Performance

Pervious pavements are an effective stormwater treatment technology. However, their performance under variable drying and wetting conditions have yet to be tested, particularly under a continuous time scale. This paper reports on the clogging behaviour and pollutant removal efficiency of three pervious pavement types over 26 accelerated years. These pavements were monolithic porous asphalt (PA), Permapave (PP) and modular Hydrapave (HP). Over a cycle of 13 days, the period of which was equivalent to the average annual Brisbane, Australia rainfall (1,200 mm), the pavements were randomly dosed with four different flows. Drying events of 3 h duration were simulated during each flow. Inflow and outflow samples were collected and analysed for Total Suspended Solids (TSS), Total Phosphorus (TP) and Total Nitrogen (TN). To evaluate the rate of clogging, a 1 in 5 year Brisbane storm event was simulated in the 6th, 8th, 12th, 16th, 20th and 24th week. Under normal dosing conditions, none of the pavements showed signs of clogging even after 15 years. However, under storm conditions, both PA and HP started to clog after 12 years, while PP showed no signs of clogging after 26 years. The drying and various flow events showed no effects in TSS removal, with all systems achieving a removal of approximately 100%. The average TP removal was 20% for all flows except for low flow, which had a significant amount of leaching over time. Leaching from TN was also observed during all flows except high flow. The TSS, TP and TN results observed during storm events were similar to that of high flow.

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Electrocoagulation of arsenic using iron nanoparticles to treat copper mineral processing wastewater

Separation and Purification Technology ◽

10.1016/j.seppur.2011.02.028 ◽

2011 ◽

Vol 79 (2) ◽

pp. 285-290 ◽

Cited By ~ 13

Author(s):

Patricio Nuñez ◽

Henrik K. Hansen ◽

Sandra Aguirre ◽

Cristian Maureira

Keyword(s):

Iron Nanoparticles ◽

Mineral Processing ◽

Copper Mineral

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Will anaerobic digestion of solid waste survive in the future?

Water Science & Technology ◽

10.2166/wst.2006.249 ◽

2006 ◽

Vol 53 (8) ◽

pp. 187-194 ◽

Cited By ~ 63

Author(s):

L. De Baere

Keyword(s):

Anaerobic Digestion ◽

Municipal Solid Waste ◽

Solid Waste ◽

Biological Treatment ◽

Operating Costs ◽

Organic Fraction ◽

Treatment Technology ◽

Treatment Techniques ◽

The Future ◽

Viable Treatment

Anaerobic digestion has captured a significant share of the European market for the biological treatment of the organic fraction in municipal solid waste. Almost 4 million ton per year in digestion capacity has been installed through the construction of more than 120 full-scale plants. Not all plants have been equally successful, due to poor planning, design or bad operation. This, besides higher than expected investment and operating costs, may have slowed down the growth of anaerobic digestion of solid waste. However, an evaluation of the development of anaerobic digestion over the last 15 years shows that there is now a greater diversity in application, a wider range in types of systems and suppliers, and a continued increasing rate of implementation throughout most parts of Europe. New alternative treatment techniques have not seen the same level of success as anaerobic digestion. Anaerobic digestion has been established as a viable treatment technology for the organic fraction of municipal solid waste and will most likely play an even more important role in the future.

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Study on Ecological Environment Compensation Mechanism about Mineral Resources Development in Western China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.5160 ◽

2012 ◽

Vol 518-523 ◽

pp. 5160-5164

Author(s):

Min An Tang ◽

Bao Ling Sun ◽

Huan Yan Xu

Keyword(s):

Mineral Resources ◽

Western China ◽

Ecological Environment ◽

Compensation Mechanism ◽

Environment Impact ◽

Compensation Policy ◽

Ecological Compensation ◽

Key Issues ◽

Important Position

This paper firstly introduces the important position of western mineral resources in China and the important role of mining development for economic development in western region and China, and then lists the ecological environment impact caused by mining action and analyzes the necessity of ecological compensation mechanism. Finally it discusses the key issues about ecological compensation policy, and presents some relevant recommendations about construction of eco-compensation mechanism.

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