The Core Force of Efficient Purification During the jewelry manufacturing process, processes such as electroplating and polishing generate wastewater containing large amounts of heavy metal ions, such as lead, mercury, cadmium, chromium, etc. If these heavy metals are discharged directly without treatment, they will not only cause irreversible damage to the ecological environment but also threaten human health through the food chain. As a highly targeted and effective agent for metal industry, heavy metal capturing agent provides an effective solution for the up-to-standard treatment of jewelry manufacturing wastewater.
Main Components of Heavy Metal Capturing Agent is a polymer organic compound, mainly composed of polymers with chelating groups. The molecular chains of these polymers contain a large number of active groups such as sulfhydryl (-SH) and amino (-NH₂).
Sulfhydryl can form stable chelates with heavy metal ions, while amino groups bind to heavy metal ions through electrostatic interaction, thus achieving efficient capture of heavy metals. Manufacturers of heavy metal capturing agents will optimize and adjust the components according to actual application scenarios to enhance the removal effect on specific heavy metal ions.
Notable Characteristics and Core Advantages
Characteristics
1. High Targetedness: It can specifically bind to various common heavy metal ions in jewelry wastewater, such as copper and nickel, to achieve precise removal.
2. Rapid Reaction: It can quickly undergo chelation reaction with heavy metal ions at room temperature and in a wide pH range (3-11), generating insoluble precipitates.
3. Good Compatibility: It can be combined with various wastewater treatment processes, such as coagulation sedimentation and filtration, without affecting the original treatment process.
Advantages 1.High Removal Efficiency: Compared with traditional metal removers, heavy metal capturing agent has a higher removal rate of heavy metal ions, which can significantly reduce the content of heavy metals in wastewater and easily meet national discharge standards.
2. Controllable Cost: Although its unit price is slightly higher than that of some ordinary metal industry agents, the comprehensive treatment cost is reduced due to less usage and good treatment effect, which can reduce subsequent treatment processes.
3. High Safety: Heavy metal capturing agent is non-toxic and harmless in itself, and will not cause secondary pollution to the environment, in line with the concept of green environmental protection.
Usage Methods 1. Agent Preparation: Dissolve the heavy metal capturing agent in water at a ratio of 10%-30%, and stir evenly to prepare a liquid agent.
2. Dosing Operation: According to the concentration of heavy metal ions in the wastewater, add the agent to the reaction tank through a metering pump, with a general dosing amount of 50-500ppm. After dosing, stir and react for 10-30 minutes to ensure that the agent fully reacts with heavy metal ions.
3. Subsequent Treatment: After the reaction is completed, add flocculant and coagulant aid to make the generated precipitates flocculate into clusters, and carry out solid-liquid separation through sedimentation, filtration and other methods to achieve effective removal of heavy metals.
4. Application Case of Jewelry Manufacturing Wastewater Treatment A large jewelry manufacturing enterprise produces about 500 tons of electroplating wastewater every day, which contains copper ions (concentration about 80mg/L) and nickel ions (concentration about 30mg/L). The enterprise introduced the heavy metal capturing agent treatment process. The specific process is as follows: first, adjust the wastewater to pH 8-9, then add heavy metal capturing agent (dosing amount 300ppm), and stir for 20 minutes; then add polyaluminium chloride (PAC) and polyacrylamide (PAM) for flocculation and sedimentation.
The treated wastewater was detected, and the concentration of copper ions was reduced to 0.3mg/L, and the concentration of nickel ions was reduced to 0.1mg/L, which is far lower than the requirements of the Discharge Standard of Pollutants for Electroplating (GB 21900-2008). At the same time, the enterprise saves about 300,000 yuan in wastewater treatment costs every year, truly achieving a win-win situation of economic benefits and environmental benefits. In conclusion, heavy metal capturing agent plays a key role in the treatment of jewelry manufacturing wastewater by virtue of its unique components, remarkable characteristics and advantages, as well as simple and effective usage methods. With the increasingly strict environmental protection requirements, heavy metal capturing agents will be widely used in more industrial wastewater treatment fields, contributing to the protection of lucid waters and lush mountains.
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