Wastewater Treatment in Mineral Processing of Non-Ferrous Metal Resources: A Review

Abstract

Water used by mining enterprises needs to be comprehensively recovered and utilized to achieve clean production. This requires the effective treatment of mineral processing wastewater. Wastewater produced during non-ferrous metal mineral processing contains a complex mixture of pollutants at high concentrations, making comprehensive treatment difficult. Here, the sources of and hazards posed by wastewater produced during non-ferrous metal mineral processing are introduced and the techniques for removing heavy metal ions and organic chemicals are reviewed. Chemical precipitation and adsorption methods are often used to remove heavy metal ions. Chemical precipitation methods can be divided into hydroxide and sulfide precipitation methods. Organic chemicals are mainly removed using oxidation methods, including electrochemical oxidation, photocatalytic oxidation, and ultrasonic synergistic oxidation. External and internal cyclic utilization methods for treating wastewater produced by mineral processing plants are introduced, and a feasibility analysis is performed.

Facile Synthesis of Sodium Dodecyl Sulfate Intercalated Mg‐Al LDH and its Excellent Adsorption Performances for Cu2+ from Aqueous Solution

“…Therefore, it is very imperative to develop an efficient method for the treatment of heavy metal ions in water. Currently, the primary treatment methods for addressing heavy metal contamination in water emcompass phytoremediation, [5] chemical precipitation, [6] adsorption, [7] ion exchange, [8] photocatalysis, [9] electrocoagulation [10] and membrane process [11] . Among these diverse techniques, adsorption stands out as a widely recognized and efficient approaches for heavy metal removal, owing to its simplicity, high efficiency and cost‐effectiveness [12] .…”

Multi‐model predictive control of converter inlet temperature in the process of acid production with flue gas

“…Direct emission of flue gas containing SO 2 into the atmospheric environment will lead to a range of environmental issues, including air contamination and acidification of soil and pose a great threat to human life and health. 2 Therefore, controlling the presence of SO 2 in flue gas is of utmost importance. According to the characteristics of high SO 2 concentration and a wide range of variations, a common approach to recycling it involves production of sulfuric acid.…”

“…Hence, smelting process will produce substantial quantities of SO$$$ {}_2 $$$‐laden flue gas. Direct emission of flue gas containing SO$$$ {}_2 $$$ into the atmospheric environment will lead to a range of environmental issues, including air contamination and acidification of soil and pose a great threat to human life and health 2 . Therefore, controlling the presence of SO$$$ {}_2 $$$ in flue gas is of utmost importance.…”

Utilization of Flotation Wastewater for Separation of Chalcopyrite and Molybdenite by Selective Surface Passivation

“…For instance, flotation process consumes 5-7 tons of water per 1 ton of raw ore [2]. Flotation wastewater is usually reused in industry after necessary treatment [2][3][4][5]. However, some harmful pollutants, chemicals, ions, organics, etc., in the wastewater accumulate with increased recycling, which interfere with the flotation process [6].…”