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Applied Sciences
Special Issues
Recent Development and Application of Resource Eco-Recovery
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Recent Development and Application of Resource Eco-Recovery

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 1754

Special Issue Editor

Dr. Nag-Choul Choi

E-Mail Website
Guest Editor
Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
Interests: biomining; waste recycling based on bioleching; new bioleaching technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The eco-recovery of resources is an eco-friendly or economical method of recovering valuable resources from sulfide minerals, which are present in solid waste and low-grade minerals.

The recovery, separation and recycling of sulfide minerals in solid resources have limitations such as their energy consumption, excessive use of chemicals, secondary pollutants, and lack of field-scale applicability for evaluation.

Therefore, a new resource eco-recovery method (biological/chemical leaching, physical/chemical concentration and separation, etc.) is needed that can circumvent or overcome these limitations.

This Special Issue entitled “Recent Development and Application of Resource Eco-Recovery” aims to reflect on the recent advancements in resource recovery, which will help to combat its associated challenges. Any submissions related to the abovementioned topics are welcome.

Dr. Nag-Choul Choi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioleaching
  • sulfide minerals
  • sulfur-oxidizing bacteria
  • waste recycling

Published Papers (1 paper)

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Research

12 pages, 1666 KiB  
Article
Estimation of Rate Constants and Mixing Characteristics in Flotation Columns
by Chul-Hyun Park
Appl. Sci. 2021, 11(21), 10084; https://doi.org/10.3390/app112110084 - 28 Oct 2021
Cited by 1 | Viewed by 1339
Abstract
The effect of mixing in a flotation column has long been recognized as an important factor in determining the performance of flotation. The paper presents the effects of mixing on the rate constant in a flotation column, and the establishment of relationships based [...] Read more.
The effect of mixing in a flotation column has long been recognized as an important factor in determining the performance of flotation. The paper presents the effects of mixing on the rate constant in a flotation column, and the establishment of relationships based on vessel dispersion numbers (Nd) that can describe axial dispersion. The rate constants were evaluated using models of plug flow, fully mixed tanks, and axial mixing for a coal cleaning operation. Results showed that fine particles are similar between each model; however, for coarse particles, the deviation is large in the case of perfect mixing, while axial mixing is suitable. It reveals the suitability of using an axial dispersion model for estimating the rate constants, particularly for coarser particles. A regression equation to determine the flotation rate constant was also developed with Nd values between 0.2 to 0.5. The ratio of particles to liquid the residence times time (τp/τL) decreases with particle size from small sizes to coarser sizes. Axial dispersion is increased by the superficial gas velocity while is suppressed by the wash water. The relationship between calculated and observed Nd can be used with a 94% accuracy for the coal cleaning application within the range of operating conditions of superficial gas velocity (0.7–1.6 cm/s), superficial wash water velocity (0.1–0.4 cm/s), and Hc/dc (26.8–32.7). The empirical relationship of Nd with significant variables along with the aspect ratio of the column was found to be applicable for coal beneficiation. It may be useful in terms of design and scale up of the columns. Full article
(This article belongs to the Special Issue Recent Development and Application of Resource Eco-Recovery)
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