Abstract
The possibility of metal removal from the real acid mine drainage (AMD) in the area of copper ore mines in the southeast Serbia, was investigated through a combination of neutralization and adsorption methods. This approach of metal removal from AMD includes a two-step neutralization method in the first phase, aiming to separate metals as sludge. The results of laboratory test revealed that more than 99 mass % of Fe is removed up to pH 4 and more than 99 mass % of Cu up to pH 7. Based on the results obtained in laboratory conditions, a test on a semi industrial plant was carried out. The two-step neutralization separately removed Fe and Cu at pH 4 and 7, respectively. Especially, the obtained sludge at pH 7 included 1.24 mass % of Cu, much higher than usual Cu ore. Chitosan was applied for dissolved Mn removal from treated AMD. After 24 h incubation, 70 mass % of Mn is removed from the treated AMD at pH 7.4. Mn concentration was reduced from approx. 35 mg L−1 to 5 mg L−1. These results have indicated that a combination of neutralization and adsorption methods could be used effectively for metal removal from real AMD.
Highlights
Natural resources such as coal, iron, nonferrous metals, precious metals, industrial minerals, etc., are of integral importance for the development of human societies
Mn removal rate reached 90 mass % when 4 g of chitosan was applied to the adsorbent for 0.5 mM of Mn solution
Study, the the possibility possibility for for aa new new approach approach of of metal metal ion ion removal removal was was investigated. This approach approach included included the the two-step two-step neutralization neutralization and and adsorption adsorption methods methods and and was was applied applied to to the the. This real acid mine drainage (AMD) water generated from the copper mines in the southeast of Serbia
Summary
Natural resources such as coal, iron, nonferrous metals, precious metals, industrial minerals, etc., are of integral importance for the development of human societies. The generation of AMD from weathering of sulfidic the copper ore mine treatment plant in southeast Serbia continues to significantly impact local and ore and disposal overburden in the copper ore mine treatment plant in southeast Serbia continues to regional water resources (Figure 1). The European and local legislation rules and concerns for environmental protection requests the removal of heavy metal ions from wastewater, in order to keep their concentrations below the maximum allowable value required by the law [24], prior to their releasing into the environment. In order to investigate the possibility for a new approach of metal ions removal, some organic materials were applied to the treated AMD neutralized through the semi industrial plant at around pH 7–8 below the effluent standard
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