Dissolution kinetics of manganese during nickel recovery from high iron grade laterite by acid leaching combined NaOH-assisted mechanochemical technology

Seda Çetintaş; Deniz Bingöl

doi:10.17776/csj.698346

EN

Dissolution kinetics of manganese during nickel recovery from high iron grade laterite by acid leaching combined NaOH-assisted mechanochemical technology

Abstract

This study investigates the effect of the process involving a combination of sodium-based reagent-assisted mechanochemical conversion (NaOH-MC) and leaching, which was developed to provide highly efficient nickel recovery, on the amount of dissolved manganese during nickel recovery. For this purpose, firstly laterite was treated with NaOH as a reagent and then leaching performed in sulphuric acid medium. Response Surface Methodology (RSM) was successfully used as a statistical approach to determine the effect of parameters for both processes and to optimize processes conditions in terms of dissolved manganese. In optimum conditions determined as 0.5 M H2SO4, 55 mL/g liquid to solid ratio, 75 ºC and 30 min; dissolution amount of manganese from NaOH-MC treated laterite was achieved as 97.54% ± 1.06 (N = 2) with standard deviation. In addition, the dissolution behavior of manganese was defined by a control mechanism, a combination of chemical reaction and diffusion based on the shrinking core kinetic model. The activation energy of manganese dissolution was found as 35.42 kJ/mol. According to the results, the mechanochemistry contributed positively to the dissolution of manganese due to the increased leachability of laterite at low temperature and in a short time with low acid consumption.

Keywords

Supporting Institution

TÜBİTAK

Project Number

116M076

Thanks

This work was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) [Grant Number 116M076].

References

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Authors

Seda Çetintaş
0000-0002-6055-8474
Türkiye

Deniz Bingöl ^*
0000-0002-9396-2422
Türkiye

Publication Date

June 25, 2020

Submission Date

March 3, 2020

Acceptance Date

June 2, 2020

Published in Issue

Year 2020 Volume: 41 Number: 2

DOI

https://doi.org/10.17776/csj.698346

IZ

https://izlik.org/JA67XA92MX

Cite

RIS / Bibtex

APA

Çetintaş, S., & Bingöl, D. (2020). Dissolution kinetics of manganese during nickel recovery from high iron grade laterite by acid leaching combined NaOH-assisted mechanochemical technology. Cumhuriyet Science Journal, 41(2), 397-406. https://doi.org/10.17776/csj.698346