Ion-exchange recovery of cyanide from alkaline effluents: kinetic and equilibrium modelling under controlled alkaline conditions.

Darlington Ashiegbu, Paballo Pilane, Olga Bazhko, Sherif Ishola Mustapha, Herman Potgieter

Abstract read

In one paragraph

Article in Environmental science and pollution research international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Darlington AshiegbuSchool of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa. Darlington.ashiegbu@wits.ac.za.ORCID http://orcid.org/0000-0003-2204-6248

Paballo PilaneSchool of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa.

Olga BazhkoCouncil for Mineral Technology (Mintek), Johannesburg, South Africa.

Sherif Ishola MustaphaSchool of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa.

Herman PotgieterSchool of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In hydrometallurgical and electroplating processes, cyanide serves as a cornerstone reagent but poses substantial environmental and regulatory challenges due to its toxicity and persistence in effluents. This work establishes a rigorous calibration-first framework for cyanide recovery using strong-base ion-exchange resins under alkaline, process-relevant conditions. Matrix-matched cyanide ion selective electrode (ISE) calibrations were generated at pH values of 10-13 with validated slope, linearity, and stability criteria, enabling accurate speciation accounting and eliminating measurement uncertainty typical of high-alkalinity systems. Among the resins evaluated, Purolite A500-L, a type I strong-base macroporous anion-exchange resin based on a polystyrene-divinylbenzene matrix with quaternary ammonium functional groups and a total exchange capacity of approximately 1.15 eq L⁻

Indexed as

CyanidesWater Pollutants, ChemicalAdsorptionHydrogen-Ion ConcentrationIon ExchangeIon Exchange ResinsKineticsModels, ChemicalWaste Disposal, FluidCyanidesIon Exchange ResinsWater Pollutants, ChemicalAlkaline adsorptionCyanide recoveryIon exchangePseudo-second-order kineticsPurolite A500Sustainable hydrometallurgy

Identifiers

PMID42430087

DOI10.1007/s11356-026-38011-4

PMCPMC13424284

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LicenceCC BY

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.