Comparison of Efficiencies of Neutralizing Agents for Heavy Metal Removal from Acid Mine Drainage

Zendelska, Afrodita and Trajanova, Adrijana and Golomeova, Mirjana and Golomeov, Blagoj and Mirakovski, Dejan and Doneva, Nikolinka and Hadzi-Nikolova, Marija (2022) Comparison of Efficiencies of Neutralizing Agents for Heavy Metal Removal from Acid Mine Drainage. Journal of Mining and Environment, 13 (3). pp. 679-691. ISSN Print ISSN: 2251-8592 Online ISSN: 2251-8606

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Abstract

The treatment of acid mine drainages is usually based on two basic technologies, active and passive treatment technologies. Whichever acid mine drainage (AMD) treatment method is employed, a neutralizing procedure that raises the water's pH over 7.0 using alkaline agents is required prior to discharge. A comparison of eight different agents (BaCO3, Na2CO3, NaOH, KOH, K2CO3, MgO, CaCO3, and Ba(OH)2) was performed in order to choose the most effective neutralizing agent for acid mine drainage treatment. The experiments were performed using a multi-component synthetic aqueous solution with an initial concentration of 10 mg/L of the Cu, Mn, Zn, Fe, and Pb ions and an initial pH value of 1.9. According to the research, the most effective neutralizing agent for the removal of heavy metals from a multi-component aqueous solution is MgO, while the least effective agent was Na2CO3. The obtained series of effective neutralizing agents for the removal of heavy metals from a multi-component aqueous solution are presented in the work. The effect of the studied concentration of neutralizing agents depends on the neutralizing agents and heavy metals that are used. The percentage of heavy metals removed from aqueous solutions increases along with rising pH values. The consumption of the neutralizing agent decreases as the concentration of the neutralizing agent is increased. In addition, the time taken to achieve pH depends on the agent concentration. In particular, as the concentration of the neutralizing agent increases, the time to reach the pH decreases.

Item Type:	Article
Subjects:	Engineering and Technology > Environmental engineering Engineering and Technology > Materials engineering
Divisions:	Faculty of Natural and Technical Sciences
Depositing User:	Afrodita Zendelska
Date Deposited:	19 Oct 2022 11:41
Last Modified:	19 Oct 2022 11:41
URI:	https://eprints.ugd.edu.mk/id/eprint/30254

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