Multi-criteria decision making for the choice problem in mining and mineral processing: Applications and trends

Sitorus, Fernando; Cilliers, J.J.

doi:10.1016/j.eswa.2018.12.001

Cited by 143 publications

(86 citation statements)

References 132 publications

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“…Then, it decreases to 60.42% as the current density continues to increase to 30.22 mA/cm 2 . The current density is related to the amount of dissolved iron ions and the formation of Fe(OH) 3 , which determines the COD removal efficiency [20]. It can also affect the cell voltage through various overpotentials, which may be conducive to the removal efficiency of the COD.…”

Section: Effect Of Ec Parameters On Cod Removal Rate Of Mixed Wastewatermentioning

confidence: 99%

“…However, these techniques possess such disadvantages as inefficiency in COD removal, extreme operating conditions, high operation cost, huge instrument investment, etc. It is worth noting that coagulation-flocculation, the most common technique in beneficiation plants because of its economy, usually has a relative low COD removal rate of only 35% [3]. Electrocoagulation (EC) has become widely used as a wastewater treatment technology in the past decade and has exhibited a satisfactory removal of COD in diverse fields, such as in textiles [4], the food industry [5], dairying [6], brackish water [7], and potable water [8].…”

Section: Introductionmentioning

confidence: 99%

“…Fe 2+ + 2OH − → Fe(OH) 2 (5) As shown in above equations, the iron anode is used to generate ions in the aqueous medium. The generated iron ions are then immediately hydrolyzed to form Fe(OH) 3 5 (OH) 2+ , depending on the solution pH [10]. These hydroxides and polyhydroxides are excellent adsorbents for counter ions and organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Electrocoagulation: A Promising Method to Treat and Reuse Mineral Processing Wastewater with High COD

Jing

Ren

Gao

et al. 2020

Water

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Mineral processing wastewater contains large amounts of reagents which can lead to severe environmental problems, such as high chemical oxygen demand (COD). Inspired by the wastewater treatment in such industries as those of textiles, food, and petrochemistry, in the present work, electrocoagulation (EC) is applied for the first time to explore its feasibility in the treatment of wastewater with an initial COD of 424.29 mg/L from a Pb/Zn sulfide mineral flotation plant and its effect on water reuse. Typical parameters, such as anode materials, current density, initial pH, and additives, were characterized to evaluate the performance of the EC method. The results showed that, under optimal conditions, i.e., iron anode, pH 7.1, electrolysis time 70 min, 19.23 mA/cm2 current density, and 4.1 g/L activated carbon, the initial COD can be reduced to 72.9 mg/L, corresponding to a removal rate of 82.8%. In addition, compared with the untreated wastewater, EC-treated wastewater was found to benefit the recovery of galena and sphalerite, with galena recovery increasing from 25.01% to 36.06% and sphalerite recovery increasing from 59.99% to 65.33%. This study confirmed that EC is a promising method for the treatment and reuse of high-COD-containing wastewater in the mining industry, and it possesses great potential for wide industrial applications.

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Section: Effect Of Ec Parameters On Cod Removal Rate Of Mixed Wastewatermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrocoagulation: A Promising Method to Treat and Reuse Mineral Processing Wastewater with High COD

Jing

Ren

Gao

et al. 2020

Water

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“…The pair-wise comparison matrix is multiplied with the row average matrix to find out the weighted consistency of the alternatives, then all the elements of the weighted consistency matrix [32] is divided by their respective priority vector to find out the consistency of each alternatives. Then finding the averages of all the consistency to find out the average consistency λmax.…”

Section: Methodsmentioning

confidence: 99%

Application of Simple Average Weighting Optimization Method in the Selection of Best Desktop Computer Model

Mitra¹,

Goswami²

2019

Adv. J. Grad. Res.

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Multi-Criteria Decision Making (MCDM) is one of the most emerging concepts in today’s world which enables a decision maker to select the best strategies among different available alternatives. MCDM technique helps to remove the biasness and confusion while selecting a product or process. In recent few years different MCDM methodologies finds wide area of applications in industries as well as in our daily life. In this paper, such one type of application is broadly described. One example is taken from our daily life, which is generally faced by most of the students while purchasing a desktop computer. The main objective of this paper is to select the best desktop computer models among five different models actual available in the market having different configurations. For this analysis, 100 computer users have been surveyed to know their relative preferences and choices, which of the computer specifications is most important to them. For this present analysis few numbers of criteria have been considered and also there are number of sub-criteria within each criterion (for example, the processor may be different for different models like I3, I5, I7 etc.). The MCDM methodology which is adopted for this selection process is known as Simple Average Weighting (SAW) method.

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“…Keeney, Raiffa [62], Dyer, and Sarin [63] developed the multi-attribute preference function theory. Algorithmic thinking and model building in MCDM provides a contemporary, and one of the most attractive cross-disciplinary research approaches in science and Operations Research for explaining certain kinds of human behavior and decision making [64][65][66]. Zionts [67] focused on the applications of MCDM and started popularizing the acronym "MCDM".…”

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confidence: 99%

Hybrid Group MCDM Model to Select the Most Effective Alternative of the Second Runway of the Airport

et al. 2019

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Sustainable and efficient development is one of the most critical challenges facing modern society if it wants to save the world for future generations. Airports are an integral part of human activity. They need to be adapted to meet current and future sustainable needs and provide useful services to the public, taking into account prospects and requirements. Many performance criteria need to be assessed to address issues that often conflict with each other and have different units of measurement. The importance of the criteria to evaluate the effectiveness of alternatives varies. Besides, the implementation of such decisions has different—not precisely described in advance—effects on the interests of different groups in society. Some criteria are defined using different scales. Stakeholders could only evaluate the implemented project alternatives for efficiency throughout the project life cycle. It is essential to find alternative assessment models and adapt them to the challenges. The use of hybrid group multi-criteria decision-making models is one of the most appropriate ways to model such problems. This article presents a real application of the original model to choose the best second runway alternative of the airport.

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Multi-criteria decision making for the choice problem in mining and mineral processing: Applications and trends

Cited by 143 publications

References 132 publications

Electrocoagulation: A Promising Method to Treat and Reuse Mineral Processing Wastewater with High COD

Electrocoagulation: A Promising Method to Treat and Reuse Mineral Processing Wastewater with High COD

Application of Simple Average Weighting Optimization Method in the Selection of Best Desktop Computer Model

Hybrid Group MCDM Model to Select the Most Effective Alternative of the Second Runway of the Airport

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