A Method for Cooperative Extraction and Separation of Heavy Metal Ions in Copper Waste Rock Field Wastewater
A technology for heavy metal ions and waste rock fields, which is applied in extraction water/sewage treatment, metallurgical wastewater treatment, chemical instruments and methods, etc., can solve problems such as heavy metal wastewater pollution, and achieve the effect of reducing production costs.
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Embodiment 1
[0021] On-site investigations were carried out on some representative mine wastewater with large discharge volume and serious pollution around, and the characteristics of general acid mine wastewater were summarized. Table 1 shows the simulated solution prepared according to the metal ion composition and content in mine wastewater. The extraction system separates heavy metal ions (Cu 2+ , Pb 2+ , Zn 2+ 、Cd 2+ ) and impurity ions (Ca 2+ , Mg 2+ ).
[0022] Table 1 Composition and content of metal ions in simulated solution
[0023]
[0024] The volume ratio of the saponified carboxylic acid extractant Mextral V 10 and the non-saponifiable aldoxime extractant Mextral 622H in the co-extraction agent is 2:3, the volume ratio of the co-extraction agent to the diluent is 1:5, and the saponified carboxylic acid extractant is 10mol / L NaOH is saponified, and the saponification rate is 75%. The aqueous phase is a simulated solution prepared, the volume ratio of the organic ph...
Embodiment 2
[0029] The heavy metal ions (Cu 2+ , Pb 2+ , Zn 2+ 、Cd 2+ ) and impurity ions (Ca 2+ , Mg 2+ ) for separation, the volume ratio of the carboxylic acid extractant Mextral V10 to the aldoxime and ketoxime extractant Mextral 973H in the co-extraction agent is 1:1, the volume ratio of the co-extraction agent to the diluent is 1:5, and the carboxylic acid extractant adopts 10mol / L NaOH is saponified, and the saponification rate is 75%. The water phase is a simulated solution prepared, and its composition and content are shown in Table 1. The volume ratio of the organic phase (composed of co-extraction agent and diluent) to the water phase is 1:1, and the mixture is placed on a shaker and shaken at a speed of 150rpm , the extraction time is 10min.
[0030] The components and contents of metal ions in the raffinate obtained after extraction are shown in Table 3. Raffinate pH value is 6.44, Cu 2+ , Pb 2+ 、Cd 2+ and Zn 2+ The extraction rates were 99.3%, 98.3%, 98% and 99.3%...
Embodiment 3
[0034] Heavy metal ions (Cu 2+ , Pb 2+ , Zn 2+ ) and impurity ions (Ca 2+ , Mg 2+ ) for extraction and separation. The volume ratio of the saponified carboxylic acid extractant Mextral V10 and the non-saponifiable aldoxime extractant Mextral 622H in the co-extraction agent is 2:1, the volume ratio of the co-extraction agent to the diluent is 1:5, and the saponification rate of the carboxylic acid extractant is 75%. . The water phase is wastewater from an acidic reservoir effusion pool in a waste rock field of a copper mine, with a pH value of 2.2, and its composition and content are shown in Table 4. The volume ratio of the organic phase (composed of the co-extraction agent and the diluent) to the aqueous phase was 1:2, and the mixture was placed on a shaker for shaking at a speed of 150 rpm and the extraction time was 10 min.
[0035] The components and contents of metal ions in the raffinate obtained after extraction are shown in Table 5. Raffinate pH value is 3.83, C...
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